Sony HCD-G101 / MHC-G101 Service Manual ▷ View online
— 13 —
CD SECTION
Note:
1. CD Block is basically constructed 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 fol-
lowing checks.
lowing checks.
5. Adjust the focus bias adjustment when optical block is replaced.
Focus Bias Adjustment
RF Level Check
Procedure :
1. Connect oscilloscope to test point TP (RF) on CD DECODER
1. Connect oscilloscope to test point TP (RF) on CD DECODER
board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
3. Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
Note: Clear RF signal waveform means that the shape “
◊
” can be
clearly distinguished at the center of the waveform.
TP (RF)
CN12 (VC)
CN12 (VC)
CD DECODER
board
board
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
FEO
VC
–
+
Procedure:
1. Connect DC voltmeter to test point CN12 (FEO), (VC) on CD
1. Connect DC voltmeter to test point CN12 (FEO), (VC) on CD
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.
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
CD DECODER
board
board
CN12
DC voltmeter
R07
VR01
Focus Bias
Focus Gain
VR02
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 —
CN12
IC03
RF Level
IC01
FEO
VC
— 14 —
SECTION 5
DIAGRAMS
5-1. CIRCUIT BOARDS LOCATION
MAIN Board
DISC board
PANEL board
H/P board
SENSOR board
POWER TRANSFORMER board
SW (B) board
SW (C) board
MOTOR board
SW (D) board
SW (A) board
CD DECODER board
MOTOR (6P) (S) board
R/P SW board
— 15 —
— 16 —
5-2. BLOCK DIAGRAMS
— TUNER SECTION —
HCD-G101
FM
75 OHM
JK101
FM ANTENNA
L101
1
6
3
8
RF IN
IF
FRONT
END
IC101
MIX IN
OSC
T101
TC101,L102
TC101
L102
FM TRACKING
D103
D101
D104
FM OSC
AMP
Q102
L103
FM TUNING
VOLTAGE
TP1
(1/2)
(1/2)
VT
G
AM TUNING
VOLTAGE
FM TUNING
VOLTAGE
TP1 (1/2)
TC102
L104
MW
BAR ANTENNA
L.P.F
Q105,106
21
1
24
X101
7.2MHz
17
Q103
B+
B+
19
L103
FM IF
AMP
Q101
1
FM IF
CF102
10.7MHz
CF101
10.7MHz
AM TUNING
VOLTAGE
L105
L105
23
24
21
22
18
FM
TUNED
LEVEL
SFR101
6 10
7 15 16
12 13
20 11 12 13
14
2 3 4
8
CF104
10.7MHz
17
CF105
19kHz
19kHz
16
18
IF
G
TP1
(2/2)
(2/2)
7
2
T102
4
DI
CLK
CE
TU MUTE
TUNED
DO 1
ST/IN
14
15
AM IF
L OUT
R OUT
TU L
REC OUT
R CH
FM DET
MPX VCO
MPX IN
AF DET
ST IND
AM MIX
PL DET
PH DET
PH DET
SMET
AM/FM
TU LED
OSC
AFC
AM RF
OSC/FMSD
A
MAIN
SECTION
CE
DI
CLK
DO
FM ST
AM/FM
SD SPEED
L CTR
H CTR
SD/IN
AM IN
FM IN
FM B+
X OUT
X IN
PD 1
09
FM/AM MPX
IC102
• R CH is omitted
• Signal path
: FM
: AM
• Signal path
: FM
: AM
5
PLL
IC103
(Page 21)
TC102, L104
AM TRACKING
TUNED
SWITCH
Q107
REC MUTE
Q108,109
CF103
— 17 —
— 18 —
— CD SECTION —
HCD-G101
B+
4
1
2
5
6
10
DETECTOR
LASER DIODE
PD
LD
APC
Q01
Q01
LD ON
Q02
33
34
39
38
35
36
PD1
PD2
31
RF 0
FOCUS/TRACKING
SERVO, RF AMP
IC01 (1/2)
19
20
21
23
24
25
22
40
EI
VR02
VC
42
TEO
CN2
6
7
13
12
48
45
1
37
VC
2
1
CN12
FOCUS
TRACKING
RF LEVEL
VR01
TRACKING
COIL
DRIVE
VO3(+)
25
VO3(-)
18
17
FOCUS
COIL DRIVE
15
16
27
VIN4
VIN3
VO4(+)
VO4(-)
VO4(-)
TRACKING
COIL
FOCUS
COIL
2-AXIS
DEVICE
FOCUS/TRACKING
COIL DRIVE,
SPINDLE/SLED
MOTOR DRIVE
IC03
SLED MOTOR
DRIVE
6
12
11
•
SPINDLE
MOTOR
DRIVE
13
14
•
M
M
M102
SLED
SLED
MOTOR
M101
SPINDLE
MOTOR
4
16
15
15
14
SLED SERVO
IC01 (2/2)
SL O
SL M
SL M
SL P
24
OP
OUT
23
IN -
9
MUTE
22
8
23
14
13
15
16
17
36
RF
DIGITAL
PLL
EFM
DEMODULATOR
DIGITAL
FILTER
+
1BIT
DAC
DAC
NLPWM
LPWM
RPWM
NRPWM
DATA
SQCK
CLOK
SCOR
SQSO
SENS
70
69
78
77
R CH
D/A
INTERFACE
SERVO
AUTO
SEQUENCER
9
5
11
4
1
7
10
SUB CODE
PROCESSOR
CPU
INTERFACE
DIGITAL
CLV
CLOCK
GENERATOR
6
18
25
74
73
XLT01
33.8688MHz
S05
LIMIT
SWITCH
SPOA
2
6
7
4
TURN TABLE
MOTOR DRIVE
Q10,11,14,15
11
TURN TABLE
MOTOR DRIVE
CONTROL
8
9
TRAY MOTOR
DRIVER
Q06 - Q09
5
13
14
15
3
10
CONTROL
MUTE
E
POWER
SECTION
S01
OPTICAL PICK-UP
UP/DOWN DET
UP
DOWN
TRAY/TABLE
MOTOR
DRIVER,
REG CONTROL
IC02
+
-
CD L
DATA
SQCK
SQSO
SCOR
SENS
XLAT
COUNT
FOK
DI
CLK
STB
B. BOOST
UP
DOWN
C
MAIN
SECTION
MIX AMP
IC05
DIGITAL SIGNAL PROCESSOR, D/A CONVERTER, DIGITAL FILTER
IC04
CLKO
XLTO
DATO
SEIN
CNIN
FOK
FOK
XLON
XRST
MDP
XTA0
XTA1
MUTE
M
M
M103
TURN
TURN
TABLE
MOTOR
M104
TRAY
TRAY
MOTOR
T.T+
T.T-
DOWN
TRAY +
TRAY -
XRST
MUTE
B.BOOST
DATA I
CLOK
STB
CONTROL
UP
E
F
LD
PD
VC
ATSC
FEO
FEBIAS
TA M
TA O
FE M
FE O
XRST
FOK
C. OUT
SENS
DATA
XLT
CLK
OPTICAL PICK-UP BLOCK
A
C
B
D
E
F
7
VO2(+)
VO2(-)
VO1(+)
VO1(-)
VIN2
VIN1
•
•
Q13
• R CH is omitted
• Signal path
: CD
• Signal path
: CD
09
FOCUS
TRACKING
FOCUS
GAIN
XLAT
(Page 21)
(Page 23)
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