32
Nov. 1998
HP-555G
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
CIRCUIT DIAGRAM (FRONT JACK, ANALOG ,INLET)
EQ BOARD
PIANO ANALOG BOARD
XRST
L(MONO)
R
L(MONO)
R
BOARD
BOARD
BOARD
BOARD
To
EQUALIZER
BOARD
M C
M C
MAIN
TRANS
To
SPEAKER
To
To
PHONES
PANEL L
To
MIC
To
XRST
M S
M S
TRANS BOARD
TO MAIN BOARD
F1
F1
INLET BOARD
F4
F3
PAB3 ANALOG BOARD
FUSE
F3/F4 SB 5A/125V
F5 SB 4A/125V
F5
100/117V SB 4A/125V FUSE (ASSY 71011878)
230/240V S506 1.6A/250V FUSE (ASSY 71015456)
ASSY 71011978
HP-535/555G
FRONT JACK BOARD
ASSY 71011867
Phones
Computer
MIDI In
To
CN1
(CN301)
ANALOG
BOARD
PAB3
Inlet
To
SWITCH
To
TRANS
PRIMARY
POWER
To
CN15
PAB3
ANALOG
BOARD
To
MAIN
BOARD
(CN9)
MIDI
(REAR)
(FRONT)
TERMINAL
L
R
(CN10)
BOARD
PAB3
(CN501)
To
(CN11)
To FDD UNIT
(CN1)
(CN1)
(CN201)
PAB3
PAB3
Pedal
Output
Input
Indicator
Power
Computer
Switch
To
PAB3
ANALOG
BOARD
(CN2)
+
+
+
+
+
+
+
+
+
+
+
+
+
FH401
CNT47-0003A
C401
4700
2
1
C202
33/16
2
1
C201
33/16
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
CN201
10JQ-ST
C204
0.068
C206
0.068
R208
6.8K
R204
6.8K
R207
6.8K
R206
6.8K
R202
6.8K
R201
6.8K
C203
0.068
C205
0.068
R205
6.8K
R212
6.8K
1
2
D301
L-1384AD/1ID
R301
680
C302
0.01
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
CN301
B8B-PH-K-S
3
2
1
Q301
RN2227
2
1
C301
33/16
R304
33
R310
68
R308
33
R309
68
R305
33
R306
68
R303
33
R307
68
1
2
3
4
5
7
8
JK302
YKB21-5006
1
2
3
4
5
7
8
JK301
YKB21-5006
R319
100
R315
120
1
2
D302
1SS133
8
5
2
3
7
6
IC302
PC-910
R316
1K
R311
3.3K
10
20
SW301C
SSSF124
4
5
6
IC301B
TC74HC00AF
9
10
8
IC301C
TC74HC00AF
1
2
3
IC301A
TC74HC00AF
R321
150
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
CN302
B9B-PH-K-S
R324
3.3K
12
13
11
IC301D TC74HC00AF
R313
6.8K
R314
33
C304
0.01
R320
1K
R322
33
11
16
12
13
14
15
SW301A
SSSF124
21
26
22
23
24
25
SW301B
SSSF124
2
1
C306
33/16
R312
150
C303
0.1
14
7
IC301E
TC74HC00AF
7
8
5
2
4
1
3
6
JK304
TCS7927-28-401
R328
10K
R327
10K
2
1
6
7
14
13
10
11
16
3
5
4
15
12
9
8
IC303
M5M34051P
R325
12K
R323
12K
R326
5.6K
R318
4.7K
R317
10K
3
1
2
Q18
2SC1815GR
2
- 1
2
- 1
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
2
+ 1
2
- 1
2
+ 1
2
- 1
A
D
+5
D
D
D
D
+5
D
1
2
4
JK2
HLJ7101-01-3010
A
A
A
2
+ 1
2
+ 1
2
+ 1
2
+ 1
2
+ 1
2
+ 1
2
- 1
2
- 1
2
- 1
2
- 1
2
- 1
2
- 1
A
A
A
A
A
+
D
2
+ 1
2
- 1
D
+5
D
A
+5
D
D
D
D
+5
D
2
- 1
+5
D
D
+5
D
D
+5
D
2
- 1
+5
D
+5
D
A
A
A
A
A
A
A
+5
D
+5
D
A
A
A
3
2
1
Q20
RN2227
R16
330
R41
33K
2
- 1
2
+ 1
F
F
F
F
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
CN13
53253-0810
