Main Section - Sony CFD-G30L Service Manual

– MAIN SECTION –
LINE IN BOARD
J301
MAIN BOARD(2/2)
R-CH
LINE
IN
L OUT
TUNER/CD
B
SECTION
PRE AMP
PRE AMP
IC301
BOARD
L IN
24
L-CH
TUNER/CD RADIO
A 22
SECTION BUFFER
TAPE AMP 7dB
L
20
TAPE
PB AMP
5
REC AMP
L-CH 26dB
HRP301
4
REC/PB
HEAD R-CH R-CH REF REC TAPE LINE
R-CH
6 21 15 17
HE301 T301
ERASE
Q301
HEAD
BIAS
OSC
REC S301
REC AUDIO 6V
PB
D501
Q515
SWITCH
RADIO 6V AUDIO 6V
Q513,514
D502
SWITCH
D VDD COM3.3V
Q511,512
M321
M
(LOADING)
EEP ROM
IC504
S322
MOTOR SW B+
(MOTOR SW)
5 6
S321
(PLAY SW)
79 71 23 69 70 24 77
73 TX
X502
153kHz
74 TEX
32 XTAL
X501
4MHz
31 EXTAL
25
16
FUNCTION FUNCTION FUNCTION
SWITCH SWITCH SWITCH
S631,632 S621-623 S601,602
CONTROL-3 CONTROL-2
CONTROL-1 BOARD(2/2)
BOARD BOARD
— 15 —
SOUND/VOLUME
IC321 HEADPHONE BOARD
13 S IN
S OUT 21 POWER AMP
14
S IN IC323
R-CH
9
IN L OUT 5 12 3
STBY
MUTE
8
Q122
VDD(S.W)
1 30 2
BASS AGC
Q326,327
WOOFER
POWER AMP
L.P.F
IC324
IC322
2 1 5 7
12
3
13
MUTE
Q321
10
5
11
STBY
8
Q322
Q329 Q328
VDD(S.W)
WOOFER WOOFER
GAIN CONT GAIN CONT
VCC
Q517 Q516
SWITCH AUDIO 6V
Q518,519
LED
DRIVE
Q601
D601
D603,604
CONTROL-1 (1/2)
BOARD
19 20 18 76 64 63 28 21 22 65 30
RMC 2
D512
MODE CHK 29
IC501(2/2)
SYSTEM CONTROL MODE
CHECK
Q507
AC/DC
INIT 62 DISTINCTION
Q505,506
SEG0 SEG17 COM0 COM3
42 49 38 41
26 27
FUNCTION FUNCTION LCD651
LIQUID CRYSTAL
SWITCH SWITCH
DISPLAY PANEL
D651
S603-607 S608-611
(OPR/BATT)
LCD BOARD(1/2)
J391
• RCH is omitted
• Signal Path
: FM
SP391
L
: CD
SPEAKER
: PB
SP392
R
: REC
SP393
WOOFER
MOTOR SW B+
POWER AMP B+
AUDIO +6V
3.3V REG 6V REG 9V REG
COM +3.3V
Q956 Q955 Q954
D955 D955 D952 D958
D951
POWER
VDD(S.W) SWITCH
Q952
Q953 Q951
D322
BATT
R VT
BOARD
BATT COM
BOARD
POWER
BATTRY
CHECK BATT
Q503,504 1.5x8=12V
µ COM(VDD)
IC503 IC502
D503
3.3V
1 RESET 2 3 2
REG
T901
RECT
D901-904
POWER BOARD
D507
IC651
D508
REMOTE RMC REG
1 3
CONTROL
Q509
LCD BOARD
(2/2)
G50L
MODEL
— 16 —
WAVEFORMS
Note on Printed Wiring Board:
1
IC2 w; • X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• b : Pattern from the side which enables seeing.
1.5Vp-p
Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
500mV/div
13.3us
and tantalums.
10µsec/div
• All resistors are in Ω and
specified.
2 IC501 ea
• f : internal component.
• 2 : nonflammable resistor.
• C : panel designation.
3.6Vp-p
• H : adjustment for repair.
• U : B+ Line.
• Power voltage is dc 12 V and fed with regulated dc power
1V/div
250ns supply from battery terminal.
100nsec/div
• Voltages and waveforms are dc with respect to ground
3 IC501 uf under no-signal (detuned) conditions.
Note : The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
2.0Vp-p Replace only with part number specified.
– For Radio, TAPE section MAIN (1/2) –
500mV/div no mark : PLAY (TAPE SECTION)
6.5us
5µsec/div
TAPE STOP
( ) : REC (TAPE SECTION)
4 T301
[ ] : FM (RADIO SECTION)
< > : AM (RADIO SECTION)
– For CD Section MAIN (2/2) –
32.0Vp-p
no mark : CD PLAY
CD STOP
• Voltages are taken with a VOM (Input impedance 10 MΩ).
18.0us 1V/div Voltage variations may be noted due to normal produc-
10µsec/div
tion tolerances.
5 • Signal path.
IC702 ta
F : FM
f
: MW/LW
E : PB
1.1Vp-p
a
: REC
J : CD
400ns/div
200mV/div
6 IC702 yj
4.0Vp-p
J901
~AC IN
59ns 1V/div
20nsec/div
— 17 —
CFD-G30L/G50L
1 / W or less unless otherwise
4