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TFT-LCD MONITOR
ES15A*/ES17A*
SERVICE Manual
TFT-LCD MONITOR CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly & Reassembly
4. Alignment & Adjustments
5. Troubleshooting
6. Exploded View & Parts List
7. Electrical Parts List
8. Block Diagram
9. Wiring Diagram
10. Schematic Diagrams
11. Panel Description
1 Precautions
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as
electrical shock.
1-1 Safety Precautions
1-1-1 Warnings
1. For continued safety, do not attempt to modify the (READING SHOULD
circuit board. NOT BE ABOVE 0.5mA)
2. Disconnect the AC power and DC Power Jack
before servicing. DEVICE
LEAKAGE
CURRENT
UNDER TESTER
1-1-2 Servicing the LCD Monitor TEST
TEST ALL
EXPOSED METAL
1. When servicing the LCD Monitor Disconnect the SURFACES
AC line cord from the AC outlet.
2-WIRE CORD
2. It is essential that service technicians have an
accurate voltage meter available at all times. Check
the calibration of this meter periodically. ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED) EARTH
1-1-3 Fire and Shock Hazard GROUND
Before returning the monitor to the user, perform the Figure 1-1. Leakage Current Test Circuit
following safety checks:
1. Inspect each lead dress to make certain that the 4. With the unit completely reassembled, plug the AC
leads are not pinched or that hardware is not line cord directly into a 120V AC outlet. With the
lodged between the chassis and other metal parts in unit's AC switch first in the ON position and then
the monitor. OFF, measure the current between a known earth
2. Inspect all protective devices such as nonmetallic ground (metal water pipe, conduit, etc.) and all
control knobs, insulating materials, cabinet backs, exposed metal parts, including: metal cabinets,
adjustment and compartment covers or shields, screwheads and control shafts. The current
isolation resistor-capacitor networks, mechanical measured should not exceed 0.5 milliamp. Reverse
insulators, etc. the power-plug prongs in the AC outlet and repeat
3. Leakage Current Hot Check (Figure 1-1): the test.
WARNING: Do not use an isolation transformer during
this test. 1-1-4 Product Safety Notices
Use a leakage current tester or a metering system
Some electrical and mechanical parts have special
that complies with American National Standards
safety-related characteristics which are often not
Institute (ANSI C101.1, Leakage Current for evident from visual inspection. The protection they give
Appliances), and Underwriters Laboratories (UL may not be obtained by replacing them with
Publication UL1410, 59.7). components rated for higher voltage, wattage, etc. Parts
that have special safety characteristics are identified by
! on schematics and parts lists. A substitute
replacement that does not have the same safety
characteristics as the recommended replacement part
might create shock, fire and / or other hazards. Product
safety is under review continuously and new
instructions are issued whenever appropriate.
ES15A*/ES17A* 1-1
1 Precautions
1-2 Servicing Precautions
WARNING: An electrolytic capacitor installed with the wrong polarity might explode.
Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions
section of this manual.
Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the
safety precautions, always follow the safety precautions.
1-2-1 General Servicing Precautions
1. Always unplug the unit's AC power cord from the 4. Check the insulation between the blades of the AC
AC power source and disconnect the DC Power plug and accessible conductive parts (examples:
Jack before attempting to: metal panels, input terminals and earphone jacks).
(a) remove or reinstall any component or assembly, 5. Insulation Checking Procedure: Disconnect the
(b) disconnect PCB plugs or connectors, (c) connect power cord from the AC source and turn the power
a test component in parallel with an electrolytic switch ON. Connect an insulation resistance meter
capacitor. (500 V) to the blades of the AC plug.
2. Some components are raised above the printed The insulation resistance between each blade of the
circuit board for safety. An insulation tube or tape AC plug and accessible conductive parts (see
is sometimes used. The internal wiring is above) should be greater than 1 megohm.
sometimes clamped to prevent contact with
6. Always connect a test instrument's ground lead to
thermally hot components. Reinstall all such
the instrument chassis ground before connecting
elements to their original position.
the positive lead; always remove the instrument's
3. After servicing, always check that the screws, ground lead last.
components and wiring have been correctly
reinstalled. Make sure that the area around the
serviced part has not been damaged.
