User Guide

DVM-4800

2.2 Cautions to Be Used Before Replacing the Optical Pickup Unit

and Spindle Motor Assembly

Before replacing the optical pickup unit and spindle motor assembly, check the total using hours for each of them.

The checking method is as follow:

Operating state & Key operation Display

Using hours of CD laser Press "PAUSE, FWD-SKIP" and "5" on the T1_xxxx_yyyy: total hours are

remote control in this order while the unit displayed by 4-digit figures (unit: 10 hours).

is stopped yyyy: CD laser Time

Using hours of DVD laser Press "PAUSE, FWD-SKIP" and "5" on the T1_xxxx_yyyy: total hours are

remote control in this order while the unit displayed by 4-digit figures (unit: 10 hours).

is stopped xxxx: DVD laser Time

Using hours of SP motor Press "PAUSE, FWD-SKIP" and "6" on the T2_xxxx: total hours are

remote control in this order while the unit displayed by 4-digit figures

is stopped (unit: 10 hours).

Resetting using hours While displaying Timer 1 data, press STOP T1_0000_0000

of CD and DVD lasers and FWD-SKIP buttons on the player, and

(Simultaneous resetting) "5" button on the remote control unit

Resetting using hours While displaying Timer 2 data, press STOP T2_0000

of the motor and FWD-SKIP buttons on the player, and

"6" button on the remote control unit

Cautions to be taken when replacing the optical pickup

The optical pickup may break down due to the static electricity of human body. Take proper protection measures against static

electricity before repairing the parts around the optical pickup. (See the page describing the PREVENTION OF STATIC

ELECTRICITY DISCHARGE.)

1. Do not touch the areas around the laser diode and actuator.

2. Do not judge the laser diode with a tester. (The tester will be damaged easily.)

3. It is recommended to use a destaticized soldering iron for short-circuiting or removing the laser diode.

(Recommended soldering iron) HAKKO ESD Product.

4. Solder the land of the flexible cable in the optical pickup.

Note:

• When using a soldering iron which is not destaticized, short-circuit the terminal face of the flexible case with a clip.

After that, short-circuit the land.

• After the repairing work is completed, remove the solder according to the correct procedure shown in this Technical

Guide.

Optical pickup unit

Flexible cable

Ground with a clip.