Sony HCD-GRX3 / HCD-R300 / HCD-RX55 / MHC-GRX3 / MHC-R300 / MHC-RX55 Service Manual ▷ View online
— 13 —
IC03
VR02
VR01
R07
IC01
CN12
Focus Gain
Focus Bias
RF Level
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.
Focus Bias Adjustment
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.
oscilloscope
level: 1.0 Vp-p
VOLT/DIV: 200 mV
TIME/DIV: 500 nS
TIME/DIV: 500 nS
+0.3
–0.2
–0.2
Adjustment Location: CD DECODER board
Procedure:
1.
1.
Connect DC voltmeter to test point CN12 (FEO), (VC) on CD
DECODER board.
DECODER board.
2.
Turned Power switch on.
3.
Put disc (YEDS-18) in and stop.
4.
Adjust VR01 so that the DC voitmeter reading is 0 ± 20 mV.
Adjustment Location: CD DECODER board
Focus Gain Adjustment (VR02)
This gain has a margin, so even if it is slightly off.
There is no problem.
Therfore, do not perform this adjusment.
Please note that it should be fixed to mechanical center position
when you moved and do not know original position.
There is no problem.
Therfore, do not perform this adjusment.
Please note that it should be fixed to mechanical center position
when you moved and do not know original position.
Adjustment Location
[CD DECODER BOARD] — Component side —
CD DECODER
board
board
CN12
FEO
VC
DC voltmeter
+
–
CD DECODER
board
board
TP (RF)
CN12 (VC)
CN12 (VC)
— 14 —
SECTION 5
DIAGRAMS
5-1. CIRCUIT BOARDS LOCATION
SW (C) board
SW (D) board
SW (B) board
CD BUTTON board
PANEL board
VOLUME board
FUSE board
AMP board
MAIN board
MOTOR board
MOTOR (6P) (S) board
SW (A) board
CD DECODER board
DECK board
HCD-GRX3/RX55/R300
5-2. BLOCK DIAGRAMS
— DECK SECTION —
— 15 —
— 16 —
HP901
PB
HEAD
TAPE B
HRP901
REC/PB
REC/PB
HEAD
TAPE A
R CH
R CH
R CH
PLAY/REC
CONTROL
CONTROL
Q203,205
PLAY/REC
CONTROL
CONTROL
DRIVE
Q207
AMS
MUTE
Q551,552
PLAY/REC
CONTROL
CONTROL
D201
L251
BIAS OSC
BIAS
OSC
OSC
Q251
HE901
ERASE
HEAD
R CH
1
2
9
3
REC OUT
PB OUT
A/B
5
19
11
10
REC/PB
EQ AMP
IC201
Q251
D202
: FM
: CD
• Signal Path
• RCH is omitted
B
CD
SECTION
TU L
11
9
10
ST IND
TU MUTE
DO
CD L
12
CONTROL
3
2
1
CLK
14
DI
15
CE
13
SELECTOR
IC301
CLK
DI
CE
LINE AMP
IC303
1
3
Q709
MUTE
1
10
4
POWER AMP
IC401
SPEAKER
RELAY
DRIVE
Q706
Q708
1
2
6
IC402
RL701
