Sony HCD-GRX40AV / HCD-RXD6AV / MHC-GRX40AV / MHC-RXD6AV Service Manual ▷ View online
17
FM Tuned Level Adjustment
Procedure:
1.
1.
Supply a 28 dB 98 MHz signal from the ANTENNA terminal.
2.
Tune the set to 98 MHz.
3.
Adjust SFR101 to the point (moment) when the TUNED
indicator will change from going off to going on.
indicator will change from going off to going on.
Adjustment Location: MAIN board
Adjustment Location
[MAIN BOARD] Component side
FM RF SSG
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75 W open)
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75 W open)
FM ANTENNA terminal
(JK101)
(JK101)
set
L104
TC101
TP1
SFR101
L107
FM Tuned Level
AM Tuning
Voltage
Voltage
AM Tracking
JK101
18
CD SECTION
Note:
1.
CD Block is basically constructed to operate without
adjustment. Therefore, check each item in order given.
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
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.
when the signal level is low than specified value with the
following checks.
5.
Adjust the focus bias adjustment when optical block is replaced.
RF Level Check
Procedure :
1.
1.
Connect oscilloscope to test point TP (RF) on CD DECODER
board.
board.
2.
Turned Power switch on.
3.
Put disc (YEDS-18) in and playback.
4.
Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
signal level is correct or not.
Note: Clear RF signal waveform means that the shape “
◊
” can be
clearly distinguished at the center of the waveform.
Adjustment Location:
[CD DECODER BOARD] Component side
CD DECODER
board
board
oscilloscope
TP (RF)
TP (VC)
TP (VC)
VOLT/DIV: 200 mV
TIME/DIV: 500 nS
TIME/DIV: 500 nS
level: 1.0 Vp-p
+0.3
–0.2
–0.2
IC702
IC701
J778
J789
TP (VC)
TP
(RF)
CN701
HCD-GRX40AV/RXD6AV
19
19
7-1. BLOCK DIAGRAMS
TUNER/CD SECTION
CE
16
10
6
4
5
3
22
1
PLL
IC103
FM
XO
XI
CLK
DI
DO
CE
CLK
DI
DO
OPTICAL PICK-UP
BLOCK
APC
Q701
41
+5V
VC
LD
GND
A
C
B
E
F
FOCUS
COIL
F+
F
T+
T
TRACKING
COIL
36
37
42
39
38
51
APC
FOCUS PHASE
COMPENSATION
DECODER
SERIAL/
PARALLEL
CONVERTER
FE
AMP
RF
AMP
IIL
TTL
TTL
IIL
COMAND
VC
TRACKING PHASE
COMPENSATION
LD
PD
E
F
PD1
PD2
6
25
24
21
20
23
22
33
27
SENS1
RFO
FOK
C OUT
DATA
XLT
CLK
XRST
13
FEO
TAO
IC703
T.T/TRAY MOTOR
DRIVER
CD RF/SERVO
PROSSESOR
IC701 (1/2)
2
5
T IN
1
3
4
VR
PD
PD
18
17
19
20
6
F IN
22
SL IN
13
T.T F IN
F+
F
T+
T
SL+
SL
SP+
SP
M
M
MOTOR
M102
SLED
SLED
MOTOR
M101
SPINDOL
EFM
DEMO.
