Toshiba 27A50, Service Manual

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GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
SELF CHECK
NO. 23XXXXXX
POWER : 000
BUS LINE : OK
BUS CONT : OK
BLOCK : UV V1 V2
or U OUT1 VOUT2
SYNC QV01 QV01S
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.
1
2
3
4
5
1
Part number of microprocessor (QA01)
2
Operation number of protection circuit (current limiter) . . . . “000” is normal.
3
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
4
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.)
5
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.