Alignment and Adjustments
Samsung Electronics
1-25
Engine Failure Inspection Flow Chart for the DMD Board
1) When the power cord is plugged in,
2) DC 380V is automatically supplied to the ballast.
1) When the power key is pressed via the remote control, the
micom of the digital board outputs high (5V) PWR signals.
2)
The power board operates normally
. 5V and 12V are supplied
to the DMD CN105 terminal.
1)
The MTR Reset signal is supplied to the R161 terminal of the
motor IC101 from the micom on the digital board and then the
motor starts to drive.
2) If the color wheel rotates for a certain time and then stops,
check whether the color wheel sensor is normal.
(Check the waveform on the No.2 terminal
below CN102.)
1) Check whether the signal (SCI: ST
AR
T
CONTROL
INPUT)
that turns on lamp #2 of CN109 on the DMD board is high (5V).
1) Method for checking whether the DDP1010 IC RESET
is normal.
1) Check whether the signal and the voltage are output normally
to the data line of DMD panel.
1) Check whether the DC380V power
is supplied to the ballast.
1) Check whether 5V and 12V are
supplied to the CN105 terminal.
1)
After the set is powered on, check
whether 5V is detected on pin No.49
of IC101.
*
After a while, the sound generated by
the rotating color wheel is heard.
1) Check whether CN109 #2
signal is 5V
.
1) If the voltage between R254 and
R255 is 3V
, it is normal.
1)
A
waveform should be output on the
data line.
* Refer to the remarks.
* For domestic model, it is needed to
check whether the master power switch
is turned on.
*
The US model has no master power
.
* 12V must be supplied to operate the
motor
. (The voltage of the motor driving
power is 12V
.)
* If 5V is not detected, the motor will
not operate.
* When SCI is high (5V), the lamp litz of
CN109 is low (0V).
* CN109 #2 terminal voltage changes to
pulse waveform 14 seconds after
(for 50 inch
TV) the time that the
voltage is 5V
.
* When about 4 seconds have passed
after changing to pulse waveform, the
screens are displayed on the set.
No.
Description
Remark
Key Point
Содержание HLN507W1X/XAA
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