Service Tools And Equipment; Important Points In Adjustment; Storing And Handling Test Discs; Optical Pickup Tilt Adjustment - Yamaha DVD-S830 Service Manual

I ADJUSTMENT

1. Service Tools and Equipment

Application
Tilt adjustment DVD test disc
Hex wrench
Inspection Extension cable 26P
(MODULE P.C.B. to TERMINAL P.C.B.)
Extension cable 22P
(MODULE P.C.B. to TERMINAL P.C.B.)
Others Screw lock
Grease 1
Grease 2
Oil
Confirmation CD test disc
VCD test disc
Recovery disc

2. Important Points in Adjustment

• Before starting optical pickup tilt adjustment, be sure to take anti-static measures.
• Optical pickup tilt adjustment is necessory after replacement of the following components.
1. Optical pickup unit
2. Spindle motor unit
3. Optical pickup peripheral parts (such as the rail)
Notes
Adjustment is generally unnecessary after replacing the other parts of the traverse unit. However, make adjustment if
there is a noticeable degradation in picture quality. Optical adjustments cannot be made inside the optical pickup.
Adjustment is generally unnecessary after replacing the traverse unit.

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 place discs directly onto the workbench, etc., after use.
2. Handle discs carefully in order to maintain their flatness. Place them into their case after use and store them vertically.
Store discs in a cool place where they are not exposed to direct sunlight or air from air conditioners.
3. Accurate adjustment will not be possible if the disc is warped when placed on a surface made of glass, etc. If this
happens, use a new test disc to make optical adjustments.
4. If adjustment is done using a warped disc, the adjustment will be incorrect and some discs will not be playable.

4. Optical Pickup Tilt Adjustment

Adjustment point
Mode
Disc
Measuring equipment
Adjustment value
Name
Tangential adjustment screw, Tilt adjustment screw
T01 (inner periphery) play, T43 (outer periphery) play
DVDT-S15 (AAX07320) or DVDT-S01
None (Use main unit servicing display.)
Adjust to the minimum jitter value.
Number
DVDT-S15 (AAX07320) or DVDT-S01
JZS0100 (TX946380)
JGS0098 (TX946370)
JGS0116 (AAX16610)
RZZ0L01 (TX946400)
RFKXGAK152 (AAX27800)
PFKXPG641 （ AAX46440）
RFKXGA1280 (AAX27790)
PVCD-K06 (TX946090) or any other
commercially available disc
PVCD-K06 (TX946090) or any other
commercially available disc
RFKZD5TR006 (AAX42050)
DVD-S830
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