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MHC-GRX9900
7-2.
BLOCK DIAGRAM – TAPE DECK Section –
HP101
(PLAYBACK)
L-CH
R-CH
R-CH
HRPE101 (1/2)
(RECORD/PLAYBACK)
L-CH
R-CH
R-CH
R-CH
RV441
REC BIAS (R)
REC BIAS (L)
(DECK B)
BIAS OSC
HRPE101 (2/2)
T621
(ERASE)
05
DECK PROCESS
DECK A/B SELECT, PB/REC EQ AMP,
DOLBY NR AMP, ALC, AMS
IC301
PB EQ AMP
AIN (L)
(DECK A)
48
BIN (L)
IC611
46
RV311
PB LEVEL (L)
(DECK A)
BIAS (N)
33
BIAS
BIAS (C)
32
CONTROL
BIAS (M)
CIRCUIT
31
PB EQ AMP
(DECK B)
IC601
RV301
PB LEVEL (L)
(DECK B)
17
19 15 16 18 20 22 23 24 25
REC/PB SWITCHING
S1004
IC602
3
1
(DECK A 120/70)
R-CH
R-CH
S1008
(DECK B 120/70)
4
2
C331, L331
BIAS
TRAP
RV341
(DECK B)
REC BIAS
B+
SWITCH
(A+7V)
Q623
100
85 84 83 82 81 80 79 78
BIAS OSC
Q621, 622
87
D+5V
S1001
(DECK A PLAY)
– 21 –
DOLBY PASS
70
DOLBY NR
AMP
120
CIRCUIT
+
R-CH
L.P.F.
ALC
BUFFER
MAOUT
28
43
44
35
34
27
MSIN
AMS
CIRCUIT
MSOUT
26
ROTATION
ROTATION
DETECT SENSOR
DETECT SENSOR
(DECK A)
(DECK B)
IC1001
IC1002
91
77
90
SYSTEM CONTROLLER
IC501 (2/4)
86
88
89
S1006
(DECK B HALF)
S1003
(DECK A HALF)
S1005
(DECK A REC)
S1002
S1009
(DECK B PLAY)
(DECK B REC)
PB OUT (L)
PB-L
40
(Page 23)
EQ OUT
(L)
REC
36
EQ AMP
39
38
RV301
REC LEVEL (L)
(DECK B)
REC-L
(Page 24)
TAPE SPEED
TRIGGER PLUNGER
TRIGGER PLUNGER
DECK A
DECK B
TRIGGER
TRIGGER
PLUNGER DRIVE
PLUNGER DRIVE
Q335
(DECK A)
(DECK B)
Q333, 334
Q331, 332
73
72
76
– 22 –
• SIGNAL PATH
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
B
: RECORD
C
RV1001
RV1002
TAPE SPEED
(HIGH)
(NORMAL)
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
CAPSTAN
CAPM-CNT1
75
M1
M
MOTOR DRIVE
(CAPSTAN)
CAPM-CNT2
74
Q336 – 343
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