Sharp XG-PH70X Service Manual page 48

XG-PH70X/XG-PH70X-N (1st. Edition)
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?
Are there any sync signal at pin (5) to "V-sync" & pin (2) to "H-
sync" of IC3004?
Are there any sync signal at pin (3) to "V-sync" and pin (6) to
"H-sync" of IC3004 output?
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?
Are there any sync signal at pin (16) to "B", pin (18) to "G" and
pin (20) to "R" of IC3007 output?
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?
Are there transmission signal at pin (1,2) of T9401 output?
Are there transmission signal at pin (6,7) of T9401 input?
CN3001 is not stable or breakdown.
YES
YES
YES
YES
YES
YES
YES
NO Check IC3005 and its peripheral circuits.
NO IC3005 are breakdown.
NO Check IC3004 and its peripheral circuits.
NO Check IC3007 and its peripheral circuits.
NO Check IC3007 and its peripheral circuits.
NO Check T9401 and its peripheral circuits.
NO T9401 are breakdown.
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