2SC752 datasheet(10/54 Pages) TOSHIBA

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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.

SELF CHECK

NO. 23 * * * * * *

POWER

: 000

BUS LINE : OK

BUS CONT : OK

BLOCK : UV V1 V2

QV01 QV01S

SYNC

Part number of microprocessor (QA01)

Operation number of protection circuit (current limiter) . . . . “000” is normal.

BUS line check

“OK” ................... Normal

“SCL-GND” or “NG” .......... SCL-GND short circuit

“SDA-GND” or “NG” .......... SDA-GND short circuit

“SCL-SDA” or “NG” ........... SCL-SDA short circuit

BUS line ACK (acknowledge) check

“OK” ..................... Normal

Display of Location Number . . . . NG

(Display example)

“QA02 NG”, “H001 NG”, “Q501 NG” etc.

Note: The indication of failure place is only one place though failure places are plural. When

repair of a failure place finishes, the next failure place is indicated. (The order of priority of

indication is left side.)

Sync. signal check

Green display ..... Normal

Cyan display ...... No check

Red display ........ NG

UV ........... TV mode

V1 ........... VIDEO 1 mode

V2 ........... VIDEO 2 mode

* The items marked with

are not usable to display in the SELF DIAGNOSTIC FUNCTION for some model.

2SC752 Datasheet(PDF) 10 Page - Toshiba Semiconductor