Casio PZ-3100, Service Manual, Page: 4 / 33

CD ADJUSTMENT
Precautions
To prevent damage caused by static electricity, the following procedures for grounding is requir or repairing
the unit.
[Note] Remove the connection after installed.
1. Grounding for the human body
Be sure to put on a wrist-strap for grounding (with impedance lower than 10
6
Ω
) whose other end is
grounded. The strap works to drain away the static electricity build-up on the human body.
2. Grounding for the work table
Be sure to lay on the table a conductive sheet (with impedance lower than 10 6
Ω
) such as a sheet of
copper which is grounded.
3. As static electricity build-up on clothes is not drainded away, be careful not to let your clothes touch the
unit.
4. The short-pad on the pick-up PCB of a spare part is short-circuited for protection during shipment. To
open the short circuit, remove the soldering quickly with a soldering iron whose insulation resistance is
larger than 10M
Ω
after connection to a suitable APC circuit.
Equipment Required
*
Multi Meter
*
Oscilloscope
*
Compact Disc
*
Dummy Load 10 k
Ω
Pickup
Shorting tab
Desolder here
Pickup
1. Wrist-Strap
for grounding
1M
Ω
1M
Ω
2. Conductive Sheet
2