CD TEST MODE
1. Starting CD Test Mode
1) Remove the resistance (100K& ) on 63 pin (test) line of IC 901
(LC72358N) located on the main circuit board, and connectAdd Wire
73 pin (VDD) and 63 pin line with a wire.
REMOVE 100K &
PIN63
PIN73
IC901
Fig-1
2) Connect the ACC (red) /BATT (yellow) wire to the positive terminal of Power Supply device,
and the GND (black) wire to the negative terminal.
3) Adjust the applied voltage of Power Supply device to 14.5V, and
then turn on the power.
Test mode starts, and all LCD are lit.
Refer to Fig-2.
2. Exiting CD Test Mode
1) Turn off the power of Power Supply device.Fig-2
2) Remove connector Assy wires.
3) Remove the wire of the main circuit board.
3. Function of CD Test Mode
MODEFunction KeyDisplayMovementDetails
Start ModeAll lit.Test mode starts.
Load/UnloadAll lit.ChackingAll servo OFF
EJECTLaser ON
VCC ON
Search ModeAll lit.Continuous focus searchCheck APC circuit.
6 RNDMPU lens repeats full swings.Measure the level of
(Note 1)laser current electricity.
Check focus error wave forms.
Play ModeTOC ReadingNormal playbackFocus servo
5
Track No,If TOC READ is not available,Tracking servo
REP1Play time displaythe movement during searchCLV servo
Level displaymode is applied. (Note 2)Sled servo
Traverse ModeTrack No,Playback pause mode (Note 3)Tracking servo OFF
3
INTPlay time display
STOPAll lit.Standby modeAll servo OFF
4
Laser ON/OFF
Sled ModeAll lit.Pickup moves to theSled servo
outermost position.Check mechanism movement.
Pickup moves to the
innermost position.
(Note 4)
Note 1: Y Check Search Mode without inserting any CD.
Y To exit Search Mode, insert a CD or press the POWER button to turn off the power.
Y When Search Mode operates continuously more than 10 minutes, the protection circuit is activated due to heat generation of
the driver IC, and CD stops operating.
In this case, turn off the power, wait for approximately 10 minutes so that heat is released, and then restart.
Note 2: Y To exit Play mode, press the POWER button to turn off the power.
Note 3: Y To exit Traverse Mode, switch to Play Mode or press the POWER button to turn off the power.
Note 4: Y Be sure to insert a CD to check the movement of Play Mode and Sled Mode.
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ACEC
