45
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4 POWER SUPPLY Vs, Va voltage adjustment
Item
Power Unit Vs, Va Adjustment
Adj. point
Refer to following
Adjustment Preparations
Adjustment Procedures
Remarks
(1) Turn on the set and perform
pre-heat run more than 1 min
on burn-in screen.
(1) Turn Vs ADJ to adjust Vs voltage
to be within
r
0.1V of the value
specified in the label on the panel.
Permissive level of voltage in
sufficient time of heat-run
performed is:
Vs: within
r
0.1V
(2) Receive full black pattern signal
(or video silence signal; but the
power will be automatically turned
off after a few seconds by power
save function.)
(2) Turn Va ADJ to adjust Va voltage
to be within
r
0.2V of the value
specified in the label on the panel.
Va: within
r
0.2V
(3) Connect voltmeter (which has an
error within 0.02V or less) leads
to Vs (or Va) and GND test points
of the power unit.
(3) Reconfirm that Vs voltage remains
within
r
0.1V of the specified value.
Readjust if it’s outside of the margin
.
[Label example]
Label position (Reference)
: Upper left
If it’s hard to read the voltage
value because of the wiring
positions, write it down by a
marker at visible place in
advance.
<LOT>N6
Vs= 80.0V Va=60.0V
V
윘
=140.0V Vx=60.0V
DW
3
U
50”
̪
Never touch this VR !
(This is already adjusted.)
CN99
㧦
Vs/Va
Test pins
(1)pin: Va
(2)pin: Vs
(3)pin: GND
̪
Never touch this VR !
(This is already adjusted.)
̪
Never touch this VR !
(This is already adjusted.)
Vs1
㧦
Vs Coarse ADJ. VR
Vs2
㧦
Vs Fine ADJ. VR
Va1
㧦
Va Coarse ADJ. VR
Va1
㧦
Va Fine ADJ. VR
Summary of Contents for P50H4011
Page 64: ...DW3U 63 FINAL WIRING DIAGRAM TABLE OF CONTENTS ...
Page 76: ...FINAL ASSEMBLY GUIDE TABLE OF CONTENTS 75 DW3U ...
Page 77: ...FINAL ASSEMBLY GUIDE 76 DW3U ...
Page 78: ...FINAL ASSEMBLY GUIDE 77 DW3U ...
Page 79: ...FINAL ASSEMBLY GUIDE 78 DW3U ...
Page 80: ...FINAL ASSEMBLY GUIDE 79 DW3U ...
Page 81: ...FINAL ASSEMBLY GUIDE 80 DW3U ...
Page 82: ...FINAL ASSEMBLY GUIDE 81 DW3U ...
Page 83: ...FINAL ASSEMBLY GUIDE 82 DW3U ...
Page 84: ...FINAL ASSEMBLY GUIDE 83 DW3U ...
Page 97: ...BACK TO TABLE OF CONTENTS 96 PRINTED CIRCUIT BOARDS DW3 U TERMINAL PWB Component side DW3 U ...
Page 98: ...PRINTED CIRCUIT BOARDS DW3 U TERMINAL PWB Solder side DW3 U 97 ...
Page 99: ...PRINTED CIRCUIT BOARDS DW3 U SD PWB Component side DW3 U 98 ...
Page 100: ...PRINTED CIRCUIT BOARDS DW3 U SD PWB Solder side DW3 U 99 ...
Page 102: ...PRINTED CIRCUIT BOARDS DW3 U FILTER PWB Component side DW3 U 101 Component side ...
Page 103: ...PRINTED CIRCUIT BOARDS DW3 U FILTER PWB Solder side DW3 U 102 Solder side ...
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