Aiwa XP-SR311AU Service Manual page 11

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4. Confirmation of the RF level
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Test point: RF and VC (Vref)
Test disc: TCD-782
Confirm that the RF waveform as shown below.
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.
TE
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0.8Vp-p
VOLT/DIV: 200mV
TIME/DIV: 0.5 s
A
B
A:B = 1:1
VOLT/DIV: 200mV
TIME/DIV: 2ms
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6. Confirmation of each servo
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8
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 offif Focus Bias (FB) ⇒Tracking
Balance(TB) fiTracking 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 are displayed in HEX.
Q Q
VC
3 6 7 1 3 1 5
co
.
17
9 4 2 8
VOL
Adjustment value
0 5 8 2 9 9 4 2 8
m
9 9
9 9