Main Section Overview - Sony HCD-GX20 Service Manual

MAIN Section
FE101
FM FRONT-END
JK103
CF101 CF102
10.7MHz Q101 10.7MHz
IF_
8 ANT-IN 1
OUT
RF IF AMP
FM 75Ω
G
F_OUT 3 16
Q102
AM
B+ 5 +12V
VT 4
10
1
X101
4.5MHz
22
20
19
18
+12V
3 8
RB101 1 9 11
2
5
12
7 10
IC201
DECK A/B SELECT,
PB/REC EQ AMP
PB-OUT(L) 26
DECK-A
REC-IN(L)
24
AIN(L)
32
ALC(L)
23
PB
HEAD
R-CH
DECK-B
34 BIN(L)
BIAS
21 REC-OUT(L)
TRAP
REC/PB
HEAD
EQOUT(L)
28
L201
R-CH
R-CH
RECMUTE-ON/OFF 15
Q209
ERASE
BIAS MUTE-ON/OFF 14
HEAD
OSC
A/B 13
Q207
+12V
Q208
BIAS
Q205
Q203
Q204
Q206
RECBIAS
• R-CH is omitted due to same as L-CH
• Signal Path
: FM
: CD
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
CD A
SECTION
IC101
AM/FM IF MPX
1 FM-IN L-OUT 13
IC102
Q105
PLL R-OUT 14 R-CH
MUTE
11
FM 7 FM/AM
24
AM OSC 15 FM SD AM IF-IN 4
FM OSC IFT101
RV101 Q305
AM MIX-OUT 2
FM TUNED
LEVEL
FA
VCO STOP 9 12 VCO STOP
XIN
IF IN 12 10 IF-REQ
MUTE
IF REQ 8
XOUT
T101
R DO
A OUT DO 6
R DI
FM-DET 8
DI 4
R CL
A IN CLK 5
R CE
PD CE 3
21 AM RF-IN
22 AFC
TUNED 6
STEREO 7
23 AM OSC
D105
IC601(2/3)
SYSTEM CONTROL
78 TUNER TUNED DATA 94
TUNER STEREO
79
SYS MUTE 3
R DO
96 DATA DIN
R DI
95 DATA OUT
R CL
97 CLK
TAPE A STAT 18
R CE
93 CE
TAPE B STAT 19
Q229,220,221
TAPE AMS
83
AMS
IC202
BUS/SHIFT
REGISTER
TAPE PHOTO A
81
10 TUNER MUTE
9 REC MUTE DI 26
TAPE PHOTO B
82
12 TAPE MUTE CLK 3
85
8 A/B LATCH 4 LATCH
Q224,225
SOL A 23
A SOL DRIVE
18 BIAS
Q222,223
SOL B
22
B SOL DRIVE
REC
20 Q226,227
MECHA VCC 24
M+B CONT
Q329
Q319
GAME GAIN1 6
BUFF
Q333
Q321
GAME GAIN2 7
BUFF
Q328
Q317
GAME MUTE 5
BUFF
STK MUTE 19
SPK RELAY 17
CD CTL ON/OFF 21
Q228
RESET 2
RESET
IC301
IC501
SOUND PROCESSOR
POWER AMP
CD-L
9 C1
6
OUT1 17 1
2
7
Q315
5 A1
MUTE
12
Q581
7 B1
MUTE
D315
4 SEL1
Q330
Q313,314 Q503,504
+5.6V
MUTE CONT MUTE CONT
1 VIN1
13 SC
14 SI
Q311
IC303
6
TAPE DECK
TAPE A HALF
TAPE MODE SW A
TAPE B HALF
TAPE MODE SW B
TAPE FWD REC SW B
PHOTO SENSOR A
PHOTO SENSOR B
TAPE SOL A
TAPE SOL B
MOTOR SW VCC
JK681
L
AUDIO
R-CH R
GAME INPUT
VIDEO
JK602
VIDEO OUT
21 21
R CH
Q331
MUTE
RY2
Q501 D502 Q805 Q806
Q807,808
OVER LOAD PROTECT PROTECT RELAY
R CH
DETECT CONT SWITCH DRIVE
Q809,810
Q813
PROTECT
PROTECT
DETECT
SWITCH
IC601(3/3)
SYSTEM CONTROL
HEADPHONE SENSOR 77
PROTECTOR SENSOR FLD601
84
FLOURESCENT
INDICATOR TUBE
7
20
VACS
VF
Q307
21
SPEANA IN L G01 41
SPEANA
G12 30
42
S631-638
45
FUCTION
.
23 KEY INPUT 0
KEY
P01 47
P22 50
S621-626
.
52
FUCTION
24
KEY INPUT 1
KEY
65
S611-620 BU+5.6V
LED616
FUCTION
25 KEY INPUT 2
KEY
PWR LED 1
+5.6V
26 PWR/DISP SW LED615
S602 S601
GAME MIX LED 92
DISPLAY ?/1
LED611
GAME LED 91
VR601
8 VR ENCODER A
VOLUME
VOLUME LED612
ENCODER
7 VR ENCODER B
TAPE LED 85
RM601 LED614
TUNER LED 87
REMOTE
REMOCON IN
CONTROL 27
LED610
RECEIVER
CD LED 86
15 CF1
CF101
10MHz
VPP 51
CF2
16
12 XT1
X601
32.768kHz
Q601
13 XT2
RESET 11
PWR DOWN 28
2 P.S. RELAY
IC602
3 RESET
HCD-GX20
JK691
PHONES
L
R JK303
SPEAKER
L
R
VF
T911
POWER
TRANSFORMER
(MAIN)
D911
Q911
-30V REG
-30V
POWER +B
RECT
AMP
D541
-B
IC802
+12V
+12V 1 3
REG
D543 D542
+12V
UNREG
D801-804
IC803
+5.6V
+5.6V 1
3
REG
IC804
Q802
+5V
CD +5V 1 3
REG
Q801
D805-808
D809 IC801
D810
+9V
CD +7V 1 3
REG
M +9V VF
VF
T901
POWER
TRANSFORMER
BU +5.6V
(SUB)
D902-905
IC901
D616
EVER +5.6V
+5.6V AC
1 3 1
REG IN
D615
RY901
Q901
RELAY
DRIVE