Hitachi C20 Lc880snt Service Manual

							SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
Liquid Crystal Display Television/Monitor
July 2005
 Digital Media Systems Group, Hitachi  Asia Ltd. Caution
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 liquid crystal television/monitor.
Be sure to read the cautionary items described in the manual to maintain safety before servicing. Service Warning
1.The LCD Panel Module is made of glass. When handling broken LCD Panel Module, take special care not to be injured.
2.Replacement work should only start after the LCD Panel Module and the AC/DC Power Supply has become sufficiently cool.
3.Take special care of the LCD display panel and do not damage its surface.
4.Do not touch the LCD Panel Module with your bare hands and protect its surface from stains.
5.It is recommended to use clean soft gloves during servicing in order to protect the LCD display panel and the service personnel himself. Contents
(15
” model) (20
” model)
* SAFETY NOTICE...................................................2
* DISPLAY MODES..................................................2
* SPECIFICATIONS...................................................3
* LOCATION OF CONTROLS......................................4
* CONNECTIONS......................................................7
* FACTORY SETTTINGS...........................................10
* TROUBLESHOOTING..............................................11
* SCHEMATIC DIAGRAMS.............................................12 *
PRINTED CIRCUIT BOARD........................................21
* BLOCK DIAGRAM...............................................27
* WIRING DIAGRAM.............................................28
* EXPLODED VIEW & MECHANICAL PARTS LIST..........29
* INFORMATION OF ICS...............................................31 
						

							- 2 -*
Modes, which are not listed in the above table, may not be supported. For an optimal picture it is
recommended to choose a mode listed in the table.
* For 15 ”model, there are 3 types of incoming display modes compatible with Windows as shown
in the tables above.
* For 20 ”model, there are 2 types of incoming display modes compatible with Windows as shown
in the table above.
* Sometimes, the image may be disrupted due to the frequency standard from the VGA card.
However, this is not an error. You may improve this situation by activating the automatic adjustment
or by manually changing the phase and the clock settings in the menu.
* If you switch off the TV/monitor, interference lines may occur on your screen. Please note that
this is normal.
* To extend the service life of the product, we recommend that you use your computer ’s power
management function. DISPLAY MODESSAFETY NOTICE
Maintenance and repair of this LCD TV/monitor should be done by qualified service personnel only.
Critical parts that have special safety characteristics are identified by a   in the replacement parts
list. Use of any substitute replacement part that does not have the same safety characteristics as
the recommended replacement part in the parts list might create shock, fire and / or other hazards.
Read and comply with all caution and safety related notes on or inside the LCD/monitor cabinet, the
printed circuit boards or the LCD Panel Module. Please note the following safety symbols indicated
below.
TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.RISK OF ELECTRIC
SHOCK DO NOT OPEN
CAUTION This symbol indicates 
“dangerous
voltage ” inside the product that
presents a risk of electric shock or
personal injury. This symbol indicates
important instructions
accompanying the
product.
15 ” Incoming display mode (input)
640 x 480
800 x 600
1024 x 768 Resolution
Horizontal
Frequency (KHz) 31.47 (N)
37.88 (P)
48.36 (N) Vertical
Frequency (Hz) 60.00 (N)
60.32 (P)
60.00 (N) Pixel Frequency
(MHz)25.18
40.00
65.00 Comment
DOS
VESA
VESA 20
” Incoming display mode (input)
640 x 480
800 x 600
Resolution
Horizontal
Frequency (KHz) 31.47 (N)
37.88 (P) Vertical
Frequency (Hz) 60.00 (N)
60.32 (P) Pixel Frequency
(MHz)25.18
40.00 Comment
DOS
VESA 
						

							- 3 -SPECIFICATIONS
Operating Temperature
Operatiing Humidity
Storage Temperature
Storage Humidity
Panel Model
     C15-LC880SNT C20-LC880SNT Size
Display Size
Pixel Pitch
Viewing Angle (H/V)
Screen Tilt Angle
15.1
”
304.1(H) X 228.1(V)mm
0.297(H) X 0.297(V)mm 
						

							- 4 -Remote Control
1.RECALL button
To display setup information of channel
2.MUTE button
To switch on/off sound mute
3.TV/VIDEO button To select TV, AV1, AV2, S-Video, COMP, VGA or DVI mode
4.STANDBY button To switch on the LCD TV/monitor when at standby mode or vice versa
5.PICTURE button
To select picture effect mode (Standard/Soft/Custom/Bright)
6.SLEEP button To on/off sleep mode and set the sleep timer LOCATION OF CONTROL (Continued)
1 2
4
10 3
5
7 6
8
9
11 12
14
1213
15
16
17 1516LOCATION OF CONTROL 
						

