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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : CL-39
FACTORY MODEL: LM505F
MODEL: L1510T (LM505F-AL**T)
L1510A (LM505F-AL**A)
( ) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS
SPECIFICATIONS ................................................... 2 ADJUSTMENT ........................................................ 9
PRECAUTIONS ....................................................... 3 TROUBLESHOOTING GUIDE .............................. 10
TIMING CHART ....................................................... 4 PRINTED CIRCUIT BOARD................................... 15
OPERATING INSTRUCTIONS ................................ 5 EXPLODED VIEW...................................................18
WIRING DIAGRAM ................................................. 6 REPLACEMENT PARTS LIST ...............................20
BLOCK DIAGRAM ................................................... 7 PIN CONFIGURATION............................................27
DESCRIPTION OF BLOCK DIAGRAM.................... 8 SCHEMATIC DIAGRAM ........................................ 30



SPECIFICATIONS
1. LCD CHARACTERISTICS 4. POWER SUPPLY
Type : TFT XGA LCD Module
Size : 331.3(H) x 257.9(V) 4-1. Power
Pixel Pitch : 0.297mm x 0.297mm 100~240V, 50/60Hz 0.6A
Color Depth : 6Bits/ 16M colors
Active Video Area : 15.0 inch 4-2. Power Consumption
(304.128 x 228.096)
MODE H/V SYNC VIDEO POWER CONSUMPTION LED COLOR
Surface Treatment : Anti-Glare, Hard Coating
Backlight Unit : Top/Bottom edge side 2CCFL POWER ON (NORMAL) ON/ON ACTIVE less than 36 W GREEN

Electrical Interface : LVDS interface STAND-BY OFF/ON OFF less than 5 W AMBER

SUSPEND ON/OFF OFF less than 5 W AMBER
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio 10 DPMS OFF OFF/OFF OFF less than 5 W AMBER
Left : - 60 min.
Right : +60 min. 5. ENVIRONMENT
Top : +45 min. 5-1. Operating Temperature: 10C~35C (50F~95F)
Bottom : - 45 min. (Ambient)
2-2. Luminance : 250(min.), 300(typ.) 5-2. Relative Humidity : 10%~80%
(Non-condensing)
2-3. Contrast Ratio :250(min.), 350(typ.)
5-3. MTBF : 50,000 Hours (min.)
3. SIGNAL (Refer to the Timing Chart) Lamp Life : 40,000 Hours (min.)
3-1. Sync Signal
1) Type : Separate Sync. (Horizontal & Vertical) 6. DIMENSIONS (with TILT/SWIVEL)
2) Input Voltage Level : Low=0~0.8V, High=2.1~5.5V Width : 360.0mm (14.17'')
3) Sync Polarity : Positive or Negative Depth : 153.0mm (6.02'')
3-2. Video Input Signal Height : 359.8mm (14.16'')
1) Type : R, G, B Analog
2) Voltage Level : 0~0.714 V 7. WEIGHT (with TILT/SWIVEL)
a) Color 0, 0 : 0 Vp-p Net. Weight : 4.24kg (9.35 lbs)
b) Color 7, 0 : 0.467 Vp-p Gross Weight : 6.08kg (13.40 lbs)
c) Color 15, 0 : 0.714 Vp-p
3) Input Impedance : 75 8. Audio

3-3. Operating Frequency RMS Audio Output : 1W + 1W(R+L)
Horizontal : 31 ~ 63kHz Input Sensitivity : 0.7Vrms
Vertical : 56 ~ 75Hz Speaker Impedance : 8




-2-
PRECAUTION
WARNING FOR THE SAFETY-RELATED COMPONENT. WARNING
There are some special components used in LCD BE CAREFUL ELECTRIC SHOCK !
monitor that are important for safety. These parts are
If you want to replace with the new backlight (CCFL) or
marked on the schematic diagram and the
inverter circuit, must disconnect the AC adapter
replacement parts list. It is essential that these critical
because high voltage appears at inverter circuit about
parts should be replaced with the manufacturer's
650Vrms.
specified parts to prevent electric shock, fire or other
hazard.
Handle with care wires or connectors of the inverter
Do not modify original design without obtaining written circuit. If the wires are pressed cause short and may
permission from manufacturer or you will void the burn or take fire.
original parts and labor guarantee.


TAKE CARE DURING HANDLING THE LCD MODULE
WITH BACKLIGHT UNIT.
Must mount the module using mounting holes arranged
in four corners.
Do not press on the panel, edge of the frame strongly
or electric shock as this will result in damage to the
screen.
Do not scratch or press on the panel with any sharp
objects, such as pencil or pen as this may result in
damage to the panel.
Protect the module from the ESD as it may damage the
electronic circuit (C-MOS).
Make certain that treatment person's body are
grounded through wrist band.
Do not leave the module in high temperature and in
areas of high humidity for a long time.
The module not be exposed to the direct sunlight.
Avoid contact with water as it may a short circuit within
the module.
If the surface of panel become dirty, please wipe it off
with a softmaterial. (Cleaning with a dirty or rough cloth
may damage the panel.)

CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.




