CD TEST MODE
1-1 Activating CD Test Mode
1) Remove the resistance (R757 100k& ) of the 63 pin (test) for the IC701Add Wire
(LC72358N-9A04) on the main circuit board, and connect the 73 pin (VDD)
and the 63 pin with a wire.
REMOVE 100k&
PIN63
PIN73
IC701
2) Supply DC +12V to the ACC (red) and BACKUP (yellow) of the power
supply/speaker connector, and supply DC12V to the Ground (black)
wire.
When the CD test mode is activated, all the lights are lit on the display as shown in the diagram below.
1-2 Exiting CD Test Mode
1) Remove the wires of the 63 pin (test) and the 73 pin (VDD) for IC701 (LC72358N-9A04) on the main circuit board, and connect
the resistance (R757 100k& ).
1-3 Function and Usage of CD Test Mode
ModeButton forDisplayOperationContents
Activation
Start ModeAll lights are lit.Test mode starts.
Search RNDM (No 6) T OC Reading Focus search continuous operation. APC circuit check
ModePU lens repeats full-swings. (Note 1)Laser current measurement
Focus-error waveform check
Play Mode REP 1 (No 5) Track No. and Normal playback. Focus servo
play time displaySearch-mode function ifTracking servo
Level/IndicatorTOC READ is not available.CLV servo
displaySled servo
TraverseINT (No 3)Track No. andPlay pause statusTracking servo OFF
Modeplay time display
Sled ModeAll lights are lit.Pickup moves to outermostSled servo
track.Mechanism function check
Pickup moves to innermost
track.
Gain Switch1 (Preset button)All lights are lit.Step 1: Used for CD/CD-RSteps 1 to 3 are cyclic.
Step 2: Used for CD-R, RFIf Disc is not compatible,
Gain Up against Step 1 OERROR 03 � appears on the
Step 3: Used for CD-R, Laserdisplay.
Power UP against Step 2
Y During search-mode check, do not insert a disc.
To exit the search mode, press the PWR button. When the PWR button is pressed again, the Test Mode restarts.
Y Be sure to insert a test disc when the search mode is not activated.
Note 1: When focus search operates continuously more than 10 minutes, the protection circuit may start due to
generation of heat in the driver IC. If this happens, turn off the power, leave the unit for a while, and then, restart.
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ACEC
