PAGE OF Division DATE - Lunar and Planetary Institute · Systems Division DATE 2/5/70 4. 0...

NO. ' REV. NO • . • ~ I

ATM 854 A A2 ALSEP Data Transmitter Failure Mode, Effects and Criticality Analysis PAGE 1 OF

~ Systems Division

DATE 6/15/70

The Failure Mode, Effects, and Criticality Analysis for the A2 ALSEP Data Transmitter contained herein is based on the released schematic drawings identified in the FMECA work sheets.

The present FMECA effort deviates slightly from ATM 243 11 Instructions for Use in Conducting the Failure Mode, Effects, and Criticality Analysis 11

in that it does not make use of the 11 System Effect Numbers 11 (E). The reasons for this deviation are:

(1) in a redundant end item, the System Effect Numbers are not applicable.

(2) the present approach enables the derivation of the transmitter reliability in terms of part failure modes and their probabilities of occurrence, and the derivation of probabilities of occurrence for the end-item failure modes.

This document is prepared in accordance with the requirements of the Reliability Plan RA-01 of contract NAS 9-5829.

"r:t The Failure Mode, Effects, and Criticality Analysis has been updated to reflect the modifications to the Data Transmitter circuit since the original release of this ATM. The current analysis reflects to circuit configuration shown in Bendix drawing 2344601, revision G (with ECN 2344601 G2). Based on this circuit configuration, the Transmitter has a ''failure mode 11

reliability prediction of • 98901.

Revised by: T. W. ox

49

ALSEP Reliability Department

Approved by: Q vn c. .. YJ~j P. McGinnis ALSEP Reliability Department

NO. REV. NO.

: : I ~ A2 ALSEP: Data Transmitter Failure Mode, Effects and Criticality Analysis (FMECA)

ATM-854

PAGE 2

A

OF

DATE 6/15/70

I. 0 SCOPE

This report presents a Failure Mode, Effects and Criticality Analysis performed on the Data Transmitter and documented in the attached worksheets.

The objectives of this analysis are:

1. Establish the effect of the individual part failure modes on the operation of the Data Transmitter

2. Establish the probability of occurrence of each recorded part failure mode for the mission duration of one year

3. Establish the most predominant Transmitter failure modes, and their probability of occurrence

4. Establish the most predominant part failure modes in terms of probability of occur renee

5. Establish the Transmitter reliability from the point of view of Failure Mode, Effects and Criticality Analysis.

This FMECA effort refers to one Transmitter unit only, and not to the redundant set-up.

2. 0 SUMMARY OF FINDINGS

Table 1 high-lights the Transmitter FMECA findings.

Table 1 tabulates the Transmitter (end-item) failure modes in the order of decreasing probability of occurrence, their probability of occurrence (unreliability), and their criticality ranking which is a qualitative evaluation of the effects of these end-item failure modes on the ALSEP equipment mission.

The summation of the unreliabilities of the Transmitter failure modes is also an expression of the Transmitter reliability which is . 98901; this figure compares favorably with the reliability design goal of . 985 for one Transmitter unit for a one year mission. Both of the above figures exclude the Transmitter telemetry circuitry.

49

: :. I A2 ALSEP: Data Transmitter Failure Mode, Effects and Criticality Analysis (FMECA)

NO.

ATM-854

PAGE 3

REV. NO.

II

OF 49

DATE 6/15/70

3. 0 FMECA AND RELIABILITY PREDICTION

One of the objectives of this FMECA effort is to determine the Transmitter reliability on the basis of the part failure modes that could have an adverse effect on the Transmitter operation. The reliability figure arrived at through this study is . 98901. This figure does not reflect the partial failure rates of all those parts whose catastrophic failure modes of opens and shorts could have no effect on the Transmitter operation. Such part failure modes whose occurrence could have 11 no significant effect" on the Transmitter have a probability of occurrence of 464.2 x lo- 5. Furthermore, for practically all electronic parts (excepting varactor diodes, oscillator crystal, sensitors and thermistors whose ''drift" is more significant) the failure mode of parameter drift was found to have "negligible effect" on the Transmitter operation. These "drift" failure modes have not been recorded on the FMECA worksheets, even though they were considered in this study, for the purpose of high-lighting the effects of the catastrophic failure modes (i.e. opens and shorts) of the Transmitter constituent electronic parts.

A "standard 11 reliability prediction per MIL-STD-7 56A shows the Transmitter to have a reliability estimate of . 97492. This standard prediction employed 11total 11 part failure rates derived from ATM 605. The same basic failure rates are used for FMECA, except this time failure rates per failure mode are used. This is accomplished through the breakdown of the part "total" failure rate into failure mode components. The component failure mode failure rates are denoted by the symbol of a in column 2 of the FMECA worksheets; this data is obtained from ATM 243.

: : . ~ A2 ALSEP: Data Transmitter Failure Mode, Effects and Criticality Analysis (FMECA)

NO.

ATM-854

PAGE 4

REV. NO.

OF 49

Aerospace Systems Division

DATE 2/5/70

4. 0 CRITICALITY RANKINGS (C. R.)

Criticality rankings, as used in Table 1 of this report, are qualitative evaluations of the Transmitter failure mode effects on the ALSEP mission. These rankings are based on the following definitions:

C. R. I End-item failure modes that totally disable the ALSEP mis sian.

C. R. II End-item failure modes that partially disable the ALSEP mission, such as loss of data of some experiments or partial loss of data of any one experiment.

C. R.III

c. R.rv

End-item failure modes that have "no (adverse) effect" on the ALSEP mis sian on account of end-item redundancy.

End-item failure modes of redundant end-items whereby the subject end-item functions are somewhat degraded. The "degraded" end-item could be useable, but it could also be replaced by the standby (redundant) end-item.

5. 0 FMECA METHODOLOGY

The Data Transmitter FMECA has been performed in the manner shown in the attached worksheets. This effort follows the steps described below:

1. Identify: Name of System, end-item and subassembly; also identify subassembly drawing number and operating time of subassembly for the duration of the ALSEP mission.

2. Enter in Column 1 the symbol of the part whose failure modes and effects are considered.

3. Enter in Column 2 the part failure mode considered, and its incidence ratio (a) in relation to all of the part's failure modes.

: ; I ~ A2 ALSEP: Data Transmitter Failure Mode, Effects and Criticality Analysis (FMECA)

NO.

ATM-854

PAGE 5

REV. NO.

OF 49

DATE 2/5/70

4. Enter in Column 3 the effects of the subject failure mode on the subject subassembly. This 11effect 11 is described concisely in a most descriptive and most recognizable statement. Ordinarily, it is best to enter here the "subassembly" failure mode; at times though, it is clearer to indicate what happens to a certain stage (i.e. Ql cut off or saturated, whereupon the output signal could be zero).

5. Enter in Column 4 the effects of the subject failure mode on the end-item output functions. Where ever possible, quantitative data is entered here; where ever quantitative date is extremely difficult to arrive at, concise qualitative statement could be entered.

6. Enter in Column 5 the failure mode probability of occurrence. This figure (aQ ; a A. t) is the product of the subassembly operating time throughout the mission, the part generic failure rate obtained from the Parts Application Analysis (PAA) worksheets and the failure mode incidence ratio obtained from A TM 243 and given in Column 2. The part failure rate obtained from the PAA worksheets already reflects the part's duty cycle.

7. Once the end-item FMECA is complete, evaluate all part failure modes in terms of probability of occurrence, and enter failure mode unreliability (Q) rank in accordance with the definition given below:

The part failure mode with the highest probability of occurrence is ranked FM Q #1; the one with the next lower probability of occurrence is ranked FM Q #2, and so on.

Item

1

2

3

4

5

Table 1. Summary of Transmitter Failure Modes

Effect of XMTR FM's XMTR Failure Modes (FM) on A2 ALSEP Equipment

Total loss of RF power output. No effect due to XMTR (Po ; 0 watts) redundancy

Major decrease (loss) in RF power output (!_'o< < 1 watt)

Minor decrease in RF power output (!_'o <1 watt)

Same as above

Minor effect on XMTR performance; if such degradation is unacceptable, the redundant XMTR can be used.

RF output signals loose all No effect due to XMTR modulation redundancy

RF output signals have erro- No effect due to XMTR neous modulation redundancy

n = 5

FM Probability of occurrence: Q x 10-S

610.7 (x10- 5 )

213.6

143. 3

114. 9

16.4

\ l Q=l098.9x1o-5

i = 1

XMTR Reliability (R) = 1 -.LQ = 1 - 1098.9 x 10-S = • 98901

A1. d54

XMTR FM Criticality Ranking

III

III

IV

III

III

~ 1:J > (b Ill 1-3 < (JQ '7 • (b ~

)> a- d. 0 Ul """~ ~

-..!)

