Sony RCD-W50C Service Manual page 49

4-6. VWDC Check
Select the menu as follows. Control → Macro, and select 06vwdc_S.ttl.
1)
Press "Open".
2) As prompted by the message shown in Fig. 4-51, remove the
disc from the tray and press "OK".
3) Because this step saves the result of electrical adjustment in a
file, there can be a case that the dialog as shown in Fig. 4-52
appears.
When you want to overwrite ..................... Press "Yes".
When you want to create a new file .......... Press "No".
4) Check that the message "CDRW VWDC-CHECK completed!"
appears. (Fig. 4-53)
NG Judgment Result Indication
4-6-1. EEPROM Write NG!
Contents : This message appears when writing data into EEPROM fails.
Measure : When the steps of 01ldp_S.ttl through 05cdrw_S.ttl have no problem and the error occurs only in this step, it is assumed that
an error has occurred momentarily in the interface between PC and CDM65. Therefore, repeat execution of 06vwdc_S.ttl
again.
4-6-2. VWDC judge [Line Top - End] [NG]
Contents : This message appears when the VWDC value is outside the specification.
Measure : It is assumed that the optical laser unit has deteriorated. If this error occurs after the KRM-220CAA is replaced, the adjustment
error in the step of 01ldp_S.ttl is assumed. Therefore, repeat execution of steps of 01ldp_S.ttl through 05cdrw_S.ttl again. In
the cases other than above, check if the laser power adjustment is correctly performed or not, using LDPtestL_S.ttl.
4 Fig. 4-51
4 Fig. 4-52
4 Fig. 4-53
RCD-W50C
49