Sharp MD-M3 Service Manual page 18

MD-M3/M1
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 (p23,p24) and then perform the preliminary
adjustment and AUTO adjustment, write adjustment data in EEPROM.
1. Preparation for adjustment
Type
1 High reflection disc TGYS1 (SONY) [for Playback]
2 Low reflection disc Recording minidisc
SONY 80 minutes disk is recommended.(example:PRISM 80)
3 Head Adjusting transparent
4 Low reflection disc Pre-adjustment disc [TEAC Test MD]
Extension Cable (See Fig. 24)
Type
1 Extension PWB for servicing
2 Extension Connector (2 Pin)
3 Extension Connector (6 Pin)
4 Extension Cable (5 Pin)
5 Extension Cable (28 Pin)
Execution item
required
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
Test disc
Part No.
RUNTK0457AFZZ
QCNWK0059AFZZ
QCNWK0107AFZZ
QCNWK0109AFZZ
QCNWK0108AFZZ
TEMP Checking
EEPROM setting
basic 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
Although "SET" was written normally, it was not written
WR_EEPROM:
in the "YOBI COMPLETE" state.
NG_EEPROM: "SET" could not be written.
AUTO-YOBI Writing the
adjustment EEPROM setting
AUTO–YOBI
Peform "AUTO-YOBI" adjustment.
After making a normal adjustment, write the preliminary
adjustment into the EEPROM.
Check the connection between the MD microcomputer
and the EEPROM.
– 18 –
Part No.
RRCDT0101AFZZ
––––––––––––
RRCDT0103AFZZ
88GMMD-213A
Operation check
TEST-PLAY TEST-REC