Sony HCD-VZ50MD Service Manual page 11

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 "6 Electrical Adjustments".
• 6-6-2. Laser power check (see page 41)
• 6-6-3. Iop Compare (see page 41)
• 6-6-4. Auto Check (see page 42)
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 :
1. Disconnect the AC outlet.
2. Momentary short between BT900 pin 3 and BT900 pin # by lead wire.
3. Momentary short between C416 pin 3 and C416 pin # by lead wire.
[MAIN BOARD]
BT900
IC401
+
C416
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