Page 1
SERVICE MANUALBPM-1
PROFESSIONAL AUTOMATIC BEAT COUNTER
CONTENT’S:Connections & Operations:.......................................................Page 2-3
Specifications:..............................................................................Page 3
Parts Lists:.................................................................................Page 3-4
PCBs:..........................................................................................Page 5-6
Schematics:..................................................................................Page 7
Gemini Sound Products Corp.120 Clover Place P.O. Box 6928
Edison, NJ 08818-6928732-738-9003 (Phone) • 732-738-9006 (Fax)
Page 2
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2019
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54 4
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8
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Page 3
Connections1. Make sure that the POWER (13) switch is in the off position. The
POWER LED (14) will be off. This unit comes supplied with a 15 voltAC adaptor. Plug the adaptor into the rear panel power jack. Then plugthe adaptor into a proper power source.
2. Use the 4 stereo PHONO/LINE (2, 5, 8, 11) inputs on the rear panel toconnect to the output of your sources. The PH1/LN1 (12) switchenables you to set the CHANNEL 1 (11) input sensitivity to Phono orLine. The PH2/LN2 (9) switch enables you to set the CHANNEL 2 (8)input sensitivity to Phono or Line. The PH3/LN3 (6) switch enables youto set the CHANNEL 3 (5) input sensitivity to Phono or Line. The PH4/LN4 (3) switch enables you to set the CHANNEL 4 (2) input sensitivityto Phono or Line. Note: When using turntables, don’t forget to connectthe ground wire from your tuntable to the ground screw of your mixer.
3. The BPM-1 is supplied with 4 sets of OUTPUT (1, 4, 7, 10) jacks. If youare using a turntable and have the input set to phono, thecorresponding output must be connected to phono inputs on yourmixer. If you have the input set to line, the corresponding output mustbe connected to line inputs on your mixer. Use the CHANNEL 1OUTPUT (10) jacks to connect to the appropriate inputs on your mixer.Use the CHANNEL 2 OUTPUT (7) jacks to connect to the appropriateinputs on your mixer. Use the CHANNEL 3 OUTPUT (4) jacks toconnect to the appropriate inputs on your mixer. Use the CHANNEL 4OUTPUT (1) jacks to connect to the appropriate inputs on your mixer.
Operation1. POWER ON: Once you have made all the equipment connections, press
POWER (13). The power will turn on and the POWER LED (14) willglow RED. When you turn on the BPM-1, the unit will run through aninitialization period in which the BPM DISPLAYS (17, 19) and the BEATOFFSET INDICATORS (18) will flash. When the flashing stops, the unitis ready for use.
2. The ASSIGN (16, 21) buttons allow you to select which channel will bedisplayed on each side of the BPM-1. Press the ASSIGN (16) button toselect channel 1, 2, 3 or 4 to be displayed on the left BPM DISPLAY(17). The ASSIGN LED (15) will indicate the channel you selected.Press the ASSIGN (21) button to select channel 1, 2, 3 or 4 to bedisplayed on the right BPM DISPLAY (19). The ASSIGN LED (20) willindicate the channel you selected.
3. BPM DISPLAY: There are BPM DISPLAYS (17, 19) for each side of theBPM-1. They update approximately every 2.5 seconds and digitallydisplay the Beats Per Minute allowing you to match the beats visually.BPM DISPLAY (17) reflects the Beats Per Minute of the channelassigned to the left side of the unit, and BPM DISPLAY (19) reflectsthe Beats Per Minute of the channel assigned to the right side of theunit.
NONONONONOTETETETETE: A [- -] reading will appear on the BPM DISPLAY if thetrack has unclear beats. The [- -] reading will also appear ifthere is no signal present.
4. The BEAT OFFSET INDICATORS (18) light when the tracks of the twochannels assigned to the crossfader are within 11 BPMs of each otherand display how aligned the beats of the two channels are. When theRED LEDs light, the beats are not aligned. When the YELLOW LEDslight, the beats are almost aligned. When the GREEN LED lights, thebeats are aligned perfectly.
