– 24 –
< CD SECTION >
1. Focus Bias Adjustment
Make the focus bias adjustment when replacing and repairing
the optical block.
1) Connect an oscilloscope to the test point TP3 (RF) and TP4
(VREF).
2) Turn on the power switch.
3) Insert test disc TCD-782 (YEDS-18) and play back the second
composition.
4) Adjust SFR430 so that RF signal of the test point TP3 (RF) is
MAX and CLEAREST.
Oscilloscope
(DC range)
TP3 (RF)
TP4 (VREF)
+
-
EYE PATTERN
must be CLEAR and MAX
MAX
VOLT / DIV: 200mV
TIME / DIV: 0.5
µ
s
0V
ADJUSTMENT <TUNER / DECK / CD>
< RADIO SECTION >
1. AM Frequency Range Adjustment
•
Test Point: TP5 (LCH), TP6 (RCH)
•
Adjustment location: L006, TC003
•
Method:
L006 ....................................................................... 517kHz
TC003 ................................................................... 1750kHz
2. AM Tracking Adjustment
•
Test Point: TP5 (LCH), TP6 (RCH)
•
Adjustment location: L003, TC004
•
Method:
L003 ....................................................................... 600kHz
TC004 ................................................................... 1400kHz
3. AM IF Adjustment
•
Test Point: TP5 (LCH), TP6 (RCH)
•
Adjustment location: L007
•
Method:
L007 ....................................................................... 455kHz
4. FM Frequency Range Adjustment
•
Test Point: TP5 (LCH), TP6 (RCH)
•
Adjustment location: L005, TC001
•
Method:
L005 ........................................................................ 87MHz
TC001 .................................................................... 109MHz
5. FM Tracking Adjustment
•
Test Point: TP5 (LCH), TP6 (RCH)
•
Adjustment location: L004, TC002
•
Method:
L004 ........................................................................ 88MHz
TC002 .................................................................... 108MHz
6. FM IF Adjustment
•
Test Point: TP5 (LCH), TP6 (RCH)
•
Adjustment location: L008, L009
•
Method:
L008, L009 ........................................................... 10.7MHz
< TAPE RECORDER SECTION >
1. Bias Adjustment
•
Test tape: TTA-630
•
Test Point: TP2
•
Adjustment location: L801
•
Method:
L801 .............................................................. 85kHz
±
2kHz
2. Azimuth Adjustment
Condition: • Test tape: TTA-320
• Test point: PHONE JACK
• Adjustment location: Azimuth adjustment
screw
Method:
Play back the test tape and adjust the screw so that the
output is maximum.