Test Mode - Aiwa CDC-X227 YZ Service Manual

TEST MODE

1. How to start CD Test Mode
1) Remove the resistor (100Kohms ) connected at Pin 63 (test) of IC701 (LC72358N)
on main circuit board. Then connect a wire between Pin 73 (VDD) and Pin
63 (test).
2) Connect ACC (red) and BACK UP (yellow) wires of the connector assy to
the positive terminal of Power Supply device and Ground (black) wire to the
negative terminal.
3) After adjusting the application voltage of Power Supply device to 14.5V,
turn on the power.
Test Mode starts, and all LCD are lit.
Refer to Fig-4
2. How to exit CD Test Mode
1) Switch off the power of Power Supply device.
2) Remove the wires of the connector assy.
3) Remove the wire on the main circuit board.
3. Function of CD Test Mode
MODE Function Key
Start Mode
Load/Unload
Search Mode
Play Mode
Traverse Mode
STOP
Sled Mode
Note 1: • Check Search Mode without inserting any CD.
• To exit Search Mode, insert a CD or press the POWER button to switch off the power.
• To protect driver IC, do not continue Search Mode more than 10 minutes.
Note 2: • To exit Play mode, press the POWER button to switch off the power.
Note 3: • To exit Traverse Mode, switch to Play Mode or press the POWER button to switch off the power.
Note 4: • Check Play Mode/Sled Mode movements after inserting a CD.
Display Movement
All lit.
All lit. CHACKING
All lit. Focus search continuous
movement.
PU lens repeats full swings.
(Note 1)
TOC READING Normal playback
Track No, If TOC READ is not available,
Play time display the same movement as focus
Level display search is applied. (Note 2)
Track No, Playback pause status (Note 3)
Play time display
All lit. Standby status
All lit. Pickup moves to the outermost
position.
Pickup moves to the innermost
position.
(Note 4)
– 45 –
Fig-3
Fig-4
Details
Test mode starts.
All SERVO OFF
LASER ON
VCC ON
APC circuit check
Laser current measurement
Focus error waveform check
Focus servo
Tracking servo
CLV servo
Sled servo
Tracking servo OFF
All servo OFF
Laser ON/OFF
Sled servo
Check mechanism movement.