NONONONONOTETETETETE: If the difference between the two channel’s beatsexceed 11 BPM, the BEAT OFFSET INDICATORS will notlight.
SUGGESTION: You can use the BPM DISPLAYS to determine whichtracks have similar or the same Beats Per Minute. When mixing two trackswith similar Beats Per Minute, you can use one source’s pitch control toalign the Beats Per Minute with the other source’s BPM. The BPMDISPLAYS and the BEAT OFFSET INDICATORS update every 2.5seconds and will reflect the change in BPM and indicate when the beatsare aligned.
NONONONONOTETETETETE: Beat mixing is a skill that requires practice. Notevery track has a strong beat, and beat mixing works bestwith tracks that have clear and strong beats.
Specifications
INPUTS:Phono......................................................................................3 mV 3 MOhmLine.....................................................................................150 mV 3 MOhm
OUTPUTS:Input/Output Resistance..................................................................<0.1 OhmGENERAL:BPM Range.............................................................................60 - 180 BPMPower Adapter...........................................................115V/15V AC 500 mA
230V/15V AC 500 mADimensions......................................19”w x 1.75”h x 3”d (483 x 44 x 78 mm)Weight.....................................................................................3 lbs (1.5 kg)
Description Part #
Cabinet Parts and Packing
123456789
101112131415
Item #
Parts Lists
031-032021-461002-571003-732003-372049-190196-061255-131157-962110-166121-003A110-172A111-044A111-046A131-057
CASECHASSISKNOB PUSHHOLDER LED (3ø 6.5mm)PLATE DISPLAY (SMALL)CLIP WIRESERIAL NO. LABELGIFT BOXOWNER’S MANUALBAND-HEAD TAPPING SCREW (TWIN)BAND-HEAD TAPPING SCREW/TW-EBAND-HEAD TAPPING SCREW (TWIN)BAND-HEAD TAPPING SCREW ( “NUT” )BAND-HEAD TAPPING SCREWNUT/WASHER
262-239262-240
PRINTED CIRCUIT BOARD BPM1-1PRINTED CIRCUIT BOARD BPM1-2
Description Part #
Printed Circuit BoardsItem #
12
Page 4
074-155074-157
INTEGRATED CIRCUIT M66313FPINTEGRATED CIRCUIT SC87C51CCN40
IC5IC1
Designators Description Part #
ICsItem #
12
Parts Lists - Meter PCB
079-027079-003161-169081-027
RECTIFIER DIODE 1N4002 (1N4003,1N4004)SILICON DIODE 1N41484P RCA JACKSLIDE SWITCH 2P2C PH/LN
D18D8-10, D12-14J1-4SW1-4
Designators Description Part #
Electrical PartsItem #
1234
074-011074-074
INTEGRATED CIRCUIT UPC324INTEGRATED CIRCUIT NJM7805FA
IC2, IC3, IC4, IC8IC7
Designators Description Part #
ICsItem #
12
Parts Lists - Main PCB
080-102080-003
080-062080-063082-041052-018
LED NUMERIC DISPLAYLIGHT EMITTING DIODE (RED) 3ø
LIGHT EMITTING DIODE (YELLOW) 3øLED (GREEN) 3øTACT SWITCHCERAMIC RESONATOR 12 MHz
A, BD1-2, D6-7, D20-27, D30D3, D5D4SWA, SWBXT1
Designators Description Part #
Electrical PartsItem #
12
3456
Page 1
SERVICE MANUALBPM-1
PROFESSIONAL AUTOMATIC BEAT COUNTER
CONTENT’S:Connections & Operations:.......................................................Page 2-3
Specifications:..............................................................................Page 3
Parts Lists:.................................................................................Page 3-4
PCBs:..........................................................................................Page 5-6
Schematics:..................................................................................Page 7
Gemini Sound Products Corp.120 Clover Place P.O. Box 6928
Edison, NJ 08818-6928732-738-9003 (Phone) • 732-738-9006 (Fax)
Page 2
1718
21
2019
21 1
2
3
54 4
5
6
87 7
8
9
1110 10
11
12
13
14
16
15
Page 3
Connections1. Make sure that the POWER (13) switch is in the off position. The
POWER LED (14) will be off. This unit comes supplied with a 15 voltAC adaptor. Plug the adaptor into the rear panel power jack. Then plugthe adaptor into a proper power source.
