HCD-C770/C990
Ver 1.6
SECTION 6
ELECTRICAL ADJUSTMENTS
6.VERSION INFORMATIONAU TO SERVO ADJUSTMENTRF LEVEL CHECK
On the Test Mode Menu screen, selecting [6] displays the ROMAfter parts related to the servo circuit (RF amplifConnection:ier (IC001), DSP
version and region code.(IC401), motor driver (IC501), EEPROM (IC302) so on) are re-
The parenthesized hexadecimal number in version field isplaced, re-adjusting the servo circuit is necessary. Select OALL� atoscilloscope
checksum value of ROM.O1. DRIVE AUTO ADJUSTMENT� (Refer to page 25 in TEST
DVD board
MODE) and adjust DVD-SL (single layer), CD and DVD-DL (dual
layer).CN301 1 pin+
�
## Version Information ##CN301 3 pin
IF con.Ver.x. xxProcedure:
1. Connect an oscilloscope to test point 1 pin and 3 pin of
SYScon.Ver.x. xx (xxxx)CN301 on the DVD board.
ModelDAV-Cxxx2. Turn the power on.
Region0x3. Put the disc (LUV-P01) (Part No.: 4-999-032-01) (CD) in to
playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
Front End Ver.x.xxnal level is correct or not.
5. Put the disc (TDV-520CSO) (Part No.: J-2501-236-A) (DVD)
in to playback.
Exit: RETURN6. Perform confirmation in the same manner as step 4.
Note:A clear RF signal waveform means that the shape OE� can be clearly
IF con. : The version of system controller (IC901).distinguished at the center of the waveform.
SYScon. : The version of DVD system processor (IC206).
Front End : The version of mechanism controller (IC301).RF signal waveform
VO LT/DIV: 200 mV
TIME/DIV: 500 ns
7. VIDEO LEVEL ADJUSTMENT
On the Test Mode Menu screen, selecting [7] displays color bars
CD: 1.05 ? 0.2 Vp-p
for video level adjustment. During display of color bars, OSD dis-
DV D: 1.09 ? 0.2 Vp-p
appears but the menu screen will be restored if pressing the [RE-
TURN] key.
Checking Location:
� DVD Board (Component Side) �
CN301
7
1
3131 |
ACEC
SONY
