Block Diagram - Main Section - Sony CFD-S28L Service Manual

Q Q
6-3. BLOCK DIAGRAM – MAIN Section –
7
3
MAIN BOARD (2/2)
CD VREF
L-CH
(Page 18) A REC/PB EQ AMP
IC301
MIC IN MIC
KH303
13 MUTE
AMP
(1/2) L.CD
24
1 L-CH L.RAD
22
(Page 20) B R-CH
2
R-CH
MUTE
MONITOR L.LO
HRP301 CNP301
AMP
(REC/PB) BUFFER
4 L.IN
PB
5
BUFFER
EQ AMP
L-CH 3
2
R-CH
L.RO
R-CH REC
4 ALC
EQ AMP
DET LOGIC CIRCUIT
HE301
(ERASE) VREF
REFERENCE VOLTAGE
6
VREF
GENERATOR
15 17 21
B+ (REC B+)
B+
B+ (CD 5V)
Q303 Q302 (REC B+)
T301
ISS 1 ISS 2
BIAS OSC
SWITCH SWITCH
BIAS OSC
Q301
Q322, 323
T E B+ (REC B+)
REC/PB L 1 3 9
SWITCHING Q321
(PB: ON) REC/PB
SWITCHING
(REC: ON)
VREF
VREF
REC/PB
SWITCHING
Q324, 325
REC/PB
B+
SWITCHING
(REC B+)
Q326
D302
13 76 77 69 19 20 18 66
CNP304
S304
SYSTEM CONTROLLER
(TAPE PLAY) 2
IC501 (2/2)
79 TC-PLAY
1
23 24 25 15 16 17 14 67
S303
(MOTOR ON/OFF) 3
B+ (VDD SW) B+ (VDD SW)
4
5 CNP502 KH506
4 2 1 6 1 3 2 4 5
M301 M M
(CAPSTAN/REEL)
6
4 2 1 6 C
CNP602
(Page 20)
w w w
D601
OPR/BATT
S601 – 607, 609 – 614,
S617 – 624
CONTROL BOARD
05
– 21 –
1 5 1
6 3
SOUND CONTROL,
ELECTRICAL VOLUME POWER AMP
IC302 IC303
MATRIX TONE VOLUME
IN2 OUT2
20 31 SOUND CONTROL CONTROL 24 12 3 10 5
CIRCUIT CIRCUIT CIRCUIT
STBY
8
CONTROL
19 20 18 23 21
R-CH
D351
+
LINE MUTE Q309
MEGA BASS
SWITCH
CONTROL
Q308 R-CH
SWITCH
4 2 2 9 6 5 1 3
KH303
CNP2 (2/2) (2/2)
4 R-VT 4
PLL LOW-PASS
FILTER CIRCUIT B+
LIQUID CRYSTAL DISPLAY
LCD501
2 6
PLL 5V
FM/AM PLL (IC2) B+
3 RADIO 6V 5
80 21 42 – 64 38 – 41 FM/AM TUNER (IC1) B+
SEG0 – SEG22
COM0 – COM3
TUNER BOARD (2/2)
COM 5V
32 31 73 74
CD POWER
CD 5V SWITCH
Q313
X501 X502
32.768kHz CD 71
4.19MHz
RADIO 70
SHIFT
29
CLOCK
RESET SIGNAL
RST 30 GENERATOR
Q505 Q506 IC503
Q505, 506
REC B+
x a o
SHIFT CLOCK
y
2 1
. i
S305
(REC)
– 22 –
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5
0
HEADPHONE
• SIGNAL PATH
BOARD
: CD PLAY
: TUNER (FM/MW/LW)
: TAPE PLAY
: TAPE RECORD
R-CH
R-CH: Same as L-CH.
KH306 CNP306
J301
5 5
2
(HEADPHONE)
CNP307
4
SP301
4 4
3
(L-CH)
1
SP302
2
(R-CH) SECONDARY BOARD
R-CH
CNP902
KH302
D910
AC, BATTERY 2 4
AC HI
CHECK
Q501, 502
POWER AMP
(IC303, 304) B+
B+ SWITCH
Q951
Q Q PROTECT
3 7 6
SWITCH
Q401
D955
D952
D951
D303
5 1
B+ SWITCH VDD
Q952, 953
+5V +6V
REGULATOR REGULATOR
Q957 Q954, 955
RADIO POWER
SWITCH
Q311, 312
SYSTEM +5V 3 3
UCOM
CONTROLLER REGULATOR
(IC501) B+ IC502
D402 Q404
LEVEL DET
Q405
AU VDD
Q406
VDD SW
D401 Q402
LEVEL DET
Q407
1
5
SW D
u 1 6 3
CNP305
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2 4
8 9 9
PRIMARY
BOARD
T901
POWER
D908
TRANSFORMER
CNJ901
⁄ AC IN
D909
3 1 5 1 5 0 8 9
CNP906 KH902
2 RECT OUT 2
RECT
D901 – 904
1 COM 1
3 BATT 3
BATTERY
BOARD
D905
CNP901 KH901
D906
3 3 DRY BATTERY
REGULATOR 9V
SIZE "D"
IC901
(IEC DESIGNATION R20)
AC DET 6PCS. 9V
Q408 (FOR POWER SUPPLY)
D907
4.5V
D403 – 405
AC DET
0V
Q409
1 1
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
D406 – 408 4PCS. 6V
m
2 2
(FOR BACK UP)
KH905 CNP904
c o
1 1
4 4 2 2
.
BATTERY
COMMON BOARD
– 23 –
CFD-S28L
2
8 9 9
2 4 9 8 2 9 9
– 24 –