Text preview for : diboss_lt_32htfh_onida_board_111_a84b_204.pdf part of DIBOSS diboss lt 32htfh onida board 111 a84b 204 . Rare and Ancient Equipment DIBOSS LCD LT-32HTFH diboss_lt_32htfh_onida_board_111_a84b_204.pdf
Back to : diboss_lt_32htfh_onida_bo | Home
COLOR TFT-LCD TV
SERVICE MANUAL
MODEL : LT-32HTFH
CAUTION !!
BEFORE SERVICING THE TFT-LCD TV,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
CONTENTS
Contents ------------------------------------------------------------------------- 2
Safety precautions ----------------------------------------------------------- 3
Servicing precautions ------------------------------------------------------- 4
Specifications ------------------------------------------------------------------ 5
Location of control ----------------------------------------------------------- 9
Trouble Shooting ------------------------------------------------------------- 12
Deassembly procedure ---------------------------------------------------- 14
Exploded Drawing ----------------------------------------------------------- 19
Wire dressing ------------------------------------------------------------------ 20
Adjustment instruction with Default Factory Data----------------- 21
Inspection instruction ------------------------------------------------------ 23
PCB Layout --------------------------------------------------------------------- 26
Schematic Diagram -----------------------------------------------------------31
Replacement part list -------------------------------------------------------- 32
Block Diagram ----------------------------------------------------------------- 33
Circuit descriptions ---------------------------------------------------------- 34
SERVICE MANUAL
SAFETY PRECAUTIONS
!! Important Safety Notice !!
Many electrical and mechanical parts in this chassis have special safety-related
characteristics.
These parts are identified by in the Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components
as recommended in this manual to prevent Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth
ground (Water Pipe, Conduit, etc.) and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more
sensitivity.
Reverse plug of the AC cord into the AC outlet and repeat AC voltage measurements for each
exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS, which is,
corresponds to 0.5mA.
In case any measurement is out of the limits specified, there is possibility of shock hazard and
the set must be checked and repaired before it is returned to the customer.
Leakage Current Hot Check circuit
SERVICE MANUAL
SERVICING PRECAUTIONS
CAUTION!!
Before servicing receivers covered by this service manual, read and follow the SAFETY
PRECAUTIONS on page 2 of this publication.
General Servicing Precautions
1.Always unplug the receiver AC power cord from AC power source before;