FAILURE MODE, EFFECTS, AND CRITICALITY ANALYSIS WORKSHEET

SYSTEM: A2 ALSEP

END ITEM: Data Transmitter

Part/ Component

SUB-ASSY: Osc., Buffer, Multiplier No. :..'I'M 854

Mission DWG. NO.: 2344656 A Time: 8760 hrs

Effects o£ Failure

Symbol Failure Mode (FM) a Sub-Assembly End-Item

Cl Open (. 70) Ql output impedance (Zo) XMTR power output detuned; output signal (Po) is practically (Eo) greatly decreased. zero (Po = 0 watts)

Short (. 30) Circuit power supply is Po = 0 watts grounded

C2 Open (. 70) No effect; redundant No effect

Short (. 30) Loss o£ oscillator signal Po = 0 watts

C3 Open (. 70) Minor effect in signal No significant effect amplitude on XMTR Po

Short (. 30) Loss of signal Po = 0 watts

C4 Open (. 70) Same as with C2 open No effect

Short (. 30\ Same as with C2 short Po = 0 watts

C5 Open (. 70) Loss of signal Po = 0 watts

Short (. 30) Ql cutoff; loss of signal Po = 0 watts

C6 Open (. 70) Signal output is greatly Po = 0 watts reduced.

Short (. 30) Circuit becomes unstable Po = 0 watts (oscillatory)

REV.

Date: 27 Jan 70

Engr.: C. S.

Probability o£ occurrence FM Unreliabili (aQ)xl0- 5

Rank ty

• 245 35

• 165 36

. 245 35

• 165 36

. 245 35

• 165 36

.245 35

. 165 36

. 245 35

. 165 36

. 245 35

'"d> Ill t-3

• 165 36 ~ ~ I

~00 0 Ul ,_.,,j::..

,j::..

"'


SYSTEM: A2 ALSEP


Part/ Component

SUB-ASSY: Osc., Buffer, Multiplier No. ATM 854 Mission

DWG. NO.: 2344656 A Time: 8760 hrs.

Effects of Failure


C7 Open (. 70) Loss of oscillations Po = 0 watts

Short (. 30) Same as open Po = 0 watts

C8 Open (. 70) Loss of oscillations Po = 0 watts


C9 Open (. 70) Ql Zo becomes detuned Po ';;; 0 watts

Short (. 30) Signal path is grounded Po = 0 watts

CIO Open (. 70) Signal path is open Po = 0 watts

Short (. 30) Q1 Zo becomes detuned rJ

Po = 0 watts

"' Cll Open (. 70) Same as with CIO short Po = 0 watts

Short (. 30) Same as with C9 short Po = 0 watts

C12 Open (. 70) Increase in signal ripple No effect on XMTR Po

Short (. 30) Shorted power supply Po = 0 watts

Cl3 Open (. 70) Loss of oscillations Po = 0 watts


REV.

Date:27 Jan 70

Engr.: C. S.

Probability of occurrence FM Unreliabilit (aQ) x 10- 5 Rank

y

1.840 23

. 788 29

.245 35

. 16 5 36

1.840 2.3

• 788 29

.245 35

. 165 36

• 245 35

• 165 36

• 307 34

• 131 37

• 245 35 1:J;p Ill t-3

~ ~ • 165 36 oo' 00

0 U1 ...... H::>. ~ -.!)

FAILURE MODE, EFFECTS, AND CRITICALITY ANALYSIS WORKSHEET REV.

SYSTEM: A2 ALSEP SUB-ASSY: Osc., Buffer, Multiplier No. ATM 854 Date: 27 Jan 70 Mission

END ITEM: Data Transmitter DWG. NO.: 2344656 A Time: 8760 hrs. Engr. ~ C. S.

Effects of Failure Probability

Part/ Component of occurrence FM Unreliabilit Symbol Failure Mode (FM) a Sub-Assembly End-Item (aQ) x 10- 5

Rank y

Cl4 Open (, 70) No effect; redundant No effect • 245 35

Short (. 30) Shorted power supply Po = 0 watts . 165 36

0;15 Open (. 70) Detuned network; Eo is Po << l watt 1.840 23 -very small

Short (. 30) Same as with C9 short Po = 0 watts . 788 29

Cl6 Open (. 70) Same as with Cl4 open No effect . 245 35

Short (. 30) Same as with C14 short Po = 0 watts • 165 36

C17 Open (. 70) Same as with C 15 open Po « 1 watt • 245 35 -

Short (. 30) Same as with C9 short Po = 0 watts . 165 36

Cl8 Open (. 70) Same as with C l 0 open Po = 0 watts 1.840 23

Short (. 30) Minor effect on signal No significant effect . 788 29 on XMTR Po.

Cl9 Open (. 70) Same as with CIS short No significant effect . 245 35

Short (. 30) Same as with C9 short Po = 0 watts " 165 36

>a> Ill 1-j

~ ~ I

"' 00 \]1

0 ,j:>. ...... ,j:>.

"'


SYSTEM: A2 ALSEP


Part/ Component

SUB-ASSY:Osc., Buffer, Multiplier No. ATM 854

Mission DWG. NO.: 2344656 A Time:8760 hrs.

Effects of Failure


C20 Open (. 70) Major decrease in signal Po~ 0 watts amplitude

Short (. 30) Q3 cut off Po = 0 watts

C21 Open (. 70) Same as with C 1 0 open Po = 0 watts

Short (. 30) Q2 cut off; could operate Po':;; 0 watts class B, but Ein is small

C22 Open (. 70) Major decrease of signal Po<< 1 watt amplitude,

Short (. 30} Q4 saturated Po = 0 watts

C23 Open (. 70) Same as with C 10 open Po = 0 watts

Short (. 30) Q3 detuned, Eo too small po << 1 watt

C24 Open (. 70) Same as with C23 open Eo<< 1 watt

Short (. 30) Same as with C9 short Po = 0 watts

C25 Open (. 70) Q4 Zo detuned; Eo consid Po -:::; 0 watts erably decreased

Short (. 30) Q4 shorted Po = 0 watts

REV.

Date: 27 Jan 70

Engr.: C. S ~


y

. 245 35

. 165 36

• 245 35

. 165 36

.245 35

. 165 36

1.840 23

• 788 29

. 245 35

• 165 36

1. 840 23

. 788 29 f-t:J::t> Pl f-3 ~ ~ ....... ooo 0 U1 ....... ~

*"" ...0


SYSTEM: A2 ALSEP

END ITEM:Data Transmitter

Part/ Component

SUB-ASSY: Osc., Buffer, Multiplier No. ATM 854

Mission DWG. NO.: 2344656 A Time:8760 hrs.

Effects of Failure


C26 Open (. 70) Signal amplitude is :po >> 1 watt increased considerably

Short (. 30) Minor effect No effect

C27 Open (. 70) Same as with Cl2 open No effect

Short (. 30) Shorted power supply Po = 0 watts

Rl Open (. 05) No significant effect No effect

R2 Open (. 0 5) Ql & Q2 cut off; no Po = 0 watts oscillations

R3 Open (. 05) Ql cut off; no oscillations Po = 0 watts

R4 Open (. 05) Q2 cut off; no oscillations Po = 0 watts

R5 Open (. 0 5) Ql Zo detuned slightly No significant effect on Po.

R6 Open (. 05) Minor effect on signal No effect level and frequency

R7 Open (. 05) Q3 & Q4 cut off; no signal Po = 0 watts output

REV.

Date: 27 Jan 70

Engr.: C. S. -------

Probability of occurrence FM Unreliabilit (aQ) x 10- 5

Rank y

. 245 35

. 165 36

. 307 34

. 131 37

. 073 40

• 073 40

.073 40

.073 40

.073 40

. 073 40

. 073 40 11> Ill f-3 ~ ~ ....... ,_.00

lTI 0 ~ ,_., ~

"'


SYSTEM: A2 ALSEP


Part/ Component

SUB-ASSY: Osc. , Buffer, Multiplier No. ATH 854 Mission

DWG. NO.: 2344656 A Time: 8760 hrs.

Effects of Failure

Symbol Failure Mode (FM) Cl' Sub-Assembly End-Item

R8 Open (. 05) Minor effect on Q3 Zo. No effect

R9 Open (. 05) Q4 operates class B, and Po~ 0 watts its input signal is small.

