Pioneer CB-A802, Service Manual

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DVD-V8000
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7. GENERAL INFORMATION
7.1 DIAGNOSIS
7.1.1 SELF-DIAGNOSIS FUNCTION OF PICKUP DEFECTIVE
Character in bold : Item name
: Information display
Laser diode current value
Test mode screen
Symptom
• "No Disc" displays in LCD.
• Player does not playback, etc..
This unit can confirm the laser diode current value (DVD: 650 nm, CD: 780 nm) 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.)
Note :
When a DVD disc or a CD disc is played in the test mode, this function is effective.
Procedure of Self-Diagnosis
1
Enter the Test mode.
2
When diagnosing the 650 nm laser diode:
Press the
→
keys in order, and turn on the laser diode (It light-up for nine seconds.).
When diagnosing the 780 nm laser diode:
Press the
→
keys in order, and turn on the laser diode (It light-up for nine seconds.).
When let it turn on once again after performed
2
once,
After pressed REP.B key once
650 nm: Press the
→
keys in order
780 nm: Press the
→
keys in order
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
Replace the Traverse Mechanism Assy or Pickup.
TEST 1
TEST 1
TEST 4
TEST 4
It's effective in case of the following condition.