Sony CFD-Z125 / CFD-Z135 Service Manual ▷ View online
— 21 —
Focus Bias Adjustment
This adjustment is to be done when the optical pick-up is replaced.
Procedure:
1. Connect the oscilloscope IC701 pin
#¡ and TP701 pin 2 on
the CD DECODER board.
2. Put the disc (YEDS-18.)
3. Put the set into test mode. (See page 20.)
4. Press ± and ≠ buttons to move the optical pick-up to the
3. Put the set into test mode. (See page 20.)
4. Press ± and ≠ buttons to move the optical pick-up to the
center. (Move the optical pick-up to the music area on the disc
to enable easy visibility of the eye pattern.)
to enable easy visibility of the eye pattern.)
5. Press the fl button.
From focus searching, focus is turned ON while entering
CLV drawing-in mode. Tracking and sled are turned OFF.
CLV drawing-in mode. Tracking and sled are turned OFF.
6. Press the fl button.
[Both tracking and sled are turned ON.]
7. Adjust VR701 so that the oscilloscope waveform is as shown in
the figure below. (eye pattern)
A good eye pattern means that the diamond shape (
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
8. Release the test mode after adjustment is completed.
Adjustment Location: CD DECODER board (See page 22.)
E-F Balance Adjustment
This adjustment is to be done when the optical pick-up is replaced.
Procedure:
1.
Connect the oscilloscope to TP702 pin
1 and pin 2 on the
CD DECODER board.
2.
Put the disc (YEDS-18).
3.
Put the set into test mode. (See page 20.)
4.
Press the ± and ≠ buttons to move the optical pick-up to
the center.
the center.
5.
Press the fl button.
From focus searching, focus is turned ON while entering
CLV drawing-in mode. Tracking and sled are turned OFF.
From focus searching, focus is turned ON while entering
CLV drawing-in mode. Tracking and sled are turned OFF.
6.
Adjust VR702 so that the oscilloscope traverse waveform is
symmetrical, as shown in the figure below.
symmetrical, as shown in the figure below.
Adjustment value: 0.3 to 0.7Vp-p (A+B)
7. Release the test mode after adjustment is completed.
Adjustment Location: CD DECODER board (See page 22.)
oscilloscope
(DC range)
CD DECODER board
TP702 pin
1
TP702 pin
2
0V
A
B
A=B
0V
A=B
A
B
VOLT/DIV: 0.2V (with the 10:1 probe in use.)
TIME/DIV:1ms
TIME/DIV:1ms
Note: Take long sweep time
for easy monitoring.
for easy monitoring.
oscilloscope
(AC range)
CD DECODER board
IC701 pin
#¡
TP701 pin
2
VOLT/DIV : 0.2V (with the 10:1 probe in use.)
TIME/DIV : 500ns
TIME/DIV : 500ns
0.8 to 1.8Vp-p
When observing the eye pattern, set the oscilloscope for AC
range and raise vertical sensitivity.
range and raise vertical sensitivity.
— 22 —
Adjustment Location:
[CD DECODER BOARD] (Component Side)
Focus Bias Adjustment
E-F Balance Adjustment
VR701
TP701
TP701
VR702
TP702
TP702
25 31 36
12
1
IC701
2
1
1
2
1
1
LCD801
SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
— 23 —
CD DECODER
board
board
LAMP board
(Z135)
(Z135)
MOTOR board
MAIN board
POWER board
SP TERMINAL board
FRONT board
BATTERY(A)
board
board
LEAF SW
board
board
