Read Sharp XG-PH70X (serv.man4) Service Manual online
XG-PH70X/XG-PH70X-N
4 – 6
Checking the Terminal unit.
Check input sync signal circuits.
Check RGB input sync signal circuits.
Are there any sync signal at pin (3) to "V-sync" and pin (1) to
"H-sync" of IC3005?
"H-sync" of IC3005?
NO
Check IC3005 and its peripheral circuits.
YES
Are there any sync signal at pin (5) to "V-sync" & pin (2) to "H-
sync" of IC3004?
sync" of IC3004?
NO
IC3005 are breakdown.
YES
Are there any sync signal at pin (3) to "V-sync" and pin (6) to
"H-sync" of IC3004 output?
"H-sync" of IC3004 output?
NO
Check IC3004 and its peripheral circuits.
YES
CN3001 is not stable or breakdown.
Checking the Terminal unit.
Check INPUT2 sync signal circuits.
Check BNC5 RGB input signal circuits.
Are there any sync signal at pin (8) to "B", pin (10) to "G" and
pin (12) to "R" of IC3007 input?
NO
Check IC3007 and its peripheral circuits.
YES
Are there any sync signal at pin (16) to "B", pin (18) to "G" and
pin (20) to "R" of IC3007 output?
pin (20) to "R" of IC3007 output?
NO
Check IC3007 and its peripheral circuits.
YES
CN3001 is not stable or breakdown.
Checking the Terminal unit.
Check input/output signal of Lan.
Check Lan circuits.
Are there transmission signal at pin (13,14) of T9401?
Are there received signal at pin (8,9) of T9401?
NO
Check T9401 and its peripheral circuits.
YES
Are there transmission signal at pin (1,2) of T9401 output?
Are there transmission signal at pin (6,7) of T9401 input?
Are there transmission signal at pin (6,7) of T9401 input?
NO
T9401 are breakdown.
YES
CN3001 is not stable or breakdown.
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