Sharp XG-PH70X (serv.man4) Service Manual ▷ View 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.
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.
XG-PH70X/XG-PH70X-N
4 – 7
Checking the Terminal unit.
Check input signal of INPUT1.
Check RGB input signal circuits.
Are there signal at C3031(B), C3038(G) and C3041(R) output?
NO
Check C3031(B), C3038(G), C3041(R) and its peripheral circuits.
YES
Are there any sync signal at pin (16) to "B", pin (18) to "G", pin
(20) to "R" of IC3007 output?
(20) to "R" of IC3007 output?
NO
Check IC3007 and its peripheral circuits.
YES
CN3001 is not stable or breakdown.
PC board check
Is the user menu displayed?
YES
Checking the RGB input.
NO
OSD check
Checking the component input.
Checking of VIDEO input.
DVI digital input check.
End.
0
XG-PH70X/XG-PH70X-N
4 – 8
OSD check
Is the user menu normally displayed with the MENU
key?
key?
YES
OSD is normal.
NO
Enter the process menu to select PATTERN. Select
the COLOR pattern.
the COLOR pattern.
Is the OSD display color normal?
NO
Adjust the DLP system with the process adjustment.
YES
Select the STEP signal.
Is the STEP signal normal?
YES
Rewrite the OSD data.
NO
Are signals suitable for STEP signals sent to
TL8047, 8048 and 8049?
TL8047, 8048 and 8049?
NO
IC8025 is defective.
YES
Go to "Checking the periphery of GA5".
Rewrite the OSD data.
0
0
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