							- 5 -7.SOUND button
To select the sound effect mode (Custom/News/Cinema/MusicHall)
8.TIME button
To display the preset time
9.NUMBER buttons To directly select program number
10.DIGIT button To select one, two or three-digit program number input options
11.LST-CH button
To return to previously selected program number
12.TELETEXT buttons (OPTIONAL) These buttons are used for certain models with Teletext functions only. For further details, refer
to the  “TELETEXT FUNCTION ” section in this manual
13.CH  I/II button
To switch between NICAM / A2 stereo and mono sound output
14.TV MENU button To enter the TV menu directly to tune the programs
15.P-/+ ( ) buttons
To select previous / next program and to operate the menu
16. -/+ ( ) buttons
To decrease / increase volume and to adjust the menu
17.MENU button To enter or exit from the MENU (TV/AV mode)
To accept your selection (PC mode) LOCATION OF CONTROL 
						

							- 6 -Front and Side Panels
1.TV/VIDEO button
To select TV, AV1, AV2, S-Video,
COMP, VGA or DVI mode
2.MENU button To enter or exit from the menu
3.PROGRAM buttons To select previous/next program
4 .VOLUME buttons To decrease/increase volume 5.STANDBY button
To switch on when at standby mode or vice
versa
6.POWER INDICATOR Lights up in red when the set is on standby;
Lights up in green when the set is power on
7.REMOTE CONTROL SENSOR Infrared sensor for the remote control
For 15
” model
For 20 ” model 5
6
71
2
3
4
1
2
3
4 5
6 7LOCATION OF CONTROL 
						

							- 7 -Connecting The Antenna
Note:
*
Aerial connections: Standard-phono socket 75  or F connector.
.
* Input impedance: 75  unbalanced.
* For Australia only -Install an external aerial conforming to AS 1417.1 for safety purpose. CONNECTIONS
Antenna 
						

							- 8 -Connecting The PC
STEPS:
1.Switch off all power supplies to the equipment and TV set before connection
2.Connect the signal and audio cables from the computer output terminal to the TV
3.Connect power cord
4.Switch on the TV first, then switch on the computer
5.If the TV still does not function properly, please refer to the troubleshooting section to diagnose
the problem.
* Please do not open the cover of the TV
Note:
Do not pull the cables. When connecting and disconnecting the cables, do it with your hand holding
the connector. CONNECTIONS To Audio output
To Audio input
 (AV2)
To Signal input
 (D-sub)
To Signal output
 (D-sub)
To DVI input
To DVI output
 
						

							- 9 -CONNECTIONS
Connecting AV Equipment
This TV set provides AV1, AV2 input terminals, S-Video and a group of Y/Pb/Pr terminal for connection
to VCR, VCD, DVD or other video equipment.
Please refer to the instruction manual of the other equipment for more information on the connection
to the TV.
’
Note:
* Please disconnect all the power supplies to the equipment and TV set before connection.
* Do not pull the cables. When connecting and disconnecting the cables, do it with your hand
holding the connector.
* Only 1 set of audio cable is to be connected to Audio input terminals of AV2. VIDEO EQUIPMENTTo Audio output

To Audio
input (AV2)
VIDEO EQUIPMENT
VIDEO EQUIPMENT
VIDEO EQUIPMENT To Audio
input (AV2)
To Audio
input (AV2)
To Audio output
To Video output
To Video input
To Video and
Audio input
To Video and
Audio output
To Component
input
To S-Video
input
To Component
output
To S-Video
output
To Audio input
(AV2)
 
						

							- 10 -FACTORY SETTINGS
1.Press MENU button, then press 3210 using the number button on the remote control to enter into the factory setting.
2.The factory setting menu will be displayed on the screen. The following table is shown when in AV mode:
 Item   Factory setting         C15-LC880SNT C20-LC880SNT
   1 Basic Setting Backlight50
NVRAM Addr
NVRAM Val
   2 Color Setting Auto Adjust
Red0
Green 0
Blue 0
Red Offset 0
Green Offset 0
Blue Offset 0
Min Volume 0
Max Volume 68
   3 Sound Setting Dot1 X  Pos31
Dot1 Y  Pos 69
Dot2 X  Pos 62
Dot2 Y  Pos 81
   4 4200K 5000K Warm Brightness128
Contrast 128
Red 247
Green 237
Blue 237
   5 STANDARD Brightness128
Contrast 128
Red 255
Green 255
Blue 255
   6 COOL Brightness128
Contrast 126
Red 224
Green 228
Blue 251
   7 CUSTOM Brightness128
Contrast 128
Red 255
Green 255
Blue 255
   8 Advanced Setting Factory Mode1
Power Mode 1
Panel Index 34
Decder SatHue 0
Enable Zoom 1
Enable SCART P  1
1
Enable DVI Port 1
Factory Reset
   9 Version Info V1.9-C15-LC880SNT V1.9-C20-LC880SNT
ADDC:V8-L15GC1-A1D01 ADDC:V8-L20GC1-A1D01
DDDC:V8-L15GC1-A1D02 DDDC:V8-L20GC1-A1D02