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50NP4
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Sharp 50NP4 Service Manual page 58
Projection color television
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Contents
Table of Contents
Troubleshooting
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2. INCORRECT COLOR
Incorrect color
Color condition
Defective
white balance
Are
voltages at pin
(41)(42) and (43) of
I205 normal?
Yes
Are
voltages at pin
(1)(3) and (5) of PZC
connector normal?
Yes
A
Is
No color
I/Q signal input at
pins(51)(52) of
IX01
Is
waveform at pin
(18) (20) of
PFC2(U205)
Is
No
waveform at pin
(4)(5) of PFC1(U205)
normal
IX01
Is
No
waveform at pin
(19)(21) of I205
normal
QX31,QX32,DX11
QX36,QX37,DX12
QX41,QX42,DX13
Is
input signal RF or
Composite
signal
Yes
Is
waveform at pin
(1)(3) of I205
normal?
Is
waveform at pin
(47)(48) of I201
normal?
B
Yes
No
Normal
QX22~QX27,QX52~QX55,IX02
Abnormal
Normal
Abnormal
Normal
Q229~Q231, Q236
Abnormal
Q232~Q234, Q237
No
waveform at pin
(7)(9) of I205
Abnormal
I406, Q426, Q427
Q438, Q439, etc
Normal
Abnormal
I205
Normal
Q220, Q221
Abnormal
55
IX01
U205
Is
Normal
normal?
I205
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Models: 50Np4/60Np4 Projection Color Television Service Manual
1
Service Adjustments
24
Table of Contents
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60np4
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