Precautions For Service - JVC XV-S40BK Service Manual

XV-S40BK/XV-S42SL/XV-E100SL

Precautions for Service

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. 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. Pick-up's laser diode might be destroyed by static electricity, and put up solder to "Soldering part A",
please before extracting the card wire from connector (CN101).
4. Moreover, please remove solder from "Soldering part A" after inserting the card wire in connector (CN101)
at assembly.
Please refer to "Fig.4" of "Disassembly
method" for details.
1-4
Soldering part A
Servo control
board