Test Mode - Aiwa 6ZG-1 Service Manual

TEST MODE

1. How to Activate CD Test Mode
Insert the AC plug while pressing the CD function button.
When activating the test mode, "TEST" appears on the screen then all indicators light (start mode).
2. How to Cancel the CD Test Mode
Press the POWER button or disconnect the AC plug.
* When pressing any other function key during playback, the test mode is released.
3. Functions and Applications of CD Test Mode
Mode/No. Operation key
Start mode
No.1
Search mode STOP key
No.2
Play mode PLAY key
No.3
Traverse mode PAUSE key
No.4
Sled mode FF key
RWD key
No.5
Spindle mode TAPE
REC key
No.6
RF AGC mode TUNER key
No.7
*1 ..... There are cases when the focus search cannot be operated owing to the protection circuit being operated when heat builds up in the
driver IC if the focus search is operated continually for more than 10 minutes. In these cases turn off the power, wait for a while,
then re-start the machine.
*2 ..... To avoid damage to the gears, do not keep pressing the FF or RWD key when the pickup is at the outermost or innermost track,
because the sled motor keeps running while the FF or RWD key is pressed when the pick-up is at the outermost or innermost track.
Display
All lamps light • All FLs light
CD • Laser diode always turns ON
• Focus search continuos operation
• Spindle motor continuos kick
Normal • Normal playback
• Focus search is continued if TOC
cannot be read.
Normal • Tracking servo OFF/ON
Repeats OFF and ON every time the
PAUSE key is pressed.
CD TEST • Pickup moves to the innermost track *2
The lens is kicked to the innermost
track simultaneously.
CD TEST • Pickup moves to the outermost track *2
The lens is kicked to the outermost
track simultaneously.
All lamps light • The spindle motor is rotated forward
(rough speed) by pressing the key.
It is rotated reverse by pressing the key
again.
It is stopped by another pressing of the
button.
AGC ON/OFF • Repeats ON and OFF every time the
TUNER key is pressed.
• To return to the start mode display,
press the CD key three times.
Operation
• FL check
• Microprocessor check
• APC circuit check
*1 • Laser current measurement
• Focus search waveform check
• Focus error waveform check
• Each servo circuit check
• DPR check
• Tracking balance check
• Sled circuit check
• Tracking circuit check
• Mechanism operation check
• PU check
• Spindle circuit check
• Spindle motor check
• PC good or no good check
• RF AMP circuit check
19
Check contents
(DPR is ignored during search mode.)