Hitachi 28ld5000ta Service Manual

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 fi re, 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 saf\
ety before servicing.
Caution 
1. Features...

2
28LD5000TA (PW1L) 
CAUTION FOR SAFETY
Please read this page before repairing the monitor.
This page explains the following items to ensure the safety of set and prevent accidents 
during repair work.
 We explain by symbols 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...

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 abrasi\
ve cleaners.
● How to clean the...

4
28LD5200E (PW1L) 
2. Specifications
PanelDisplay
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 / 

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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 ]
 

6
28LD5200E (PW1L) 
4.Adjustment
● How to get to Adjustment mode
Using the front control buttons with the set turned off (standby) can activate it.
Press the SUB-POWER(
) button, INPUT SELECT() button and   button at the same time, and hold 
for more than 5 seconds.
The set turns on in adjustment mode with OSD.
● Changing data and Selecting Adjustment code
When the set is in adjustment mode, the cursor   ,   ,   ,   and OK buttons of the remote control or front 
panel may be used as the adjustment keys....

7
28LD5200E (PW1L) 
 Service adjustment items by  I2C-bus controlO : Should be adjusted

 : Should be followed previous data
Function
ADJ. No. Adjustment Items Mode Maximum
Value DefaultFormatter
PWB VIDEO
PWB TUNER
PWB LCD
PANEL
0 R DRIVE1 [TV/VIDEO/DSUB-COMP] COOL 255 230 
 O
1 G DRIVE1 [TV/VIDEO/DSUB-COMP] COOL 255 230 
 O
2 B DRIVE1 [TV/VIDEO/DSUB-COMP] COOL 255 255 
 O
3 R DRIVE2 [TV/VIDEO/DSUB-COMP] NORMAL 255 230 
 O
4 G DRIVE2 [TV/VIDEO/DSUB-COMP] NORMAL 255 230 
 O
5 B DRIVE2...

8
28LD5200E (PW1L) 
O : Should be adjusted

 : Should be followed previous data
Function
ADJ. No. Adjustment Items Mode Maximum
Value DefaultFormatter
PWB VIDEO
PWB TUNER
PWB LCD
PANEL
Changed Component
94 S_GP
-30
95 S_V_ID -10
96 BELL/HPF -33
97 Cb offset1 MAIN 15 8
98 Cr offset1 MAIN 15 8
99 Cb offset1 SUB 15 8
100 Cr offset1 SUB 15 8
101 Sharpness Gain(VIDEO) PAL MAIN 15 10
102 Sharpness Gain(RF) MAIN 15 5
103 Sharpness EQ(4.5MHz) MAIN 3 1
104 Sharpness EQ(5.5MHz) MAIN 3 1
105 Sharpness...

9
28LD5200E (PW1L) 
O : Should be adjusted

 : Should be followed previous data
Function
ADJ. No. Adjustment Items Mode Maximum
Value DefaultFormatter
PWB VIDEO
PWB TUNER
PWB LCD
PANEL
Changed Component
188 Upper Limits Value for Sync Detect of 2ms interval For AFC at TV mode 254 40
189 Lower Limits value for Sync Detect of 2ms interval For Free Running at TV mode 254 30
190 Upper Limits Value for Sync Detect of 2ms interval For Free Running at TV mode 254 45
191 Lower Limits value for Sync Detect of 2ms...

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28LD5200E (PW1L) 
O : Should be adjusted

 : Should be followed previous data
Function
ADJ. No. Adjustment Items Mode Maximum
Value DefaultFormatter
PWB VIDEO
PWB TUNER
PWB LCD
PANEL
Changed Component
282 Display of internal temperature C°(Temperature)
125 -
283 Display of Panel map version 255 -
284 accumulation time for Panel (hours) 65535 -
285 Initialize function 0:Keep data, 1:Initialize No.0-No.23,30-33,42-45,289,293,294Adj No.741-743, 1 -
286 L standard PLL gating HIGH [Europe model] 10
287...