Sony HCD-GX40 / MHC-GX40 Service Manual ▷ View online
18
HCD-GX40
CN731
TP731:
TP connected to pin
TP connected to pin
q;
(IC751)
IC751
CN733
IC731
Adjustment Location: CD board
[CD BOARD] (Component Side)
CD SECTION
RF Level Check
Procedure :
1. Connect oscilloscope to pin q; (IC751).
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check RF signal
1. Connect oscilloscope to pin q; (IC751).
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check RF signal
level is correct or not.
IC751 pin
q;
GND
CD board
oscilloscope
Note :
Clear RF signal waveform means that the shape “
◊
” can be clearly
distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
level : 1.4 to 2.1 Vp-p
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M
3. Use an oscilloscope with more than 10M
Ω
impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
following checks.
19
19
HCD-GX40
SECTION 5
DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
• Indication of transistor.
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
•
A
: B+ Line.
•
B
: B– Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
no mark : FM
<
tion tolerances.
no mark : FM
<
> : CD
[
] : TAPE
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
E
: PB (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
J
: CD
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
5-1. Circuit Boards Location
• Waveforms
KEY BOARD board
PANEL board
SUB TRANS board
MAIN board
CD board
SENSOR board
TRANS board
VIDEO OUT board
POWER board
DRIVER board
MOTOR board
SPDL board
ADDRESS SENSOR board
REM board
AMPLIFIER
board
5
Q209 Collector
(TAPE REC mode)
(TAPE REC mode)
2
IC601
qd
(XT2)
1
IC751
rf
(XOUT)
4
IC102
ws
(XOUT)
2 V/DIV, 100 ns/DIV
5 V/DIV, 10 s/DIV
2 V/DIV, 10 s/DIV
2 V/DIV, 20 ns/DIV
3
IC601
qh
(CF2)
2 V/DIV, 40 ns/DIV
5.2 Vp-p
5.6 Vp-p
59 ns
222 ns
30.5 s
4.9 Vp-p
100 ns
5.0 Vp-p
13.5 Vp-p
17 s
20
20
HCD-GX40
5-2. Block Diagrams
CD Section
: CD
• Signal Path
• R-CH is omitted due to same as L-CH
OPTICAL PICK-UP
BLOCK
(KSM-213D)
LD
DRIVER
Q731
+5V
LD
GND
FOCUS
COIL
F+
F
T+
T
TRACKING
COIL
IC781
FCS/TRK COIL,
SL/SP MOTOR
SL/SP MOTOR
DRIVER
SLED/SPINDLE SERVO,
RF AMP
IC731
1
25
2
27
26
VR
PD
11
12
18
17
3
9
20
7
MUTE
CH1OUT-A
CH1IN-A
CH1IN-B
CH4IN-A
CH2IN-B
CH3IN-B
CH1OUT-B
CH4OUT-A
CH4OUT-B
