Sony DVP-CX777ES Service Manual page 36

DVP-CX777ES
4-10. IF CON SELF DIAGNOSTIC FUNCTION
1. PANEL-L BOARD (IF CON) TEST MODE
The PANEL-L board test mode is the IF CON self diagnostic mode.
The IF CON can diagnose the functions of the PANEL-L board
that the IF CON controls. Normally, the IF CON makes a serial
communication with the SYSTEM CONTROL and operates fol-
lowing he commands from the SYSTEM CONTROL, but in the
Test mode, the IF CON operates independently from the SYS-
TEM CONTROL.
Execute the Self Check Mode along the following flow.
START
I/F CON information
FL tube GRID and SEGMENT check
SIRCS reception check
KEY check
JOG and LED check
KEYBOARD check
CIS check
FINISH
Note: As for the CIS check, conduct the test by another method.
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2. OPERATION OF SELF CHECK MODE
The Self Check mode is the function to conduct the basic test to
the FL display and panel section.
2-1. How to enter the Self Check mode
The Self Check mode starts if either of the following conditions is
satisfied.
Condition 1:
With the SELF_CHECK (pin oj) of the IF CON (IC1003) on the
PANEL-L board kept "low", turn the power on. (Short the CL1001.)
Condition 2:
While pressing the
state, press the
commander and the mode transits to the Self Check mode.
When the Self Check mode started, "TEST START" is displayed
on the FL tube for 2 seconds and then the Self Check proceeds to
the IF CON information display.
2-2. How to release the Self Check mode
To release the Self Check mode, press the
remote commander during the Self Check mode.
(Note)
x key on the set when the set is in standby
[DISPLAY]
(RETURN) t
O
I/1
key on the remote
key on the set or