XG-NV1E (serv.man5). Troubleshooting table - page 22-38 - Sharp Projector Service Manual (repair manual). Page 5

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XG-NV1E
XG-NV1EA
TROUBLE SHOOTING TABLE 
(Continued)
26
Checking the G signal line of output PWB
No
Yes
Connector CC poorly soldered or in 
trouble.
Are outputs at pins (3), (4) and (5) of 
IC4034 as specified?
Are there signal inputs at pins (1) 
each of IC4038 thru IC4043?
Check connector CC. Do signals go 
to pins (4), (5), (7), (8), (10) and (11) 
of this connector?
IC4034, IC5002 or nearby circuit in 
trouble.
Yes
Are there signal outputs at pins (7), 
(8) and (14) of IC4044 and IC4045?
IC4038 thru IC4043, IC4044, IC4045 
or nearby circuit in trouble.
Yes
Are signals fed from pins (2) thru (7) 
of connector GP to the panel?
Connector GP poorly soldered or in 
trouble.
Yes
Does flicker happen?
Go to "Checking the image for 
shifting".
Yes
Is frame pulse fed to pin (1) of 
connector GP?
Yes
Is common bias at pin (24) of 
connector GP as specified?
Yes
Panel in trouble.
Yes
Yes
Q4024, Q4025, Q4026 or their signal 
line in trouble.
Does frame pulse go out of IC4077?
Yes
Are FRP1 and FRP2 signals fed to 
pins (9) and (12) of IC4077?
Any of IC4038 thru IC4043 faulty.
Checking the image for shifting
Yes
Yes
IC1001 or nearby circuit in trouble.
Are signals fed via IC4074, IC4075 
and IC4076 to the panel?
Panel in trouble.
Are signals fed to IC4074, IC4075 
and IC4076?
IC4074, IC4075, IC4076 or nearby 
circuit in trouble.
IC4077 or nearby 
circuit in trouble.
No
IC1001 or nearby 
circuit in trouble.
No
No
No
No
No
No
No
No
No
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