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— 5 —

1)

A red laser diode for DVD requires more attention to static
electricity than general infrared laser diodes for CD.
Because its durability to static electricity is far weaker than
that of infrared laser diodes, always use an earth band when
handling the optical pick-up block as service parts.

2)

As for the flexible board KHS-180A (RP) packed as service
parts, the short lands have been soldered to protect from static
electricity. Accordingly, remove solders when replacing optical
pick-up. (See Fig. 4)

Fig. 4  Flexible board

3)

In handling the KHS-180A (RP), do not touch inhibited parts
shown in Fig. 5, but grip the slide base bearing and U-shaped
guide.

Touch inhibited parts
• Objective lens
• Skew sensor
• Laser holder
• Laser coupler
• Flexible board
• OEIC
• Lens actuator covers

Fig. 5  KHS-180A (RP)

DVD short land

CD short land

Slide base bearing

Skew sensor

Lens actuator 
covers

Objective lenses

U-shaped guide

OEIC

Laser holder

Flexible board

Connector

Laser coupler

— 6 —

1)

Grease must be applied if the following parts were replaced. (See Fig. 6)

Recommended grease is Foil KG-70MP.

In applying grease, take care not to allow grease to stick to other parts (particularly, rubber belt, spindle motor, and optical pick-up)

Fig. 6

Base unit holder
2 bosses

Loading pulley shaft
NOTE:Add grease if tray
           generates noise
           periodically.

Tray 3 grooves
NOTE:Add grease if tray
           moves slowly.

Slide base

Skew cam

Cam gear

— 7 —

1)

Remove the tray. (Refer to 2-6)

2)

Clean the spindle motor turntable if disc antiskid rubber (black)
is dirty. (See Fig.7)

Fig. 7

1)

Align triangle marks when assembling the cam gear and drive
gear. (See Fig. 8)

Fig. 8

Spindle motor
Turntable

Drive gear

Cam gear

Align triangle marks.

1)

Assemble the spindle base into the base unit.

2)

Lock with 4 shoulder screws. (See Fig. 9)

3)

Check if 4 insulators deformed. (See Fig. 9)

Fig. 9

1)

The optical pick-up could be destroyed unless the OPT harness
is connected normally to the connector. (See Fig. 10)

Fig. 10

NG

Four step screws

Two insulators

Two insulators

Insulator

Good

Good

NG

OPT harness

Connector

— 8 —

1)

Align two bosses. (See Fig.11)

2)

Fix the board securely with screws (PTPWH 2 

×

 5).  (The sensor

will not function normally if the board floats up.)

Fig. 11

1)

Align two bosses. (See Fig.12)

2)

Align four tabs. (See Fig.12)

3)

Fix the board securely with 3 screws (BV 3 

×

 10). (The sensor

will not function normally if the board floats up.)

Fig.12

Screw
(PTPWH2 

× 

5)

FG-43 board

Two bosses

Three screws
(BV3 

× 10

)

TK-47 board

Boss

Two claws

Boss

Two claws