R CH
SPEAKER
PHONES
JK302
JK303
SCOR
SENS
SQSO
XLAT
SQCK
DATA
DI
CLK
CE
STB
26
STB
21
CE
22
CLK
23
DO
52
FOK
53
COUNT
18
D
ATA
19
SQSO
51
SENS
38
SCOR
24
DI1
MUTE
DRIVE
Q410
Q604
MUTE
MUTE
SWITCH
Q603
4
TU MUTE
47
FM ST
IND
3
SYSTEM MUTE
2
POWER
LED DRIVE
IC603
36
ALA
TCH
13
LED
DRIVE
DI
CLK
Q608-613
RESET
SWITCH
POWER
DOWN DET
Q601
10
RESET
15
POWER DOWN
Q602
LED606-611
LED601-604
Q602
D602
X2
11
X1
12
VR UP
44
X601
4.19MHz
VR DOWN
45
VR601
VOLUME
PIC UP
55
PIC DOWN
56
TRA
Y
OPEN
59
TRA
Y
CLOSE
60
TURN T
ABLE
58
DISC COUNT
57
A
B
S02
TRAY
OPEN/CLOSE
DET
S03
DISC
COUNTER
DET
S04
TURNTABLE
OPERATION
OPERATION
DET
S01
CD DECK
UP/DOWN
DET
3
2
Q601
RM601
REMOTE
CONTROL
RECEIVER
39
REMOTE
64
78
KEY
MATRIX
S601-628
P1
P21
100
86
G1
G15
. 81
85
33
29
KI0
KI4
FLD601
FLD DISPLAY
SYSTEM CONTROLLER/
FLD DRIVER
IC601
+5.6V
REG
Q409
SITCHING
Q415,416
+11.5V
(SWITCHED)
+11.5V
FILTER
Q403
+7.5V
REG
Q702
+7.5V
+12V
REG
REG
Q701
RECT
D705-708
P MUTE
CONT
Q713
AC OFF
DET
Q714
D718
D720
RECT
D701
-12V
-30V
+30V
-27V
REG
Q703
-27V
VOLTAGE
DOUBLER
D731,732
AC
IN
PT001
AC3.4V
AC3.4V
12
16
A
TUNER
SECTION
: PB (DECK A)
: PB (DECK B)
: REC (DECK A)
Q201
BIAS
SWITCH
CONTROL
SWITCH
Q208,209
Q252,253
+12V
REC
MUTE
Q213
6
TAPE A/B
MIX OUT
MD L
JK301
LINE
OUT L
9
8
6
IC302 (2/2)
11
10
12
IC302 (1/2)
Q417
Q301
62
SERI MUTE
6
T
APE REC
61
AMS
BUS REGISTER
IC501
14
REC
12
BIAS
11
A/B
13
REC MUTE
2
S/I
3
CLK
10
Q'S
1
STB
DECK STB
43
MOTOR
B+ SW
Q501,502
SOL B
DRIVE
Q503,504
DO
CLK
SHIFT REGISTER
IC502
2
MTR +12V
9
QH
1
S/L
DECK DATA
42
DECK S/L
41
SOL A
DRIVE
Q505,506
PLAY
4
SOL A
5
SOL B
6
+12V
F REC
3
R REC
4
PHOTO A
5
PHOTO B
6
A MODE
11
B MODE
12
A HALF
13
B HALF
14
HALF B
HALF A
MODE B
MODE A
PHOTO B
PHOTO A
REC REV
REC FWD
SOL B
SOL A
SOL B
MOTOR H
MOTOR L
TAPE
SPEED
SFR 501
MECHA BLOCK
12
17
CE
CLK
DO
LED
DRIVE
Q606,607
10
5
LED DRIVE
IC602
2
3
4
11
12
LED605
1
3
2
Q605,615
SW
MODE
13
+5.6V
SW101
10k
9k
JOG A
49
JOG B
50
VR612
MULTI JOG
A
B
4
L
T
COM
SURROUND
CONTROL
Q307
Q310
5
SURROUND
4
3
2
Q331
HIGH
HIGH
Q308
NORMAL
7
DBFB NORMAL
8
DBFB HIGH
HP AMP
IC401
Q408
MUTE
SP
DET
Q404
+12V
-12V
REG
Q401
: MD
17
SQCK
20
XLA
T
COUNT
FOK
HCD-GRX3/RX55/R300
— TUNER/CD SECTION —