RlO Open (. 0 5) Open signal path Po = 0 watts

Rll Open (. 05) Minor effect on signal No significant effect amplitude and frequency

Rl2 Open (. 05) Same as with R l 0 open Po = 0 watts

Rl3 Open (. 05) Q4 saturated; Eo ::: 0 volts Po = 0 watts

Rl4 Open (. 05) Open signal path Po = 0 watts

Rl5 Open (. 0 5) Q4 cut off Po = 0 watts

R16 Open (. 05) Minor impedance mi s- No significant effect match to modulator Zin on Po

CRl Open (. l 0) Q2 cutoff; no oscillations Po = 0 watts

Short (. 30) Ql & Q2 cut off Po = 0 watts

CR 2 Open (. l 0) Q2 saturated; no oscillatic ~Po = 0 watts

!Short (. 30\ Q2 cut off Po = 0 watts

REV.

Date: 27 Jan 70

Engr.: C. S.

Probability of occurrence FM Unreliabilit (aO) x 10- 5 Rank

y

. 073 40

. 073 40

.073 40

.073 40

. 073 40

• 073 40

. 073 40

• 073 40

. 073 40

5.633 14

16.899 3

1:J::r> 5.633 14 Ill 1-j

~ ~ ,_.I

16.899 3 Noo I.J1

0 H:>. ...... H:>. ...0


SYSTEM:A2 ALSEP


Part/ Component


DWG. NO.: 2344656 A Time: 8760 hrs.

Effects of Failure


CR3 Open (. 1 0) Same as C 10 open Po = 0 watts

Short (. 30) Osc. signal looses X5 Po = 0 watts, unless frequency multiplier; Eo the tuned circuits is Zero unless tuned pick-up harmonics circuits pick-up harmoni s where-upon normal

Po would be deliv-ered by XMTR

Drift (. 60) Minor effect on frequenc' No effect on Po. multiplication

Y 1 (crystal) Open (. 25) No oscillations Po = 0 watts

Short (. 05) No oscillations Po = 0 watts

Drift (. 70) Minor change in oscilla- No effect tion frequency, but tuned circuits deliver correct signal

Ql Open [CB/BE] (. 2 5) No oscillations Po = 0 watts

Short[BE / CE] (. 25) Same as open Po = 0 watts

Q2 Open [CB/BE] (. 25) Same as Ql open Po = 0 watts

Short [ CE/BE] (. 25) Same as Q1 short Po = 0 watts

REV.

Date: 27 Jan 70

Engr.: C. S. -------


y

8.760 9

26. 280 2

52.56 1

4.380 17

. 876 28

12.264 8

4.270 18

4.270 18

4.270 18 '"d> Ill 1-j

4.270 18 ~ ~ ....... woo

lJ1 0 ,j>. ..... ,j>.

"'


SYSTEM: A2 ALSEP SUB-ASSY: Osc., Buffer, Multiplier No. ATM 854 Date: 27 Jan 70 Mission

END ITEM: Data Transmitter DWG. NO.: 2344656 A Time: 8760 hrs. Engr. :__::C~·:....:S~·~---

Effects of Failure Probability Part/ Component of occurrence FM Unreliabilit

Symbol Failure Mode (FM) 0:' Sub-Assembly End-Item (aO) x 10- 5 Rank y

Q3 Open (CB/BE] (, 25) No signal output Po = 0 watts 4.270 18

Short (BE] (.125) Same as open Po = .0 watts 2. 135 20

Short [CE] (. 125) Output signal is greatly Power Amplifier 2. 135 28 decreased. can not be driven;

hence, Po = 0 watts

Q4 Open ( CB /BE] (. 2 5) Same as Q3 open Po= 0 watts 4.270 18

Short [CE/BE] (. 25) Same as open Po = 0 watts 4.270 18

Ll Open (. 90) Minor decrease in signal No significant effect 15.768 5 amplitude on Po.

Short (. 1 0) Same as with R 1 open No significant effect 1. 752 25

L2 Open (. 90) No signal output Po = 0 watts 15.768 5

Short (. 1 0) Same as open Po = 0 watts l. 752 25

L3 Open (. 90) No oscillations Po = 0 watts 15.768 5

Short (. 10) Same as open Po = 0 watts l. 752 25

L4 Open (. 90) Same as L3 open Po= 0 watts 15.768 5 'I:J> Ill f-j

Short (. 10) Same as open Po = 0 watts 1. 752 25 ~ ~ ,_.I ~00

\.11 0 ~ .......

""" -..()


SYSTEM: A2 ALSEP


Part/ Component


DWG. NO.: 2344656 A Time: 8760 hrs.

Effects of Failure


LS Open (. 90) Open signal path Po = 0 watts

Short (. 10) Shorted signal path Po = 0 watts

L6 Open (. 90) No oscillations; Eo=Ovolts Po = 0 watts

Short (. 1 0) Increase in ripple No effect

L7 Open (. 90) No signal output Po = 0 watts

Short (. 1 0) Increase in ripple No effect

L8 Open (. 90) Same as L 7 open Po = 0 watts

Short (. 1 0) Signal is AC shorted Po = 0 watts

L9 Open (. 90) Same as L 7 open Po = 0 watts

Short (. 10) Practically no signal Po = 0 watts output.

--···-- --- ------ ·------------~--

RTl Open (.50) Same as R23 open (in TM Total loss of temp. subassembly) #2 TM Data

Short (. 25) Same as open Total loss of temp. #2 TM Data

Drift (. 25) Minor loss in circuit TM accuracy reduced sensitivity

' ·- ..... ···-···--------] No effect on 0/B/M INo effect on ·

subassembly. ltrans mitte r. _______ ,_ ... ._ ____ ----------------

REV. A

Date: I 5 June 70

Engr. :_C_._s_,. ___ _

Probability of occurrence FM Unreliabili (a Q) x 10- 5 Rank

ty

15.768 5

1. 752 25

15.768 5

1. 752 25

15.768 5

1. 752 25

15.768 5

1. 752 25

15.768 5

1. 752 25

--

(13.140) 6

(6. 570) 12 1:1> Ill 1-j

(6. 570) 12 ~ ~ ....... \.}100

\.}1

0 *"' ,_., *"' "-0


SYSTEM: A2 ALSEP SUB-ASSY: Modulator

END ITEM: Data Transmitter DWG. NO.: 2344671 A

No. A.TM 854

Mission Time: 8760 hrs ----- -

Effects of Failure

Part/ Component Symbol Failure Mode (FM) Q' Sub-Assembly End-Item

Cl Open (. 70) Modulation becomes XMTR output signab erroneous; carrier are considerably signal is diminished diminished and have

erroneous modulatio

Short (. 30) Same effect as open Same effect as open

REV.

Date: 21 Jan 70

Engr.: C. S ---o-- -

Probability of occurrence FM Unreliabilit (aQ) X 10- 5 Rank

• 245 35

ps

• 165 36

C2 Open (. 70\ Signal modulation is lost; XMTR output consis s .245 35

carrier signal is of diminished carrie diminished with signals with no

modulation.

Short (. 30) Same as with C 1 open Same as with C 1 • 16 5 36 open.

C3 Open (. 70\ Minor effect on signal No significant effect 1.840 23

modulation

Short (. 30\ Signal modulation is lost XMTR output power . 788 29 has no modulation

C4 Open (. 70) No effect; redundant No effect • 307 34

Short (. 30) No significant effect No effect • 131 37

C5 Open (. 70) Same as with C4 open No effect . 307 34 "d~ Pl 1-3

Short (. 30) Same as with C4 short No effect .131 37 ~ ~ ....... 0'00

lJ1 0 ~ ...... ;!::>. '.()

y


SYSTEM: A2 ALSEP


Part/ Component

SUB-ASSY: Modulator

DWG. NO.: 2344671 A

No. ATM 854

Mission Time: 8760 hrs.

Effects of Failure

Symbol Failure Mode (FM) Q' Sub-Assembly End-Item

C6 pPen (. 70) No significant effect No effect

Short ( 0 30) Modulation signal is lost XMTR Po is not modulated

Rl Open (. 05) Carrier signal path is XMTR output power open is lost. (Po = 0 watts

R2 ppen (. 05) Modulator looses power Po = 0 watts supply

R3 ::>pen (. 05) Modulated signal path is fo = 0 watts open

R4 ppen (. 05) Minor effect on signal IM.inor effect on XMTI level output power output

R5 ::>pen ( 0 0 5) Modulated signal is not !:o < <. 1 watt !balanced

R6 ppen (. 05) !Modulation signal path ~MTR Po is not becomes open modulated

R7 ppen (. 05) pl cut off X:MTR Po is not modulated

R8 ppen (. 05) ::22 and CR 6 become cutoff KMTR Po is not modulated.

