21HM-10F
36
TROUBLESHOOTING TABLES.
NEITHER VERTICAL NOR
HORIZONTAL SYNCHRONIZATION
CIRCUIT TO BE CHECKED:
Sync. Separator Circuit.
Check pin33 and 34
of IC801.
DEFECTIVE VERTICEL AMP.
AND VERTICAL LINEARITY
Readjusted vertical size.
(Bass Data)
Vertical linearity and size
is abnormal.
Check R502,R505
NO VERTICAL SCAN
Check IC501 bias.
Normal
Abnormal
Check C502 and C514.
Check IC501.
NO SPECIFIC COLOUR
NO
YES
Is some colour produced in
B/W broadcast reception?
Check IC801,R801,R802,
YES
Is the white balance
R803,D804,D805,D806
properly adjusted?
and Q801.
NO
Readjusted the white
balance.
The picture colour is cyan.
The picture colour is magenta.
The picture colour is yellow.
Check Q870,Q885 and
Check Q871,Q883 and
Check Q872,Q887 and
their adjacent circuits.
their adjacent circuits.
their adjacent circuits.
Summary of Contents for 21HM-10F
Page 19: ...21HM 10F 26 ...
Page 28: ...21HM 10F SCHEMATIC DIAGRAM OF CRT F7341N0 00 Version GA 1E CHASSIS MODEL 21HM 10F ...
Page 29: ...21HM 10F Page 29 SCHEMATIC DIAGRAM OF MOTHER UNIT F7340N4 00 Version ...
Page 30: ...SCHEMATIC DIAGRAM OF MOTHER UNIT F7340N4 00 Version Page 30 Page 28 ...
Page 31: ...21HM 10F SCHEMATIC DIAGRAM OF MOTHER UNIT F7340N4 00 Version Page 29 ...
Page 32: ...21HM 10F SCHEMATIC DIAGRAM OF SECAM UNIT F7343N0 00 Version ...
