Toshiba 21J1T Service-Handbuch - Seite 8

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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.

2 3 * * * * * *

POWER

: 00

BUS LINE

: OK

BUS CONT : OK

BLOCK

: UV V1

Part number of microprocessor(Q100)

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

the number may possibly be damaged.

BLOCK

UV : TV reception mode

V1 : VIDEO input mode (

NG", the device with

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 Q100.

- 8 -

: White