REV.

Date: 27 Jan 70

Engr.: C. S.


y

.245 35

0 165 36

.073 40

.073 40

.073 40

0 073 40

0 073 40

.073 40

0 073 40

1:l::Z:.. Ill 1-j

0 073 40 ~ ~ ........ -.]00

\J1 0 ,j:>. ..... ,j:>. -D


SYSTEM: A2 ALSEP SUB-ASSY: Modulator

END ITEM:Data Transmitter DWG. NO.: 2344671 A

No. ATM 854 Mission Time: 8760 hrs

Effects of Failure

Part/ Component Symbol Failure Mode (FM) Q Sub-Assembly End-Item

R9 Open (. 05) Modulation signals XMTR Po has com-become completely pletely erroreous erroreous. modulation

Ql Open (CB/B/E] (.25) Same as with R6 open XMTR Po has no modulation

Short[CE/BE] (. 25) Same effect as open XMTR Po has no modulation

Q2 Open (CB/B/E] (. 25) Same as with Ql open XMTR Po has no modulation.

Short(CE/BE] (. 25) Same as open XMTR Po has no modulation.

CRI Open (. 10) Minor effect on signal No significant effect modulation on XMTR Po

Short (. 30) Same as with C3 short XMTR Po has no modulation

Drift (. 70) Minor change in signal No effect modulation

REV.

Date: 21 Jan 70

Engr.: C" S. -

Probability of occurrence FM Unreliabilit (aO)xl0- 5

Rank y

• 073 40

4.270 18

4.270 18

4.270 18

4.270 18

8.760 9

26.280 2

52o560 I

1:!~ Ill t-3 ~ ~ ,_.I oooo

U1 0 ~ ..... >J:>. -..()


SYSTEM: A2 ALSEP


Part/ Component

SUB-ASSY: Modulator

DWG. NO.: 2344671 A

No. ATM 854

Mission Time: 8760 hrs

Effects of Failure

Symbol Failure Mode (FM) 0' Sub-Assembly End-Item

CR2 Open (. 10) Same as with CRl open No significant effect

Short (. 30) Same as with CR 1 short XMTR Po has no modulation

Drift (. 70) Same as with CRl drift No effect

CR3 Open (. l 0) Modulation index is No significant effect changed slightly on XMTR Po

Short (. 30) Same effect as open No significant effect on XMTR Po

CR4 Open (. 10) Same as with CR 3 open No significant effect on XMTR Po

Short (. 30) Same as with CR3 short No significant effect on XMTR Po.

CR5 Open (. 10) No significant effect No effect

Short (. 30) Same as R6 open XMTR Po has no modulation

CR 6 Open (. 1 0) No modulated signals XMTR Po has no modulation

Short (. 30) Same effect as open XMTR Po has no modulation

REV.

Date: 21 Jan 70

Engr.: C. S.

Probability of occurrence FM Unreliabilit (aQ)xl0- 5

Rank y

8.760 9

26.280 2

52.560 1

5.633 14

16.899 3

5.633 14

16.899 3

1.849 22

5.547 15

5.633 14

16.899 '"d~

3 Pl f-3 ~ ~ ....... -..DCXl

U1 0 ~ ...... ~ -..D


SYSTEM: A2 ALSEP


Part/ Component

SUB-ASSY: Modulator

DWG. NO.: 2344671 A

No. ATM 854 Mission Time: 8760 hrs.

Effects of Failure

Symbol Failure Mode (FM) 11' Sub-Assembly End-Item

Ll Open (. 90) Signal modulation becomeE XM TR Po has com-completely erroreous pletely erroreous

modulation

Short (. 1 0) Minor RF interference No significant effect thru the power supply

L2 Open (. 90) Modulating signal path XMTR Po has no is open and varactor bias modulation ing voltage is increased.

Short (o 10) Considerable loss of Po « 1 watt modulated signal thru CR6

T1 Open (. 90) Loss of carrier signal Po = 0 watts

Short (. 1 0) Same as open Po = 0 watts

REV. "

Date: 21 Ian 70

Engr.: C.S.


Rank y

15.768 5

1. 752 25

15o768 5

1. 752 25

15.768 5

1. 752 25

1:1~ {l) 1-3

~ ~ N' 000

\Jl 0 *"' ..... *"' --a


SYSTEM: A2 ALSEP


Part/ Component Symbol Failure Mode (FM)

Cl Open (. 70)

Short (. 30)

C2 Open (. 70)

Short (. 30)

C3 Open (. 70)

Short (. 30)

C4 Open (. 70)

Short (. 30)

C5 Open (. 70)

Short (. 30)

C6 Open (. 70)

Short (. 30)

SUB-ASSY: Prearn.plifier

DWG. NO · 2344681 A

No. ATN 854

Mission Time· 8760 hrs

Effects of Failure

Q' Sub-Assembly End-Item

No effect; redundant No effect

Shorted power supply Loss of XMTR powe1 output (Po = 0 Watts)

Same as with Cl open No effect

Same as with C 1 short Po = 0 Watts

Preamp signal gain is Eo<< 1 watt considerably decreased thru feedback. Q 1 - QZ become cut off Po = 0 Watts

Circuit signal path be - Po = 0 Watts

comes open

Q1 operates class B Po';;; 0 Watts

Same as with C4 open Po = 0 Watts

Q1 Zo detuned Eo<< 1 watt

Minor effect since Q 1 No effect operates practically in saturation Same effect as open No effect

REV.

Date: 22 Jan 70

~ Engr c. s.

Probability of occurrence FM Unreliabilit (a Q) x 10- 5 Rank

y

.245 35

• 165 36

.245 35

.165 36

.245 35

o165 36

. 245 35

• 165 36

1.840 23

• 788 29

.245 35

1:))-Ill 1--3

. 165 36 ~ ~ Nl

00 ,_.U1

0 *"" ..... ;!:>. -.!)


SYSTEM: A2 ALSEP



C7 Open (. 70)

Short (. 30)

C8 Open (. 70)

Short (. 30)

C9 Open (. 70)

Short (. 30)

ClO Open (. 70)

Short (. 30)

Cll Open (. 70)

Short (. 30)

Cl2 Open (. 70)

Short (. 30)

SUB-ASSY: Preamplifier

DWG. NO.: 2344681 A


Effects of Failure

a Sub-Assembly End-Item

Circuit signal gain is Eo << 1 watt greatly decreased

Q2 operates class B po = 0 watts

Same as with C5 short Eo<< 1 watt

Shorted circuit signal Po = 0 watts path

Q2 Zo becomes detuned Eo<< 1 watt

Signal is grounded Po = 0 watts

Q3 Zo detuned Po<< 1 watt

Q3 looses Vee and be- Po = 0 watts comes cut off Circuit signal gain is Po<< 1 watt greatly reduced

Q3 operates class B and Po = 0 watts Q3 Zin is detuned

Same as with C4 open Po "' 0 watts

Q3 Zo becomes detuned Eo < < 1 watt

REV.

Date: 22 Jan 70

Engr. =~C. S.


y

. 245 35

• 165 36

• 245 35

. 165 36

1.840 23

. 788 29

• 245 35

• 165 36

.245 35

.165 36

1.840 23 "d> jlJ 1-3

• 788 29 ~ s:: Nl

N~ 0 f.!>. ....., f.!>. -.!)


SYSTEM: A2 ALSEP



Cl3 Open (. 70)

Short (. 30)

Rl Open (. 0 5)

R2 Open (. 05)

R3 Open (. 05)

R4 Open (. 05)

R5 Open (. 05)

R6 Open (. 0 5)

R7 Open (. 05)

R8 Open (. 05)

R9 Open (. 05)

RIO Open (. 05)

SUB-ASSY: Preamplifier

2144681 A DWG. NO.: _______ _


Effects of Failure

0' Sub-Assembly End-Item

Same as with C l 0 open .!:o <-< l watt

Shorted signal path Po = 0 Watts

Same as with C4 open Po= 0 Watts

Ql - Q2 stages become Po = 0 Watts cut off

Minor effect Minor effect

Ql becomes saturated Po = 0 Watts and Q2 cut off

Q2 becomes saturated Po = 0 Watts

Q2 cut off Po = 0 Watts

Q3 operates class B .!:o < < 1 watt

Q3 saturated Po = 0 Watts

Q3 cut off Po = 0 Watts

Same as with C1 open Po = 0 Watts

REV.

Date: 22 Jan 70

Engr.: C. S.

