11
PRECAUTIONS WHEN CHANGING LASER PICK-UP
When removing the pick-up assembly, short circuit the PCB tracks on the optical block as show in the drawing in
order to protect the pick-up before removal.
NOTE
: Replacement pick-up assemblies are supplied with the PCB pattern already protected.
DO NOT REMOVE THE SHORT CIRCUITS UNTIL YOU HAVE FINISHED FITTING THE PICK-UP.
Caution:
Laser diodes are extremely susceptible to damage from static electricity. Even if a static discharge does not ruin the
diode, it can shorten its life or cause it to work improperly. When replacing the pick-up, use a conductive mat, a
grounded soldering iron, and so on, to protect the laser diode from static damage.
Ground Conductive
Wrist Band for Body
Ground Line
Less than
10 ohm
Conductive Gum Mat
Soldering
Iron with
Ground
wire
Protective soldering place
for laser diode
Summary of Contents for C521i
Page 1: ...NAD C 521i COMPACT DISC PLAYER C 521iCOMPACT DISC PLAYER SERVICE MANUAL...
Page 12: ...12 PCB LAYOUT DISPLAY BOARD KEY BOARD LIVE BOARD LED BOARD...
Page 13: ...14 13 MAIN BOARD...
Page 30: ...34 EXPLODED VIEW...
Page 33: ...SERVICE MANUAL NAD 2002 C 521i COMPACT DISC PLAYER NAD ELECTRONICS INTERNATIONAL TORONTO...
