AIWA XPSP910
Service Manual

What disc the IC has selected can be understood according to this judgment value. The decision standard of IC is as follows. 0 < Judgment value < 10 10 < Judgment value < 32 32 < Judgment value < C8 LCD displays �CD-d� No disc CD-RW CD-DA and CD-R LCD displays �CD-r� No disc No disc CD-RW CD-DA and CD-R

C8 < Judgment value The state of the FE waveform can also be understood from to this judgment. 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.

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 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

4. Confirmation of the RF level Test point: RF and VC (Vref) Test disc: TCD-782 Confirm that the RF waveform as shown below.

more than 0.8Vp-p

VOL

VOLT/DIV: 200mV TIME/DIV: 0.5 s

Tracking Error Offset (TEO)display

Adjustment value

Adjustment value are displayed in HEX. 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.

A

VC

B

A:B = 1:1 VOLT/DIV: 200mV TIME/DIV: 2ms

15