Hitachi 55HDM71 - 55" Plasma Panel, Service Manual

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55PMA550/55HDM71 (PW1)
Troubleshooting (PICTURE)
[VIDEO PWB Circuit]
No picture, no color or dark
Check Formatter PWB
Are waveforms at pin1(Y),
Pin3(CB) and pin5(CR)
of PYM?
Check Q205, Q206, Q207 etc.
Are waveforms at pin39(Y), 41(CB)
and 43(CR) of I202?
Video Input
Component Input
Are waveforms at pin 37(Y), 36(CB)
and 35(CR) of I202?
Yes
Yes
Yes
No
No
No
Check I501
Are waveforms at pin25 (Y)
and 27 (C) of I301?
Check Input terminal
Are waveforms at pin44 (Y)
and 43 (C) of I501?
Check I202
Check Q508, Q509,
and Q510
Are waveforms at pin9(Y), 11(CB)
and 13(CR) of I202?
PAL/SECAM
Are waveforms at pin21(Y), 22(CB)
and 23(CR) of I501?
NTSC
Are waveforms at pin5 (Y)
and 7 (C) of I501?
Yes Yes
Yes
Yes
Yes
No
No
No
No
No
Check Q203, Q301 Q307 etc.
Check Q322 Q327
X304 or X305, etc.
Check I301
Yes Yes
No
Check Q317 Q324,
Q328, X302 or X303, etc.
Are waveforms at pin89 (Y)
and 88 (C) of I302?
Yes
No
Check I201 etc.
Are waveforms at pin7
of I301?
Are waveforms at pin93
of I302?
Yes
No
Are waveforms at pin44
of I201?
Check I3A1
Single picture or Main picture Sub picture Trouble of Sub picture
No