Cd Test Mode - Aiwa Z-L520 Service Manual

CD TEST MODE

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1. How to Activate CD Test Mode
While pressing and holding the function button, insert the AC plug.
When the test mode starts, the message, "TEST" appears on the display.
2. How to Cancel CD Test Mode
Press the POWER button or remove the AC plug.
* The test mode is cancelled by other function keys during play.
3. Function and Usage of CD Test Mode
No Mode Button for
Activation
1 Start Mode
2 Search Mode STOP button
3 Play Mode PLAY button
4 Traverse PAUSE
Mode button
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5 Sled Mode FF button
RWD button
6 Spindle Mode REC button
*1 ... When focus search operates continuously more than 10 minutes, the protection circuit may start due to generation of heat in the
driver IC. If this happens, turn off the power, leave the unit for a while, and then, restart.
*2 ... Carefully monitor the gear against damage, as the sled motor rotates while the FF or RWD button is pressed even when the
pickup is located at innermost or outermost.
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Display Operation
All lights are All FL are lit.
lit.
Reading • Laser diode is lit during the
• Focus search continuous
• Spindle motor continuous kick.
Normal • Normal playback.
• Focus search continues if
Normal • Tracking Servo OFF/ON.
TEST • PU moves to inner track. *2
TEST • PU is moves to outer track. *2
All lights are • When the button is pressed,
lit.
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8
mode.
operation. *1
TOC READ cannot be read.
The OFF/ON operation repeats
each time the PAUSE button is
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pressed.
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At the same time, the lens is
kicked to inner track.
At the same time, the lens is
kicked to outer track.
the spindle motor operates in
forward rotation (rough speed).
Then, the button is pressed
again, it operates in reverse
rotation.
When the button is pressed
again, operation stops.
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Contents
• FL check
• Microcomputer check
• APC circuit check
• Laser current measurement
• Focus-search waveform check
• Focus-error waveform check
(DRF is ignored during search
mode)
• All servo circuits check
• DRF check
• Tracking balance check
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• Sled circuit check
• Tracking circuit check
• Mechanism operation check
• PU check
• Spindle circuit check
• Spindle motor check
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