Sharp MD-C2 Service Manual page 21

2. Test mode
Test mode setting method
1. Holding down the MD1 PLAY button and FF(
(State A is changed to state B .)
2. Load playback disc 1 (high reflection disc) or recording disc 2 (low reflection disc) into DISC 3, and press MD RELEASE.
(State C is set.)
Thus, the test mode state is set.
A tsm 16 e
STOP state
B EJECT
C AUT YOBI
Entering the specific mode
Whenever the SURROUND button is pressed, the mode is changed.
AUTO pre-adjustment
ERR DATA EEPROM setting
Cancel of TEST mode
To restore the usual state once reset.
*Before pressing the POWER button, be sure to perform the AUTO preliminary adjustment and the AUTO adjustment. Make
sure that they return a "COMPLETE" result.
*When the data of EEPROM was changed or the preliminary adjustment was performed again, be sure to press the POWER
button to write data in the EEPROM.
(Data is written in the EEPROM by pressing the POWER button.)
*When changing the EEPROM settings, write them into the EEPROM and then enter the test mode again. Perform the AUTO
preliminary adjustment and the AUTO adjustment. Then, write those into the EEPROM.
• Test Mode
1. EJECT mode
2. AUTO pre-adjustment mode
3. AUTO adjustment mode
• FAB adjustment mode
• RESULT sub-mode
• RESULT mode (final adjustment)
• MANUAL pre-adjustment mode
• MANUAL adjustment mode
• EER DATA mode
4. EEPROM setting mode
5. TEST-PLAY mode
6. TEST-REC mode
7. INNER mode
)button, press POWER button switch.
: TEST MODE represents version of MD microcomputer.
(When the MD2 PLAY button is ressed in the C state, the indication A
is restored. To restore C again, press the SURROUND button.)
AUTO adjustment
MANUAL adjustment
• TEMP setting (of EEPROM setting)
• CONTROL setting (of EEPROM setting)
• Setting of laser power (record/playback power)
• Automatic pre-adjustment is performed.
• Automatic adjustment is performed. (After adjustment the grating adjustment mode is set.)
• Therefore do not set this mode since it is not necessary for the service.
• Various coefficients of digital servo are changed manually.
• Continuous playback from the specified address is performed.
• C1 error rate measurement, ADIP error rate measurement.
• Continuous recording from the specified address is performed.
• The position where the INNER switch is turned on is measured.
FAB adjustment RESULT Pre-adjustment
MANUAL pre-adjustment
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MD-C2
RESULT