Probability of occurrence FM Unreliabilit (a Q) x 10- 5 Rank

y

• 245 35

• 165 36

.073 40

. 073 40

.073 40

• 073 40

• 073 40

• 073 40

.073 40

• 073 40

.073 40

. 073 40 '"d> PI f-3 ~ ~ N' wCXl

U1 0 >~:>-.....

*'" -..o


SYSTEM: A2 ALSEP SUB-ASSY: Prean'lplifier

END ITEM: Data Transmitter DWG. NO.: 2344681 A

No. ATM 854 Mission Time: q760 hrR ' . ~ ~ ..............

Effects of Failure Part/ Component


Q1 Open [CB/B/E) (, 25) No Signal output Po = 0 watts Short [BE] (. 125) Signal output is zero Po = 0 watts Short (CE] (. 12 5) Output signal is near zero Po = 0 watts

Q2 Open [CB /B /E) (o 2 5) Same as with Ql open Po = 0 watts Short (CE] (. 12 5) Signal output is greatly Po~ 0 watts

reduced Short (BE] (. 12 5) Ql cut off Po = 0 watts

Q3 Open [CB/B/E) (. 25) Same as with Q1 open Po = 0 watts Short (CE) (. 12 5) Signal output is greatly Po~ 0 watts

reduced Short (BE) (. 12 5) Q3 cut off Po = 0 watts

L1 Open (. 90) Ql - Q2 cut off Po = 0 watts

Short (. 10) Increase in signal ripple No significant effect

L2 Open (. 90) Ql Zo detuned Po<< 1 watt

Short (. 10) No output signal Po = 0 watts

L3 Open (. 90) Same as with C4 open Po = 0 watts

Short (. 10) Q2 Zo is AC shorted Po = 0 watts

REV.

Date: 22 .Tan 70

Engr.: r._ .c:_ -

Probability of occurrence FM Unreliabili (crQ)x10- 5

ty

4.270 18 2. 135 20

2. 135 20

4.270 18 2. 135 20

2. 135 20

8.540 10

4.270 18

4.270 18

15.768 5

1. 752 25

15.768 5

1. 752 25

15.768 5

1. 752 25

Rank

1j Ill

(JQ ('!)

N ~

0 ..... ~

"'

> 1-j

~ CXl Ul ~


SYSTEM: A 2 ALSEP SUB-ASSY: Preamplifier ATM 854 No. _____ _ Date: 22 Jan 70 Mission

END ITEM: Data Transmitter DWG. NO.: 2344681 A Time: 8760 hrs. Engr.: C. S.

Effects of Failure Probability Part/ Component of occurrence FM Unreliabili

Symbol Failure Mode (FM) Q Sub-Assembly End-Item (a Q) x 10- 5 Rank

ty

L4 Open (. 90) Saine as with C4 open Po = 0 watts 15.768 5

Short (. 1 0) Q3 Zin detuned ]?o << 1 watt 1. 752 25

L5 Open (. 90) Q3 cutoff Po = 0 watts 15.768 5

Short (, 10) Increase in signal ripple No significant effect 1. 752 25

L6 Open (. 90) Q3 Zo detuned _I>o (( 1 watt 15.768 5

Short (. 1 0) Q3 Zo is AC shorted Po = 0 watts I. 752 25

L7 Open (. 90) Same as with L6 open Po <.< 1 watt 15.768 5

Short (. 1 0) Same as L6 short Po = 0 watts 1.752 25

'""d~ Ill ,_;:

OQ • CD a::: Nl Uloc

\.11 0 >I'> ..... ~ -.!)


SYSTEM: A2 ALSEP



Cl Open

Short

C2 Open

Short

C3 Open

Short

C4 Open

Short

C5 Open

Short

C6 Open

Short

SUB-ASSY: Power Amplifier

DWG. NO.: 2344640 B

No. AT.t-1 854 Mission Time: 8760 hrs

Effects of Failure


( 0 70) Open circuit signal path Total loss of XMTR power output (Po = 0 watts)

(. 30) Great mismatch presentee Great loss in XMTR to Pre-amp output power output impedance (Zo) (Po<< lwatt)

(. 70) Same as with C 1 short. Po<' ~· 1 watt -(. 30) Circuit signal path short- Po"" 0 watts

ed to ground.

(. 70) Same as with C 1 short Po -<. '< 1 watt ~

(. 30) Same as with C2 short Po = 0 watts

(. 70) Same as with C 1 open Po = 0 watts

(. 30) Q1 Zo becomes detuned Po<< lwatt

(. 70) Same as with C4 short Po<< 1watt -

(. 30\ Same as with C2 short Po = 0 watts

(. 70) Same as with C1 open Po = 0 watts

(. 30) Q2 Zo becomes detuned J>o << 1watt

REV.

Date: 27 Jan 70

Engr.: C.S.

Probability of occurrence FM Unreliabilit (aQ) x 10-S Rank

y

.920 26

. 395 32

.920 26

. 395 32

. 123 38

. 083 39

.245 35

• 165 36

.920 26

. 395 32

1.840 23

1:J~ 0 789 29 Pl 1-j

~ ~ N' 0'00

l1l 0 ,j::. ....... ,j::. --o


SYSTEM: A2 ALSEP



C7 Open

Short

C8 (Deleted)

C9 (Deleted)

ClO Open

Short

Cll Open

Short

Cl2 Open

Short


DWG. NO.: 2344640 B

No. ATM 854

Mission Time: 8760 hrs

Effects of Failure


(. 70) Slight detuning of Q2 Zo Minor effect on XMTR Po.

(. 30) Q2-Q3 interstage tuned Po<< l watt circuit becomes detuned.

(. 70) Same as with C7 open Minor effect on Po.

(, 30) Same as with C7 short Po << l watt -

(. 70) Same as with C l open Po~ 0 watts

(. 30) Q3 Zin detuned !:o (< 1 watt

(. 70) Same as with C7 short Po << l watt -(. 30) Same as with C2 short Po -= 0 watts

REV. A

Date: 15 June 70

Engr.:.~C~·~S~-------

Probability of occurrence FM Unreliabilit (aQ)xlO-S Rank

y

• 123 38

• 083 39

.920 26

• 395 32

.920 26

. 395 32

. 920 26

. 395 32 1:1~ Ill ...,:

O'Q • ro ~ Nl -Joe

Ul

0 *"' ......

*"" '-!)


SYSTEM: A2 ALSEP



Cl3 Open

Short

Cl4 Open

Short

CIS Open

Short

Cl6 Open

Short

Cl7 (Deleted)

Cl8 Open

Short

Cl9 Open

Short


DWG. NO.: 2344640 B


Effects of Failure


(. 70) Same as with Cl open Po = 0 watts

(. 30) Q3 Zo detuned Po<< 1 watt

(. 70) Q4 Zin detuned Po<-< 1 watt -(. 30) Same as with C2 short Po = 0 watts

(. 70) Same as with C 14 open Po<< 1 watt

(. 30) Same as with C2 short Po = 0 watts -

(. 70) Q4 Zo detuned Po<-< 1 watt

(. 30) Same as open Po<<lwatt

(. 70) Same as with Cl6 open fo << 1 watt


(. 70) Minor effect Minor effect on Po modulation

(. 30) Same as open Minor effect on Po modulation

REV. A

Date: 15 June 70

Engr.: C. S.


Rank y

1.840 23

. 789 29

• 920 26

• 395 32

. 123 38

.083 39

1.840 23

• 789 29

35

36

1.840 23

. 789 29

0 307 34 1::)~ Ill 1-j

~ ~ • 132 37 Nl

00~ ~

0 ..... ~ ._!)


SYSTEM: A2 ALSEP



C20 Open

Short

C21 Open

Short

C22 Open

Short

C23 Open

Short

C24 Open

Short

C25 Open

Short

C26 Open

Short


DWG. NO.: 2344640 B


Effects of Failure


(. 70) Minor RF interference No effect

( D 30) XMTR power supply is Po • 0 watts shorted

{o 70) Same as with C20 open No effect

( D 30) Same as with C20 short Po = 0 watts

(. 70) Same as with C20 open No effect










REV.

Date: 27 Jan 70

Engr.: C. S.

