Sharp MD-C2 Service Manual page 20

MD-C2
MD SECTION
When the combination of mechanism/pickup and PWB was changed , set the TEST mode to perform the AUTO preliminary
adjustment and AUTO adjustment, write the adjustment data in EEPROM.
When EEPROM was replaced, set the TEST mode,write the EEPROM set data (p25,p26) and then perform the preliminary
adjustment and AUTO adjustment, write adjustment data in EEPROM.
1. Preparation for adjustment
Test disc
Type
1 High reflection disc TGYS1 (SONY) [for Playback]
2 Low reflection disc Recording minidisc
3 Head Adjusting transparent
4 Low reflection disc Pre-adjustment disc
[TEAC Test MD]
Extension Cable (See Fig. 24-5)
Type
1 Extension Cable (7 Pin)
Execution item
required
basic setting
Repair
operations
PICK replacement
HEAD replacement
MECHANISM
replacement
MAIN PWB
assembly replacement
MD microcomputer
replacement
MD LSI replacement
RF IC replacement
EEPROM IC
replacement
number , , , ,
" – " is an item that you don't have to execute.
Test disc
Part No.
QCNWK0122AFZZ
TEMP Checking
EEPROM setting
TEMP EEPROM_SET
and indicate the order of inplementation.
The EEPROM writing result is shown at the end of the test mode
OK_EEPROM: "SET" and "YOBI COMPLETE" were written normally
WR_EEPROM: Although "SET" was written normally, it was not written
in the "YOBI COMPLETE" state.
Peform "AUTO-YOBI" adjustment.
After making a normal adjustment, write the preliminary
adjustment into the EEPROM.
NG_EEPROM: "SET" could not be written.
Check the connection between the MD microcomputer
Part No.
RRCDT0101AFZZ
––––––––––––
RRCDT0103AFZZ
88GMMD-318
AUTO-YOBI Writing the
adjustment EEPROM setting
AUTO–YOBI
– 20 –
Operation check
TEST-PLAY TEST-REC