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Q Q
3 7 6 3 1 5 1 5 0
2-4.
SCHEMATIC DIAGRAM – MAIN Board (2/3) –
HP901
(PLAYBACK)
6
L
5
FWD
C301
1
1000p
CN351
R
7P
F-R(CH)
1
R(CH)-COM
2
4
R-R(CH)
3
L
GND
4
REV
R-L(CH)
3
5
R
L(CH)-COM
2
6
F-L(CH)
7
7
C401
1000p
T E
L
1 3 9 4 2 2 9 6 5 1 3
CN352
13P
MECHANISM BLOCK
+B(8.5V)
(TAPE DET)
REEL2
REEL1
(METAL DET)
AUTO.MTL
POS4
ROTARY
GND
SLIDE
TAPE
SWITCH
OPERATION
POS3
POS1
LOADING/TAPE
POS2
OPERATION
LM-
TAKE-UP/SUPPLY
LM+
REEL SENSOR
GND
C-MOTOR
M901
(CAPSTAN/REEL)
JC77
0
C365
w w w
.
R351
R305
C305
R307
C309
18k
330k
0.22
2.2k
1000p
R303
R308
C310
15k
10k
2200p
JC17
R304
0
22k
R306
C304
470
0.01
C302
330p
JC16
0
C303
C350
330p
22
TAPE EQUALYZER AMP/
16V
DOLBY NR AMP
C403
330p
IC351
CXA2509AQ
JC15
0
C402
330p
C404
0.01
R403
R404
15k
22k
D350
R406
R405
R353
R355
470
330k
4.7k
22
MA111
C357
C353
100
0.47
10V
50V
C351
100p
Q361
Q362
2SD1802FAST
REGULATOR CONTROL
REGULATOR
SWITCH
JC36
(TAPE ON)
0
IC360
MM1322XFBE
JC76
Q362
0
XN1A312
GND
IN1
-2
R362
R363
4.7
4.7
R361
VCC
OUT1
1k
IN2
VS
-1
OUT2
GND
C366
10
16V
JC75
JC74
0
0
LOADING/TAPE
C367
10
220
OPERATION MOTOR DRIVE
16V
16V
x
a o
y
i
http://www.xiaoyu163.com
8
C408
C308
R408
1
1
10k
50V
50V
JC58
0
C410
2200p
JC18
0
R407
2.2k
R548
10k
MD5
R549
10k
MD4
R550
10k
MD2
R551
10k
MD1
MD3
C356
R352
0.1
220k
Q
Q
R354
C354
15k
0.01
3
7
6
3
C501
100
ON1
10V
ON2
ON3
C502
1
ON4
JC56
0
X501
8MHz
R505
1k
C503
X502
32.768kHz
18p
R506
330k
C504
22p
CPU1
C507
0.1
RDS1
CPU2
R511
CPU3
MD14
100k
R507
1k
DATA
CLK
R508
2.2k
MD10
CE
MD11
JC54
R509
0
1k
MD13
MD12
Q364,365
CAPSTAN/REEL
MOTOR DRIVE
Q364
2SB1132-R
R531
R365
100k
4.7k
R364
10k
RDS2
MD9
JC52
0
Q365
DTC114EKA
u 1 6 3
.
5
5
http://www.xiaoyu163.com
2
4
9
9
8
(Page 4)
TU3
TU6
JC24
0
1
5
1
5
0
8
9
2
4
DS
KS
DBB
SYSTEM CONTROLLER
AD0
IC501
AD1
MN1886426Y5G
UNISO
UNISI
UNICLK
R514
1k
LCD1
LCD4
R515
1k
R516
1k
LCD2
LCD3
R517
1k
R501
100k
R513
100k
R512
R533
100k
100k
m
c o
XR-C453RDS
2
9
9
C1
C2
C3
L501
10µH
C4
JC70
0
R535
JC81
100k
0
KS
C5
R537
100k
DS
9
8
2
9
9
DBB
C6
R539
10k
R538
100k
R540
100k
C7
C8
D504
D506
MA152WA
1SS119
C9
(Page 6)
C505
0.1
R518
100k
C10
C11
C12
C13
C14
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