Servicing Notes; Notes On Handling The Optical Pick-Up Block Or Base Unit; Notes On Laser Diode Emission Check; Notes On Chip Component Replacement - Sony ZS-M35 Service Manual

CAUTION
Use of controls or adjustments or performance of proce-
dures other than those specified herein may result in haz-
ardous radiation exposure.
1-1. NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

1-2. NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.

1-3. NOTES ON CHIP COMPONENT REPLACEMENT

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.

1-4. FLEXIBLE CIRCUIT BOARD REPAIRING

• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
SECTION 1

SERVICING NOTES

This Compact Disc player
is classified as a CLASS 1
LASER product.
The CLASS 1 LASER
PRODUCT label is located
on the bottom exterior.

1-5. CHUCK PLATE JIG ON REPAIRING

On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
• Code number of Chuck Plate Jig: X-4918-255-1

1-6. DEMONSTRATION

This set enters the demonstration mode about 10 seconds after the
power cord is connected. The demonstration displays such as
"DEMONSTRATION MODE" and "CREATE YOUR ORIGINAL
MD" then appears.
When no operation is entered for one minute after the [POWER]
button is turned on, the demonstration mode is also entered.
To release the demonstration mode, set the timer in this set or press
and hold down the [NO/CANCEL] button for about 2 seconds.
1-7. CHECKING THE LASER DIODE AND FOCUS
SEARCH OPERATION
1. Turn on the POWER and open the CD cover.
2. As shown below, push S402 (CD DOOR) with a screwdriver or
other tool.
3. Press the CD button.
4. Check the objective lens to make sure that the laser diode is
emitting light. If not so, the auto power control circuit or optical
pickup would be damaged.
Verify that the objective lens moves vertically three times for
focus search.
– 4 –
S402