2
1
C93
33/16
2
1
C89
33/16
1
2
3
4
TER3
M1698
2
1
C86
33/16
R105
6.8K
13
9
3
6
8
12
14
1
2
15
A
IC12A
STK401-070
R63
6.8
R64
6.8
R101
6.8K
R108
6.8K
2
1
C85
33/16
R52
6.8K
R89
33K
R88
33K
R55
6.8K
R53
6.8K
2
1
C84
33/16
1
2
4
JK3
HLJ7101-01-3010
R22
330
2
1
C16
33/16
C36
33P
A
R99
6.8K
2
1
C83
33/16
R54
6.8K
2
1
C45
33/16
C53
33P
C54
33P
8
4
+
-
IC4C
M5218AL
R92
56K
R4
680
R3
3.3K
3
1
2
Q1
2SC2878A
R5
6.8K
R6
330
R17
680
R14
3.3K
R15
6.8K
7
6
8
+
-
IC9B
UPC4570HA
C31
330P
2
1
C30
33/16
1
2
4
JK4
HLJ7101-01-3010
2
3
1
Q11
2SK363GR
R56
6.8K
3
2
1
Q10
2SA1015GR
R61
68K
2
3
1
Q6
2SK363GR
3
1
2
Q2
2SC1815GR
R8
68
3
2
1
Q3
2SA1015GR
3
2
1
Q15
2SA1015GR
R7
1K
3
2
1
Q4
2SA1015GR
3
1
2
Q5
2SC1815GR
R9
68
2
3
1
Q7
2SK363GR
8
4
+
-
IC1C
M5218AL
R40
6.8K
R95
6.8K
R79
150
FH7
CNT47-0003A
3
2
1
Q14
RN2227
R71
220
R74
3.3K
25
22
24
15
12
14
1
4
2
5
O U T
I N
4
2
5
JK6
YKF51-5048
R75
220
3
4
IC11B
HD74LS04P
5
6
IC11C
HD74LS04P
R62
120
R50
100
8
5
2
3
7
6
IC10
PC-910
R70
1K
R30
6.8K
R34
3.3K
R103
6.8K
FH6
CNT47-0003A
FH1
CNT47-0003A
11
10
IC11E
HD74LS04P
13
12
IC11F
HD74LS04P
2
1
C47
33/16
4
2
5
8
10
9
1
6
3
7
JK5
YKF51-5031
2
3
1
4
+
-
~
~
D1
D3SBA20
2
+ 1
2
- 1
D
R57
150
R58
150
2
1
C87
33/16
A
A
R51
68K
2
1
C46
33/16
3
1
2
Q8
2SC2878A
2
3
1
4
+
-
~
~
D15
D3SBA20
2
3
1
4
+
-
~
~
D16
D5SBA20
F
R65
10K
2
- 1
C65
0.01
2
1
C50
33/16
R72
150
R69
150
R37
330
R38
330
R39
330
C41
0.01
C42
0.01
C43
0.01
F
2
1
C77
1/50
C17
330P
C38
33P
1
2
IC11A
HD74LS04P
C62
0.1
F
R85
6.8K
1
2
3
4
TER4
M1698
A
2
- 1
FH8
CNT47-0003A
FH4
CNT47-0003A
FH2
CNT47-0003A
2
- 1
1
5
9
+
-
IC6C
UPC4570HA
7
6
8
+
-
IC6B
UPC4570HA
3
4
2
+
-
IC6A
UPC4570HA
3
4
2
+
-
IC9A
UPC4570HA
6
5
7
+
-
IC4B
M5218AL
2
3
1
+
-
IC4A
M5218AL
6
5
7
+
-
IC1B
M5218AL
2
1
C49
33/16
9
8
IC11D
HD74LS04P
14
7
IC11G
HD74LS04P
+5
D
2
1
C80
33/16
A
+
2
1
C9
330/6.3
A
A
A
A
1
2
D12
1SS133
1
2
D24
1SS133
1
2
D23
1SS133
1
2
D22
1SS133
1
2
D18
1SS133
1
6
RL1C
G5Z-2A-12V
3
2
RL1A
G5Z-2A-12V
4
5
RL1B
G5Z-2A-12V
1
2
D9
S5688G
1
2
D13
S5688G
1
2
D14
S5688G
1
2
D4
S5688G
1
2
D3
S5688G
1
2
D11
S5688G
1
2
D19
S5688G
F
D
1
2
3
4
TER2
MEP1866-A
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
CN9
B8P-VH
7
10
11
5
4
16
A
IC12B
STK401-070
C58
0.068
C56
0.068
C57
0.068
C55
0.068
1
2
D7
1SS133
1
2
D5
1SS133
1
2
D8
1SS133
1
2
D6
1SS133
R42
6.8K
R18
680K
R21
680K
R83
56K
R91
56K
R84
56K
R31
680K
R32
680K
R33
680K
R20
680K
2
3
1
+
-
IC1A
M5218AL
R10
680K
R13
680K
2
1
C15
33/16
2
1
C21
33/16
1
5
9
+
-
IC9C
UPC4570HA
A
A
R19
680K
2
1
C72
3.3/50
2
1
C88
