Toshiba 15SZ2E Service Manual page 8

8. SELF DIAGNOSTIC FUNCTION
1) Press "9" button on Remote Control during display of adjustment menu in the service mode.
The diagnosis will begin to check if interface among IC's are executed properly.
2) During diagnosis, the following displays are shown.
<SELF CHECK>
23******
POWER : 00
BUS LINE : OK
BUS CONT : OK
BLOCK : UV V1
Part number of microprocessor(QA01)
Operation number of protecting circuit ----"00" is nor-
mal.
When indication is other than "00", overcurrent apts to
flow, and circuit parts may possibly be damaged.
BUS LINE CHECK ----"OK" is normal.
"SDA1-GND" ------------- SDA-GND short circuit.
"SCL1-GND" -------------- SCL-GND short circuit.
"SCL1-SDA1" ------------- SCL-SDA short circuit.
BUS CONT ----"OK" is normal.
When indication shows "Q uuu NG", the device with
the number may possibly be damaged.
BLOCK
UV : TV reception mode
V1 : VIDEO input mode (a1)
The items marked with
*
QT01
are not usable to display in the SELF DIAGNOSTIC FUNCTION for some model.
Indicated color of mode now selected : Green and Red
Indicated color of other modes
Green : Normal
Red : The microprocessor operates to provide judgement
of no video signal. The red color is still indicated
though the signal is input, failure may exist in input
signal line including QT01.
QT01 : In case of indication green ---Normal
In case of indication red with input signal----
Failure may exist in output line including QV01.
NOTE: Component which controls character display on
screen is QT01. If this display function fails to op-
erate due to damage in QT01, self diagnosis pro-
cedure is as follows.
(1) In case that power indicator is blinking with
interval of 0.5 seconds; it means protecting cir-
cuit (Current limiter) is operating, and circuit
components may possibly be damaged. Check
related components.
(2) In case that power indicator is blinking with
interval of 1 second; Protecting circuit does
not operate, but a part of Bus line does not
operate normally. Check Bus line.
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: White