Block Diagram -Audio Section - Sony HCD-F250AV Service Manual

HCD-F250AV
6-3. BLOCK DIAGRAM — AUDIO SECTION —
HRP1
(PLAYBACK)
L-CH
R-CH R-CH
HRP2 (1/2)
(RECORD/PLAYBACK)
L-CH
R-CH R-CH
REC/PB SWITCHING
3 1
R-CH R-CH
2
R-CH
RV441 RV341
REC BIAS (R) REC BIAS (L)
(DECK B) (DECK B)
BIAS OSC
HRP2 (2/2)
T621
(ERASE)
BIAS OSC
Q621, 622
DECK PROCESS
DECK A/B SELECT, PB/REC EQ AMP,
DOLBY NR AMP, ALC, AMS
IC301
70
PB EQ AMP
AIN (L)
(DECK A) 48
BIN (L)
IC611
46
120
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
S1004
IC602
(DECK A 120/70)
S1008
(DECK B 120/70)
4
C331, L331
BIAS
TRAP
REC BIAS
B+
SWITCH
(A+7V)
Q623
97 99 94 93 92 90 89 88 87
95 96
(DECK A HALF)
S1001 S1002
16
(DECK A PLAY) (DECK B PLAY)
— 31 —
DOLBY PASS
DOLBY NR
AMP
CIRCUIT
+
R-CH
L.P.F. ALC
BUFFER
MAOUT
28 43 44 35 34 39
27
MSIN
RV301
AMS
REC LEVEL (L)
CIRCUIT
(DECK B)
MSOUT
26
TRIGGER PLUNGER
ROTATION ROTATION
DETECT SENSOR DETECT SENSOR PLUNGER DRIVE
(DECK A) (DECK B)
IC1001 IC1002
31 26 27
SYSTEM CONTROLLER
IC501 (2/3)
98 28
S1003
S1006
(DECK B HALF)
S1005
(DECK A REC)
S1009
(DECK B REC)
PB OUT (L)
PB-L
40
EQ OUT
(L)
REC
36
EQ AMP
TO/FROM
BLOCK
38 (Page 29)
REC-L
RV1001
TAPE SPEED
(HIGH)
SL1 SL2
TRIGGER PLUNGER
DECK A DECK B
TRIGGER TRIGGER
PLUNGER DRIVE Q335
(DECK A) (DECK B)
Q333, 334 Q331, 332
84 83 82
CAPM-CNT1P
CAPM-CNT2P
CAPM-CNT1M
CAPM-CNT2M
— 32 —
• SIGNAL PATH
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
: RECORD
A
MAIN
RV1002
TAPE SPEED
(NORMAL)
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
CAPSTAN
17
MOTOR DRIVE
77
Q336 – 339
M1
M
(CAPSTAN)
CAPSTAN
85
MOTOR DRIVE
86
Q340 – 343