Cd Test Mode - Aiwa cdc-x217 Service Manual

CD TEST MODE

1-1 Activating CD Test Mode
1) Remove the resistance (R757 100kΩ) of the 63 pin (test) for the IC701
(LC72358N-9A04) on the main circuit board, and connect the 73 pin (VDD)
and the 63 pin with a wire.
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 100kΩ).
1-3 Function and Usage of CD Test Mode
Mode Button for
Activation
Start Mode
Search RNDM (No 6)
Mode
Play Mode REP 1 (No 5)
Traverse INT (No 3)
Mode
Sled Mode
Gain Switch 1 (Preset button)
• 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.
• 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.
Display Operation
All lights are lit.
TOC Reading Focus search continuous operation.
PU lens repeats full-swings. (Note 1)
Track No. and Normal playback.
play time display Search-mode function if
Level/Indicator TOC READ is not available.
display
Track No. and Play pause status
play time display
All lights are lit.
All lights are lit. Step 1: Used for CD/CD-R
Step 2: Used for CD-R, RF
Step 3: Used for CD-R, Laser
– 34 –
Pickup moves to outermost
track.
Pickup moves to innermost
track.
Gain Up against Step 1
Power UP against Step 2
Add Wire
REMOVE 100kΩ
PIN63
PIN73
IC701
Contents
Test mode starts.
APC circuit check
Laser current measurement
Focus-error waveform check
Focus servo
Tracking servo
CLV servo
Sled servo
Tracking servo OFF
Sled servo
Mechanism function check
Steps 1 to 3 are cyclic.
If Disc is not compatible,
"ERROR 03" appears on the
display.