Samsung HLR5078WX, Руководство по обслуживанию

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Circuit Description
Samsung Electronics 13-7
13-3 New Circuit Description
13-3-1 Output Voltage States of the DMD Board Parts
25V
8V
- 26V
25V
8V
- 26V
High(5V) before the lamp turns on, Low(0V) LAMP LITZ BD902
LAMP EN BD904
Characteristics LOC
when the lamp turns on
High from DDP1011
Output Terminal
Waveform for
RA600,601,602,603
13-3-2 DMD Panel Pin Terminal Characteristics Diagram
※
Remove the heat sink attached to the DMD Board and tighten the screws in four places and then inspect the characteristics of
each pin terminal.
The vertical lines, which may occur due to improper connections between the panel and the
PCB, occur with intervals of 50 inches(26mm). If vertical lines occur with intervals of more than
26mms, it indicates a failure of the DDP1011 IC itself. If they occur with intervals of less than
26mm, it means that more than two pins have bad connections.
DA,DB output wave
[Screen:WHITE]
Pin Name Description Pin Name Description
V Voltage : 3.3V T Test Point
V2 VCC2 : 8V ME Mirror Bias Extra
DA A Channel Data Bus [When measured, there should be a waveform] C Clock
DB B Channel Data Bus [When measured, there should be a waveform] P# A,B Channel Positive
NO. MBRST# (Mirror Bias Rest) 26V N# A,B Channel Negative
G The part from the present position to the GND (The black part is also a GND.)