AIWA ADC-M65 YU Service Manual download (Page 5 of 6)

Manual type:Service Manual
Pages:6
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Page 5 of 6
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There are two methods to perform operation check using test mode.
One method uses the head unit.
The other method uses the repair jig.
Because different operation buttons must be used for entering the operation modes and there are cases that the set does not run at all
in the
method that uses the head unit, the method using the repair jig is described as follows.
2-1.
How to start up the CD test mode
Connect the P.W.B KEY in accordance to “SERVICE JIG AND TOOLS” step (6) How to use the repair jig - When the Control
Unit (CDC/CT) is not used.
1)
While pressing the STOP button of the P.W.B KEY, turn on the +12 V power of ACC/BACK UP.
2-2.
How to exit the CD test mode
1)
Turn off the +12 V power of ACC/BACK UP.
2-3.
Function description of CD test mode
Uses of the respective buttons of the P.W.B KEY are
described in Fig-1.
Mode
Servo OFF
Search mode
Play mode
Sled mode
CD change
Operation key
STOP
FOCUS
FOCUS
V
SV ON
FWD
RVS
DISC UP
Operation
All servos off
Continuous focus search
Pickup lens repeats full swing (Note 1)
Normal playback
Pickup moves to outer circumference
Pickup moves to inner circumference
Disc unload
V
Magazine change
V
Disc load
Contents
APC circuit check
Laser current measurement
Focus error waveform check
Focus servo
Tracking servo
CLV servo
Sled servo
Sled servo
Mechanism operation check
Mechanism operation check (cyclic)
*
During the PLAY mode, the REV, FWD and DISC UP keys are invalid.
Press the STOP key once.
*
When a Head Unit is connected, the Disc No. and the Track No. are shown on display in the same way as in the normal
operation.
Note 1:
If the focus search operation is continued for 10 minutes or longer, the driver IC heats up sufficiently to trigger the
protection circuit, which stops the CD system.
Turn off the main power and re-start operation about 10 minutes later.
Fig-1
TEST
MODE
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