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1. How to Activate CD Test Mode
2. How to Cancel CD Test Mode
Insert the AC plug while pressing the function CD button.
Either one of the following operations will cancel the CD test
All FL display tubes will light up, and the test mode will be
mode.
activated.
¢ Press the function button.
—* Press the power switch button.
(except CD function button) * Disconnect the AC plug
3. CD Test Mode Functions
When test mode is activated, the following mode functions from No.1 to No.5 can be used by pressing the operation keys.
FL display
Contents
Search mode
Laser diode turns always ON.
¢ APC circuit check
(CD block power is ON.)
¢ Laser current measurement
¢ Continual focus search
(Laser current control. Across a
(The pickup lens repeats the full-
resistor connected between emitter
swing up-down motion.)
and GND.)
* Avoid continual searches that last for | FOCUS SERVO
more than 10 minutes.
* Check focus search waveform
* Check focus error waveform
(FOK/FZC are not monitored in the
search mode)
FOCUS SERVO/TRACKING SERVO
CLV SERVO/SLED SERVO
Check FOK/FZC
TRACKING SERVO ON/OFF
Tracking balance (traverse) adjustment
No.2
* NOTE 1
Play mode
<P key
No.3
Traverse mode
| I key
Sled mode
KMkey
All lamps light
mi
*NOTE 2: Do not press the dor
keys when the machine is in the [Il status is active. If they are pressed, playback will not be possible
after the [status has been canceled. If the 4 or Wl keys are pressed in the [I status, press the Ml key and return to the start mode
(No.1).
*NOTE 3: When pressing the K¢ or )pI keys, take care to avoid damage to the gears. Because the sled motor is activated when the fi or fl
keys are pressed, even when the pick-up is at the outermost or innermost track.
Normal playback
¢ Focus search is continued if TOC
cannot be read.
* NOTE 1
During normal disc playback
Press once; tracking servo OFF
Press twice; tracking servo ON
* NOTE 2
Pickup moves to the outermost track'
* Pickup moves to the innermost track
* NOTE 3
(During playback, machine operates
normally.)
SLED SERVO
Check SLED mechanism operation
4.Operation Outline
The operation of each mode is carried out in the direction of the arrows from the start mode as indicated in the following illustration.
Play mode
Start mode
il)
(Ail FLs light up.)
)
=)
No. 4
Search mode
EI
UW)
18
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