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
<SELF CHECK>Indicated color of other modes: White
123******
Green :Normal
2POWER : 00
Red : The microcomputer operates to provide judgement
3BUS LINE : OK
of no video signal. The red color is still indicated
4BUS CONT : OK
though the signal is input, failure may exist in input
5BLOCK : UV V1 V2 V3
signal line including QV01.
QV01
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
1 Part number of microcomputer (QA01)
screen is ICF01 (QT01) (TELETEXT IC.). If this
2 Operation number of protecting circuit ----O00� is nor-
display function fails to operate due to damage in
mal.
ICF01 (QT01), self diagnosis procedure is as fol-
When indication is other than O00�, overcurrent apts to
lows.
flow, and circuit parts may possibly be damaged.
(1) In case that power indicator is blinking with
3 BUS LINE CHECK ----OOK� is normal.
interval of 0.5 seconds; it means protecting
OSDA1-GND� ------------- SDA-GND short circuit.
circuit (Current limiter) is operating, and cir-
OSCL1-GND� -------------- SCL-GND short circuit.
cuit components may possibly be damaged.
OSCL1-SDA1� ------------- SCL-SDA short circuit.
Check related components.
4 BUS CONT ----OOK� is normal.
(2) In case that power indicator is blinking with
When indication shows OQ uuu NG�, the device with
interval of 1 second; Protecting circuit does
the number may possibly be damaged.
SPECIFIC INFORMATIONSnot operate, but a part of Bus line does not
5BLOCK
operate normally. Check Bus line.
UV : TV reception mode
V1 : VIDEO 1 input mode (a1)
V2 : VIDEO 2 input mode (a2)
V3 : VIDEO 3 input mode (a3)
The items marked with are not usable to display in the SELF DIAGNOSTIC FUCTION for some model.
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� 8 � |
ACEC
TOSHIBA