1-3 Electrostatically Sensitive Devices (ESD) Precautions
Some semiconductor (solid state) devices can be easily damaged by static electricity. Such components are commonly
called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-
effect transistors. The following techniques will reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor 6. Do not remove a replacement ESD from its
components or assemblies, drain the electrostatic protective package until you are ready to install it.
charge from your body by touching a known earth Most replacement ESDs are packaged with leads
ground. Alternatively, wear a discharging wrist- that are electrically shorted together by conductive
strap device. To avoid a shock hazard, be sure to foam, aluminum foil or other conductive materials.
remove the wrist strap before applying power to 7. Immediately before removing the protective
the monitor. material from the leads of a replacement ESD,
2. After removing an ESD-equipped assembly, place it touch the protective material to the chassis or
on a conductive surface such as aluminum foil to circuit assembly into which the device will be
prevent accumulation of an electrostatic charge. installed.
3. Do not use freon-propelled chemicals. These can Caution: Be sure no power is applied to the
generate electrical charges sufficient to damage chassis or circuit and observe all
ESDs. other safety precautions.
4. Use only a grounded-tip soldering iron to solder or
8. Minimize body motions when handling
desolder ESDs.
unpackaged replacement ESDs. Motions such as
5. Use only an anti-static solder removal device. Some brushing clothes together, or lifting your foot from
solder removal devices not classified as "anti-static" a carpeted floor can generate enough static
can generate electrical charges sufficient to damage electricity to damage an ESD.
ESDs.
1-2 ES15A*/ES17A*
2 Product Specifications
2-1 Specifications
Description
Item
ES15A* ES17A*
LCD Panel TFT-LCD panel, RGB vertical stripe, normaly TFT-LCD panel, RGB vertical stripe, normaly
white, 15-Inch viewable, 0.297 mm pixel pitch white, 17-Inch viewable, 0.264 mm pixel pitch
Scanning Frequency Horizontal : 30 kHz ~ 69 kHz (Automatic) 30 kHz ~ 81 kHz (Automatic)
Vertical : 56 Hz ~ 85 Hz (Automatic) 56 Hz ~ 76 Hz (Automatic)
Display Colors 16.7 Million colors
Maximum Resolution Horizontal : 1024 Pixels 1280 Pixels
Vertical : 768 Pixels 1024 Pixels
Input Video Signal Analog 0.7 Vp-p ± 5% positive at 75 , internally terminated
Input Sync Signal Type : Seperate H/V Sync-on-Green,
automatic synchronization without external switch of sync type
Level : TTL level
Maximum Pixel Clock rate 95 MHz 135 MHz
Active Display 304.1 mm / 228.1 mm 338.1 mm / 270.1 mm
Horizontal/Vertical
AC power voltage & Frequency AC 90 ~ 264 Volts, 60 / 50 Hz ± 3 Hz
Power Consumption 40 W (Max) 52 W (Max)
Dimensions
Unit (W x D x H) 18.6 x 15.6 x 8.0 Inches (474 x 397 x 204 mm) 20.8 x 17.6 x 8.0 Inches (529.2 x 447.7 x 204.4 mm)
Carton (W x D x H) 22.6 x 18.3 x 10.2 Inches (577 x 465 x 259 mm) 24.0 x 20.0 x 10.1 Inches (611 x 511 x 258 mm)
Weight 3.95 Kg (8.7 Ibs) 4.95 Kg (10.9 Ibs)
Environmental Considerations Operating Temperature : 50 °F ~ 104 °F (10 °C ~ 40 °C)
Humidity : 10 % ~ 80 %
Storage Temperature : -13 °F ~ 113 °F (-25 °C ~ 45 °C)
Humidity : 5 % ~ 95 %
Tunning Frequency Synthesize
TV System Color PAL, SECAM
Sound NICAM, A2 STEREO
Antena Input 75, Coaxial Cable
MAX Internal speaker Out : Right => 3W Right => 5W
Left => 3W Left => 5W
Sound Characteristic
BASS Control Range : -12dB~ + 12dB
TREBLE Control Range : -12dB~ + 12dB
Headphone Out: RF => 5mW max (400m Vrms)
A/V => 10mW max (580 Vrms), Max Input sound: -9dBm
Output Frequency (TBD) : RF => 80 Hz ~ 15 kHz
A/V => 80 Hz ~ 20 kHz
ES15A*/ES17A* 2-1
2 Product Specifications
2-2 Pin Assignments
Sync
Type Separate H/V Composite H/V Sync-on-green
Pin No.
