JVC XV-1000BK, Руководство по обслуживанию

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Precautions for Service
Initialize the DVD player
If microprocessor (IC401, IC405 or IC601) or servo board (ENS-001) is replaced, initialize the
DVD player in the following manner:
1. Make sure that no disk is on the tray.
2. While pressing the ON SCREEN and DVD MENU keys simultaneously on the DVD player, turn on the
primary power.
3. Press the POWER key, then "TEST" is displayed on the FL.
4. Press the ENTER key to start initialization of EEPROM (takes approx. 3seconds).
5. Press the OPEN/CLOSE key, and the tray comes out.
This key is disabled during the initialization of EEPROM. When this key command is accepted to
open the tray, the initialization of EEPROM has already ended.
Handling of Traverse Unit and Laser Pickup
1. Do not touch any peripheral element of the pickup or the actuator.
2. The traverse unit and the pickup are precision devices and therefore must not be subjected to
strong shock.
3. Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the
internal power supply of the tester.)
4. To replace the traverse unit, pull out the metal short pin for protection from charging.
5. When replacing the pickup, after mounting a new pickup, remove the solder on the short land
which is provided at the center of the flexible wire to open the circuit.
6. Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the
characteristics of the optical block.
Do not change the setting of these half-fixed resistors for laser power adjustment.
Destruction of Traverse Unit and Laser Pickup by Static Electricity
Laser diodes are easily destroyed by static electricity charged on clothing
or the human body. Before repairing peripheral elements of the traverse
unit or pickup, be sure to take the following electrostatic protection:
1. Wear an antistatic wrist wrap.
2. With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick
up is to be repaired, ground the sheet or the plate.
3. After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by
the metal clip.
4. Short-circuit the laser diode by soldering the land
which is provided at the center of the flexible
wire for the pickup.
After completing the repair, remove the solder
to open the circuit.
Short-circuit