PT3-H AVC3-U
Trouble of Main Switching-regulator
Is I901 in
intermittent oscillation?
Is I901
(
4
)
pin voltage
at the moment of power-ON
below 16V?
Check Q930, Q931, etc.
Yes
Check Q934, D936, D938,
I902, D909, etc.
No
A.
Is Q930
(
C
)
voltage
over 3.5V?
Check C910, D938,
T901, I901, I902, etc.
Yes
No
Check D903, D906, etc.
Yes
No
Check D905, C912, etc.
Yes
No
Is I901
(
4
)
regular voltage
below 10V?
TROUBLESHOOTING FLOWCHARTS
(2 OF 4)
48
Summary of Contents for 50HDT50
Page 34: ...34 PT3 H AVC3 U 4 7 WHITE BALANCE ADJUSTMENT OSD FLOW DIAGRAM BACK TO ADJUSTMENTS ...
Page 83: ...PRINTED CIRCUIT BOARD AVC3 U Audio Video PWB 83 PT3 H AVC3 U TABLE OF CONTENTS ...
Page 84: ...PRINTED CIRCUIT BOARD AVC3 U Audio Video PWB 84 PT3 H AVC3 U ...
Page 85: ...PRINTED CIRCUIT BOARD AVC3 U Power PWB 85 PT3 H AVC3 U ...
Page 86: ...PRINTED CIRCUIT BOARD AVC3 U Power PWB 86 PT3 H AVC3 U ...
Page 87: ...PRINTED CIRCUIT BOARD AVC3 U Control SW Jig PWB 87 PT3 H AVC3 U PT3 H FILTER PWB ...
Page 88: ...PT3 H AVC3 U PRINTED CIRCUIT BOARD PT3 H Signal Audio PWB 88 ...
Page 89: ...PRINTED CIRCUIT BOARD PT3 H Signal Audio PWB 89 PT3 H AVC3 U ...
Page 91: ...PT3 H AVC3 U BLOCK DIAGRAM FC4 Unit 91 BACK TO TABLE OF CONTENTS ...
Page 97: ...PT3 H AVC3 U AVC3 U CHASSIS WIRING DRAWING 97 ...
Page 98: ...98 PT3 H AVC3 U PT3 H CHASSIS WIRING DRAWING POWER UNIT X SUS FILTER INLET AUDIO VIDEO Y SUS ...