35
21HS-50H
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 21HS-50H
Page 12: ...12 21HS 50H CHASSIS LAYOUT MOTHER UNIT CRT UNIT ...
Page 27: ...27 21HS 50H ...
Page 31: ...31 21HS 50H SCHEMATIC DIAGRAM OF CRT F7341N0 00 Version 1 I H G F E D C B A 2 3 4 5 6 7 ...
Page 32: ...32 21HS 50H CRT UNIT BLOCK DIAGRAM 1 I H G F E D C B A 2 3 4 5 6 7 ...
Page 33: ...33 21HS 50H MOTHER UNIT BLOCK DIAGRAM 1 I H G F E D C B A 2 3 4 5 6 7 ...
Page 43: ...43 21HS 50H NOTES ...
