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C) TROUBLESHOOTING
Step 1.
Checking Operations from Tape Insertion though Operation Start
Insert a tape cassette (DCC).
YES
NO
Cassette lid closure (SD11) detected?
YES
NO
"TAPE IN"(SMO3) detected?
YES
NO
Is the HOLD Sense switch set to OFF?
YES
NO
Rec Protect (SU04) detected?
YES
NO
DCC/ACC (SU02) detected?
YES
NO
Has PLAY, REW, FF, STOP
been pressed?
YES
Power on operation?
YES
Operation starts in the mode selected
in PLAY, REW, FF, STOP.
PCS 79 284
Execute Step 2, "Power Supply Circuit Test;
Wake-up Operation."
Execute Step 4, "Signal Line Waveformes Test."
Check the referring to (2) Button, SW ON/OFF
of FACTORY MODE. (See page 20.)
Check the QU01 pin 19 to 22, 36 to 38
and flexible cable WU01.
Execute Step 3, "Service Mode Test."
(See page 25.)
(See page 28.)
Step 2.
Power Supply Circuit Test; Wake-Up Operation
To
Motor
servo
L.P.F
BATT
To
Analog/
digital
To
LOVAC
oreo
2.7V Det
YES
Is voltage at output pin of QUO2
3.3V DC?
YES
Is voltage at output pin of QUO3
3.3V DC?
YES
Does pin ® of QU01 oscillate?
(f = 3 MHz)
QU02 is defective or F806 is defective.
QU03 is defective.
YES
3.2V DC?
Check each SW of PDO3 P.C. Board.
YES
|
QU01 is normal.
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