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

HCD-F250AV
Q Q
6-3. BLOCK DIAGRAM — AUDIO SECTION —
3 7 6 3 1 5 1 5 0
HRP1
(PLAYBACK)
PB EQ AMP
L-CH
R-CH R-CH
HRP2 (1/2)
(RECORD/PLAYBACK)
PB EQ AMP
L-CH
R-CH R-CH
REC/PB SWITCHING
3 1
R-CH R-CH
T E
L 1 3 9 4 2 2 9 6 5 1 3
2
R-CH
RV341
RV441
REC BIAS (R) REC BIAS (L)
(DECK B) (DECK B)
REC BIAS
SWITCH
BIAS OSC
HRP2 (2/2)
T621
(ERASE)
BIAS OSC
Q621, 622
16
w w w
DECK PROCESS
DECK A/B SELECT, PB/REC EQ AMP,
DOLBY NR AMP, ALC, AMS
IC301
70
AIN (L)
(DECK A) 48
BIN (L)
IC611
46
120
RV311
PB LEVEL (L) R-CH
(DECK A)
BIAS (N)
33
BIAS
BIAS (C)
32
CONTROL
BIAS (M)
CIRCUIT
31
(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
B+
(A+7V)
Q623
97 99 94 93 92 90 89 88 87
95 96
S1003
(DECK A HALF)
S1001 S1002
(DECK A PLAY) (DECK B PLAY)
x a o
. i
— 31 —
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DOLBY PASS
DOLBY NR
AMP
CIRCUIT
+
L.P.F. ALC
BUFFER
MAOUT
39
28 43 44 35 34 38
27
MSIN
RV301
AMS
REC LEVEL (L)
CIRCUIT
(DECK B)
MSOUT
26
Q Q
3 7 6
SL1
TRIGGER PLUNGER
DECK A
ROTATION ROTATION TRIGGER
DETECT SENSOR DETECT SENSOR PLUNGER DRIVE
(DECK A) (DECK B) (DECK A)
IC1001 IC1002 Q333, 334
31 26 27 84
SYSTEM CONTROLLER
IC501 (2/3)
98 28
S1006
(DECK B HALF)
S1005
(DECK A REC)
S1009
(DECK B REC)
u 1 6 3
y
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2 4
8 9 9
PB OUT (L)
PB-L
40
EQ OUT
(L)
REC
A
36
EQ AMP
TO/FROM
MAIN
BLOCK
(Page 29)
REC-L
3 1 5 1 5 0 8 9
RV1001
TAPE SPEED
(HIGH)
SL2
TRIGGER PLUNGER
CAPSTAN MOTOR
DECK B
CONTROL SWITCH
Q1001
TRIGGER
PLUNGER DRIVE Q335
(DECK B)
Q331, 332
83 82
CAPM-CNT1P 17
CAPM-CNT2P 77
85
CAPM-CNT1M
CAPM-CNT2M 86
m
c o
.
— 32 —
2
8 9 9
• SIGNAL PATH
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
: RECORD
2 4 9 8 2 9 9
RV1002
TAPE SPEED
(NORMAL)
CAPSTAN
MOTOR DRIVE
Q336 – 339
M1
M
(CAPSTAN)
CAPSTAN
MOTOR DRIVE
Q340 – 343