Aiwa XP-R210 AHA, Руководство по обслуживанию

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The LCD will change as follows.
Example: Test disc: TCD-782, DISC type select: CD-d, Judgement value: 7F, Measurement value: 3D BE.
Judgement value Measurement value
*All numerical values are displayed in HEX
What disc the IC has selected can be understood according to this judgment value.
The decision standard of IC is as follow.
LCD displays “CD-d” LCD displays “CD-r”
0 < Judgment value < 10 No disc No disc
10 < Judgment value < 32 CD-RW No disc
32 < Judgment value < C8 CD-DA and CD-R CD-RW
C8 < Judgment value CD-DA and CD-R
The state of the FE waveform can also be understood from this judgment value.
3. Confirmation of sled movement
By pressing the F. SKIP or B. SKIP button continuously when all LCD light up, it is possible to transfer the pick-up to either the outer circumfer-
ence or the inner circumference (the LCD is to remain all light up).
4. Confirmation of the RF level
Test point: RF and VC (Vref)
Test disc: TCD-782
Confirm that the RF waveform appears as shown below.
At 0.8Vp-p or greater
VOLT/DIV: 200mV
TIME/DIV: 0.5us
5. Confirmation of tracking balance
Test point: TE and VC (Vref)
Test disc: TCD-782
Press the DSL button while the test disc is playing and confirm that the traverse waveform is as is shown below.
VC
VOLT/DIV: 200mV
TIME/DIV: 2ms
6. Confirmation of each servo
It is possible to confirm the adjustment value of each servo by repeatedly pressing the MODE button while the test disc is playing. The
switchover sequence is as stated below.
Confirmation mode OFF -> Focus bias (FB) -> Tracking balance (TB) -> Tracking gain (TG) -> Tracking error offset (TEO) -> Focus gain (FG)
-> Focus error offset (FEO) -> Confirmation mode OFF
Example: Tracking error offset (TEO) Adjustment value: 03
Tracking error offset (TEO) display Adjustment value
*Adjustment values are displayed in HEX.
< TUNER SECTION >
1. DD converter clock adjustment
Settings : • Test point : Q204 Collector
• Ajustment location: TC208
Method : Set to AM603 kHz, 1404 kHz and adjust TC208
so that the test point becomes 360 kHz
±
1 kHz,
410 kHz
±
15 kHz.
2. AM VT Check
Settings : • Test point : TP1 (VT)
Method : Set to AM 531kHz and check that the test point is
1.0V
±
0.5V and set to AM 1602kHz and check the
test point is 6.5V
±
1.0V.
3. AM Tracking Adjustment
Settings : • Test point : HP OUT (VOLUME MAX)
• Adjustment location :
BAR ANTENA................................603kHz
TC801..............................................1404kHz
* Repeat this adjustment a few times until the wave
shape has the maximum amplitude.
4. AM IF Adjustment
IFT803.........................................999kHz
5. FM VT Adjustment(Lower side)
Settings : • Test point : TP(VT)
• Adjustment location : L801
Method : Set to FM 87.5MHz and adjust L851 so that the test
point becomes 1.5 ~ 2.0V.
6. FM Tracking Adjustment
Settings : • Test point : HPOUT (VOLUME MAX)
• Adjustment location :
L802................................................87.5MHz
* Repeat this adjustment a few times until the distortion
is minimum.
ADJUSTMENT
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