The laser diode in the traverse deck (optical pickup) may break
down due to potential difference caused by static electricity of
clothes or human body.
So, be careful of electrostatic breakdown during repair of the
traverse deck (optical pickup).
l
Handling of CD traverse deck (optical pickup)
1. Do not subject the traverse deck (optical pickup) to
static electricity as it is extremely sensitive to electrical
shock.
2. The short land between the No.4 (LD) and No.5 (GND)
pins on the flexible board (FFC) is shorted with a solder
build-up to prevent damage to the laser diode.
3. Take care not to apply excessive stress to the flexible
board (FFC board) (Fig 4.1).
4. Do not turn the variable resistor (laser power
adjustment). It has already been adjusted.
Fig 4.1
l
Grounding for electrostatic breakdown prevention
1. Human body grounding (Fig 4.2)
Use the anti-static wrist strap to discharge the static
electricity from your body.
2. Work table grounding (Fig 4.2)
Put a conductive material (sheet) or steel sheet on the
area where the traverse deck (optical pickup) is placed,
and ground the sheet.
Caution :
The static electricity of your clothes will not be grounded
through the wrist strap. So, take care not to let your
clothes touch the traverse deck (optical pickup).
Fig 4.2
Caution when Replacing the Optical Pickup :
The traverse has a short point shorted with solder to protect
the laser diode against electrostatics breakdown. Be sure to
remove the solder from the short point before making
connections.
4 Handling Precautions For Traverse Deck
8
SA-NS55E / SA-NS55EG
Summary of Contents for SA-NS55
Page 12: ...7 3 Disc Information 12 SA NS55E SA NS55EG ...
Page 19: ...9 3 Main Parts Location Diagram 19 SA NS55E SA NS55EG ...
Page 33: ...33 SA NS55E SA NS55EG ...
Page 37: ...10 2 Checking and Repairing of Panel P C B 37 SA NS55E SA NS55EG ...
Page 38: ...10 3 Checking and Repairing of Switch and Motor P C B 38 SA NS55E SA NS55EG ...
Page 39: ...10 4 Checking and Repairing Transformer P C B 39 SA NS55E SA NS55EG ...
Page 40: ...10 5 Checking and Repairing Power and AC Inlet P C B 40 SA NS55E SA NS55EG ...
Page 41: ...10 6 Checking and Repairing Main P C B 41 SA NS55E SA NS55EG ...
Page 42: ...10 7 Checking and Repairing CD Servo P C B 42 SA NS55E SA NS55EG ...
Page 50: ...SA NS55E SA NS55EG 50 ...
Page 54: ...SA NS55E SA NS55EG 54 ...
Page 56: ...56 SA NS55E SA NS55EG ...
Page 75: ...19 Exploded Views 19 1 Cabinet Parts Location Traverse Part Location SA NS55E SA NS55EG 75 ...
Page 76: ...SA NS55E SA NS55EG 76 ...
Page 77: ...19 2 Packaging SA NS55E SA NS55EG 77 ...
Page 78: ...SA NS55E SA NS55EG 78 ...
