VC-G20SM VC-G200SM VC-G201SM VC-G401SM - Cenatel

VC-G20SM/G200SM
VC-G201SM/G401SM
FLOW CHART NO.6 TIMER TROUBLESHOOTING (2)
Key-in input is not received
Does the key switch make good
contact, when the cassette tape is
inserted?
YES
Is there the function control voltage
inputted at the pins(88) and (89) of
IC701, when the keys are activated?
YES
Replace IC701.
NO
NO
Check switch contact.
Check peripheral circuit of pins(88) and
(89) of IC701, and the function keys.
SWITC FUNCTION SWITC FUNCTION TERMINAL
Ref No. Ref No. VOLTAGE
S805 SET S801 POWER 0.000V
S806 CH(+) S802 EJECT 0.652V
S807 PAUSE S803 MENU 1.864V
S808 REC S804 CH(-) 2.561V
S883 NO USE S881 PLAY
S884/S885 REW S882 STOP 3.081V
S886/S887 FF TP801 TEST 3.694V
- - TP802 CASSETTE 4.279V
- - - - 5.000V
KEY-1 IN KEY-0 IN
(Pin88 of IC701) (Pin89 of IC701)
FLOW CHART NO.7 INFRARED R/C TROUBLESHOOTING
No operation is possible from the infrared remote control.
Does the infrared remote control
function?
NO
Replace infrared remote control
as required.
YES
Is the supply voltage of 5V fed to NO
pin(2) of RMC801. Check AT 5V and GND lines.
YES
Is "L" pulse sent out from pin(1) of
the receiver when the infrared remote
control is activated?
NO
Replace receiver.
YES
Check between at pin(1) of receiver
and all the way up thru to pin(4) of
IC701.
NO
Replace IC701.
FLOW CHART NO.8 CASSETTE CONTROL TROUBLESHOOTING(1)
A cassette tape is not take in.
Is the cassette housing
distorted?
NO
Fix or replace the cassette
housing.
YES
Does the start sensor cover go
to open when the cassette tape
is inserted?
YES
Does pin(87) of IC701 change
from "H" to "L" level when the
cassette tape is inserted?
NO
NO
Check start sensor cover.
Check line between start sensor
and pin(87) of IC701.
YES
YES
Does pin(10) of P701 go to a
"H" level when the cassette tape
is inserted?
Does IC on mechanism output
about 10V when the cassette
tape in inserted?
YES
YES
NO
Is the specified voltage applied
at the loading motor terminal
when the cassette tape is inserted?
NO
Check IC on mechanism.
NO
Check line between pin(92) of
IC701 and pin(10) of P701.
YES
Is the supply voltage of 12V fed
to pin(8) of P701?
NO
Check M 12V lines.
Check line between IC on mechanism
and loading motor.
Replace loading motor.
A/D KEY INPUT
SPECIFICATION:-
40