Block Diagram - Tape Deck Section - Sony HCD-GRX50 Service Manual

HCD-GRX50/R770/RXD7
7-2. BLOCK DIAGRAM – TAPE DECK Section –
HP101
(PLAYBACK)
PB EQ AMP
L-CH (DECK A)
IC611
RV311
PB LEVEL (L)
R-CH R-CH
(DECK A)
HRPE101 (1/2)
(RECORD/PLAYBACK)
PB EQ AMP
(DECK B)
L-CH
IC601
RV301
PB LEVEL (L)
(DECK B)
R-CH R-CH
REC/PB SWITCHING
IC602
3 1
R-CH R-CH
4
2
C331, L331
BIAS
TRAP
R-CH
RV441 RV341
REC BIAS (R) REC BIAS (L)
(DECK B) (DECK B)
REC BIAS
B+
SWITCH
(A+7V)
Q623
BIAS OSC
HRPE101 (2/2)
T621
(ERASE)
BIAS OSC
Q621, 622
05
DECK PROCESS
DECK A/B SELECT, PB/REC EQ AMP,
DOLBY NR AMP, ALC, AMS
IC301
70
AIN (L)
48
BIN (L)
46
120
+
R-CH
L.P.F.
BIAS (N)
BUFFER
33
BIAS
BIAS (C)
32
CONTROL MAOUT
BIAS (M)
CIRCUIT
31 28 43 44
27
MSIN
AMS
CIRCUIT
MSOUT
17 19 15 16 18 20 22 23 24 25 26
S1004
(DECK A 120/70)
S1008
(DECK B 120/70)
ROTATION
DETECT SENSOR
(DECK A)
IC1001
91
100 85 84 83 82 81 80 79 78 77
87 86 88
S1006
(DECK B HALF)
S1003
(DECK A HALF)
S1005
(DECK A REC)
D+5V
S1001 S1002
S1009
(DECK A PLAY) (DECK B PLAY)
(DECK B REC)
– 21 –
DOLBY PASS
PB OUT (L)
40
DOLBY NR
AMP
CIRCUIT
EQ OUT
ALC
(L)
REC
36
EQ AMP
39
35 34 38
RV301
REC LEVEL (L)
(DECK B)
TRIGGER PLUNGER TRIGGER PLUNGER
DECK A DECK B
ROTATION TRIGGER TRIGGER
DETECT SENSOR PLUNGER DRIVE PLUNGER DRIVE
(DECK B) (DECK A) (DECK B)
IC1002 Q333, 334 Q331, 332
90 73 72
SYSTEM CONTROLLER
IC501 (2/4)
89
• SIGNAL PATH
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
PB-L
B
: RECORD
(Page 23)
REC-L
C
(Page 24)
RV1001 RV1002
TAPE SPEED TAPE SPEED
(HIGH) (NORMAL)
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
Q335
76
CAPSTAN
CAPM-CNT1 75
M1
M
MOTOR DRIVE
(CAPSTAN)
CAPM-CNT2 74
Q336 – 343
– 22 –