38
VC-AA350A/L/M/W
VC-AA352W,AA360A,AA370A
VC-AA550A/L/W,AA560A,AA570A
FLOW CHART NO.8 INFRARED R/C TROUBLESHOOTING
No operation is possible from the infrared remote control.
Does the infrared remote control
function?
Replace infrared remote control as
required.
Is the supply voltage of 5V fed to C805
of (+) side?
Check AT 5V and GND lines.
Is "L" pulse sent out from pin(1) of the
receiver when the infrared remote
control is activated?
Replace receiver.
Check between at pin(1) of receiver and
all the way up through to pin (4) of IC701.
Replace IC701.
YES
NO
YES
NO
NO
NO
YES
Is the cassette housing distorted?
Fix or replace the cassette housing.
NO
YES
YES
YES
YES
NO
YES
NO
NO
YES
NO
YES
FLOW CHART NO.9 CASSETTE CONTROL TROUBLESHOOTING(1)
A cassette tape is not taken in.
NO
NO
Check start sensor cover.
Check line between start sensor and
pin (87) of IC701
Check line between pin (92) of IC701
and pin(10) of P701.
Is the supply voltage of 12V fed to pin
(8) of P701?
Check M 12V lines.
Check IC on mechanism.
Check line between IC on mechanism
and loading motor.
Replace loading motor.
Is the specified voltage applied at the
loading motor terminal when the
cassette tape is inserted?
Does IC on mechanism output about 10V
when the cassette tape in inserted?
Does pin(10) of P701 go to a "H" level
when the cassette tape is inserted?
Does pin(87) of IC701 change from"H"
to "L" level when the cassette tape is
inserted?
Does the start sensor cover go to open
when the cassette tape is inserted?
NO
NO
NO
FLOW CHART NO.10 CASSETTE CONTROL TROUBLESHOOTING(2)
A cassette tape is taken in, but ejected at once.
Does the start sensor pulse at pin (87)
of IC701 change from "L" to "H" level
when the cassette tape is loaded?
Check line between start sensor and pin
(87) of IC701.
Does the end sensor pulse at pin (86)
of IC701 change from "L" to "H" level
when the cassette tape is loaded?
Check line between end sensor and pin
(86) of IC701.
Does the master cam mode shifter
operate normally when the cassette
tape is loaded?
Check line between cam switch and
IC701.
Replace IC701.
YES
YES
YES
FLOW CHART NO.11 LOADING MOTOR AND EJECT TROUBLESHOOTING
The cassette tape fails to come out.
Does the capstan motor start when the
EJECT button is pressed?
See FLOW CHART NO.12 CAPSTAN
MOTOR TROUBLESHOOTING
Does the take-up reel disk turn when the
capstan motor is running?
Check line between take-up reel
sensor and pin(2) of IC701.
Is a "H" level applied at pin(10) of P701
when a reel pulse has been inputted?
Check line between pin(72) of IC701
and pin(10) ofP701.
Is the supply voltage of 12V fed to
pin(8) of P701?
Is the voltage about 10V sent out from
IC on mechanism?
Check IC on mechanism.
Is the specified voltage applied at the
loading motor terminal?
Check line between IC on mechanism
and loading motor.
Does the loading motor run? Replace loading motor.
Replace cassette cam, gear, etc.
YES
YES
YES
Check M 12V lines.
NO
YES
NO
YES
YES
YES
NO
NO
NO
NO
NO
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