2. Use the 4 stereo PHONO/LINE (2, 5, 8, 11) inputs on the rear panel toconnect to the output of your sources. The PH1/LN1 (12) switchenables you to set the CHANNEL 1 (11) input sensitivity to Phono orLine. The PH2/LN2 (9) switch enables you to set the CHANNEL 2 (8)input sensitivity to Phono or Line. The PH3/LN3 (6) switch enables youto set the CHANNEL 3 (5) input sensitivity to Phono or Line. The PH4/LN4 (3) switch enables you to set the CHANNEL 4 (2) input sensitivityto Phono or Line. Note: When using turntables, don’t forget to connectthe ground wire from your tuntable to the ground screw of your mixer.
3. The BPM-1 is supplied with 4 sets of OUTPUT (1, 4, 7, 10) jacks. If youare using a turntable and have the input set to phono, thecorresponding output must be connected to phono inputs on yourmixer. If you have the input set to line, the corresponding output mustbe connected to line inputs on your mixer. Use the CHANNEL 1OUTPUT (10) jacks to connect to the appropriate inputs on your mixer.Use the CHANNEL 2 OUTPUT (7) jacks to connect to the appropriateinputs on your mixer. Use the CHANNEL 3 OUTPUT (4) jacks toconnect to the appropriate inputs on your mixer. Use the CHANNEL 4OUTPUT (1) jacks to connect to the appropriate inputs on your mixer.
Operation1. POWER ON: Once you have made all the equipment connections, press
POWER (13). The power will turn on and the POWER LED (14) willglow RED. When you turn on the BPM-1, the unit will run through aninitialization period in which the BPM DISPLAYS (17, 19) and the BEATOFFSET INDICATORS (18) will flash. When the flashing stops, the unitis ready for use.
2. The ASSIGN (16, 21) buttons allow you to select which channel will bedisplayed on each side of the BPM-1. Press the ASSIGN (16) button toselect channel 1, 2, 3 or 4 to be displayed on the left BPM DISPLAY(17). The ASSIGN LED (15) will indicate the channel you selected.Press the ASSIGN (21) button to select channel 1, 2, 3 or 4 to bedisplayed on the right BPM DISPLAY (19). The ASSIGN LED (20) willindicate the channel you selected.
3. BPM DISPLAY: There are BPM DISPLAYS (17, 19) for each side of theBPM-1. They update approximately every 2.5 seconds and digitallydisplay the Beats Per Minute allowing you to match the beats visually.BPM DISPLAY (17) reflects the Beats Per Minute of the channelassigned to the left side of the unit, and BPM DISPLAY (19) reflectsthe Beats Per Minute of the channel assigned to the right side of theunit.
NONONONONOTETETETETE: A [- -] reading will appear on the BPM DISPLAY if thetrack has unclear beats. The [- -] reading will also appear ifthere is no signal present.
4. The BEAT OFFSET INDICATORS (18) light when the tracks of the twochannels assigned to the crossfader are within 11 BPMs of each otherand display how aligned the beats of the two channels are. When theRED LEDs light, the beats are not aligned. When the YELLOW LEDslight, the beats are almost aligned. When the GREEN LED lights, thebeats are aligned perfectly.
NONONONONOTETETETETE: If the difference between the two channel’s beatsexceed 11 BPM, the BEAT OFFSET INDICATORS will notlight.
