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7/21/2019 pb700sch.pdf
http://slidepdf.com/reader/full/pb700schpdf 1/8
LCD boost converter
2
3
4
1
D4
LCD voltage regulator
D9
D8
D7
D6
D5
Q9
Q8
Q1
Q2
Q14
Q16
Q15
VR3
Q11Q10 VR1
1112IC10
supply voltage monitor
p
3
4
10
1
2
6
5
9
8
IC8
IC8
IC8IC8
IC1015 14
RAM supp
Q7
11IC7
64
5
VDD1
D1
Q5
VR2
D2Q6
D3
Q3
Q4
main voltage regulatorRAM backup voltage
12
13
R1
R2
R3
R4
R5 R6
R7
R8
R9
R10
R11
R12
R13
R14
R15 R16
R18R19 R20
R21
R22 R23 R24
R25
C1C2
C3
C4 C5C6
C7
C9
C10C11
C12
IC6 IC7 IC8 IC10
R26
14
7
14
7
14
7
1
8
-20V
-4.5V
GND
VDD
VDD
7/21/2019 pb700sch.pdf
http://slidepdf.com/reader/full/pb700schpdf 2/8
D 0 D 1 D 2 D 3 I N T K M K 1 2
K 1 1
K 1 0
K 9 K 8 K 7 K 6 K 5 K 4 K 3 K 2 K 1 S W
OSO
OSI
GND
CE2
CE1
VDD
VDD’
Ø1
Ø2
OP
GND
GND
VDD
bus
D 0 D 1 D 2 D 3 I N T K M K 1 2
K 1 1
K 1 0
K 9 K 8 K 7 K 6 K 5 K 4 K 3 K 2
GND
CE2
CE1
VDD
VDD’
Ø1
Ø2
OP
GND
VDD
bus
IC1 IC2
3 4 5 6 7 8 9 10 11 12 13 14 15 16
IC10 IC10
Q12 Q13
9 10 3 2
IC10
F A U L T
B U S Y
D 3
D 2
D 1
D 0
Ø 2
Ø 1
O P
I N I T
M T C S
P L C E
V M
IC6
IC6
IC6
IC10
IC6IC7
IC7IC7
C E 2
8
9
10
1112
13
21
17
31
2
45
6
32
1
1112
13
10
8
9
GND
GND
GNDbus
VDD
IC8/13 IC8/12R27
R28
R29
R31 R32
R33
R34
R35R36
R37
R38
R39R40
R41 R42 R43 R44 R45 R46 R47
C14 C15C16
C17
C18
C19
G N D
F G
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
expansion port
4 5 6 72 1
7/21/2019 pb700sch.pdf
http://slidepdf.com/reader/full/pb700schpdf 3/8
G N D
C E V D D 1
V D D 2
Ø 1 Ø 2 O P D 0 D 1 D 2 D 3
INT
D C
V 4
V 3
V 2
V 1
R / W B
L 4
B L 3
B L 2
B L 1
G N D
C E V D D 1
V D D 2
Ø 1 Ø 2 O P D 0 D 1 D 2 D 3
INT
D C
V 4
V 3
V 2
V 1
R / W B
L 4
B L 3
B L 2
B L 1
G N D
C E V D D 1
V D D 2
Ø 1 Ø 2 O P D 0 D 1 D 2 D 3
INT
D C
V 4
V 3
V 2
V 1
R / W B
L 4
B L 3
B L 2
B L 1
G N D
C E V D D 1
B L 3
B L 2
B L 1
IC4 IC3 IC5
V 3
G N D
V D D 1
Ø 1
O P
D 1
I N T
V 4
C E
V D
D 2
Ø
2
D 0
D 2
D 3
V 3
G N D
V D D 1
Ø 1
O P
D 1
I N T
V 4
C E
V D
D 2
Ø
2
D 0
D 2
D 3
V 3
G N D
V D D 1
Ø 1
O P
D 1
I N T
V 4
C E
V D
D 2
Ø
2
D 0
D 2
D 3
X1 X2
VDD1
VDD2
CE1
Ø1
Ø2
OP
D0
D1
D2
D3
INT
VDD1Ø1
OP
D1
INT
CE1
VDD2Ø2
D0
D2
D3
R48
R49
R50
R51
R52
R53
R54
R55
R56
R57
INT
CE1
C20
C21
GND
GND
GND
GND
b u s
7/21/2019 pb700sch.pdf
http://slidepdf.com/reader/full/pb700schpdf 4/8
" E D C W S X Q A Z
= ) T G B ( R F V
: U J M , Y H N
ENTER . 0 + 3 2 1
P O L I K
/ * - 9 6
8 5 7 4
DEL
ANS CLS
CAPS SPC
BRK
SHIFT
↵
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
buzzer K13 K12 K11 K10 K9 K8 K7 K6 K5 K4 K3 K2 K1
R58 R59 R60 R61 R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R72
R73
16 17 18 19 20 21 22 23 24 25
1 2 3 4 5 6 7 8 9
to the LCD board
on
off
p o w e r s w i t c h
V D D
L C D_ o n
V L C D 2
V L C D 1
L C D_ C E Ø1 Ø2 OP D0
keyboard matrix
to the CPU board
7/21/2019 pb700sch.pdf
http://slidepdf.com/reader/full/pb700schpdf 5/8
C 0 1
C 0 2
C 0 3
C 0 4
C 0 5
C 0 6
C 0 7
C 0 8
C 0 9
C 1 0
C 1 1
C 1 2
C 1 3
C 1 4
C 1 5
C 1 6
C 1 7
C 1 8
C 1 9
C 2 0
C 2 1
C 2 2
C 2 3
C 2 4
C 2 5
C 2 6
C 2 7
C 2 8
C 2 9
C 3 0
C31
C32
C33
C34
C35
C36
C37
C38
C39
C40
