Aiwa AZG-1 Service Manual
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1. How to Start the CD Test Mode
While pressing the CD function key, connect the AC power plug to wall outlet.
The test mode starts up and “CD TEST” appears on the display.
2. How to Exit the CD Test Mode
Press the POWER button or disconnect the AC power plug from wall outlet.
* When any function key other than PLAY is pressed during playback, the test mode is canceled.
3. Function and Use of the CD Test Mode
TEST MODE
NO
1
2
3
4
5
6
7
MODE
Start mode
Search mode
Play mode
Traverse mode
Sled mode
Spindle mode
RF AGC mode
How to enter the
mode
STOP button
PLAY button
PAUSE button
FF button
RWD button
TAPE REC
button
TUNER button
Display
All indicators turn
on
CD
Normal
Normal
CD TEST
CD TEST
All indicators turn
on
AGC ON/OFF
Operation
• All FL all ndicators turn on
• LD turns on all the time
• Focus search continuos
operation *1
• Spindle motor continuos
kick
• Normal playback
• Focus search is continued if
failed in TOC READ.
• Tracking servo OFF/ON
Repeats OFF/ON every time
the PAUSE button is
pressed
• Moves PU to inner
circumference *2
Kicks the lens to inner
circumference at the same
time
• Moves PU to outer
circumference *2
Kicks the lens to outer
circumference at the same
time
• Pressing the button once
rotates the spindle motor in
the normal direction (rough
speed). Pressing the button
again rotates it in the reverse
direction. Pressing it again
stops the motor
• Repeats ON/OFF every time
the TUNER button is
pressed
Check item
• FL check
• Microprocessor check
• APC circuit check
• Laser current measurement
• Focus search waveform
check
• Focus error waveform check
(Ignores DRF during search
mode)
• Each servo circuit is checked
• DRF check
• Tracking balance check
• Sled circuit check
• Tracking circuit check
• Mechanism operation check
• PU check
• Spindle circuit check
• Spindle motor check
• PU good or defective check
• RF AMP circuit check
*1 ...... When the focus search keeps running for 10 minutes or longer continuously, the driver IC heats up, and the protective circuit works
so that the machine may stops operating.
In this case, turn off the main power, wait for a while and restart the machine.
*2 ...... Do not keep pressing the FF or RWD button while the pickup is located at the innermost or outermost circumference because the
gear can be damaged as the sled motor keeps rotating.
4. Automatic Adjustment Result Display
The automatic adjustment values of the focus and the tracking can be displayed.
4-1. Automatic Adjustment Result Display of Focus Offset Cancel/Gain
1) Enter the start mode (all indicators turn on).
2) Press the TAPE button to display “F**” and set each of the adjustment item to either ON or OFF. (Refer to the following
table.)
3) Press the PLAY button to play back the CD.
4) Press the CD button.
5) The automatic adjustment value “F** **” is displayed. (Refer to the following table.)
6) Upon completion of check, press the CD button twice to return to the play mode.
4-2. Automatic Adjustment Result Display of Tracking Offset Cancel/Balance/Gain
1) Enter the start mode (all indicators turn on).
2) Press the AUX button to display “T***” and set each adjustment item to either ON or OFF. (Refer to the following table.)
3) Press the PLAY button to play back the CD.
4) Press the CD button twice.
5) The automatic adjustment value “F******” is displayed. (Refer to the following table.)
6) Upon completion of check, press the CD button to return to the play mode.
Adjustment item (ON = 1, OFF = 0)
Automatic adjustment value display
(Asterisk * means hexadecimal display.)
F OFFSET GAIN F OFFSET — GAIN
F 0 0 F Not displayed Not displayed Not displayed
F 1 1 F ** Not displayed **
F 1 0 F ** Not displayed Not displayed
F 0 1 F Not displayed Not displayed **
Adjustment item (ON = 1, OFF = 0)
Automatic adjustment value display
(Asterisk * means hexadecimal display.)
T OFFSET BALANCE GAIN T OFFSET BALANCE GAIN
T 0 0 0 T Not displayed Not displayed Not displayed
T1 1 1T** ** **
T 1 1 0 T ** ** Not displayed
T 1 0 1 T ** Not displayed **
T 1 0 0 T ** Not displayed Not displayed
T 0 1 1 T Not displayed ** **
T 0 1 0 T Not displayed ** Not displayed
T 0 0 1 T Not displayed Not displayed **