SUGGESTION: You can use the BPM DISPLAYS to determine whichtracks have similar or the same Beats Per Minute. When mixing two trackswith similar Beats Per Minute, you can use one source’s pitch control toalign the Beats Per Minute with the other source’s BPM. The BPMDISPLAYS and the BEAT OFFSET INDICATORS update every 2.5seconds and will reflect the change in BPM and indicate when the beatsare aligned.
NONONONONOTETETETETE: Beat mixing is a skill that requires practice. Notevery track has a strong beat, and beat mixing works bestwith tracks that have clear and strong beats.
Specifications
INPUTS:Phono......................................................................................3 mV 3 MOhmLine.....................................................................................150 mV 3 MOhm
OUTPUTS:Input/Output Resistance..................................................................<0.1 OhmGENERAL:BPM Range.............................................................................60 - 180 BPMPower Adapter...........................................................115V/15V AC 500 mA
230V/15V AC 500 mADimensions......................................19”w x 1.75”h x 3”d (483 x 44 x 78 mm)Weight.....................................................................................3 lbs (1.5 kg)
Description Part #
Cabinet Parts and Packing
123456789
101112131415
Item #
Parts Lists
031-032021-461002-571003-732003-372049-190196-061255-131157-962110-166121-003A110-172A111-044A111-046A131-057
CASECHASSISKNOB PUSHHOLDER LED (3ø 6.5mm)PLATE DISPLAY (SMALL)CLIP WIRESERIAL NO. LABELGIFT BOXOWNER’S MANUALBAND-HEAD TAPPING SCREW (TWIN)BAND-HEAD TAPPING SCREW/TW-EBAND-HEAD TAPPING SCREW (TWIN)BAND-HEAD TAPPING SCREW ( “NUT” )BAND-HEAD TAPPING SCREWNUT/WASHER
262-239262-240
PRINTED CIRCUIT BOARD BPM1-1PRINTED CIRCUIT BOARD BPM1-2
Description Part #
Printed Circuit BoardsItem #
12
Page 4
074-155074-157
INTEGRATED CIRCUIT M66313FPINTEGRATED CIRCUIT SC87C51CCN40
IC5IC1
Designators Description Part #
ICsItem #
12
Parts Lists - Meter PCB
079-027079-003161-169081-027
RECTIFIER DIODE 1N4002 (1N4003,1N4004)SILICON DIODE 1N41484P RCA JACKSLIDE SWITCH 2P2C PH/LN
D18D8-10, D12-14J1-4SW1-4
Designators Description Part #
Electrical PartsItem #
1234
074-011074-074
INTEGRATED CIRCUIT UPC324INTEGRATED CIRCUIT NJM7805FA
IC2, IC3, IC4, IC8IC7
Designators Description Part #
ICsItem #
12
Parts Lists - Main PCB
080-102080-003
080-062080-063082-041052-018
LED NUMERIC DISPLAYLIGHT EMITTING DIODE (RED) 3ø
LIGHT EMITTING DIODE (YELLOW) 3øLED (GREEN) 3øTACT SWITCHCERAMIC RESONATOR 12 MHz
A, BD1-2, D6-7, D20-27, D30D3, D5D4SWA, SWBXT1
