Adjustment Procedure (Dvd Section); Required Tools And Equipment; Necessity Of Adjustment; Storing And Handling Test Discs - Panasonic SA-HT833VP Service Manual

SA-HT833VP

12 Adjustment Procedure (DVD Section)

12.1. Required Tools and Equipment

Purpose of Use
Tilt adjustment DVD test disc
TORX screw driver (T6)
Others Hanarl
Grease
Drysurf
Checking CD test disc
VCD test disc
Recovery disc

12.2. Necessity of Adjustment

12.2.1. Necessity of Optical Adjustment
· Before starting optical system adjustment, be sure to wear proper protection gear against static electricity.
· Optical adjustment (optical pickup tilt adjustment) is required after following parts are replaced:
1. Optical pickup
2. Spindle motor assembly
3. Optical pickup peripherals such as a rail, etc.
Note:
Optical adjustment is not necessary after replacement of other parts inside traverse, however, may require when picture
deterioration is detected. Optical adjustment cannot be applied to the inside of optical pickup. When a traverse unit is replaced,
the adjustment is not necessary.
12.2.2. Necessity of Electrical Adjustment
· Follow the procedure for adjustment.

12.3. Storing and Handling Test Discs

· Surface precision is vital for DVD test discs. Be sure to store and handle them carefully.
1. Do not leave the discs uncovered on the work desk or other places after use.
2. Handle the discs carefully to prevent scratches. Put each disc in its case and place it in the standing position. Store the discs
in a cool place and avoid direct sunlight or air conditioner.
3. Accurate adjustment cannot be expected with a disc warped against a flat surface. Obtain a new test disc for optical adjustment.
4. If a warped disc is used, adjustment would result incorrectly, and other discs could not be used.

12.4. Optical Adjustment (Optical Pickup Tilt Adjustment)

Measurement point
None (LCD display of the player is used.)
12.4.1. Optical Adjustment (Optical Pickup Tilt Adjustment)
1. While the player is stopped and no disc is inserted, select the DVD function. Press and hold down the
and the number button, "5" on the remote controller unit.
2. Check that "J_xxx_yyy_zz" is appearing on the display.
For your information:
The values, "yyy" and "zz" are not associated to jitter value.
"yyy" indicates the frequency of error occurrence.
"zz" indicates the focus drive value.
Note:
Jitter value appears on the display.
Tools/Equipment
Adjustment point
Tangential adjustment screw
Tilt adjustment screw
Measuring equipment
Model/Product Number
DVDT-S20
Available on sales route. (T6) or RFKZ0185
VFK1784
RFKXPG641
RFKXGUD24
PVCD-K06 and any commercially available disc
PVCD-K06 and any commercially available disc
RFKZD03R005
Mode
T1 (inner track) play
T30 (central periphery) play
T43 (outer track) play
Adjustment value
Adjust that jitter value becomes minimum.
26
Disc
DVDT-S20
button on the player