Probability of occurrence FM Unreliabili (a.Q) x 10- 5 Rank

ty

• 307 34

• 132 37

. 307 34

• 132 37

• 307 34

• 132 37

. 307 34

• 132 37

• 307 34

• 132 37

• 307 34

• 132 37

1:1~ D 307 34 Ill 1-3

~ ~ I

• 132 37 Noo ...01.]1

0 *"' ...... *"' ...0

FAILURE MODE, EFFECTS, AND CRITIC.t~~ . .:TY ANALYSIS WORKSHEET REV. A

SYSTEM: A2 ALSEP SUB-ASSY: Power Amplifier ATM 854 No. __________ __ Date: 15 June 70 ----------Mission

END ITEM: Data Transmitter DWG. NO.: 2344640 B Time: 8760 hrs. Engr. :__::C:...:•:...:S::...:·~----

Effects of Failure Probability

Part/ Component of occurrence FM Unreliabilit Symbol Failure Mode (FM) Q Sub-Assembly End-Item (aQ) x lO-s Rank

y

Rl Open (.05) Same as with Cl Short _!>o << 1 Watt • 037 41

R2 Open (. 05) Same as with C1 Open Po = 0 Watts • 037 41

R3 Open (. 05) Q1 Zin increases greatly Po - « 1 Watt . 037 41

R4 Open (. 05) Q1 Cut Off Po = 0 Watts . 037 41

R5 Open (. 05) Same as C4 Short Po « 1 Watt . 037 41 -

R6 Open(. 05) Q2 Zin increases greatly Po << 1 Watt . 037 41

R7 Open (.OS) Q2 Zin detuned Po <<. 1 Watt . 037 41 -

R8 Open(. OS) Same as with C6 Short Po -:~ 1 Watt -

R 9 (Deleted) . 037 41

RIO Open (. 05) Same as with C11 Short !'o Z< 1 Watt . 037 41

R11 Open(.05) Same as with C14 Open Po <<- l Watt • 037 41

Rl2 Open (.OS) Slight increase PA output _B, increases slightly . 037 41

R13 Open (.OS) No effect No effect • 061 41

C27 Open (. 70) Allows EMI conduction No effect • 123 betweenO/B/Mand PA "r:J>

Ill 1-3

Short (. 30) Lose all TM Data Lose TM Data . 053 ~ s:: w•

C28 Open (. 70) Allows EMI conduction No effect . 123 000

\J1

between 0/B/M and PA 0 ~ .......

Lose all TM Data Lose TM Data . 053 ~ Short (. 30) '-'>

FAILURE MODE, EFFECTS, AND CRITICA.w.~.fY ANALYSIS WORKSHEET

SYSTEM: A2 ALSEP SUB-ASSY: Power Amplifier

END ITEM: Data Transmitter DWG. NO.: 2344640 B


Effects of Failure

Part/ Component Symbol Failure Mode (FM) a Sub-Assembly End-Item

Q1 Open [CB/B/E] (. 25) Same as with Cl Open Po = 0 Watts

Short [CE/BE] (. 25) Same as with C2 Short Po = 0 Watts

Q2 Open [CB/B/E] (. 25) Same as Q1 Open Po = 0 Watts

Short [CE/BE] (. 25) Same as Q2 Short Po = 0 Watts

Q3 Open [CB/B/E] (. 25) Same as Q1 Open Po= 0 Watts


Q4 Open [CB/B/E] (. 25) Same as Q1 Open Po = 0 Watts


REV.

Date: 27 Jan 70

Engr.: C.S.


y

8.540 10

8.540 10

8. 540 10

8. 540 10

8.540 10

8.540 10

8.540 10

8. 540 10

1:1> Ill ..,

~ ~ I

woo ...... Ul

0 IJ:>. ...., ,.j::.. ...0

FAILURE MODE, EFFECTS, AND CRITICAL.l.TY ANALYSIS WORKSHEET

SYSTEM: A2 ALSEP


-----------------


Ll Open (. 90)

Short (. 1 0)

L2 Open (. 90)

Short (. 1 0)

L3 Open (. 90)

Short(. 10)

L4 Open (. 90)

Short(. 10)

L5 Open (. 90)

Short (. 1 0)

L27 Open (. 90)

Short (. 1 0)

L28 Open (, 90)

Short(. 10)

L29 Open (. 90)

Short(. 10)


DWG. NO.: 2344640 B


Effects of Failure


Same as with Cl Open Po = 0 Watts

Same as with C1 Short Po << 1 Watt

Q 1 Z in detuned .!:'o << 1 Watt

Same as C2 Short Po = 0 Watts

Same as C4 Short Po (< 1 Watt -

Q1 fails Short Po = 0 Watt

Same as with C1 Open Po = 0 Watts

Q4 Zin detuned Po << 1 Watt -

Same as with L4 Short Po /,< 1 Watt

Q2 Zin gets detuned and Po << 1 Watt practically shorted to ground

'I

l No effect ) Same as L16

I

iJ

REV. A

Date: 1 S June 70

Engr.: C .S. ------

Probability of occurrence FM Unreliabilit (a Q) x 10- 5

Rank y

7.884 12

. 876 28

7.884 12

. 876 28

15. 768 5

1. 752 25

7.884 12

. 876 28

7.884 12

. 876 28

15.768 5

l. 752 25

15.768 5 f"(j~

1.752 25 Ill ~

~ ~ 15. 768 5

I woo N\.11

l. 752 25 0 H::-..... H::-

"'

FAILURE MODE, EFFECTS, AND CRITICAL1TY ANALYSIS WORKSHEET

SYSTEM: A2 ALSEP SUB-ASSY: Power Amplifier



Effects of Failure


L6 Open (. 90) Same as with C6 Short Po << 1 Watt

Short (. 1 0) Q2 fails Short Po = 0 Watts

L7 Open(. 90) Same as C1 Open Po = 0 Watts

Short (. 1 0) Same as C6 Short Po << 1 Watt -L8 Open (. 90) Q2 -Q3 inter stage tuned Po « 1 Watt -

circuit gets detuned

Short(. 10) Same as Open Po « 1 Watt -

L9 Open (. 90) Same as with C1 Open Po = 0 Watts

Short (. 1 0) Q3 Zin gets detuned Po << 1 Watt

LlO (Deleted)

SB 1 thru 6 Cracked Bead No effect No effect

(encapsulated, minor performance effect)

SB 19 thru 25 Cracked Bead No effect No effect

(encapsulated, minor performance effect)

REV. A

Date: 15 June 70

Engr.: __ c_._s_··--------

Probability of occurrence FM Unreliabilit (a Q) x 10- 5

Rank y

15.768 5

1. 752 25

7.884 12

. 876 28

7.884 12

. 876 28

7.884 12

. 876 28

Nil

Nil

f-Q::r> IU 1-3 ~ ~

I woo VJ\]l

0 ~ .... >~'>-...0


SYSTEM: A2 ALSEP


Part/ Component Symbol Failure Mode ( FM)

Lll Open (. 90)

Short(. 10)

Ll2 Open (. 90)

Short (. 10)

L13 (Deleted)

L14 Open(. 90)

Short(. 10)


DWG. NO. : 2344640 B

No. l'>TH 854 Mission Time: 8760 hrs.

Effects of Failure


Q3 Zo gets detuned and Po « I Watt -looses Vee

Q3 collector becomes Po = o Watts grounded thru the Power Supply


Q4 Zin becomes Po « 1 Watt de tuned

Q4 becomes open- Po =- 0 Watts circuited

Q4 becomes shorted to Po = 0 Watts ground

REV. A

Date: 15 Tune 70

Engr. :_ C.S.


Rank y

15.768 5

1. 752 25

7.884 12

. 876 28

15.768 5

l. 752 25

t-cJ> PI t-3

~ ~ I

woo >J:>.(.]l

0 >J:>. ....... >J:>. -.!)


SYSTEM: A2 ALSEP



L15 Open(. 90)

Short (. 1 0)

L16 Open(. 90)

Short (. 1 0)

L17 Open (. 90)

Short (. 10)

Ll8 Open (. 90)

Short (. 1 0)

L19 Open (. 90)

Short(.lO)

L20 Open (. 90)

Short (. 1 0)


DWG. NO.: 2344640 B


Effects of Failure



Q4 Zo becomes detuned Po << 1 Watt

No effect; redundant No effect

Minor RF Interference No effect

Same as with L16 Open No effect

Same as with L16 Short No effect







REV.