Designators Description Part #
Electrical PartsItem #
12
3456
Page 5
Main PCB
Page 6
Meter PCB
Schematic
POWER
POWER
SW5
X8X7
X4
2
1
J10
MAIN PCB
METER PCB
563
C33
563
C32
X1
2
1
332
C56
332
C1
b2bb2f
b2ab2gb3cb3bb3fb3ab3ga2fa2ba3ba3fa3aa3ga2aa2ga3da3e
b2cb2eb2db1b,1cb3db3ea2ca2ea2da1b.1c
a3c
VCC
CH ACH B
R
L
VCC
LEDD30
750R121
X12
2 1
X11
2 1
21
VCC
104C101
104
C100
P27
P26
P25
P24
P23
P22
P21
P27P26P25P24P23P22P21
VCC
510R120
LED4B
LED3B
LED2B
LED1B
LED1A
LED2A
LED3A
LED4A
LED4BLED3BLED2BLED1BLED1ALED2ALED3ALED4A
VCC
510R119
LED
D27
LED
D26
LED
D25
LED
D24
LED
D23
LED
D22
LED
D21
LED
D20
VCC
SWB
SWA
SWA
SWB
SWB
SWA
A4
A3
A2
A1
B4
B3B2
B1
B4B3B2B1 A4A3A2A1
X3
VCC
470
R78
470
R77
470
R76
240R80
470
R75
470
R74
470
R73
470
R72
470
R71
470
R70
240
R79
470
R69
470
R68
470
R67
470
R66
470
R65
470
R64
470
R63
470
R62
470
R61
470
R60
470
R59
470
R58
470
R57
470
R56
470
R55470
R54
470
R53
470
R52
470
R51
M66313FP
IC5
10OE
14SQ32
13CK
9A
11LE
12SD
20Q32
19Q31
18Q30
17Q29
16Q28
15Q27
22Q26
23Q25
24Q24
25Q23
26Q22
27Q21
28Q20
29Q19
30Q18
31Q17
33Q16
34Q15
35Q14
36Q13
37Q12
38Q11
39Q10
40Q9
41Q8
42Q7
7Q6
6Q5
5Q4
4Q3
3Q2
2Q1
VCC
32
31
30
2928
27
26
25
24
23
22
2019
18
15
14
13
1211
10
9
8
7
6
54
3
2
1
32
3130
29 2827
2625 24 23
2221 20
19 18
15
1413
12 1110
98 7 6
54 3
2 1
BT-A41B
1b
1c
3g3f
3e3d
3c
3b3a
2g2f
2e2d
2c
2b2a
BT-A41A
1b
1c
3g3f
3e3d
3c
3b3a
2g2f
2e2d
2c
2b2a
510R10
LED
D7
LED
D6
LED
D5
LED
D4
LED
D3
LED
D2
LED
D1
VCC
VCC
10KR1
10/10C11
47pFC10
47pFC9
12MXT1
8051
IC1
10RXD
11TXD
30ALE/P
29PSEN
28P27
27P26
26P25
25P24
24P23
23P22
22P21
21P20
32P07
33P06
34P05
35P04
36P03
37P02
38P01
39P00
8P17
7P16
6P15
5P14
4P13
3P12
2P11
1P10
15T1
14T0
13INT1
12INT0
16WR
17RD
9RESET
18X2
19X1
31EA/VP
1N4004
D18
X63 2 1
SW4A1
32
SW3A1
32
SW2A1
32
SW1A1
32
AB
AB
B
A
1/2VCC
1/2VCC
SW4B4
65
47/10
C43
682
C31
300K
R88
240R118
300K
R87
SW3B4
65
47/10
C42
682
C30
300K
R86
240R117
300K
R85
SW2B4
65
47/10
C41
682
C29
300K
R84
240R116
300K
R83
J4B
2G
2R
2L
J4A
1G
1R
1L
J3B
2G
2R
2L
J3A
1G
1R
1L
VCCX5 2 1
VCC
OA4
IC8D
411
1413
12
OA4
IC8C
411
89
10
OA4
IC8B
411
75
6
OA4
IC8A
411
13
2
R4R3R2R1 L4L3L2L1
R4
R3
R2
R1
L4
L3
L2
L1
CH4
CH3
CH2
CH1
470/25C38
1/2VCC
470/10
C406K2R9
10KR8
VCC
1.0/10C36
7805IC7
3Vout
2GN
D
1Vin
X2
4.7/25
C55
4.7/25
C54
1/2VCC
1/2VCC
100K
R115
100K
R114
100K
R113
100KR112
100K
R111
100KR110
1/2VCC
3M3
R96
3M3
R95
J2B
2G
2R
2L
100K
R109
100KR108
100K
R107
100KR106
1/2VCC
3M3
R94
3M3
R93
J2A
1G
1R
1L
100K
R105
100KR104
100K
R103
100KR102
1/2VCC
3M3
R92
3M3
R91
J1B
2G
2R
2L
100K
R101
100KR100
100K
R99
100KR98
1/2VCC
SW1B4
65
47/10
C39
682
C28
300K
R82
240R97
3M3