CH2OUT-B
CH2OUT-A
CH3OUT-B
CH3OUT-A
M
M
(SLED)
(SPINDLE)
S01
(LIMIT)
41
RF SM
VR
58
VCC
VC
A
B
C
D
E
F
DETECTOR
FOCUS/TRACKING/
FIN 1
FIN 2
E
3
F
4
LDD
62
LDS
63
FD
16
TO
15
SLD
29
SPD
27
52
DAT
50
CLK
51
CL
53
CE
34
TGL
54
DRF
39
CV-
40
CV+
Q775
30
SL-
31
SL+
35
TOFF
44
SLI
49
DEF
36
TES
37
HFL
33
JP+
32
JP-
DIGITAL SIGNAL
PROCESSOR
IC751
EFMI
10
EFMO
9
DEF
1
TES
16
HFL
15
JP+
19
JP-
20
COIN
56
4.2M
61
CQCK
57
RWC
54
TGL
18
TOFF
17
SHUTER IN/OUT
28
CLV+
12
CLV-
13
LIMIT SW
27
53
WRQ
55
SQOUT
3
PDO
45
XIN
44
XOUT
X701
16.9344MHz
37
LCHO
40
RCHO
R CH
58
RES
CD CHANGER
CONTROL
IC601 (1/3)
69
99
WRQ
SQOUT
COIN
98
CD RESET
76
SQCK
100
CD RWC
6
CD DRF
68
CD SLED(+)
74
CD SLED(-)
75
D732
IC701
MOTOR
DRIVER
DRIVER
9
7
M
4
2
71
CD NUMBER SENSOR
70
CD BUSY
(PIC UP/DOWN)SW
80
CD OPEN
TABLE
SENSOR
IC711
S701
A
MAIN
SECTION
CD-L
2
1
38
SLOF
RF GAIN
24
4
D_MUTE
26
Q774
MUTE
Q771
73 CD MUTE
67
CD CLOSE
4
CD MOTOR+
5
CD MOTOR-
M721
(TURN)
S711
(UP/DOWN)
(OPEN/CLOSE)
Ver 1.2 2003.11
21
21
HCD-GX40
MAIN Section
: FM
: CD
• Signal Path
• R-CH is omitted due to same as L-CH
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
FM
G
AM
JK101
+12V
+12V
FA
10
FM OSC
16
A OUT
20
A IN
19
PD
18
PLL
IC102
FM
AM OSC
9
VCO STOP
12
IF IN
8
IF REQ
6
DO
4
DI
5
CLK
3
CE
XIN
1
XOUT
22
X101
4.5MHz
RF IF AMP
Q101
10.7MHz
R DO
R DI
R CL
R CE
2
1
5
12
3
8
10
11
7
RB101
2
AM MIX-OUT
8
FM-DET
FM/AM
FM SD
VCO STOP
12
IF-REQ
MUTE
MUTE
10
AM RF-IN
21
AM OSC
23
FM-IN
1
AM/FM IF MPX
IC101
13
L-OUT
14
R-OUT
4
AM IF-IN
IFT101
R-CH
R-CH
6
TUNED
7
STEREO
LATCH
85
TUNER STEREO
79
TUNER TUNED
78
ANT
IN
IN
8
1
IF
OUT
3
F OUT
4
VT
FE101
CF101
10.7MHz
CF102
Q102
AFC
22
CE
93
CLK
97
DATA OUT
95
DATA DIN
96
SYSTEM CONTROL
IC601(2/3)
R DO
R CL
R CE
R DI
BIAS
TRAP
TRAP
R-CH
BIAS
OSC
Q209
+12V
ERASE
HEAD
REC/PB
HEAD
R-CH
PB
HEAD
DECK-B
DECK-A
18
TAPE A
STAT
STAT
81
TAPE PHOTO A
Q207
AIN(L)
32
DECK A/B SELECT,
PB/REC EQ AMP
IC201
BIN(L)
34
REC-OUT(L)
21
TAPE AMS
83
28
EQOUT(L)
AMS
Q229,220,221
26
PB-OUT(L)
24
REC-IN(L)
23
ALC(L)
9
B+
7
15
11
24
FM TUNED
LEVEL
RV101
MUTE
Q105
D105
L201
R-CH
Q203
Q204
Q204
BIAS
Q208
Q205
RECBIAS
Q206
REC MUTE
9
TAPE MUTE
12
A/B
8
15
RECMUTE-ON/OFF
14
MUTE-ON/OFF
13
A/B
BUS/SHIFT REGISTER
IC202
23
SOL A
BIAS
18
REC
20
26
DI
3
CLK
4
LATCH
TUNER MUTE
10
19
TAPE B
STAT
STAT
