8
CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent.
Details of the procedures are described in “5 Electrical Adjustments”.
• 5-6-2. Laser power check (see page 23)
• 5-6-3. Iop Compare (see page 23)
• 5-6-4. Auto Check (see page 24)
Note:
The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for
adjustments.
When performing adjustments, use the specified values for adjustments.
FORCED RESET
The system microprocessor can be reset in the following procedure.
Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.
Procedure :
Remove the short-pin attached to CN420, and then attach it again.
[MAIN BOARD] (Component Side)
CN420
Summary of Contents for MDS-JE440 - Md Player
Page 42: ...MDS JE440 42 42 6 10 SCHEMATIC DIAGRAM MAIN SECTION 3 3 See page 47 for IC Block Diagrams ...
Page 43: ...MDS JE440 43 43 6 11 PRINTED WIRING BOARD POWER SECTION ...
Page 44: ...MDS JE440 44 44 6 12 PRINTED WIRING BOARD DISPLAY SECTION ...
Page 45: ...MDS JE440 45 45 6 13 SCHEMATIC DIAGRAM DISPLAY SECTION See page 34 for Waveforms ...