R90
3M3
R89
300K
R81J1A
1G
1R
1L
Vcc
100KR40
5K1R48
6K2R6
1K1R46
330KR43
100KR39
10KR5
1MR36
470KR34
104
C19471
C27
2.2/16C25
4.7/10C23
1N4148
D15
1N4148
D14
1N4148
D13
1N4148
D12
47/6.3C3 22K
R32
22KR31
1K
R18
6.8K
R28
68KR26
680KR24
181
C21
104
C18
104C17
104
C16
Vcc
91KR22
1KR16
9.1K
R20
LM324A
IC4D
411
1413
12
LM324A
IC4C
411
89
10LM324A
IC4B
411
75
6
LM324A
IC4A
411
13
2
LM324A
IC3D
411
1413
12
LM324A
IC3C
411
89
10
Vcc
100KR38
330KR41
100KR37
10KR2
1MR35
470KR33
104
C15471
C26
2.2/16C24
4.7/10C22
1N4148
D11
1N4148
D10
1N4148
D9
1N4148
D8
47/6.3C2 22K
R30
22KR29
1K
R14
6.8K
R27
68KR25
680KR23
181
C20
104
C14
104C13
104
C12
Vcc
91KR21
1KR12
9.1K
R19
LM324A
IC3B
411
75
6
LM324A
IC3A
411
13
2LM324AIC2D
411
1413
12
LM324A
IC2C
411
89
10
LM324A
IC2B
411
75
6
LM324A
IC2A
411
13
2
104C8
104C7
104C6
104C5
104C4
VCC
Worldwide Headquarters • 120 Clover Place, Edison, NJ 08837 • USATel: (732) 738-9003 • Fax: (732) 738-9006
France • G.S.L. France • 11, Avenue Leon Harmel, Z.I. Antony, 92160 Antony, FranceTel: + 33 (0) 1 55 59 04 70 • Fax: + 33 (0) 1 55 59 04 80
Germany • Gemini Sound Products GmbH • Ottostrasse 6, 85757 Karlsfeld, GermanyTel: 08131 - 39171-0 • Fax: 08131 - 39171-9
UK • Gemini Sound Products • Unit C4 Hazleton Industrial Estate, Waterlooville, UK P08 9JUTel: 087 087 00880 • Fax: 087 087 00990
Spain • Gemini Sound Products S.A. • Rosello, 516, Barcelona, Spain, 08026Tel: 349-3435-0814 • Fax: 3493-347-6961
© Gemini Sound Products Corp. 2002 All Rights Reserved
Parts of the design of this product may be protected by worldwide patents.Information in this manual is subject to change without notice and doesnot represent a commitment on the part of the vendor. Gemini SoundProducts Corp. shall not be liable for any loss or damage whatsoeverarising from the use of information or any error contained in this manual.No part of this manual may be reproduced, stored in a retrieval system ortransmitted, in any form or by any means, electronic, electrical, mechanical,optical, chemical, including photocopying and recording, for any purposewithout the express written permission of Gemini Sound Products Corp.It is recommended that all maintenance and service on this product isperformed by Gemini Sound Products Corp. or its authorized agents.Gemini Sound Products Corp. will not accept liability for loss or damagecaused by maintenance or repair performed by unauthorized personnel.
In the USA: If you experience problems with this unit,call 1-732-738-9003 for Gemini Customer Service.
Do not attempt to return this equipment to your dealer.
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