8. SELF DIAGNOSTIC FUNCTION
1) Press O9� button on Remote Control during display of adjustment menu in the service mode.
The diagnosis will begin to check if interface among ICOs are executed properly.
2) During diagnosis, the following displays are shown.
Indicated color of mode now selected : Green and Red
Indicated color of other modes: White
<SELF CHECK>
23******Green :Normal
TIME
Red : The microcomputer operates to provide judgement
POWER : 00
of no video signal. The red color is still indicated
BUS CONT : OK
though the signal is input, failure may exist in input
BLOCK : UV V1 V2 V3 V4
signal line including QV01.
V5
QV01 : In case of indication green ---Normal
In case of indication red with input signal----
GENERAL ADJUSTMENTSFailure may exist in output line including QV01.
NOTE: Component which controls character display on
Part number of microcomputer (QA01)
screen is ICF01 (TELETEXT IC.). If this display
Operation number of protecting circuit ----O00� is nor-
function fails to operate due to damage in ICF01,
mal.
self diagnosis procedure is as follows.
When indication is other than O00�, overcurrent apts to
(1) In case that power indicator is blinking with
flow, and circuit parts may possibly be damaged.
interval of 0.5 seconds; it means protecting
BUS CONT ----OOK� is normal.
circuit (Current limiter) is operating, and cir-
When indication shows OQ uuu NG�, the device with
cuit components may possibly be damaged.
the number may possibly be damaged.
Check related components.
BLOCK
(2) In case that power indicator is blinking with
UV : TV reception mode
interval of 1 second; Protecting circuit does
V1 : VIDEO 1 input mode (a1)
not operate, but a part of Bus line does not
V2 : VIDEO 2 input mode (a2)
SPECIFIC INFORMATIONSoperate normally. Check Bus line.
V3 : VIDEO 3 input mode (a3)
V4 : VIDEO 4 input mode (a4)
V5 : VIDEO 5 input mode (a5)
The items marked with are not usable to display in the SELF DIAGNOSTIC FUCTION for some model.
*
� 8 � |
ACEC
