Toshiba 19A20 Service Manual page 10

8. SELF DIAGNOSTIC FUNCTION (MTS Model)
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. 23XXXXXX
POWER : 000
BUS LINE : OK
BUS CONT : OK
BLOCK : UV V1 V2
or 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
Sync. signal check Green display ..... Normal
Cyan display ...... No check
Red display ........ NG
9. SELF DIAGNOSTIC FUNCTION (Monaural Model)
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.
NO. 23XXXXXX
SELF CHECK
POWER : 000
BUS : OK
NO ACK :
* The items marked with
repair of a failure place finishes, the next failure place is indicated. (The order of priority of
indication is left side.)
UV ........... TV mode
V1 ........... VIDEO 1 mode
V2 ........... VIDEO 2 mode
Part number of microprocessor (QA01)
Operation number of protecting circuit ----"000" is normal.
BUS line check ----"OK" is normal.
"[blank]" is normal.
are not usable to display in the SELF DIAGNOSTIC FUNCTION for some model.
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