– 30 –
< TUNER SECTION >
1. Clock Frequency Check
Settings : • Test point : TP2 (CLK)
Method : Set to AM 1710kHz and check that the test point is
2160kHz
±
45Hz.
2. AM VT Check
Settings : • Test point : TP1 (VT)
Method : Set to AM 1710kHz, AM 530kHz and check that the test
point is less than 8.0V (1710kHz) and more than
0.6V (530kHz).
3. AM Tracking Adjustment
Settings : • Test point : TP8 (Rch), TP9 (Lch)
• Adjustment location : L951 (1/3)
Method : Set to AM 1000kHz and adjust L951 (1/3) so that the
test point is maximum.
4. AM IF Adjustment
Settings : • Test point : TP8 (Rch), TP9 (Lch)
• Adjustment location :
L802 ................................................ 450kHz
5. FM VT Adjustment
Settings : • Test point : TP1 (VT)
• Adjustment location : L907
Method : Set to FM 108.0MHz and adjust L907 so that the test
point becomes 7.0V
±
0.05V. Then set to FM 87.5MHz
and check that the test point is more than 0.5V.
6. FM Tracking Adjustment
Settings : • Test point : TP8 (Rch), TP9 (Lch)
• Adjustment location : L904
Method : Set to FM 98.0MHz and adjust L904 so that test point is
maximum and distortion is minimum.
7. DC Balance / Mono Distortion Adjustment
Settings : • Test point : TP3, TP4 (DC Balance)
TP8 (Rch), TP9 (Lch) (Distortion)
• Adjustment location : L801
• Input level : 60dB
µ
V
Method : Set to FM 98.0MHz and adjust L801 so that the
distortion is less than 1.3%. Then check that the voltage
between TP3 and TP4 is 0V
±
0.5V.
ADJUSTMENT <TUNER / FRONT>
< FRONT SECTION >
1.
µ
-CON OSC Adjustment
Settings : • Test point : TP1 (K-SCAN) and GND
• Adjustment location : L101
Method : Insert AC plug while pressing ECO key. Adjust L101
so that the frequency at the test point becomes
78.4Hz
±
0.08Hz (12.742ms ~ 12.768ms).
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