Date: 27 Jan 70

Engr. :~c'-L.l:<s'-"-----

Probability of occurrence FM Unreliabili (a Q) x 10- 5

Rank ty

15.768 5

1.752 25

15. 768 5

1.752 25

15.768 5

1. 752 25

15.768 5

1. 752 25

15. 768 5

I. 752 25

15.768 5

1. 752 25

f-"CJ;J> PI t-3 ~ ~

I VJoo U"IU"J 0 ,j::. ...... ,j::. ...0


SYSTEM: A2 ALSEP



L21 Open (. 90)

Short(.10)

L22 Open (. 90)

Short(. 10)

L23 Open (. 90)

Short (. 1 0)

L24 Open (. 90)

Short(.lO)

L25 Open (. 90)

Short(. 10)

L26 Open(. 90)

Short (. 1 0)

L30 Open (. 90)

Short (. 10)

'


DWG. NO.: 2344640 B


Effects of Failure

Q! Sub-Assembly End-Item









Same as with LI6 Open No effect


Same as with LI6 Open No effect


Same as with C12 Open Po<< 1 Watt -Slight detuning of Minor effect on Q2-Q3 interstage XMTR Po

REV. A

Date:15 June 70

Engr.: C. S.


y

15.768 5

1.752 25

15.768 5

l. 752 25

15.768 5

1. 752 25

15. 768 5

1. 752 25

15.768 5

1. 752 25

15. 768 5

1. 752 25

7.884 12 1:J>

. 876 12 Ill 1-3

~ ~ w• 0'8; 0 >1>-...... >1>---.o


SYSTEM: A2 ALSEP



FL1 Open (. 70)

Short (. 30)

FL2 Open (. 70)

Short (. 30)

FL3 Open (. 70)

Short (. 30)

FL4 Open (. 70)

Short (. 30)

FL5 Open (. 70)

Short (. 30)

FL6 Open (. 70)

Short (. 30)


DWG. NO.: 2344640 B

Nof\TM 854


Effects of Failure

Q Sub-Assembly End-Item

Q1 emitter becomes Po = 0 Watts open circuited

Q1 Zin becomes detuned Po << 1 Watt

Q1 collector discon- Po= 0 Watts nected from power supply

Shorted power supply Po= 0 Watts

Q2 Zin detuned Po <<:. 1 Watt -

Minor effect on Q2 Zin No effect

Q2 disconnected from Po::= 0 Watts power supply

Shorted power supply Po = 0 Watts

Q3 disconnected from Po::: 0 Watts power supply


Q4 disconnected from Po ::: 0 Watts power supply


REV.

Date: 27 Jan 70

Engr.: C.S. -


y

1. 770 24

. 759 30

l. 770 24

. 759 30

l. 770 24

• 759 30

1. 770 24

. 759 30

1. 770 24

. 759 30 "d:;t> PI t-3

1. 770 24 ~ ~ w' -.J3; 0 """ . 759 30 ....,

""" --o


SYSTEM: A2 ALSEP



FL7 Open (. 70)

Short (. 30)

FL8 Open (. 70)

Short (. 30)

FL9 Open (. 70)

Short (. 30)

FLIO Open (. 70)

Short (.30)


DWG. NO.: 2344640 B


Effects of Failure


XMTR Preamplifier Po = 0 Watts disconnected from powe1 supply

Shorted Power Supply Po = 0 Watts

XMTR Modulator dis- Po = 0 Watts connected from power supply


XMTR Oscillator dis- Po = 0 Watts connected from power supply


Power Amplifier Po = 0 Watts disconnected from power supply


REV.

Date: 27 Jan 70

Eng r . :___::C:;..:•;..:s:;..:.:.__ __ _


Rank y

I. 770 24

. 759 30

I. 770 24

. 759 30

I. 770 24

. 759 30

I. 770 24

. 759 30

'"c:J> Ill 1-3 ~ ~ w' oo8; 0 *" ......

*" -.o


SYSTEM: A2 ALSEP


Part/ Component

SUB-ASSY: X6 Multiplier

DWG. NO.: 2344610 B

No. ATM 854


Effects of Failure

Symbol Failure Mode (FM) £l' Sub-Assembly End-Item

Cl Open {o 70} X6 multiplier presents Near total loss of major impedance mis- XMTR power output match to power amplifier (£>o < < 1 watt)

Short (. 30) Circuit signal path is Total loss of XMTR shorted power output

(Po = 0 watts)

C2 Open {o 70} Same as with C 1 open £>o << 1 watt)

Short (. 30) Same as with Cl short Po = 0 watts

C3 Open (. 70) Same as with Cl open Po<< 1 watt


C4 Open (. 70) Power amplifier Zo is £>a<< 1 watt greatly mismatched

Short (. 30) Same as with C 1 short Po = 0 watts

C5 Open (. 70) Same as with C4 open Po << 1 watt


C6 Open (. 70) Same as with C4 open Po << 1 watt -

Short (. 30) Same as with C 1 short Po = 0 watts

REV.

Date: 22 Jan 70

Engr.: C.S.

Probability of occurrence FM Unreliabili (a Q) x 10- 5 Rank

ty

• 920 26

• 395 32

. 920 26

. 395 32

. 920 26

. 395 32

• 920 26

. 395 32

• 920 26

. 395 32

.920 26 "d::t> IU 1-j

. 395 32 ~ ~ w' 00 -.D\Jl 0 ,j:>. ..... ..,.. -..{)


SYSTEM: A2 ALSEP SUB-ASSY: X6 Multiplier

END ITEM: Data Transmitter - ------ --------------- DWG. NO.: 2344610 B -

No. ATM 854

Mission Time: 8760 hrs. - ----- - - . - - --

Effects of Failure


C7 Open (. 70) Same as with C4 open Po<< l watt -

Short (. 30) Same as with C l short Po = 0 watts

CRl Open (. 10) Same as with Cl open Po<< l watt

Short (. 30) Same as with Cl short Po = 0 watts Drift (. 60) Cavity frequency slightly Slight change in Po

changed

CR2 Open (. l 0) Same as with C4 open Po<< l watt -Short (. 30) Same as with C 1 short Po = 0 watts

Drift (. 60) Same as with CRl - drift Slight change in Po

R1 Open (. 0 5) Renders Bias Varactor Po<< l Watt -Network No. 1 ineffective

R2 Open (. 05) Renders Bias Varactor _!>o < < 1 Watt 1

Network No. 2 ineffective Loss of TM power data

FLl Open (. 70\ Same as Rl open Po<< 1 Watt -

Short (. 30) Same as open mode Po<< 1 Watt

FL2 Open (. 70) Same as RZ open Po<< 1 Watt; Loss of TM power data

Short (. 30) Same as open ~o< < 1 Watt; L,oss of TNt power data

REV.

Date: 22 Jan 70

Engr 0 --

Probability of occurrence (aQ) x 10- 5

0 920

• 395

4.380 13. 140 26.280

4.380 13. 140 26.280

.037

.037

. 890

. 379

. 890

. 379

c.s

FM Unreliabilit y

Rank

26

32

17 6 2

17 6 2

41

41

27

33

27

33

'd Pl

(JQ

CD

*"' 0 0 .....,

*"' "'

;t> t-j

~ 00 \}1

*"'


SYSTEM: A2 ALSEP

END ITEM: Data Transmitter - ~

SUB-ASSY: X6 Multipler

DWG. NO.: 2344610 B


Effects of Failure

Part/ Component Symbol Failure Mode (FM) Q' Sub-Assembly End-Item

RVl (NTK #1) Open (. 05) Same as with R1 open Po<< l Watt

Drift (. 95) No effect No effect

RV2 (NTK #l) Open (. 05) Same as with R 1 open Po<< 1 Watt -


RV3(NTK #1) Open (. 0 5) Same as with R 1 open Po < < 1 Watt -


RV4 (NTK#2) Open (. 05) Same as with R2 open i_>o < < 1 Watt;

Loss of TM power data

Drift (. 95' No effect No effect

RV5 (NTK#2) Open (. 05) Same as with R2 open i_>o< < 1 Watt; Loss of TM power data


R2 (NTK #1) Open ( 0 9 5) Same as with R1 Open Po<< 1 Watt -

REV.

Date: 22 Jan 70 -------~

Engr c. s.

Probability of occurrence FM Unreliabili (aQ) x 10- 5 Rank

ty

. 657 31

12.483 7

• 657 31

12. 483 7

• 657 31

12.483 7

• 657 31

12.483 7

• 657 31

12.483 7

8. 114 11

1:/:X:. I» 1-j

~ ~ ~· 00 ,_.\.11

0 ~ ..... ~ -D


SYSTEM: A2 ALSEP SUB-ASSY: X6 Multiplier


No. ATM 854


Effects of Failure Part/ Component

Symbol

R4 (NTK #2)

R6 (NTK #2)

RS

Failure Mode (FM) Q'

Open (. 95)

Open (. 9 5)

Open (. 95)

Sub-Assembly

Same as with R2 open

Same as with R2 open

Bias Varactor #2 gets totally erroneous bias

End-Item

Po<< 1 Watt· - l

Loss of TM power data

Po<< 1 Watt, - I Loss of TM power data

fo < < 1 Watt •, TM power data becomes completely erroneous

REV.