XRST
CLV
SERVO
DIGITAL
CLV
D/A
I/F
SUB CODE
PROSSESOR
CPU I/F
7
9
4
5
6
62
57
MDP
SENS
SCOR
SQSO
SQCK
CLOK
D
ATA
CLK
XLT
DAT
SE
CIN
FOK
RF
SERIAL
I/F
PWM
67
70
71
NL
XTA1
XTA0
X701
SYS M
R-CH
CD DIGITAL
SIGNAL PROCESSOR
IC702
16
:FM
:CD
• SIGNAL PATH
14
7
8
4
2
1
6
10
DETECTOR
16
OSC
FM
JK101
3
8
RF
MIX
1
4
FM FRONT END
FE101
RF IF
AMP
Q101
CF101
10.7MHz
CF102
10.7MHz
L107
MW OSC
L104
AM ANT
AM RF
AMP
MPX
16
FM IF
1
OSC
23
AFC
22
AM RF
21
FM
IF
FM OUT
19
FM
DET
AM/FM
IF BUFF
AM
OSC
AM
MIX
AM
DET
SMET
20
CF103
450kHz
MUTE
AGC
AM
IF
DECODER
13
L
14
R
4
2
T102
AM IFT
8
FM DET
CF104
10.7MHz
R CH
FM/AM MPX
IC102
FM
TUNED
LEVEL
PD1
18
X201
7.2MHz
FM B+
7
TUB+
+12V
Q103
ST MONO
12
15
AM
OSC/FMSD
24
B+
11
SD IN
9
ST/MONO
TU LED
6
12
IF IN
SD SPEED
7
ST IND
10
AM/FM
MUTE
Q109
TU L
ST IND
TU MUTE
DO
A
MAIN
SECTION
(Page 20)
(Page 20)
D
5
LD
PD
F/T COIL
SL/SP MOTOR
14
15
30
31
T.T+
T.T
TR+
TR
M
M
MOTOR
T/T
MOTOR
TRAY
21
SP IN
29
TR F IN
12
T.T R IN
28
TR T IN
27
MUTE IN
IC705
IC701 (2/2)
6
7
REG
Q703
9
REG I
10
REG B
11
REG OUT
7
VCC
8
VCC
+5V
B+
XRST
6
CONTROL
11
CONTROL
5
SWITCH
Q702
13
12
TR+
TR
7
14
T.T+
T.T
4
MUTE
3
CLOK
1
STB
IC704
MOTOR DRIVE
REG CONTROL
REG CONTROL
T.T/TRAY
35
18
11
10
12
13
14
79
21
15
SPOA
STOP
SWITCH
S05
8
XLA
T
CLOCK
GEN.
PWM
74
NR
MUTE
Q705,707
CD L
SCOR
SENS1
SQSO
XLAT
SQCK
DATA
CE
STB
CLK
DI
C
MAIN
SECTION
(Page 20)
(Page 20)
:AM
• RCH is omitted
SFR101
SENS2
LOCK
VT
2
DATA
26
SENS2
19
LOCK
16.9344MHz
2
L MUTE
53
D OUT
DIGITAL
OUT
PH701
B
MAIN
SECTION
(Page 20)
(Page 20)
CLK
DATA IN
Q104
D105
8
AM/FM
PH DET
11
AM
TC101
SECTION 7
DIAGRAMS
HCD-GRX40AV/RXD6AV
20
20
MAIN SECTION
HP901
PB
HEAD
DECK A
HRP901
REC/PB
HEAD
DECK B
R CH
R CH
R CH
PLAY/REC
CONTROL
CONTROL
Q203, 205
PLAY/REC
CONTROL
DRIVE
Q207
PLAY/REC
CONTROL
CONTROL
D201
L201
BIAS OSC
BIAS
OSC
OSC
Q251
HE901
ERASE
ERASE
HEAD
R CH
1
2
9
3
REC OUT
PB OUT
A/B
5
19
11
10
REC/PB
EQ AMP
IC201
TAPE A/B
Q213
MUTE
AMS
Q210,211
D418
D419
D202
: FM
: CD
• Signal Path
• RCH is omitted
C
CD
SECTION
(Page 19)
TU L
ST IND
TU MUTE
DO
Q513
4
PROTECT
DET
1
2
6
IC503
RL401
SPEAKER
JK401
SCOR
SENS1
SQSO
XLAT
SQCK
CLK
DI
CLK
CE
STB
11
STB
21
CE
25
SCLK
27
SDA
TA
OUT
24
D
ATA
22
SQCK
20
XLA
T
23
SQSO
42
SENS1
4
SCOR
26
SDA
TA
IN
Q411
MUTE
SWITCH
Q603,604
62
TU MUTE
28
FM ST IND
15
CLOCK
63
SYSTEM MUTE
64
POWER SW
19
LA
TCH
XT
AL
40
XT
AL
39
VR UP
52
X601
10MHz
VR DOWN
53
VR601
VOLUME
PIC UP
46
PIC DOWN
47
TRA
Y OPEN
50
TRA
Y CLOSE
51
TURN T
ABLE
49
DISC COUNT
