Casio PCR-255 Service Manual page 17

A B
4 5
GNDP VP
1
IC4
LB1268
VP
PKM22EPT-2001
DTC143ZS
2
GNDP
VP
WD2
HE40TKYB221K
3
LB1268
7 2
WD1
CRH100-FH11J-10R
1K
4
PR8
PR7
1K
PR6
1K
PR5
2200P X3
GNDP GND
DSTC50TKYR103K
SBT-0180W
6 3
PR4
LB1268
PR3
5 VP
ECQ-B1H103-KF
SBT-0180W
PR2
LB1268
8 1
PR1
HE60TKYB222K
DSTC50TKYR103K
2
1
4
6
3
VP
VDW
HE40TKYB221K
DR2
4.7K
1SR35-100A
7
DR1
75
2.2K
2SA933
2SD1961(S)
GNDP
8
A B
C D E
ISMA-9604S-21C
P32
REG 41
P31
RF 42
P30
PGM 43
INTP3
RP 44
INTP2
Pt 45
INTP1
PWD 46
INTP0
PT 47
IC
48
P72
PAD2 PAD3 49
P71
PAD2 50
P70
PAD1 PAD1 51
VDD
52
P127
KI7 53
P126
KI6 54
P125
KI5 55
P124
KI4 56
P123
KI3 57
P122
KI2 58
P121
KI1 59
P120
KI0 60
P117
WMO 61
P116
PMO 62
P115
PHD 63
P114
KC3 64
VN
C D E
F G H
DTA143ZS
GND
VDD
LBON
2
CST4. 19MGW
1
S-80728AN
3
GND
GND
GND VDD
C-10
ANI4
24
ANI5
23
ANI6
22
ANI7
21
AVss
20 PADC
P73
19 DRW
P74
18
RESET
17
P20
16
P21
15
P22
14
P23
13
P24 LBDN
12
µPD78044AGF195-3B9
P25
11
P26
10
P27
9
VDD
8 G1
FIP0
7 G2
FIP1
6 G3
FIP2
5 G4
FIP3
4 G5
FIP4
3 G6
FIP5
2 G7
FIP6
1
G8
HE40TKYB101K X2
Name Board No.
PCR-260
F G H
— 15 —
I J K
PAD CONDITION
PAD 1 PAD 2
OPEN OPEN
DISP1
10-MT-75GC
20
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
VF1
VN VF2
Drawing No.
E266-1 (1/2)
E240060
BLOCK DIAGRAM
I J K
1
2
3
4
VF
Pdp
Pg
Pf
Pe
Pd
Pc
5
Pb
Pa
1G
2G
3G
4G
5G
6G
7G
8G
6
9G
VF
VN
7
8