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TEST MODE < CD >
QQ
1. How to Start the CD Test Mode
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While pressing the function CD button, insert the AC plug to
the wall outlet. The message "CD TEST" appears on the FL
tube and the test mode starts.
3. Function Descriptions on the CD Test Mode
After starting the test mode, press the desired button to check the following items.
Mode
Start mode
(Sled mode)
Search mode
Play mode
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Traverse mode
* Note 1: Be careful not to damage the gear because the sled motor rotates when the ∞ or § button is pressed even if the pick-up is
located in the innermost track or the outermost track.
The sled movement in the test mode is different from the normal operation. The sled moves to the outer track by pressing
the ∞ button and moves to the inner track by pressing the § button.
* Note 2: The driver IC (IC501) heats up so that the protection circuit starts working when the focus search is continued for 10
minutes or longer. There can be a case that the tracking servo cannot be locked-in under such circumstance.
In such a case, turn off the main power. After cooling down the machine for 10 minutes heat dissipation, restart the
machine.
4. Overview of Operation
The each mode can be operated one after another in the order that is shown by the arrow mark in the illustration from the "Start" mode.
Change the modes as shown.
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Operation
FL indication
Lights
∞
§
button
CD TEST
9 button
CD
2 button
CD1
Tr
; button
CD1
Tr
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Search mode
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2. How to Exit the CD Test Mode
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Exit the CD test mode by any of the following procedures.
• Press the function button (except the CD function button.)
• Press the main power switch.
• Disconnect the AC plug.
Function
• Initial status
• The pickup moves to the
outermost track
• The pickup moves to the
innermost track
(Normal operation as long as the
message CD is being played)
• Normal luminescence of laser
diode (CD block power ON)
• Continuos focus searching
(The pick-up lens repeats the
full-swing up and down
motions.)
• Spindle motor continuos kick
rotation.
• Normal playback
Q Q
3
6 7
1 3
1 5
• When the TOC reading is not
possible,
Focus search is continued
• Spindle motor kick rotation
continues.
• Turn off the tracking servo
Start mode
CD TEST
indication
co
Traverse mode
.
Play mode
67
9 4
2 8
Contents
• Sled servo
• Sled operation check
* Note 1
• APC circuit check
• Laser current measurement
Focus servo
* Note 2
• Focus search waveform check
• Focus error waveform check
(FOK/FZC does not monitor in
search mode)
• Focus servo/tracking servo
0 5
8
2 9
9 4
• CLV servo/Sled servo
• FOK (DRF) check
* Note 2
• Tracking servo OFF
• Tracking balance (radial balance)
check
m
9 9
2 8
9 9
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