Cd Test Mode - Sony Aiwa CX-JN20 Service Manual

CX-JN20/JN30

CD TEST MODE

• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.
Procedure:
1. In the status where AC plug is disconnected, while pressing
[CD]
the button, connect the AC plug to turn the power on.
2. When enter this mode, it displays "CD TEST" and few sec-
onds later, all segments turn on of the fluorescent indicator
tube.
3. To release from this mode, disconnect the AC plug and turn
the power off.
In this mode, it operates as following table.
Button
M
Move the pick-up to outside track
m Move the pick-up to inside track
N Playback a CD
If it cannot focus on, it continuous focus search
x
When playback a CD: stop playback
When stop a CD:
display "READING" (blink)
continuous laser diode on
continuous focus search (not made focus on)
X Pause, Tracking servo off
(ignore CLV error)
18
Operation Purpose of use
Sled circuit check
Tracking circuit check
Mechanism operation check
Optical pick-up check
Servo block check
APC circuit check
Laser current measure
Focus search waveform check
Tracking balance check