SENSOR board
(Z135)
(Z135)
BATTERY(B)
board
board
6-2. BLOCK DIAGRAM
— 24 —
— 25 —
— 26 —
L1
FM RF
L2
FM OSC
L3
FERRITE-ROD
ANTENNA
ANTENNA
ANT901
FM
TELESCOPIC
18
20
22
19
24
FM
FRONT END
RF IN
FM RF
FM OSC
AM IN
AM OSC
16
FM/AM
FE OUT
BPF
AM
FRONT END
CF3
CF1
CF2
FL1
T1
AM-IFT
13
14
FM IF
AM IF
FM
MPX
FM/AM
BUFFER
REC
MUTE
PB
MUTE
FM
DET
AM
DET
6
5
R-CH
R-CH
26
IC1
FM/AM FRONT-END
FM/AM DET,FM MPX
27
15
T2
FM-IFT
RV1
OPTICAL PICK-UP
BLOCK
(KSC-213C)
LD/POWER
CONTROL
Q701,702
38
VCC
CD5V
A
VC
C
B
D
E
F
VC
LD
GND
A
C
B
D
E
F
FOCUS
COIL
F+
F
T+
T
TRACKING
COIL
33
34
39
36
35
48 VC
LD
E
F
PD1
PD2
6
23
24
21
20
19
22
31
25
14
13
15
13
17
25 18
8
36
23
SENS
RFO
69
NLPWM
70
2
3
1
LPWM
78
RPWM
FOK
C OUT
DATA
XLT
CLK
XRST
11
1
9
7
4
10
6
SCOR
MUTE
CLOK
DATA
SENS
SQSO
5
SQCK
73
XTA1
74
XTA0
XLAT
SEIN
RF
FOK
CNIN
DATO
SEIN
CLKO
MDP
SPOA(PICSW)
XRST
16
13
FEO
TAO
SLO
IC703(1/2)
FOCUS/TRACKING COIL
SLED/SPINDLE MOTOR
DRIVER
IC703(1/2)
SPINDLE MOTOR
DRIVER
IC701
CD RF/SERVO
PROSSESOR
15
25
V IN 3
16
17
18
VR
PD
PD
12
11
14
13
27
V IN 4
6
V IN 2
4
24
23
V IN 1
VO4 (+)
VO4 (–)
VO3 (+)
VO3 (–)
VO2 (+)
VO2 (–)
VO1 (+)
VO1 (–)
M
M
MOTOR
M702
SLED
SLED
MOTOR
M701
SPINDLE
S701
LIMIT
S302
R/P SW
S307
MOTOR SW
S301
PLAY SW
M601
(CAPSTAN/
REAL)
L-OUT
R-OUT
ST-IND
IC702
SIGNAL PROCESSOR
D/A CONVERTER
16
L4
AM OSC
20
21
CD L
R-CH
R-CH
R-CH
+7V
HRP901
REC/PB
REC/PB
HEAD
HE901
ERASE
HEAD
BIAS
OSC
OSC
Q303
IC301
PRE AMP
24
22
5
4
15
21
REC/PLAY TAPE
RADIO
CD
NAB NF1
REC
NAB AMP
26dB
8
3
19
1
7
5
11
9
15
13
OUT 1
TAPE
TAPE
L301
Q307
Q102, 103
Q101
Q301
8
AMP
VR
LOGIC CONTROL
7
5
4
DATA
CLK
STANDBY
VCC
AUDIO
MUTE
Q105
RADIO B+
SWITCH
Q314
11
1
12
IC303
POWER AMP
R-CH
PHONES
JK301
SP101
SP201
L
R
SPEAKER
S1
MUTE
BAND
REC AMP
AMP
BUFFER
7dB
17
RADIO/CD
IC302
VOLUME
IC351
GRAPHIC EQ.
22
XLON(LDON)
R-CH
77
NRPWM
11
8
12
7
52
53
54
39
3
1
CD
5
RESET
41
RADIO LED
45
40
49
50
17
TAPE
SYNC REC IN
SYSTEM MUTE OUT
CLK OUT
DATA OUT
SCOR
XRST
MUTE
DATA
SENS
SQSO
SEG1-17
XLAT
16
STEREO
9
SQCK
38
CDSW
56
57
57
27
|
34
KEY MATRIX
1-8
1-8
KEY SCAN
OUT 1,2
OUT 1,2
IC801
SYSTEM
CONTROL
14 FOK
XTL701
16.9344MHz
26
CF4.0MHZ
25
CF4.0MHZ
XTL801
4MHz
19
XTOUT32.768KHZ
20
XTIN32.768KHZ
XTL802
32.768kHz
78,75-60
COM1-4
2,1,80,79
LCD801
LIQUID CRYSTAL DISPLAY
S702
CD DOOR
SWITCH
Q315
SWITCH
Q313
SWITCH
Q705
CD B+
SWITCH
Q704
B+
SWITCH
Q311
REG
Q312
RECT
D901-D904
B+
SWITCH
Q308
B+
SWITCH
Q310
D307
LAMP
DRIVE
Q703
B+
ON/OFF
Q309
+5V
+5V
+5V
+7V
DRY BATTERY
SIZE"D"
(IEC DESIGNATIO R20)
6PCS,9V
T901
POWER
TRANSFORMER
LD354
OPR/BATT
B+
REG
IC304
3
1
RESET
IC802
REMOTE
CONTROL
RECEIVER
SEN851
D308
18
WP(REG CHK)
6
REM IN
PL701,702
•
SIGNAL PATH.
•
R CH : Same as L CH
:FM
:PB
:REC
:CD
:PB
:REC
:CD
J901
AC IN
4
AM
FM
FM
M
SWITCH
Q306
SWITCH
RV351
MEGA BASS
RV352
400Hz
RV353
1kHz
RV355
10kHz
RV354
4kHz
Q2
MUTE
SWITCH
KEY MATRIX
S851,853,855,857
S859,860,862,863
S865,866,868,869
S859,860,862,863
S865,866,868,869
CLOCK
MUTE
Q710
IC705
LPF
CD
MUTE
Q707
MUTE
SWITCH
Q706,709
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