MD-MX30/MX30W
– 22 –
Test mode setting method
1. While holding down the MD PLAY and SURROUND buttons simultaneously, press the ON/STAND-BY button.
(State A is changed to state B .)
2. Insert the playback-only disc 1 (high reflection disc) or the recordable disc 2 (low reflection disc). (State is changed to C.) If "R/
P WHICH?" appears, the mechanism and the PWB can be mismatched. Check whether the combination of the playing/recording
PWB and mechanism are appropriate.
If "R/P WHICH?" still appears, eject the disc and check as follows.
Check 1: Check the pin 100 line of IC1401 for defective soldering. Check the pin 93 line of IC1401 for short-circuit and defective
soldering (Also check the SW PWB).
Check 2: Check the pin 3 line of IC1401 for defective soldering and short-circuit with other patterns. Check that the pickup laser
is not broken.
A tsm 1A
e
: TEST MODE
represents version of MD microcomputer.
STOP state
B EJECT
C AUT YOBI
2.
Test Mode
Entering the specific mode
Whenever the EQUALIZER button is pressed, the mode is changed.
Cancel of test mode
To restore the usual state once reset.
*Before pressing the MEMORY/ENTER 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 MEMORY/
ENTER button to write data in the EEPROM.
(Data is written in the EEPROM by pressing the MEMORY/ENTER 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
• TEMP setting (of EEPROM setting)
• CONTROL setting (of EEPROM setting)
• Setting of laser power (record/playback power)
2. AUTO pre-adjustment mode
• Automatic pre-adjustment is performed.
3. AUTO adjustment mode
• Automatic adjustment is performed. (After adjustment the grating adjustment mode is set.)
• RESULT sub-mode
• Remove do not set this mode since it is not necessary for the service.
• RESULT mode (final adjustment)
• MANUAL pre-adjustment mode
• MANUAL adjustment mode
• MANUAL FAB adjustment mode
4. EEPROM setting mode
• Various coefficients of digital servo are changed manually.
5. TEST-PLAY mode
• Continuous playback from the specified address is performed.
• C1 error rate measurement, ADIP error rate measurement.
6. TEST-REC mode
• Continuous recording from the specified address is performed.
7. INNER mode
• The position where the INNER switch is turned on is measured.
(When the MD STOP button is pressed in the C state, the indication A is
restored. To restore C again, press the EQUALIZER button.)
(AUTO adjustment) (AUTO adjustment) (FAB adjustment) (RESULT
Y O B I )
RESULT
A U T O Y O B I
AUTO AJST
R S T Y O B I
A U T F A B
EEPROM_SET
MAN FAB
(EEPROM setting) (MANUAL FAB adjustment) (MANUAL adjustment) (MANUAL adjustment)
M N U Y O B I
M N U A J S T
MD TEST
Playback power output
[ppw]
DC0.2V
DC1.5V
To check 2
NG
–
Microcomputer may have recognized the PWB
as for playback-only. Perform check 1.
Recording power output
[rpw]
Cannot enter
[rpw] mode
DC1.8V
Below DC1.5V
Check end
NG
–
NG
–
Perform check 2.
Microcomputer may have recognized the PWB
as for playback-only. Perform check 1.
Step
Mode
Check items
Pin 3 of IC1401
Result
Probable cause and remedy
1
2