TAPE DECK
TAPE A HALF
TAPE MODE SW A
TAPE B HALF
TAPE MODE SW B
TAPE FWD REC SW B
PHOTO SENSOR A
82
TAPE PHOTO B
PHOTO SENSOR B
A SOL DRIVE
Q224,225
TAPE SOL A
22
SOL B
B SOL DRIVE
Q222,223
TAPE SOL B
24
MECHA VCC
M+B CONT
Q226,227
MOTOR SW VCC
BUFF
Q319
Q329
6
GAME GAIN1
L
AUDIO
R
GAME INPUT
R-CH
VIDEO
VIDEO OUT
BUFF
Q321
Q333
7
GAME GAIN2
BUFF
Q317
Q328
5
GAME MUTE
JK681
JK602
RESET
Q228
19
STK MUTE
17
SPK RELAY
21
CD CTL ON/OFF
2
RESET
3
SYS
MUTE
MUTE
94
DATA
A
CD
SECTION
CD-L
IC301
A1
5
C1
9
SEL1
4
VIN1
1
17
OUT1
SC
13
SI
14
B1
7
SOUND PROCESSOR
MUTE
Q331
POWER AMP
IC501
1
2
12
6
7
Q305
Q311
MUTE CONT
Q313,314
MUTE
Q581
PROTECT
DETECT
Q809,810
D502
MUTE
Q315
D315
MUTE CONT
Q503,504
MUTE CONT
Q511,512
Q330
+5.6V
PROTECT
CONT
Q805
PROTECT
SWITCH
Q806
PROTECT
SWITCH
Q813
6
7
IC303 (2/2)
7
5
1
3
1
3
IC306
IC303 (1/2)
MIX
JK691
PHONES
R CH
R CH
L
R
RY2
RY1
L
R
JK303
M961
(FAN)
(FAN)
SPEAKER
JK302
SUB
WOOFER
OUT
OVER LOAD
DETECT
Q501
POWER AMP
IC503
1
2
12
6
7
MUTE
Q513
15
14
10
11
D518
OVER LOAD
DETECT
Q505, 506
RELAY
DRIVE
Q807,808
RELAY
DRIVE
Q814
SPEANA
Q307
P01
P22
G01
G12
FLOURESCENT
INDICATOR TUBE
SYSTEM CONTROL
IC601(3/3)
VF
VF
FUCTION
KEY
VR ENCODER A
8
VR ENCODER B
7
REMOCON IN
27
VR601
VOLUME
ENCODER
X601
32.768kHz
FLD601
41
30
KEY INPUT 1
24
12 XT1
13
PROTECTOR SENSOR
84
HEADPHONE SENSOR
FUCTION
KEY
KEY INPUT 0
23
S621-626
FUCTION
KEY
KEY INPUT 2
25
S611-620
PWR/DISP SW
26
REMOTE
CONTROL
RECEIVER
RM601
T911
POWER
TRANSFORMER
(MAIN)
RELAY
DRIVE
Q901
RY901
VF
VF
RESET
1
3
IC602
D616
D615
S631-638
1
77
PWR LED
LED616
92
GAME MIX LED
LED615
91
GAME LED
LED611
85
TAPE LED
LED612
RECT
D541
D541
+B
-B
POWER
AMP
-30V REG
Q911
D902-905
+5.6V
REG
1
3
IC901
T901
POWER
TRANSFORMER
(SUB)
BU +5.6V
42
45
47
.
50
52
.
65
VACS
20
SPEANA IN L
21
S601
S602
DISPLAY
VOLUME
87
TUNER LED
LED614
86
CD LED
LED610
BU+5.6V
+5.6V
51
VPP
15 CF1
16
CF101
10MHz
XT2
CF2
D911
-30V
D542
D543
+12V
REG
3
1
IC802
+12V
+12V
UNREG
D801-804
+5.6V
REG
3
1
IC803
+5.6V
Q802
Q801
+5V
REG
3
1
IC804
CD +5V
+9V
REG
3
1
IC801
M +9V
CD +7V
D805-808
D809
D810
D810
P.S. RELAY
2
Q601
PWR DOWN 28
RESET 11
EVER +5.6V
T101
?/1
Q582,583
OVER HEAT
DETECTOR
+B
TH501
Q584
FAN SW
FAN
DRIVE
Q803
AC
IN
BUFFER
LPF
CN304
SUB
WOOFER
CONTROL
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