SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
LCD
Television
March 2004 Digital Media Division
28LD5200E
(PW1L)
SERVICE MANUAL
Be sure to read this manual before servicing. To assure safety from fire, electric shock, injury, harmful radiation
and materials, various measures are provided in this HITACHI LCD monitor.
Be sure to read cautionary items described in the manual to maintain safety before servicing.
Caution
1. Features -------------------------------------------------- 3
2. Specifications-------------------------------------------- 4
3. Component names ------------------------------------- 5
4. Adjustment ----------------------------------------------- 6
5. Troubleshooting --------------------------------------- 19
6. Self diagnosis function ------------------------------ 22
7. Replacement parts list------------------------------- 23
8. Block diagram ----------------------------------------- 24
9. Connection diagram --------------------------------- 26
10.Wiring diagram ---------------------------------------- 27
11. Disassembly diagram-------------------------------- 28
Contents
1. Since Panel Module is made of glass, handling the broken Module shall be taken care sufficiently in order
not to be injured.
2. Replacing work shall be started after the Panel Module and the AC/DC Power supply become sufficiently
cool.
3. Special care shall be taken to the display area in order not to damage its surface.
4. The Panel Module shall not be touched with bare hand to protect its surface from stains.
5. It is recommended to use clean soft gloves during the replacing work in order to protect not only the dis-
play area of the Panel Module but also a serviceman himself.
Service Warning
SM008
2
28LD5000TA (PW1L)
CAUTION FOR SAFETY
Please read this page before repair
ing the monitor.
This page explains t
he following items to ensure the safety of set and prevent accidents
during repair work.
We explain by symbol
s what damage or injury may occur if errors are made.
Warning
This symbol means "possible to
cause death or serious injury"
Caution
This symbol means "possible to
cause damage or something may break"
We
symbols below have the following meanings.
This symbol means "CAUTION"
This symbol means "POSSIBLE to
ELECTRIC SHOCK"
This symbol means "MUST"
This symbol means "DO NOT"
Should follow instructions.
Indicates cabinet, chassis and parts
by label, which
need special attention.
Please follow note
s and Safety Instruc-
tions of User's Manual.
Prevent electric shock.
Please take care during working because
monitor has high voltage part and power
supply part.
Possible to die if you tou
ch these
place
s by mistake.
Please disconnect power plug during
overhaul, reassembl
y or changing parts.
You
could die or suffer from electric
shock if you touch live part.
Use recommended components.
Please use same characteristic compo-
nent, which is same as
original for your
safety and reliability
. Especially those
marked by
in parts list and circuit dia-
gram.
It
may cause electric shock or fire if you
use non-recommended component.
Should
keep same style of wiring or component.
Monitor uses tubes or tapes, which
are
insulator
s, and some components are
ke
pt a distance from surface of PWB for
safety.
Internal leads kept from hot part or high volt-
age part by clamper or styling, so please
return to original condition
to prevent elec-
tric shock or fire.
Should do safety check
when finished.
Every part (removed screws, component
and wiring) should be returned to previous
condition.
Check around repair for
possible
damage by mistake and measure the
insulated impedance by meg-ohm meter.
Confirm the value of impedance, that
value is more than 4M ohm.
It
could cause electric shock or fire if this
value is less than 4M ohm.
Nobody can check and repair the code
and combination circuit of HDCP.
Never remove the shield case, which is
attached to the code and combination
circuit of HDCP.
WARNING
28LD5200E (PW1L)
PRECAUTIONS
How to clean the LCD screen panel of the monitor
Before cleaning the monitor, turn off the monitor and disconnect the power plug from the power outlet.
To prevent scratching or damaging the LCD screen face, do not knock or rub the surface with sharp or hard
objects. Clean the screen with a soft cloth moistened with warm water and dry with a soft cloth. If it is not
enough, then use a cloth with mild detergent. Do not use harsh or abrasive cleaners.
How to clean the cabinet of the monitor
Use a soft cloth to clean the cabinet and control panel of the monitor. When excessively soiled dilute a neutral
detergent in water, wet and wring out the soft cloth and afterward wipe with a dry soft cloth.
Never use acid/alkaline detergent, alcoholic detergent, abrasive cleaner, powder soap, OA cleaner, car wax,
glass cleaner, etc. especially because they would cause discoloration, scratches or cracks.
1. Features
Large-screen, high-definition LCD panel
The 28-inch color LCD panel, with a resolution of 1280 (H) x 768(V) pixels, creates a high-definition, large-screen
(aspect ratio : 15:9) and low-profile flat display. Free from electromagnetic interferences from geomagnetic sources
and ambient power lines, the panel produces high-quality display images free from color misconvergence and display
distortion.