1 Red Red Red
2 Green Green Green + H/V Sync.
3 Blue Blue Blue
4 GND GND GND
5 GND (DDC Return) GND (DDC Return) GND (DDC Return)
6 GND-Red GND-Red GND-Red
7 GND-Green GND-Green GND-Green
8 GND-Blue GND-Blue GND-Blue
9 No Connection No Connection Not Used
10 GND-Sync./Self Test GND-Sync./Self Test GND-Sync./Self Test
11 GND GND GND
12 DDC Data DDC Data DDC Data
13 Horizontal sync. H/V-Sync. Not Used
14 Vertical sync. Not Used Not Used
15 DDC Clock DDC Clock DDC Clock
Sync
Type DTV 15pin connector
Pin No.
1 Red , Y
2 Green , Pb
3 Blue , Pr
4 GND
5 GND
6 GND-Red
7 GND-Green
8 GND-Blue
9 GND
10 No Connection
11 GND
12 No Connection
13 Horizontal sync.
14 Vertical sync.
15 No Connection
2-2 ES15A*/ES17A*
2 Product Specifications
2-3 Timing Chart
This section of the service manual describes the timing that the computer industry recognizes as standard
for computer-generated video signals.
Table 2-1. Timing Chart
Mode IBM VESA
VGA2/ VGA3/
640/75 Hz 640/85 Hz 800/75 Hz 800/85 Hz 1024/60Hz 1024/75Hz 1024/85Hz 1280/76Hz 1280/75Hz
70 Hz 60 Hz
640 x 480 640 x 480 800 x 600 800 x 600 1024 x 768 1024 x 768 1024x768 1280x1024 1280x1024
Timing 720 x 400 640 x 480 (17" Only) (17" Only)
fH (kHz) 31.469 31.469 37.500 43.269 46.875 53.674 48.363 60.023 68.677 81.129 79.976
A µsec 31.777 31.778 26.667 23.111 21.333 18.631 20.677 16.660 14.561 16.640 12.504
B µsec 3.813 3.813 2.032 1.556 1.616 1.138 2.092 1.219 1.016 6.400 1.067
C µsec 1.589 1.589 3.810 2.222 3.232 2.702 2.462 2.235 2.201 2.880 1.837
D µsec 26.058 26.058 20.317 17.778 16.162 14.222 15.754 13.003 10.836 9.481
E µsec 0.318 0.318 0.508 1.556 0.323 0.569 0.369 0.203 0.508 3.200 0.119
fV (Hz) 70.087 59.940 75.000 85.008 75.000 85.061 60.004 75.029 84.997 76.106 75.025
O msec 14.268 16.683 13.333 11.764 13.333 11.756 16.666 13.328 11.765 10.660 13.329
P msec 0.064 0.064 0.080 0.671 0.064 0.056 0.124 0.050 0.044 0.080 0.038
Q msec 0.858 0.794 0.427 0.578 0.448 0.503 0.600 0.466 0.524 3.200 0.475
R msec 13.155 15.761 12.800 11.093 12.800 11.179 15.880 12.795 11.183 12.804
S msec 0.191 0.064 0.027 0.023 0.021 0.019 0.062 0.017 0.015 0.020 0.013
Clock
Freq. 28.322 25.175 31.500 49.500 49.500 56.250 75.000 78.750 94.500 135.000 135.000
(MHz)
Polarity
H.Sync Negative Negative Negative Negative Positive Positive Negative Positive Positive Negative Positive
V.Sync Positive Negative Negative Negative Positive Positive Negative Positive Positive Negative Positive
Remark Separate Separate Separate Separate Separate Separate Separate Separate Separate Com. Separate
Separate Sync H/V Composite Sync
VIDEO
A Q R S
Horizontal Vertical
Horizontal Vertical
Video
Video Video
Video P
B O
CC DD E E Q Q RR S S
Sync-on-Green
Sync
Sync Sync
Sync Vertical
Green
B
B PP
Horizontal
AA O O P Q R S
B O
A : Line time total B : Horizontal sync width O : Frame time total P : Vertical sync width
C : Back porch D : Active time Q : Back porch R : Active time
E : Front porch S : Front porch
ES15A*/ES17A* 2-3
2 Product Specifications
Memo
2-4 ES15A*/ES17A*
3 Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the
ES15A*/ES17A* monitor.
WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling
these components.
3-1 Disassembly
Cautions:1. Disconnect the monitor from the power source before disassembly.
2. Follow these directions carefully; never use metal instruments to pry apart the cabinet.
3-1 General Alignment Instuction 5. Connect the TV only to an DC power source
with voltage and frequency as specified on
1. Usually, a color TV-VCR needs only slight the backcover nameplate.
touch-up adjustment upon installation.
6. Do not attempt to connect or disconnect any
Check the basic characteristics such as height,
wire while the TV is turned on. Make sure
horizontal and vertical sync.
that the power cord is disconnected before
2. Use the specified test equipment or its replacing any parts.
equivalent.
7. To protect aganist shock hazard,use an
3. Correct impedance matching is essential. isolation transform.
4. Avoid overload. Excessive signal from a
sweep generator might overload the front-end
of the TV. When inserting signal markers,
do not allow the marker generator to distort
test result.
3-2 Replacement Order of Lamp Assemblies
1. After confirm there is nothing
on the desk
Turn the LCD module over
and put it on a flat desk set to
the ground.
ES15A*/ES17A* 3-1
3 Disassembly and Reassembly
2. Push down the stopper and
slide the lamp unit.
3. Please take out the lamp
units from the LCD module.
4. Please fix the new lamp
units on the LCD module :
opposite process 2 and 3
* Replacement of lamp unit should be done at the power off state and recommended clean bench
condition.
3-3 Reassembly
Reassembly procedures are in the reverse order of Disassembly procedures.
3-2 ES15A*/ES17A*
4 Alignments and Adjustments
4-1 General Alignment Instuction
1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation.
Check the basic characteristics such as height, horizontal and vertical sync.
2. Use the specified test equipment or its equivalent.
3. Correct impedance matching is essential.
4. Avoid overload. Excessive signal from a sweep generator might overload the front-end
of the TV. When inserting signal markers,do not allow the marker generator to distort
test result.
5. Connect the TV only to an DC power source with voltage and frequency as specified on
the backcover nameplate.
6. Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure
that the power cord is disconnected before replacing any parts.
7. To protect aganist shock hazard,use an isolation transform.
ES15A*/ES17A* 4-1
4 Alignments and Adjustments
Memo
4-2 ES15A*/ES17A*
5 Troubleshooting
5-1 No Power
Does proper DC 14 V appear at No
Check SMPS PCB and Adapter.
DC jack connected to CN801?
Yes
Does proper DC 5 V appear at No
Check IC803.
Pin 1 of IC803?
Yes
Does proper DC 14V appear at No
Check IC803.
Pin 2 of IC803?
Yes
Does proper DC 3.3 V appear at No
Check IC804.
Pin 1 of IC804?
Yes
Does proper DC 2.5 V appear at No
Check IC105.
Pin 4 of IC105?
Yes
Check IC908.
ES15A*/ES17A* 5-1
5 Troubleshooting
5-2 No Video (PC Signal)
Power indicator is green.
Yes
Does the signal appear No
at C106, C107, C108 Check CN100.
of R, G, B input?
Yes
Does the clock pulse No
Check X100 and related circuit of X100.
appear at X100?
Yes
Does the clock pulse appear at No
Check related circuit of IC102.
output of RA102 ~ RA107?
Yes
Does the clock pulse No
Check R401 and related circuit of R401.
appear at R401?
Yes
Does the clock pulse appear at No
Replace R605 ~ R604.
output of R605 ~ R614?
Yes
Replace LCD Panel.
5-2 ES15A*/ES17A*
5 Troubleshooting
5-3 No Picture (TV, Video, S-Video, Scart Video)
Check Pin 71, 72 (S-Video)
No Check the CN806 (Tuner) and the
and Pin 73 (VCR) and Pin 74
CN200 (Scart connector) and the
(Scart-Vin) and Pin 75 (RF-CVBS)
CN802 (VCR connector).
of IC201 (VPC3230D).
Yes
Does the signal appear at No Check the IC201 (VPC3230D)
RA200 ~RA203? and related circuit of IC201.
Yes
Does the signal appear at No Check the IC300 and
RA300 ~ RA303 of related
related circuit of IC300.
