Hitachi C20-LC880SNT, C15-LC880SNT User Manual
(15” model)
(20” model)
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
* 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
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
Liquid Crystal Display Television/Monitor
July 2005 Digital Media Systems Group, Hitachi Asia Ltd.
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SAFETY 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.
CAUTION
RISK OF ELECTRIC
SHOCK DO NOT
OPEN
This symbol indicates “dangerous
voltage” inside the product that
presents a risk of electric shock or
personal injury.
DISPLAY MODES
Resolution
640 x 480
800 x 600
1024 x 768
Horizontal
Frequency (KHz)
31.47 (N)
37.88 (P)
48.36 (N)
TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.
15” Incoming display mode (input)
Vertical
Pixel Frequency
Frequency (Hz)
60.00 (N)
60.32 (P)
60.00 (N)
This symbol indicates
important instructions
accompanying the
product.
(MHz)
25.18
40.00
65.00
Comment
DOS
VESA
VESA
Resolution
640 x 480
800 x 600
Frequency (KHz)
31.47 (N)
37.88 (P)
* 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.
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Horizontal
20” Incoming display mode (input)
Vertical
Pixel Frequency
Frequency (Hz)
60.00 (N)
60.32 (P)
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(MHz)
25.18
40.00
Comment
DOS
VESA
SPECIFICATIONS
Model C15-LC880SNT C20-LC880SNT
Panel
Size
Display Size
Pixel Pitch
Viewing Angle (H/V)
Screen Tilt Angle
Frequency
Horizontal
Vertical
Contrast Ratio
Brightness
Display Color
Display Resolution Optimum Mode
Maximum Mode
Input Signal Sync.
Video Signal
RGB Signal
TV / Video Color System
Sound System
Video Format
Power Supply Input
Output (Adapter)
Power Consumption
Typical
Power Saving
15.1”
304.1(H) X 228.1(V)mm
0.297(H) X 0.297(V)mm
<140 / 125
408(H) X 306(V)mm
0.51(H) X 0.51(V)mm
<160 / 140
Front 5 / Rear 15
30 ~ 70KHz
50 ~ 75Hz
400:1
400 cd/m
16.2Million
1024 X 768 @ 70Hz
1024 X 768 @ 75Hz
2
500 cd/m
16.7Million
800 X 600 @ 70Hz
800 X 600 @ 75Hz
H/V Separate, TTL, P. or N.
H/V Composite, TTL, P. or N.
Sync-on-green 0.3 Vp-p, N.
1 Vp-p @ 75 ohm
0.7Vp-p @ 75 ohm
PAL / SECAM / NTSC
DK / I / BG / M
CVBS, S-VIDEO, Y/Pb/Pr
AC 100 - 240Vrms (50Hz / 60Hz)
DC 12V / 4.5A DC 12V / 5.2A
<54W
<3W
20.1”
2
<65W
<3W
Dimensions (WxHxD)
Weight
Environmental Considerations
Operating Temperature
390 X 401 X 188mm
5.3Kg
50 to 104 (10 to 40 )
Operatiing Humidity
Storage Temperature
13 to 113 (-25 to 45 )
Storage Humidity
Audio Characteristics
Audio Input
Frequency
Response
RCA Jack Red(R) White(L), 0.5 0.3Vrms
RF: 100Hz ~ 12KHz (at 3dB)
AV : 100Hz ~ 13KHz (at 3dB)
Note:
* Design and specifications are subject to change without notice.
* Weight and dimensions shown are approximate values only.
552 X 460 X 188mm
8.4Kg
10% to 80%
5% to 95%
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LOCATION OF CONTROL (Continued)
LOCATION OF CONTROL
Remote Control
1 2
10
13
15
16
17
3
5
7
4
6
8
9
11
12
14
16
15
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
12
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LOCATION OF CONTROL
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)
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LOCATION OF CONTROL
Front and Side Panels
For 15” model
1
2
3
4
5
6
7
For 20” model
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
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7
6
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
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1
2
3
4
5
CONNECTIONS
Connecting The Antenna
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.
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CONNECTIONS
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
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Note:
Do not pull the cables. When connecting and disconnecting the cables, do it with your hand holding
the connector.
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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.
’
VIDEO EQUIPMENT
To Audio
input (AV2)
VIDEO EQUIPMENT VIDEO EQUIPMENT
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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.
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VIDEO EQUIPMENT
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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 Backlight 50
NVRAM Addr
NVRAM Val
2 Color Setting Auto Adjust
Red 0
Green 0
Blue 0
Red Offset 0
Green Offset 0
Blue Offset 0
Min Volume 0
Max Volume 68
3 Sound Setting Dot1 X Pos 31
Dot1 Y Pos 69
Dot2 X Pos 62
Dot2 Y Pos 81
4 4200K 5000K Warm Brightness 128
Contrast 128
Red 247
Green 237
Blue 237
5 STANDARD Brightness 128
Contrast 128
Red 255
Green 255
Blue 255
6 COOL Brightness 128
Contrast 126
Red 224
Green 228
Blue 251
7 CUSTOM Brightness 128
Contrast 128
Red 255
Green 255
Blue 255
8 Advanced Setting Factory Mode 1
Power Mode 1
Panel Index 34
Decder SatHue 0
Enable Zoom 1
Enable SCART P
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
1 1
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TROUBLESHOOTING
TV DOES NOT TURN ON
Normal
1.Check MCU (U4)
2.Check CN3 (or
CN7) is connected
3.Check U8 has
VCC voltage
Is the power cord and
DC adapter plugged in?
Yes
LED lights up
Yes
Press Power button
LED light is green
Check inverter PWB unit Check MCU(U4)
Defective
1.Connect the line
of J9and inverter
2.Replace inverter
with a newone
LED light is red
Defective
Replace MCU with
a new one
No
No
Plug in
Check LED
Defective
Replace LED
with a new one
Normal
Replace DRIVE
PWB unit with
a new one
Normal
Defective
1.Replace MCU
with a newone.
2.Replace U8
with a newone.
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Check power input system
1.AC adapter
*Normal?
*Connected properly?
2.U9 has +5V?
3.U10 has 3.3V?
4.LED controls electrocircuit?
5.JD3 and JD2 are connected?
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SCHEMATIC DIAGRAMS
Main Diagram-1
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