Samsung HLRS078WX/XAA Service Manual page 132

Circuit Description
13-3 New Circuit Description
13-3-1 Output Voltage States of the DMD Board Parts
-- 25V
Output Terminal _f-
Waveform for 8V
RA600,601,602,603
26V
LOC Characteristics
BD904 LAMP EN High from DDP1011
BD902 LAMP LITZ High(5V) before the lamp turns on, Low(0V)
when the lamp turns on
13-3-2 DMD Panel Pin Terminal Characteristics Diagram
-_ Removethe heatsink attachedto the DMD Boardand tightenthe screwsin four placesand then inspectthe characteristics of
each pin terminal.
%
ii)_!i
i!!ii_iii!i
P14
NIC
NlC
The vertical lines, which may occur due to improper connections between the panel and the
PCB, occur with interva)s of 50 inches(26mm), if vertica) lines occur with intervals of more than
26mms, it indicates a failure of the DDP1011 (C itself, if they occur with intervals of less than
26mm, it means that more than two pins have bad connections.
[]
;Bi!i
16
i_i:iiiiii
DA,DB output wave
[Screen:WHITE]
P6
ii!i_i)_ii i!ii_ii_iiii
)_i!!_!i))
)ii!_
_iiiiii!!i_!!i!i!ii!i!!i_
[]
_iiiiii!!i_!!i!i!ii!i!!i_
m
[]
m
[]
m
m
m
[]
[]
[]
[]
[]
iiiiif_iii
!iiiii)_!i!i!!i!!i)!!)_i!i!i!i!
[]
))))_iiiiii _
[]
!ili;i!iii!i_i!i!ii!i!ii!
[]
[]
m
m
[]
[]
)i!i!ii!iiiii!!l!i!_il!i
m
[]
[]
!!!ii_iii!_ii%il
[]
[]
[]
[]
%!i)
[]
[]
%iiiil
)_!i%
%!;!i
i!iii%
[]
[]
[]
iiii_iii!i
iiiii_ii!il
iiiiii_iiii )!iiiiii_iiiiiiii
!i)ii_)_!iiiiiiiiii;_i!ilSi!!i
N
m
iiil_ii!il
i%!
ii!_i!ii ¸
_2
i)!_i!_!!i!i;_ii!i!iii_i_iiii
ii!i!ii_!ii!i!il ¸
))ii_iiiii
%i:)li
))i!_iiiiiii!
Pin Name
V
V2
DA
DB
NO.
G
Description Pin Name Description ........
Voltage : 3.3V T Test Point
VCC2 : 8V ME Mirror Bias Extra
A Channel Data Bus [When measured, there should be a waveform] C Clock
B Channel Data Bus [When measured, there should be a waveform] P# A,B Channel Positive
MBRST# (Mirror Bias Rest) 26V N# A,B Channel Negative
The part from the present position to the GND (The black part is also a GND.)
SamsungElectronics 13-7