Date: 22 Jan 70

Engr.: C. S.

Probability of occurrence (aQ) x 10-S

8. 114

8. 114

8. 114

FM Unreliability Rank

11

11

11

1:1:> Ill t-j

~ ~ ""'~ N\.11 0 ~ ...... ~ '-D


SYSTEM: A2 ALSEP



Rl Open

R2 Open

R3 Open

R4 Open

R5 Open

R6 Open

R7 Open

R8 Open

RIO Open

SUB-ASSY: Current Temp. & RF Power Telmy.

DWG. NO.: 2344664C


Effects of Failure


(. 95) ARl saturates; Total loss of RF Power TM Data

(. 95) AR I does not function as Total loss of Po a comparator; Eo = TM Data

. 55 vdc

(. 95) Same as with R2 open Total loss of Po TM Data

(. 05) ARLlooses bias voltages Total loss of Po Eo = 0 volts TM Data

(. 95) AR 1 is cut off as re- Total loss of Po gards power signals TM Data

(. 95) AR 1 can not sense Total loss of Po Power Signals TM Data

(. 95) RF Signal Path is open Total loss of Po TM Data

(. 9 5) AR 1 saturates Total loss of Po TM Data

(. 95) Power output level Total loss of Po sensor is lost TM Data

REV.

Date: 1-29-70

Engr.: C. S.


y

16.228 4

16.228 4

16.228 4

. 073 40

16.228 4

16.228 4

16.228 4

16.228 4

16.228 4

Rank

1:J Ill

(JQ (1)

,j::.. w 0 .... >+>--.!)

:;c. ~

~ 00 \.11 >+>-


SYSTEM: A2 ALSEP



Rll Open

R12 Open

R13 Open

Rl4 Open

RlS Open

Rl6 Open

Rl7 Open

SUB-ASSY: Current Temp. & RF Power Tlmy

DWG. NO.: 2344664C

No.ATM 854 Mission Time: 8760 hrs.

Effects of Failure


( l. 0) No effect Xmtr ground po-tential is . 8 vdc above TM ground instead of . 4 vdc; no effect

( l. 0) No effect Same as with R 11 open

(. 95) AR2 is saturated Total loss of Current TM Data

(. 95) AR2 does not function as Total loss of Currer a comparator TM Data

(. 05) AR2 looses bias voltages Total loss of Cur-Eo; 0 volts rent TM Data

(. 95) AR2 can not sense cur- Total loss of Cur-rent signals rent TM data

(. 95) AR2 saturates Total loss of Cur-rent TM data

REV.

Date: 1-29-70

Engr.: C. S.

Probability of occurrence FM Unreliabilit (aQ)xlO-S Rank

y

6.256 13

6.256 13

16.228 4

tl6. 228 4

. 073 40

16.228 4

16.228 4

1J> Ill 1-3

~ ~ ~· ~~ 0 ~

"'"" ~ -.!)


SYSTEM: A2 ALSEP



Rl8 Open

Rl9 Open

R21 Open

R22 Open

R23 Open

R24 Open

R25 Open

Fl Open

SB 7 thru 18 Bead Cracks

SUB-ASSY: Current Temp. & RF Power Tlmy.

DWG. NO.: 2344664C

No. ATM 854 Mission Time: R7h0 hr1'1 ........................ - ......

Effects of Failure


(. 95) AR2 saturates Total loss of Cur-rent TM Data

(. 95) AR2 saturates Total loss of Cur-rent TM Data

(. 95) AR2 Signal output level Total loss of Cur-sensor is lost rent TM Data

(. 95) Temp. #2 level sensor Total loss of Temp is lost #2 TM Data

(. 95) Temp. #2 sensor is Total loss of Temp inoperative (open path) #2 TM Data

(. 95) Temp. # 1 TM Sensor is Total loss of Temp inoperative (open path) #1 TM Data

(. 95) Temp. # 1 level sensor Total loss of Temp is lost #1 TM Data

( l. 00) Lose all telemetry power Total loss of all TM Data

No effect No effect (Beads are encap-sulated and still functional)

REV. A

Date: 15 June 70 _c_..:..___

Engr.: r c:: -

Probability of occurrence FM Unreliabilit y (aO) x 10- 5 Rank

16.228 4

16.228 4

16.228 4

16.228 4

16.228 4

16.228 4

16.228 4

87.60 lA

Nil 1:J PI

(JQ (!)

~ U1

0 ...... ~ -.£)

> t-3 ~ 00 U1 ~


SYSTEM: A2 ALSEP


Part/ Component Failure Mode (FJ) Symbol

CRI Open

Short

CR2 Open

Short

CR3 Open

Short

CR4 Open

Short

SUB-ASSY: Current, Temp. & RF Power Tlmy.

DWG. NO.: 2344664C


Effects of Failure


(. 10) AR 1 saturates Total loss of Po TM data

(. 3 0) ARl cut off Total loss of Po TM data

(. 10) No effect No effect

(. 30) ARl Eo is grounded Total loss of Po TM data

(. l 0) AR2 saturates Total loss of Curr-ent TM data

(. 30) AR2 Cut off Total loss of Cur-rent TM Data

(. 10) Current output signal Total loss of Cur-path is open rent TM data

(. 30) No significant effect No significant effect

REV.

Date: 1-29-70

Engr.: C. S.

Probability of occurrence FM Unreliabili (aO)xl0- 5

Rank ty

5.633 14

16.899 3

5.633 14

16. 899 3

5.633 14

16.899 3

1. 849 22

5.547 15

f-cJ> Ill t-3

~ ~ >~:>.b:, 0"\Jl 0 >~:>. ...... >~:>.

"'


SYSTEM: A2 ALSEP



CRS Open

Short

CR6 Open

Short

CR7 Open

Short

ARl Open

Short

Drift

SUB-ASSY: Current, Temp. & RF Power Tlmy

DWG. NO.: 2344664C


Effects of Failure



(. 3 0) Current signal output Total loss of Cur-is shorted rent TM data


(. 3 0) Temp #2 TM data are Total loss of shorted to ground Temp #2 TM data


(. 30) Temp #1 TM data are Total loss of Temp shorted to ground #1 TM data

(. 50) Loss of Po TM functions Total loss of Po TM data

(. 30) Same effect as open Total loss of Po TM data

(. 20) Minor loss in circuit Minor loss in Po sensitivity TM data accuracy

REV.

Date: l-29-70

Engr.: C. S.


y

5.633 14

16. 899 3

5.633 14

16.899 3

5.633 14

16.899 3

5.256 16

3.454 19

2. 102 21

1:J;t> PI 1-j

~ ~ ..j::.l --.)00

U1 0 ..j::. ...... ..j::.

"'


SYSTEM: A2 ALSEP


Part/ Component Symbol Failure Mode (MF)

AR2 Open

Short

Drift

RTl (Deleted)


DWG. NO.: 2344664C

No. ATM-854


Effects of Failure


(.50 Loss of Current TM Total loss of functions current TM data

(. 30) Same as open Total loss of current TM data

(. 20) Minor loss in circuit Minor loss in

sensitivity current TM data accuracy

REV. A

Date: 6/15/70

Engr.: C. S.

Probability of occurrence FM Unreliabilit (aO)xlO-S Rank

y

5.256 16

3.454 19

2. 102 21

11> Ill 1-3

a;; ~ ,j::..l

00~ 0 ,j::.. ......

""" -.o


SYSTEM: A2 ALSEP



RT1 (Deleted)

RT2 Open

Short

Drift


No. ATM 854 Mission

DWG. NO.: 2344664C Time: 8760 hrs.

Effects of Failure

Q Sub-Assembly End-Item

(.50) Same as R24 open Total loss of Temp. #1 TM Data

(. 25) Same as open Total loss of Temp. #1 TM Data


REV. A

6/15/70 Date: __ ....:._ ___ _

Engr.: C. S.

Probability of occurrence FM Unreliabilit (a0)x10-S Rank

y

13. 140 6

6.470 12A

6.570 l2A

1:l:X:. Ill t-3 ~ ~ ~· ...000

\Jl 0 ~ 1-+,

~ --0

PAGE OF Division DATE - Lunar and Planetary Institute · Systems Division DATE 2/5/70 4. 0...

Documents

Transcript of PAGE OF Division DATE - Lunar and Planetary Institute · Systems Division DATE 2/5/70 4. 0...