JVC CA-MXS3BK Service Manual page 57

Front Section
Is the pin32 and 19 of
1C801 +5V and OV?
Does the voltage
shown below appear
at Pin35, 36,37, 66, 67
of FL801?
Check the connections
between the power
supply circuit and the
front PCB.
Does the reset pulse
appear at pin49 of
1C801?
Does part of LCD
become extremely
bright or display
abnormally?
Check the reset circuit.
YES
Do the signals shown
below come to the
pinS~13,17~30 and
38~64 of FL801?
Is the FL display normal?
Check IC801, switches
and wiring.
YES
2.5V Is operation of the
buttons normal?
YES
Defective IC801
Loading section
Are +12V and -12V
applied to the pint
and pin5 of IC704?
Are +12V and -12V
applied to the pin8
and pin4 of 1C705?
Check the power
supply circuit.
Is —5V output at pin 1
of P603 when
Opening the tray?
Is +6V output at pin
of P603 when closing
the tray?
Is the operation
Is pin 27 of IC801 5V
normal?
when opening the
2 e)
tray ?
Is pin26 of IC801 5V
when closing the
tray?
Check the loading
motor and the
connections between
the loading motor and
pin1 of P603.
Check IC801 ,
Spenccse switch and
the wiring from IC801
to the cd PCB.
Check 1€704, 705,
(Ne,
CA-MXS3BK
20373) 1-57