21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
5 – 3
TROUBLE SHOOTING FLOWCHART (Continued)
NO SPECIFIC COLOUR
Is some colour produced in
B/W broadcast reception ?
Is the white balance properly
adjusted ?
Re-adjust the white balance.
The picture colour is yellow.
The picture colour is magenta.
The picture colour is cyan.
Check Q855 and its adjacent
circuits.
Check Q854 and its adjacent
circuits.
Check Q853 and its adjacent
circuits.
Check IC801.
Check IC801 and bias
control circuit.
NO COLOUR
“PAL”
(
NO COLOUR S
Y
NCHRONI
Z
ATION
)
Check X801 (4.43MHz)
Vertical linearity and size are
abnormal.
DEFECTIVE VERTICAL AMP.
AND VERTICAL LINEARIT
Y
Re-adjust vertical size.
(Bus Data)
Check R503, R506, R513,
R520 and C515.
Summary of Contents for 21F-PA18
Page 64: ...21F PD250 21F PT220 21F PA18 21F PA18 B 7 1 CHAPTER 7 CHASSIS LAYOUT 1 CHASSIS LAYOUT ...
Page 65: ...21F PD250 21F PT220 21F PA18 21F PA18 B 7 2 ...
Page 66: ...21F PD250 21F PT220 21F PA18 21F PA18 B 8 1 CHAPTER 8 BLOCK DIAGRAM 1 BLOCK DIAGRAM MAIN UNIT ...
Page 67: ...21F PD250 21F PT220 21F PA18 21F PA18 B 8 2 ...
Page 68: ...21F PD250 21F PT220 21F PA18 21F PA18 B 8 3 ...
Page 69: ...21F PD250 21F PT220 21F PA18 21F PA18 B 8 4 ...
Page 70: ...21F PD250 21F PT220 21F PA18 21F PA18 B 8 5 2 BLOCK DIAGRAM CRT UNIT ...
Page 72: ...21F PD250 21F PT220 21F PA18 21F PA18 B 10 1 CHAPTER 10 WAVEFORMS 1 WAVEFORMS ...
Page 74: ...21F PD250 21F PT220 21F PA18 21F PA18 B 11 2 2 SCHEMATIC DIAGRAM MAIN UNIT ...
Page 75: ...21F PD250 21F PT220 21F PA18 21F PA18 B 11 3 ...
Page 76: ...21F PD250 21F PT220 21F PA18 21F PA18 B 11 4 ...
Page 77: ...21F PD250 21F PT220 21F PA18 21F PA18 B 11 5 10 11 12 13 14 15 16 17 18 19 ...
Page 79: ...21F PD250 21F PT220 21F PA18 21F PA18 B 12 2 2 PWB A MAIN CHIP SIDE ...