Toshiba 3787DB - Self-Diagnostic Function

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.
Indicated color of mode now selected : Green and Red
<SELFE CHECK> Indicated color of other modes : White
2390**** Green : Normal
POWER : 00 Red: The microcomputer operates to provide judgement
BUS
LINE
:
OK
of
no
video
signal.
The
red
color
is
still
indicated
BUS CONT : OK though the signal is input, failure may exist in input
BLOCK : signal line including QVO1.
QV01 : In case of indication green ---Normal
In case of indication red with input signal----
Failure may exist in output line including QV01.
QOOOOO
2)
-
=
uu
=
-
2]
oe]
”
a)
f{
wl
ft
fc
ma
Pa
Lu
o
@ Part number of microcomputer (QA01)
@ Operation number of protecting circuit ----“O0” is nor-
mal.
When indication is other than “O00”, 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 OOO NG”, the device with
the number may possibly be damaged.
* The items marked with “" are not usable to display in the SELF DIAGNOST|C FUCTION for some model.