VC-V50S
VC-V80T
VC-V91T
39
FLOW CHART NO.11 CAPSTAN MOTOR TROUBLESHOOTING
The capstan motor fails to run.
Is the capstan error signal given out
of pin(45) of IC801.
Check IC801.
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Is the voltage of 5V DC applied at
pin(8) of AE connector?
Check AT 5V line.
Is the voltage more than 2.6V DC
sent in pin(4) of AE connector?
Check line between the AE connector
and all the way up to pin(47)
of IC801.
Is the voltage of pin(3) of AE
connector 1.25~2.5V?
Check pin(35) of IC801 and all the
way up to the current limitter line
of R854~858.
Is the M 12V applied at pin(5) of
AE connector?
Check M 12V line.
Replace capstan motor.
FLOW CHART NO.12 DRUM MOTOR TROUBLESHOOTING(1)
The drum motor fails to run.
Is the drum error signal given out of
pin(44) of IC801?
Check IC801.
NO
NO
NO
YES
YES
YES
Check line between R836 (Drum
error filter) and all the way up to
pin(7) of AD connector.
Is the voltage more than about 1.3V
DC given out of pin(7) of AD
connector?
Is the M 12V applied at pin(4) of AD
connector?
Replace drum motor.
Check M 12V line.
FLOW CHART NO.13 DRUM MOTOR TROUBLESHOOTING(2)
The drum motor runs only for a few seconds.
Is drum PG signal given out from
pin(3) of AD connector?
Check drum motor.
Check line between AD connector
and all the way up to pin(13) of
IC801.
Is drum PG signal given out at
pin(13) of IC801?
Is drum FG signal given out at
pin(12) of IC801?
Check line between AD connector
and all the way up to pin(12)
of IC801.
Is head switching pulse given out at
pin(38) of IC801?
Check IC801.
Replace IC801.
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
D-FG
about 5Vp-p
YES
YES
YES
NO
NO
NO
FLOW CHART NO.14 HEAD SWITCHING PULSE TROUBLESHOOTING
No head switching pulse.
See
FLOW CHART NO.12,13
DRUM MOTOR
TROUBLESHOOTING(1), (2)
Is the drum motor rotating?
Is the drum PG signal and drum FG
signal present on the pins(13) and
(12) of IC801, respectively?
Are there drum PG M.M. signal at
pin(3) of IC801?
Check C835 and readjust R875.
(HEAD SW. POINT control.)
Check line between AD plug
and all the way up to IC801.
Check drum motor and between
AD to AO harness.
Are the drum PG signal and drum FG
signal present on pins(3) and (5) of
AD connector?
Replace IC801.
D-PG
about 5Vp-p
Содержание VC-V50S
Страница 46: ...VC V50S VC V80T VC V91T 8 BLOCK DIAGRAM SYSTEM SERVO BLOCK DIAGRAM 46 47 ...
Страница 48: ...VC V50S VC V80T VC V91T 50 POWER CIRCUIT BLOCK DIAGRAM ...
Страница 58: ...VC V50S VC V80T VC V91T 66 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 LED PWB VC V91T OPERATION PWB ...
Страница 73: ...Ref No Part No Description Code Ref No Part No Description Code VC V50S VC V80T VC V91T 81 ...