Read Sharp XG-PH70X (serv.man4) Service Manual online
XG-PH70X/XG-PH70X-N
4 – 5
Checking the Main unit.
Check output sync signal of input 1 and 2.
Check input sync signal circuits.
Are there any sync signal at pin (2) to "V-sync" and pin (5) to
"H-sync" of IC3001 input?
"H-sync" of IC3001 input?
NO
Check IC3001 and its peripheral circuits.
YES
Are there any sync signal at pin (6) to "V-sync" & pm (3) to "H-
sync" of IC3001 output?
sync" of IC3001 output?
NO
IC3001 is breakdown.
YES
CN3001 is not stable or breakdown.
Checking the Terminal unit.
Check INPUT2 sync signal input.
Check BNC RGB input sync signal circuits.
Are there any sync signal at pin (11) to "V-sync" and pin (13) to
"H-sync" of IC3005 input?
"H-sync" of IC3005 input?
NO
Check IC3005 and its peripheral circuits.
YES
Are there any sync signal at pin (5) to "V-sync" and pin (2) to
"H-sync" of IC3002 input?
"H-sync" of IC3002 input?
NO
IC3005 are breakdown.
YES
Are there any sync signal at pm (3) to "V-sync" & pin (6) to "H-
sync" of IC3002 output?
sync" of IC3002 output?
NO
Check IC3002 and its peripheral circuits.
YES
CN3001 is not stable or breakdown.
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