Aiwa NSX-VC220, Service Manual

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CD TEST MODE
1. How to Start the CD Test Mode
While pressing the FUNCTION button, insert the AC plug to the power outlet.
When the test mode is started, the message [CD TEST] is displayed.
2. How to Exit the CD Test Mode
Press the POWER button or disconnect the AC plug.
* When any key other than PLAY is pressed during play mode, the machine exits the test mode.
3. Function Descriptions and Application of the CD Test Mode
*1: The driver IC heats up and the protection circuit starts working when the focus search is continued for 10 minutes or longer. There can be a
case that operations can not be performed correctly.
In such a case, turn off the main power. After cooling down the machine, restart the machine.
*2: Be careful not to damage the gear because the sled motor rotates while the FF or RWD button is being pressed even if the pick-up is located
in the innermost track or the outermost track.
Mode
Start mode
Search
mode
Play mode
Traverse
mode
Sled mode
Spindle
mode
Operation
STOP button
Play button
PAUSE
button
FF button
RWD button
REC/REC
MUTE button
Display
All indicators light
READING
Normal
Normal
CD TEST
CD TEST
All indicators light
Function
• All FL indicators light
• LD illuminates all the time
• Focus search continuous
operations *1
• Spindle motor continuous kick
• Normal playback
• If TOC cannot be read, focus
search is continued
• Tracking servo OFF/ON
• Each time PAUSE button is
pressed, the tracking servo
repeats turning OFF/ON
• Pickup moves to the inner
circumference *2
At the same time, lens kicks to
the inner circumference
• Pickup moves to the outer
circumference *2
At the same time, lens kicks to
the outer circumference
• The spindle motor rotates
forward (rough speed) by
pressing the button and rotates
backward by pressing one more
time and stops by pressing again
Checking item
• FL check
• Microprocessor check
• APC circuit check
• Laser current measurement
• Focus search waveform check
• Focus error waveform check
(DRF in the search mode is
ignored)
• Each servo circuit is checked
• DRF check
• Tracking balance check
• Sled circuit check
• Tracking circuit check
• Mechanism operation check
• Pickup check
• Spindle circuit
• Spindle motor
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