Aiwa XP-SP910, Руководство по обслуживанию

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What disc the IC has selected can be understood according to this judgment value.
The decision standard of IC is as follows.
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 to this judgment.
Adjustment value are displayed in HEX.
VOL
Tracking Error Offset (TEO)display Adjustment value
6. Confirmation of each servo
It is possible to confirm the adjustment value of each servo by
repeatedly pressing the MODE button while the disc is play-
ing, 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
5. Confirmation of Tracking balance
Test point: TE and VC (Vref)
Test disc: TCD-782
Press the DSL button while the test disc playing and confirm the
TE waveform is as is shown below.
4. Confirmation of the RF level
Test point: RF and VC (Vref)
Test disc: TCD-782
Confirm that the RF waveform as shown below.
3. Confirmation of Sled movement
By pressing the F. SKIP of B. SKIP button continuously, it is
possible to transfer the pick-up to either the outer side or inner
side.
more than
0.8Vp-p
VOLT/DIV: 200mV
TIME/DIV: 0.5 s
VOLT/DIV: 200mV
TIME/DIV: 2ms
A
VC
B
A:B = 1:1