High Performance Digital Processor
A wide range of personal computer signals can be handled, from 640 x 400, 640 x 480 VGA to 1600 x 1200 UXGA.
(RGB Analog input)
Easy-to-use remote control and on screen display system
The remote control included eases the work of setting display controls. Further, the on-screen display system,
displays the status of signal reception and display control settings in an easy-to-view fashion.
Power saving system
The International ENERGY STAR power saver feature saves power consumption automatically when input sig-
nals are not available.
When connected to a VESA DPMS-compliant PC, the monitor cuts its power consumption while it is idle.
TruBass
TruBass, SRS and ( ) symbol are trademarks of SRS Labs,Inc.
TruBass technology is incorporated under license from SRS Labs, Inc.
One mini D-sub terminal and one DVI-D terminal for RGB input
The D-sub terminal can also receive the RGB-component by On-Screen Display control.
One composite/S.video input terminal and two component video input terminals.
One component input is possible to switch to RGB signal input from the Menu screen.
One SCART terminal for the signal of the European standard.
It operates as composite/S.video input and RGB input terminal, or composite video output terminal.
One composite video output terminal as a monitoring output.
Various input/output terminals.
Tuner and TELETEXT receiver.
High performance type of the remote control.
3
4
28LD5200E (PW1L)
2. Specifications
Panel
Display
dimensions
Approx. 28 inches (599.04 (H) x 359.42 (V) mm)
Resolution
1280 (H) x 768 (V) pixels
Net dimensions
854 (W) x 516 (H) x 277 (D) mm
Net weight
21.9kg
Ambient
conditions
Temperature
Operating : 5 C to 35 C, Storage : 0 C to 60 C
Relative humidity
Operating : 20% to 80%, Storage : 20% to 90% (non-condensing)
Power supply
AC100 - 240V, 50/60Hz
Power consumption/at standby
155W / <1W
Audio output
12W + 12W (6 )
(RGB input)
Input signals
Input terminals
RGB1 DVI input terminal (DVI-D)
RGB1 audio input terminal (3.5mm Stereo Mini Jack)
RGB2 analog RGB input terminal (D-sub 15-pin)
RGB2 audio input terminal (3.5mm Stereo Mini Jack)
Video signals
0.7 V/1.0 Vp-p, analog RGB (Recommended Signal)
480i, 576i, 480p, 576p, 1080i/50, 1080i/60, 720p/60
Sync signals
H/V separate, TTL level [2K ]
H/V composite, TTL level [2K ]
Sync on green, 0.3 Vp-p [75
]
(Video input)
Input signals
Input terminals
AV1: composite video input terminal (RCA)
AV1: Y PB PR video input terminal (RCA)
AV1: L/R audio input terminal (RCA)
AV2: composite video input terminal (RCA)
AV2: Y/G PB/B PR/R video input terminal (RCA)
AV2: L/R audio input terminal (RCA)
AV3: composite video input terminal (RCA)
AV3: S video input terminal (RCA)
AV3: L/R audio input terminal (RCA)
AV4: composite video / S video / RGB / L/R audio input terminal (Scart)
Video signals
AV1: PAL, SECAM, NTSC3.58, NTSC4.43
AV1: 480i, 576i, 480p, 576p, 1080i/50, 1080i/60, 720p/60
AV2: PAL, SECAM, NTSC3.58, NTSC4.43
AV2: 480i, 576i, 480p, 576p, 1080i/50, 1080i/60, 720p/60, RGB
AV3: PAL, SECAM, NTSC3.58, NTSC4.43
AV4: PAL, SECAM, NTSC3.58, NTSC4.43
AV4: RGB
Video output Signal
OUTPUT (MONITOR): composite video monitor-output terminal (RCA)
OUTPUT (MONITOR): L/R audio monitor- output terminal (RCA)
AV4: composite video / L/R audio output terminal (SCART)
(RF input)
Input signals
Input terminals
ANT : 75
Unbalanced
RF Video System
PAL B, G, H / I / D, K
SECAM B, G / D, K / K1
Applicable video signals for each input terminal
Terminal
RCA/SCART
DVI
D-sub
Signal
CVBS
S-video
Component
RGB
PC
STB
RGB
Component
AV1
AV2
AV3
AV4
RGB1
RGB2
(
:Available)
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28LD5200E (PW1L)
3. Component names
CLE-958
PROGRAM DOWN
button (
SELECT
button)
INPUT SELECT button
(OK button)
PROGRAM UP button
(
SELECT button)
These buttons are located on the top.
SUB-POWER button
Control panel
VOLUME
UP/DOWN
buttons
(
ADJUST buttons)
MENU button
( ) indicates the function while the MENU is displayed on the screen.
[ Remote Control ]
[ Main unit ]