48
A
B
S02
TRAY
OPEN/CLOSE
S03
DISC
COUNTER
S04
TURNTABLE
OPERATION
OPERATION
S01
CD DECK
UP/DOWN
KEY
MATRIX
P1
P24
KI0
KI2
FLD601
FLD DISPLAY
SYSTEM CONTROLLER/
FLD DRIVER
IC601
+5.6V
REG
Q401
SITCHING
Q103
TU +5V
+12V
+7.5V
REG
Q502
CD +7.5V
+12V
REG
Q501
RECT
D501-504
AC OFF
DET
Q509
Q510
RECT
D403
-VCC1
+VCC1
-27V
REG
REG
Q406
-27V
AC
IN
T001
AC4.8V
AC4.8V
16
A
TUNER
SECTION
(Page 19)
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
Q207
Q201
CE
CLK
DI
12
LOCK
MUTE
Q208,209
BIAS
SWITCH
Q252,253
6
TAPE (L)
13
TUNER (L)
12
CD (L)
11
B
CD
SECTION
(Page 19)
CD L
LINE AMP
IC301
6
L OUT
BUS REGISTER
IC602
REC MUTE
13
A/B
11
BIAS
12
REC
14
DI
2
CLK
3
STB
1
DI
CLK
SCL
30
4
PLAY
5
SOL A
6
SOL B
SOL A
DRIVE
Q610,613
M+12V
SWITCH
Q608,611
+12V
SOL B
DRIVE
Q609,612
SHIFT REGISTER
IC603
CK
2
S/L
1
QH
9
CLK
3
B REC FWD
5
PHOTO A
11
A MODE SW
13
A HALF
6
PHOTO B
12
B MODE SW
14
B HALF
MECHA
BLOCK
SFR501
MOTOR H/L
D515
+5.6V
65 88
29 31
G1
G13
Q'S
10
DATA IN
DATA
SENS2
LOCK
13
CLOK
43
SENS2
37
AMS
10
S/L
9
DA
TA
IN
L
R
MD/VIDEO
JK301
R CH
MD (L)
14
: MD
15
MUX OUT
AMP
Q303
DET
IC304
4
B REC REV
Q407
Q301
MUTE
Q419
MUTE
L
R
MD/VIDEO
JK301
R CH
µ
CON B+
CD +5V
D602
D601
RESET
SWITCH
POWER
DOWN DET
Q601
Q602
2
3
RM601
REMOTE
CONTROL
RECEIVER
RESET
38
POWER DOWN
6
REMOTE
8
VCC
VCC
2
1 . 100 90
.
57
DOLBY ON/OFF
32
V
ACS
36
SPEANA 4
SPEANA
35
SPEANA 3
34
SPEANA 2
33
SPEANA 1
LED DRIVE
IC701
2
3
4
DI
CLK
LED706-713
LED DRIVE
IC702
3
4
LED
DRIVE
DI
CLK
Q703-708
LED714-718
LED701-703
15
2
12
LED
DRIVE
Q701,702
LED704
11
14
13
5
9
.
.
16
15
11
5
9
18
LA
TCH
C MUT
R MUT
17
D
ATA
SDA
1
16
IN L
L IN
57
L OUT
1
DATA
14
REQ
16
SCK
15
DATA
SCK
DOLBY PROLOGIC
SURROUND DECODER
IC302
3
C VOL
8
S VOL
IC303B
IC303A
Q312
Q314
MUTE
Q313
Q315
MUTE
Q308
Q310
61
MD MUTE
58
DOLBY HI
16
CE
60
2CH OUT
IC501
IC501
10
6
MUTE
DBFB
DBFB
IC502
IC306
IC305
14
7
7
14
OVER LOAD
DETCTER
Q512
OVER LOAD
DETCTER
Q503
OVER LOAD
DETCTER
Q505
OVER LOAD
DETCTER
Q504
OVER LOAD
DET SWITCH
Q515
OVER
HEAT
Q516
+VCC1
PROTECTOR
Q412
SWITCH
SWITCH
Q413
RELAY
DRIVE
DRIVE
Q414
RELAY
DRIVE
DRIVE
Q415
RL402
L
R
REAR
JK402
CENTER
PHONES
JK403
R CH
+12V
JK303
SUB WOOFER
BUFFER
Q317
Q318
MUTE
IC304
FAN
DRIVE
Q508
FAN
CONTROL
Q305,517
FAN
+7.5V
SWITCH
Q405
AU +12V
-12V
REG
REG
Q403
-12V
S701-714
S718-728
S731-736
S718-728
S731-736
CD ENCODER A
54
CD ENCODER B
55
VR602
CD ENCODER
A
B
D510
D516
LED705
R CH
R CH
D305
D306
R CH
D417
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