Self-Diagnosis Function Of Pickup Defective - Pioneer DV-79AVi Service Manual

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7.1.2 SELF-DIAGNOSIS FUNCTION OF PICKUP DEFECTIVE

This unit can confirm the laser diode current value (DVD: 650nm, CD: 780nm) of pickup on the Test Mode screen.
(Press the ESC → TEST keys in order on the test mode remote control unit (GGF1381) to enter the test mode.)
A
It's effective in case of the following condition.
Symptom
• Indicates "No Disc" in FL display.
• Player does not playback, etc..
Procedure of Self-Diagnosis
1 Enter the Test mode.
2 When diagnosing the 650nm laser diode:
→
Press the TEST
B
When diagnosing the 780nm laser diode:
→
Press the
TEST
When let it turn on once again after performed 2 once,
After pressed REP.B key once
650nm: Press the
TEST
780nm: Press the
TEST
3 Confirm the indicated value of the laser diode current (LDI). (Refer to following figure.)
4 When indicated value is more than 140, pickup is defective. → Replacement is necessary
C
Replace the Traverse Mechanism Assy or Pickup.
Note :
When a DVD disc or a CD disc is played in the test mode, this function is effective.
Laser diode current value
D
E
F
82
1
2
1 keys in order, and turn on the laser diode (It light-up for nine seconds.).
keys in order, and turn on the laser diode (It light-up for nine seconds.).
4
→
keys in order
1
→
keys in order
4
Character in bold : Item name
: Information display
2
3
DV-79AVi
3
4
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