AVD-C70ES
US Model
Canadian Model
SERVICE MANUAL
Ver 1.3 2004. 09
SUPPLEMENT-2
File this supplement with the service manual.
Subject :Addition of Electrical Adjustments.
ELECTRICAL ADJUSTMENTSProcedure:
Note:1. Connect an oscilloscope to test point 1 pin and 3 pin of CN901
1. VIDEO board is basically designed to operate without adjustment.on the DVD board.
Therefore, check each item in order given.2. Turn the power on.
3. Put the disc (LUV-P01) (Part No.: 4-999-032-01) (CD) in to2. Use DVD reference disc unless othermise indicated.
[DVD reference disc]
playback.LUV-P01 (CD): PART No. 4-999-032-01
4.Confirm that oscilloscope waveform is clear and check RFTDV-520CSO (DVD-SL) : PART No. J-2501-236-A
signal level is correct or not.TDV-540C (DVD-DL): PART No. J-2501-235-A
Note: Do not use exiting test disc for DVD.5. Put the disc (TDV-520CSO) (Part No.: J-2501-236-A) (DVD)
3. Use an oscilloscope with more than 10 M& impedance.in to playback.
4. Clean the object lens by an applicator with neutral deter6.Perfgent when theorm Comfirmation in the same manner as step 4.
signal level is low than specified value with the folloNote:wing cA clear RF signal whecks.aveform means that the shaE� can be clearlpe Oy
distinguished at the center of the waveform.
1. AUTO SERVO ADJUSTMENT
After parts related to the servo circuit (RF amplifier (IC001),RF signal waveform DSPVOLT/DIV : 200 mV
(IC1025), motor driver (IC1024), EEPROM (IC1028) so on) are
replaced, re-adjusting the servo circuit is necessary. Select OALL�TIME/DIV : 500 nS
at O1. DRIVE AUTO ADJUSTMENT� (Refer to service manual
page 16 in TEST MODE) and adjust DVD-SL (single layer), CDCD : 1.05 ? 0.2 Vp-p
DVD : 1.09 ? 0.2 Vp-p
and DVD-DL (dual layer).
2. DECISION TO PASS OR FAIL OF THE OPTICAL
PICK-UP BLOCK
Checking Location:
� DVD BOARD (SIDE A) �Connection:
oscilloscope
DVD board
CN301 pin 1+
CN301 pin 3�
CN3017
1
9-874-155-821 |
ACEC
