The image of the PC card doesn't come out
The image of the PC card
doesn't come out.
No
Has the function to which the
signal is input by the input
switch been selected?
No Select the input of
specification by the input
switch.
Yes
Which signal is not output,
main or sub signal?
Yes
No
Is a signal output from
IC4702?
(pin 41), (pin 43), (pin 45)
Check around IC4702 and
check the communications
between IC4702 and the
microcomputer.
Main signal
No
Sub signal
Yes
No
Has the signal arrived at
IC4702?
(pin 78), (pin 80), (pin 82)
Check the communications
CN4003 and the microcomputer,
and check the communications
between CN4003 and IC4702.
Has the signal arrived at
IC6201?
(pin 43), (pin 48), (pin 54)
Check the communication
between IC6201 and
IC4702.
No
Yes
It is a specification that the
image on the subside is not
displayed.
Is the communication
between each IC on the MR
MAIN Assy and the
microcomputer normal?
Check around the
microcomputer and check
the IC that causes defective
communication.
Has the symptom been
settled when the MR MAIN
Assy is replaced?
The panel is defective.
Yes
No
Finishing troubleshooting
Yes
43