3.3/50
2
1
C81
3.3/50
2
1
C66
3.3/50
2
1
C79
33/16
2
1
C64
3.3/50
R47
5.6K
R43
5.6K
R45
5.6K
R48
5.6K
1
2
D10
S5688G
1
2
3
4
TER1
MEP1866-A
R67
150K
A
A
1
5
9
+
-
IC8C
UPC4570HA
1
5
9
+
-
IC7C
UPC4570HA
3
4
2
+
-
IC7A
UPC4570HA
7
6
8
+
-
IC7B
UPC4570HA
3
4
2
+
-
IC8A
UPC4570HA
7
6
8
+
-
IC8B
UPC4570HA
C44
4700p
C5
4700p
A
F
C23
0.1
A
F
C6
0.1
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
CN1
B8B-PH-K-S
C14
ECQV1H 0.33
C13
ECQV1H 0.33
C20
ECQV1H 0.33
C19
ECQV1H 0.33
C3
330P
C2
330P
C8
330P
C7
330P
C4
0.068
C28
0.068
C29
0.068
C33
0.068
C37
0.068
C60
0.068
C59
0.068
C71
ECQV1H 0.33
C70
ECQV1H 0.33
C61
0.068
C12
0.068
C18
0.068
C25
0.068
C26
0.068
C27
0.068
C34
0.068
C48
0.068
C52
0.068
C76
680P
C75
680P
2
1
C40
330/16
2
1
C35
330/16
R68
33K
2
1
C92
33/16
R120
6.8K
R116
6.8K
R119
6.8K
2
1
C91
33/16
R115
6.8K
3
2
1
Q23
RN2227
1
1
2
2
3
3
4
4
CN4
B4B-PH-K-S
3
1
2
Q22
DTC124ES
3
1
2
Q21
DTC124ES
R117
3.3K
NC
2
G
3
RST
5
DLY
4
VCC
1
IC13
M51953BL
R302
150
R329
5.6K
R203
6.8K
R123
3.3K
R121
3.3K
R23
33K
R28
33K
R26
12K
R29
12K
R35
12K
R36
12K
R100
6.8K
R27
330
R76
15K
3
1
2
Q16
2SD667
3
2
1
Q17
2SB647
R80
15K
R109
6.8K
3
1
2
Q19
2SC1815GR
2
1
C63
33/16
3
1
2
Q13
2SC1815GR
2
3
1
Q12
2SK363GR
R96
680
R97
680
R98
680
R110
680
A
IN
1
OUT
3
COM
2
IC2
UPC24A05HF
2
1
C39
6800/35
2
1
C51
6800/35
1
1
2
2
3
3
4
4
5
5
6
6
7
7
CN7
WIRING 01349978
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
CN16
WIRING 01349912
1
1
2
2
3
3
4
4
5
5
CN501
WIRING 01349990
R217
6.8K
R216
6.8K
R211
6.8K
2
3
1
+
-
IC201A
NE5532
2
3
1
+
-
IC202A
NE5532
6
5
7
+
-
IC201B
NE5532
6
5
7
+
-
IC202B
NE5532
8
4
+
-
IC201C
NE5532
8
4
+
-
IC202C
NE5532
L304
ELDR25V
L302
ELDR25V
L303
ELDR25V
L305
ELDR25V
L301
ELDR25V
L309
ELDR25V
L310
ELDR25V
L311
ELDR25V
L308
ELDR25V
L307
ELDR25V
L306
ELDR25V
1
2
D304
MTZJ27C
1
2
D303
MTZJ27C
1
2
D306
MTZJ27C
1
2
D307
MTZJ27C
1
2
D305
MTZJ27C
1
2
D308
MTZJ27C
2
1
C22
6800/16
1
1
2
2
3
3
4
4
5
5
6
6
CN11
53253-0610
1
2
D17
MTZJ9.1B
1
2
D20
MTZJ9.1B
1
2
D21
MTZJ9.1B
R78
150
1
2
4
JK1
HLJ7101-01-3010
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
CN15
B10B-XH-A
IN
1
OUT
3
COM
2
IC5
AN78M12F
IN
2
OUT
3
COM
1
IC3
AN79M12F
R66
15K
R24
6.8K
R11
15K
R1
330(1/2W)
R2
330(1/2W)
R12
15K
R25
6.8K
1
1
2
2
3
3
4
4
5
5
CN2
B5P-VH
FH402
CNT47-0003A
1
2
JK401
INL-8
C212
0.082
R210
6.8K
R214
6.8K
C208
0.082
C215
0.33
R220
680K
R213
6.8K
R209
6.8K
C207
0.082
C211
0.082
C214
0.33
R219
680K
C305
1000P
1
1
2
2
3
3
CN402
B2P3-VH
1
1
2
2
3
3
4
4
5
5
CN401
B2P5-VH
5
2
4
2
54
JK303
M1756