Alignment and Adjustments
1-10
Samsung Electronics
Fourth
[Lamp
replacement]
Remove the cover lamp screw as shown
in the figure below
.
Remove the screws on both sides
of the lamp.
Pull the lamp out while holding its
knob, and then replace it with a
new one.
Lastly
, assemble the cover lamp.
Check whether the new lamp
turns on.
Fifth
[Ballast
operation
check]
Cover lamp
The screen should be turned on.
Open the back cover of the set and short
the protection switch.
Check whether the power and the lamp enable
signal have been supplied to the ballast.
Repair plan
Press the switch to cause a short.
On the right side of
the back of the set.
1) If 5V is applied to the CN2 terminal of the ballast,
but the lamp does not turn on, replace the ballast.
2) When 5V is not supplied, replace first the DMD
board attached to the engine.
If the lamp still does not work, replace the engine.
* For repair methods of the DMD board, refer to
separate instructions.
Sixth
[The lamp is
normal,
but a blank
screen fail-
ure occurs.]
Check the signal supply procedure.
[Check whether the signals are supplied from the
analog board to the digital board]
Method for inspecting whether signals are
being supplied from the digital board to
the DMD board
DMD board inspection method
1) Check in which mode the screen does not display
.
2) If the RF
, VIDEO, DVD, or DTV mode screen
does not display
, check the
Analog CN51
1 termi-
nals, Digital CN102 connector connections, and
their signaling.
3) If the DVI or PC mode screen does not display
,
replace and inspect the digital board.
4) If the screen does not display in any mode, check
whether the signals are being output from the
digital board.
Check the output of the IC1
17 terminal.
If the signal output state is normal, susp-
ect the DMD board.
* Refer to the Digital Board Description
Diagram.
1) Check w26V and -26V is being supplied to
the DMD board.
-> If the voltage is abnormal, replace the tantal cond-
enser (C108, C109: When failure occurs intermittently
.)
If the problem continues after replacement, then rep-
lace the power drive IC (IC107).
2) If the DMD voltage is normal, replace the panel, or
reassemble the panel.
(T
ry to fix the four silver screws again.)
* Refer to the DMD Board Description Diagram.
2
CN2
CN1
1. Check whether 5V is supplied to the blue terminal of CN2
2. Check whether DC 380V is supplied to both end
terminals of CN1
Summary of Contents for HLN507W1X/XAA
Page 25: ...Alignment and Adjustments Samsung Electronics 1 23 ...
Page 26: ...Alignment and Adjustments 1 24 Samsung Electronics Description of Terminal Characteristics ...
Page 34: ...Alignment and Adjustments 1 32 Samsung Electronics ...
Page 58: ...Alignment and Adjustments 1 56 Samsung Electronics MEMO ...
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