IC300 (FLI2200)?
Yes
Check the IC400 and R422 ~ R426.
ES15A*/ES17A* 5-3
5 Troubleshooting
5-4 No Sound
Does the signal appear at
Pin 67 (Tuner sound signal) and Check the CN803 (PC conector) and the
No
Pin 57, 56 (PC sound) and Pin 51, 50 CN802 (VCR connector) and the CN200
(VCR sound) and Pin 48, 47 (Scart (Scart connector and the CN806 (Tuner).
sound) of IC 700 (MSP3451)?
Yes
Does the signal appear at Pin 27, No Check the IC700 and
28 of IC700 (MSP3451)? related circuit of IC700.
Yes
Does the signal appear No Check the IC702 (Audio amp) and
at L702 ~L705? related circuit of IC702.
Yes
Replace the speaker.
5-4 ES15A*/ES17A*
6 Exploded View and Parts List
6-1 ES15A*
ES15A*/ES17A* 6-1
6 Exploded View & Parts List
6-2 ES17A*
6-2 ES15A*/ES17A*
15"LCD
Y/U/V
ES15A*/ES17A*
IRRCVR LVDS Deinterlacor
2 Scaler2 (FLI2200)
Micom (DS90C385)
(JAGASM)
VVS
8 Block Diagram
3X8
VVCLK
LVDS_EN, DHS,DVS
DCLK, DENG RGB VFIELD
VREF
HREF
HSYNC_PC
VSYNC_PC VCLK
VHS VVS
PC H-sync, V-sync RGB DATA VVCLK
VVS Y/U/V
Scaler1 VFIELD
(JAGASM)
CVBS,
osilator
V-sync,
H-sync
TTX IC Video Decoder
(SAA5264) (VPC3230)
SOG_CS
SOG_VS
Sync Sep TTX R/G/B SCART_OUT
(LM1881)
ANALOG S/W IC R/G/B,BLANK
3
RGB (BA7657)
Green
Head_phone OUT PC Video RF_CVBS
FROM TUNER
SCART R/G/B
Audio Amp (TDA7050T) TUNER
Audio IC SCART, Video,PC
(MSP3451) Sound 1F(Tuner) input
Audio Amp (TA1101B) V2 V1
(S-JACK) (VCR)
DVD, Camcoder input VCR input SCART CVBS RF
Speaker OUT
8-1
8 Block Diagrams
Memo
8-2 ES15A*/ES17A*
9-1
SPK OUT -R-
SPK OUT R+
SPK OUT L+
CHK_VIDEO
SPK OUT L-
AUDIO R IN
VCR CVB S
AUDIO L IN
MODE
KEY0
KEY1
KEY2
KEY3
KEY4
KEY5
KEY6
HP-R
HP-L
GND
GND
GND
CIN
YIN
NC
CN800
CN105
CN104
CN802
1~3 5V
4~6 NC
7,14,
GND
17,24
AUDIO OUT (R)
8 TX3+
AUDIO INPUT (R)
9 TX3-
AUDIO OUT (L)
10 TXCLK+
GND
11 TXCLK-
GND
12 TX2+
CN601
AUDIO INPUT (L)
13 TX2-
B
15 TX1+
7
ID
16 TX1-
GND
18 TX0+
NC
19 TX0-
G
20 TX3+
NC
21 TX3-
GND
22 TXCLK+
GND
23 TXCLK-
R
25 TX2+
RGB BL 16
26 TX2-
GND 17
27 TX1+
GND 18
28 TX1-
VIDEO OUT 19
29 TX0+
VIDEO INPUT 20
30 TX0-
GND 21
CN600
CN804
CN805
9 Wiring Diagram
ES15A*/ES17A*
LED_GRN
LED_RED
IRRCVR
GND
GND
5V
9 Schematic Diagrams
Memo
9-2 ES15A*/ES17A*
10 Schematic Diagrams
10-1 PC & JAG-1 Part Schematic Diagram
+3.3V_JAG IC120
???????????????? LP3961EMP-2.5
BLM41P600S
1 A
2 B
2 3
CREFCLK1
VIN VOUT
JTSRASn
JTSCKEn
JTSCASn
+2.5V_JAGA +2.5V
JTSDQM
JTSWEn
+3.3V_JAG
JTSCSn
JTSCLK
BD114
JTSBA0