— 17 —
— 18 —
CE
19
12
5
3
4
2
24
1
PLL
IC103
FM
XO
XI
CLK
DI
DO
CE
CLK
DO
DI
OPTICAL PICK-UP
BLOCK
APC
Q01
38
+5V
VC
LD
GND
A
C
B
E
F
FOCUS
COIL
F+
F
T+
T
TRACKING
COIL
33
34
39
36
35
48
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
24
23
20
19
22
21
31
25
SENS
RFO
FOK
C OUT
DATA
XLT
CLK
XRST
13
FEO
TAO
IC03
T.T/TRAY MOTOR
DRIVER
CD RF/SERVO
PROSSESOR
IC01 (1/2)
4
5
T IN
3
2
1
VR
PD
PD
18
17
20
19
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
9 11 5
4
7
6
1
MDP
SENS
SCOR
SQSO
SQCK
CLOCK
D
ATA
CLK
XLT
DAT
SE
CN
FOK
RF
SERIAL
I/F
PWM
PWM
61
70
69
73
74
D OUT
NL
L
XTA1
XTA0
X701
MUTE
VDD
R-CH
D IN
GND
2
3
1
+5V
OPTICAL
DIGITAL
OUT
PH01
CD DIGITAL
SIGNAL PROCESSOR
IC703
16
:FM
:CD
:DIGITAL OUT
• SIGNAL PATH
14
7
8
4
2
1
6
10
DETECTOR
16
OSC
FM
75
Ω
AM
ANTENNA
JK101
D105
L101
FM ANT
L102
FM RF
3
1
RF
MIX
6
8
FM FRONT END
IC101
RF IF
AMP
Q101
CF101
10.7MHz
T101
CF102
10.7MHz
FM OSC
AMP
Q102
D106
L103
L105
MW OSC
IF
G
VT
AM/FM
TUNING
VOLTAGE
TP1
L104
AM ANT
AM RF
AMP
Q108
MPX
16
FM IF
1
OSC
23
AFC
22
AM RF
21
FM
IF
AF DET
18
FM
DET
AM/FM
IF BUFF
AM
OSC
AM
MIX
AM
DET
SMET
20
CF103
450kHz
MUTE
AGC
AM
IF
DECODER
14
L
15
R
4
2
T102
AM IFT
8
FM DET
17
MPX VCO
CF104
10.7MHz
CF105
19kHz
R CH
FM/AM MPX
IC102
L.P.F
Q112,113
FM
TUNED
LEVEL
PD1
21
X101
7.2MHz
FM B+
17
TUB+
B+
Q114
PL
DET
13
18
AM
OSC/FMSD
24
B+
7
SD
PH DET
11
PH DET
12
14
ST/MONO
TU LED
6
13
AM/FM
SD
15
L CTR
16
R CTR
7
ST IND
10
AM/FM
MUTE
Q117
TU L
ST IND
TU MUTE
DI
A
MAIN
SECTION
D
5
LD ON
SWITCH
Q02
LD
PD
F/T COIL
SL/SP MOTOR
CN12
CN2
ATSC
45
FEO
1
TEO
42
FOCUS
TRACKING
37
40
FE BIAS
EI
RV01
FOCUS
GAIN
RV02
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
IC06
IC01 (2/2)
6
7
REG
Q11
9
REG I
10
REG B
11
REG OUT
7
VCC
8
VCC
+5V
+7.5V
XRST
6
SPEED
11
CONTRL
5
SWITCH
Q04
13
14
TR+
TR
7
14
T.T+
T.T
4
MUTE
2
DATA
3
CLOK
1
STB
IC02
MOTOR DRIVE
REG CONTROL
T.T/TRAY
36
23
14
13
15
16
17
8
25
18
SPOA
LIMIT
SWITCH
S05
10
XLA
T
CLOCK
GEN.
PWM
PWM
77
78
NR
R
22
XLON
1
3
2
IC05
MIX AMP
MUTE
Q311
CD L
SCOR
SENS
SQSO
XLAT
SQCK
DATA
CE
STB
CLK
DO
B
MAIN
SECTION
(Page)
:AM
• R CH is omitted
SFR101
COUNT
FOK
CLK
DO
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