Aiwa NSX-TR77, Service Manual

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CD TEST MODE -1/1
CD TEST MODE
1. Starting CD Test Mode
While pressing and holding down the CD FUNCTION button, insert the AC plug to outlet.
When test mode starts, the message, CD TEST appears on the display.
2. Exiting CD Test Mode
Press the POWER button or other FUNCTION button or remove the AC plug from outlet.
3. Function of CD Test Mode
No Mode Function Key Display Movement Check
1 Start Mode All lit. FL all lit. FL check
Microcomputer check
2 Search Mode STOP button READING LD constantly lit. APC circuit check
Focus search continuous Laser current electricity measurement
movement
∗
1, 2 Focus search waveform check
Spindle motor continuous kick Focus error waveform check
(DRF is ignored during search mode.)
3 Play Mode PLAY button Normal Normal playback Each servo circuit check
DRF check
DRF waveform check (approx. 1.5Vp-p)
If TOC READ is unavailable,
focus search is continued.
4 Traverse
Mode PAUSE
button Normal Tracking servo OFF/ON Tracking balance check
OFF and ON is repeated by every
press of the PAUSE button.
5 Sled Mode FF button CD TEST PU moves to the innermost position.
∗
3
At the same time, lens is kicked
Sled circuit check
toward inner position.
Tracking circuit check
RWD button CD TEST PU moves to the outermost position.
∗
3
Mechanism movement check
At the same time, lens is kicked toward
PU check
outer position.
6 Spindle Mode REC/
REC MUTE
button All lit. When the button is pressed at the first Spindle circuit check
time, spindle motor rotates forward Spindle motor check
(at rough speed).
At the second press, rotation is reversed.
At the third press, rotation stops.
∗
1 When Focus Search operates continuously more than 10 minutes, the protection circuit is activated due to heat generation of the
driver IC.
In this case, turn off the power, wait for approximately 10 minutes so that heat is released, and then restart.
∗
2 When the Forcus Search fails three times, the gain is switched for CD-RW at the fourth time.
∗
3 Be careful not to damage the gear because the sled motor rotates while the FF or RWD button is being pressed even if the pickup is
located in the innermost track or the outermost track.
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