C41C42
C43
C44
C45
C46
C47
C48C49
C 5 0
C 5 1
C 5 2
C 5 3
C 5 4
C 5 5
C 5 6
C 5 7
C 5 8
C 5 9
C 6 0
C 6 1
C 6 2
C 6 3
C 6 4
C 6 5
C 6 6
C 6 7
C 6 8
C 6 9
C 7 0
C 7 1
C 7 2
C 7 3
C 7 4
C 7 5
C 7 6
C 7 7
C 7 8
C 7 9
C80
V C C
V 1
V 2
V 3
V 4
V 5
V R E F
G N D
DO
DF
CP2
CP1
V5
V3
V2
CE
Ø1
Ø2
OP
D0
D1
D2D3
14
13
12
11
10
9
8
7
6
5
4
3
2
1
FG
LC
V
V
LC
Ø
Ø
O
D
D
D
D
serial datadisplay frequency, frame alternating signal
bi-phase clock signalbi-phase clock signal
D I
D F
C P 1
C P 2
G
V
R01
R02
R03
R04
R05
R06
R07
R08
R09
R10
R11
R12
R13
R14
R15
R16R17
R 1 8
R 1 9
R 2 0
R 2 1
R 2 2
R 2 3
R 2 4
R 2 5
R 2 6
R 2 7
R 2 8
R 2 9
R 3 0
R 3 1
R 3 2
R 0 1
R 0 2
R 0 3
R 0 4
R 0 5
R 0 6
R 0 7
R 0 8
R 0 9
R 1 0
R 1 1
R 1 2
R 1 3
R 1 4
R15R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
R32
right side left side
IC11
IC12
column driver
row driver
V 5
V 4
V 1
IC13
Q17
R74
R75
R76 910kHz
R77
R78
R79
C22
C23 C24 C
C26 C27
C28
C29
7/21/2019 pb700sch.pdf
http://slidepdf.com/reader/full/pb700schpdf 6/8
+
IC1 IC2
IC6IC7
IC8
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8Q9
D1
D2
D3
VR1
VR2
R1
R2 R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R18
R21
R26
C1
C4
C5
C9
C12
C13
R27
R28
R29
R30
R31R32
R33R34 R37 R38R41
C17
C18
R53R54
R55 R56 R57
C
7/21/2019 pb700sch.pdf
http://slidepdf.com/reader/full/pb700schpdf 7/8
+ +
+
1 2 3 5 10 15 20 25 30
b u z z e r
K 1 3
K 1 2
K 1 1
K 1 0
K 9
K 8
K 7
K 6
K 5
K 4
K 3
K 2
K 1
p o w e r s w i t c h
L C D_ o n
V D D
V L C D 2
V L C D 1
L C D_ C E
Ø 1
Ø 2
O P
D 1
D 2
D 3
D 4
G N D
F G
IC10
+
Q10
Q11
Q12 Q13
D4
D5
R19
R20
R22
R23
R24
R25
C2
C3
C6
C7
C11
R35
R36
R39
R40
R42
R43 R44
R45
R46R47 C14
C15
C16
C19
X1 X2
7/21/2019 pb700sch.pdf
http://slidepdf.com/reader/full/pb700schpdf 8/8
Parts list
IC1 HD61917A06
IC2 HD61917A07
IC3 HD61914C
IC4 HD61914C
IC5 HD61914CIC6 TC4071BF
IC7 TC40H000F
IC8 TC4071BF
IC9 HD61914C
IC10 TC50H000F
IC11 M6225
IC12 M6226-01K
IC13 LA5310
Q1 2C1623
Q2 2A812
Q3 2A812
Q4 2C1623
Q5 2A812
Q6 2C1623
Q7 2A812
Q8 2A812
Q9 2A812
Q10 2A812
Q11 2A812
Q12 2A812
Q13 2A812
Q14 2A812
Q15 2A812
Q16 2A812Q17 2C1623
D1 r!" L#D
D2 11588
D3 11588
D4 $!%!r 20&
D5
D6 11588
D7 11588
D8 11588
D9 11588
&'1 20()
&'2 50()
&'3 220()
&'4 100()
'1 100)
'2 2*2M)
'3 120()
'4 150()
'5 150()
'6 68()
'7 47()
'8 270()
'9 1()
'10 33()
'11 15()
'12 15()
'13 680()
'14 120()
'15 270()'16 470()
'17 180()
'18 120()
'19 10()
'20 470()
'21 680()
'22 330()
'23 220()
'24 270()
'25 39()
'26 56)
'27 56)
'28 56()
'29 56)
'30 56()
'31 15()
'32 15()
'33 680()
'34 680()
'35 330()
'36 22()
'37 680()
'38 680()
'39 330()
'40 22()'41 3*9()
'42 3*9()
'43 3*9()
'44 3*9()
'45 3*9()
'46 3*9()
'47 3*9()
'48 2*2()
'49 2*2()
'50 2*2()
'51 2*2()
'52 2*2()'53 2*2()
'54 2*2()
'55 2*2()
'56 2*2()
'57 2*2()
'58 100)
'59 100)
'60 4*7()
'61 4*7()
'62 4*7()
'63 4*7()
'64 4*7()
'65 4*7()
'66 4*7()
'67 4*7()
'68 4*7()
'69 4*7()
'70 4*7()
'71 4*7()
'72 4*7()'73 150()
'74 56)
'75 56)
'76 2*2M)
'77 100)
'78 100()
'79 47()
C1 0*33+F
C2 22+F
C3 22+F
C4
C5
C6 3*3+F
C7 33+F
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29