Sony DVP-S300 Training Manual page 24

First Generation DVD
The first generation Sony DVD player consisted of two models, the DVP-
S3000 and the DVP-S7000.
Symptom 5: No PB or Picture freezes when playing
parts on some dual layer (gold) discs.
Cause: 1. Laser getting weak.
2. ROM IC093 cannot PB marginal spec gold discs.
Repair procedure
You will measure the DVD RF level going to the servo (not video) stages
and use that level for making the laser performance judgement.
1. See service bulletin 47 to locate TP891 (same as CN886/pin 5). Less
than 0.95Vp-p means you should replace the optical assembly. Align
the unit for all three disc types (CD, DVD single and dual layer).
2. If the RF level is normal at approximately 1.5Vp-p, replace ROM IC093
as in service bulletin 43R2 depending upon the model.
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Alignment after laser replacement
The Tilt, focus, and Tracking adjustments are performed automatically
from the test mode using the remote and test discs. After the test mode is
accessed and "drive automatic adjustment" is entered, you are prompted
to load the first DVD disc for alignment. Afterwards the screen prompts
you to replace the disc with a dual layer DVD and then finally with a CD to
complete the alignment. The procedure is as follows:
•
Access the Test Mode by pressing the following buttons on the re-
mote: Time, Clear, then Power.
•
From the Test Mode Menu, select 1. Drive Auto Adjustment.
•
From the Auto submenu, select 0. All (discs – one at a time).
•
The screen will prompt you as to what disc to place on the tray and
what buttons to press to complete the alignment.