Aiwa XR-DV526 Service Manual page 34
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Also See for XR-DV526:
- Operating instructions manual (54 pages) ,
- Service manual (44 pages)
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ADJUSTMENT – 1 <TUNER / FRONT>
< TUNER SECTION >
1. Clock Frequency Check
Settings : • Test point :
Method :
Set to AM 1710kHz and check that the test point is
2160kHz ± 45Hz.
2. AM VT Check
Settings : • Test point :
Method :
Set to AM 1710kHz and check that the test point is
less than 8.5V. Then set to AM 530kHz and check that
the test point is more than 0.6V.
3. AM Tracking Adjustment
Settings : • Test point :
• Adjustment location : L951(1/3)
Method :
Set to AM 1000kHz and adjust L951(1/3) so that the
test point becomes maximum.
4. AM IF Adjustment
Settings : • Test point :
• Adjustment location :
L802 .................................................... 450kHz
5. FM VT Check
Settings : • Test point :
Method :
Set to FM 87.5MHz check that the test point is more
than 0.5V. Then set to FM 108.0MHz and check that
the test point is less than 8.0V.
6. FM Tracking Check
Settings : • Test point :
Method :
Set to FM 98.0MHz and check that the test point is less
than 9dBµV.
7. DC Balance / Mono Distortion Adjustment
Settings : • Test point :
• Adjustment location : L801
• Input level :
Method :
Set to FM 98.0MHz and adjust L801 so that the
voltage between TP3 and TP4 becomes 0V ± 300mV
with distortion less than 1.3%.
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TP2 (CLK)
TP1 (VT)
TP8 (Lch), TP9 (Rch)
TP8 (Lch), TP9 (Rch)
TP1 (VT)
TP8 (Lch), TP9 (Rch)
TP3, TP4 (DC)
60dBµV
– 34 –
8. Output Level Check
<AM>
Settings : • Test point :
• Input level :
Method :
Set to AM 1000kHz and check that the test point is
74mV ± 3dB.
<FM>
Settings : • Test point :
• Input level :
Method :
Set to FM 98.0MHz and check that the test point is
320mV ± 3dB.
9. FM Separation Check
Settings : • Test point :
• Input level :
Method :
Set to FM 98.0MHz and check that the test point is
more than 25dB.
< FRONT SECTION >
µ
10.
-CON Clock Adjustment
Settings : • Test point :
• Adjustment location : L331
Method :
Insert AC plug while pressing of "POWER" key and
"TUNER" function key.
Connect a frequency counter across TP10 and TP11.
Then adjust L331 so that the test point becomes
318.80Hz ± 0.32Hz.
[ Manual Reset ]
Make up for RESET after adjustment.
* Reset is to press "POWER" key while pressing of
"CLEAR (STOP)" key.
TP8 (Lch), TP9 (Rch)
74dBµV
TP8 (Lch), TP9 (Rch)
60dBµV
TP8 (Lch), TP9 (Rch)
60dBµV
TP10 (K-SCAN)
TP11 (GND)
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