M-900 >< X x Series
M-1200 X X XSeries
H.OSC Interna! type model (M-12021PB, M-12021NB, M-12041NB)
1--�-
----�
No character (Vid
:::::]
1
raster OK
'-------
1
Check signal level at connector
Pin #8
Normal
Check CRT Display
Check Base voltage level of 014
Yes
Check DC voltage level of
CRT Cathode.
Abnormal
Zero
Zerö or
low
No
Normal
Trouble in Video
Trouble in Video
Amp.
+B
line
-32-
Trouble in logic or contrast
control.
Check Contrast V R (V R 11)
Check DC voltage level of CRT Gl
Confirm the voltage when turn the
sub-bright VR (normal 3V
~
-30V)
No
Check Brightness circuit
VR
or
+40V
line
Содержание M-900 Series
Страница 9: ...0 026 2 6 6 5 8 M3 EXTRJOED fU E 0 M 900 X X X Series M 1200 X X X Series CX d CO ...
Страница 23: ...MODEL M 12021PB M 12021NB i i t L 1 L 1 i 22 i 1 SOii 011 E M 900 X X X Se ies M 1200 X X X Series ...
Страница 24: ...MODEL M 12041NB HI IOL IUII UUI ll t IOI uu1 auy 2 i i 23 H 1011 i 1 g _ w 111 i H 4 ...