-3-
TIMING CHART

VIDEO
B A


E
C
F
D
SYNC




Sync Dot Total Video Blanking Sync Back Front
MODE H/V Frequency Period Active Time Duration Porch Porch Resolution
Polarity Clock (E) Time ( A ) (B) (D) (F) (C)
H (Pixels) + 25.175 31.468 KHz 800 640 160 96 48 16
1 640 x 350
V (Lines) 70.0 Hz 449 350 99 2 60 37
H (Pixels) 28.322 31.468 KHz 900 720 180 108 55 17
2 720 x 400
V (Lines) + 70.0 Hz 449 400 49 2 34 13 (TEXT)
H (Pixels) 25.175 31.469 KHz 800 640 160 96 48 16
3 640 x 480
V (Lines) 60.0 Hz 525 480 45 2 33 10
H (Pixels) 30.24 35.0 KHz 864 640 224 64 96 64
4 640 x 480
V (Lines) 66.67 Hz 525 480 45 3 39 3
H (Pixels) 31.5 37.861 KHz 832 640 192 40 128 24
5 640 x 480
V (Lines) 72.8 Hz 520 480 40 3 28 9
H (Pixels) 31.5 37.50 KHz 840 640 200 64 120 16
6 640 x 480
V (Lines) 75 Hz 500 480 20 3 16 1
H (Pixels) + 36.0 35.156KHz 1024 800 224 72 128 24
7 800 x 600
V (Lines) + 56.25 Hz 625 600 25 2 22 1
H (Pixels) + 40.0 37.879 KHz 1056 800 256 128 88 40
8 800 x 600
V (Lines) + 60.3 Hz 628 600 28 4 23 1
H (Pixels) + 50.0 48.077 KHz 1040 800 240 120 64 56
9 800 x 600
V (Lines) + 72.188 Hz 666 600 66 6 23 37
H (Pixels) + 49.5 46.875 KHz 1056 800 256 80 160 16
10 800 x 600
V (Lines) + 75.0 Hz 625 600 25 3 21 1
H (Pixels) 57.2832 49.725 KHz 1152 832 320 64 224 32
11 832 x 624
V (Lines) 74.55 Hz 667 624 43 3 39 1 (MAC)
H (Pixels) 65 48.363 KHz 1344 1024 320 136 160 24
12 1024 x 768
V (Lines) 60.0 Hz 806 768 38 6 29 3
H (Pixels) 75 56.476 KHz 1328 1024 304 136 144 24
13 1024 x 768
V (Lines) 70.0 Hz 806 768 38 6 29 3
H (Pixels) + 78.75 60.023 KHz 1312 1024 288 96 176 16
14 1024 x 768
V (Lines) + 75.0 Hz 800 768 32 3 28 1




-4-
OPERATING INSTRUCTIONS

FRONT VIEW REAR VIEW


HEAD PHONE
AUDIO IN
AUDIO[R]

AUDIO[L]

VIDEO
S-VIDEO




Power Connector
See front control panel


D-Sub Signal Connector




Front Control Panel

L1510A




6 5 2 3 4 1


L1510T




6 5 2 3 4 1


1. Power Button 3. Button
Use this button to turn the display on or off. Use these buttons to choose or adjust items in the
On Screen Display.
This Indicator lights up green when the display
operates normally. If the display is in DPM (Energy
Use these buttons to go up and down the channel
Saving) mode, this indicator color changes to
when TV source is a available.
amber.
2. Menu Button Volume:
37

Use this button to enter or exit the On Screen Use these buttons to decrease or increase the
Display. volume level.



-5-
OPERATING INSTRUCTIONS

Front Control Panel
4. AUTO/SELECT Button 5. SOURCE Selection
Use this button to enter a selection in the On
SOURCE AUTO/SELECT
Screen Display.
When adjusting your display settings, Use this button to select an
PROCESSING always press the AUTO/SELECT input signal.
A U T O C O N F I G U R AT I O N button before entering the On Screen PC (DSUB) : 15-pin D-sub analog signal
V1 (CVBS) : Composite video
Display(OSD). This will automatically
V2 (SVHS) : S video
adjust your display image to the ideal settings for the current
TV: TV
screen resolution size (display mode).
The best display mode is 1024x768. 6. Remote Control Sensor




WIRING DIAGRAM

Connector Ass'y P/No:
6631T11016C



Connector Ass'y P/No:
6631T20008G
Connector Ass'y P/N: 6631T20020M

Connector Ass'y P/No:
6631T20015V
J7
J10
J8
CN3 J1
P902 J4
CN1

CN2




-6-
Memory
SDRAM x 4
R/G/B
Rx2,Rx1
H/V AD-HS/VsyncM LCD Module
AD Converter Rx0,RxC
R/G/B 8bit R/G/B 8bit
MST9883-110 GND




15Pin D-Sub
DHS/DVS LVDS Tx
Digital Display Processor
DSCL To Micom (THC63L
2
(EMH2)
DSDA I_C(SDA/SCL) VDM83R) GND,VCC,VDD
DCLK/DEN
24LC02
+ 12v_INV
To Micom INV On/Off -CTL Inverter
IPP0/COM0 DIM-ADJ
IPP1/COM1
UV 8bit HS-VGA IPP2/COM2
Micom
Y 8bit VS-VGA (MTV230MS IPP3/COM3 INV_STAT1,2
(to: MICOM)
SCL/SDA
HS/VS

DSCL/DSDA KEY(0~7),RMT INV On/Off-CTL
SC/SY REMOTE Control Key B/D
Video LED-AMBER
LED-GREEN




-7-
S-VHS
Processor Teletext IPP0/COM0
(VPC32030) V-R/G/B IPP1/COM1 LVDS TX-CTL
(SDA55XX)
To Micom IPP2/COM2 ADC-CTL
SV
2 AUDIO- MUTE




V
HS/VS/ V-chip/Caption I_C(SCL/SDA) IPP3/COM3
VOUT MOD-CTL
(M37136) 24LC16B POWER-CTL
To Micom (KEY-CTL)
2 IPP0/COM0
BLOCK DIAGRAM




I_C(SDA/SCL)
CVBS IPP1/COM1
IPP2/COM2
IPP3/COM3 SP(L)




RV
To Micom Audio Power
Sound 2
I_C(SDA/SCL) Audio Mute Amplifier 12V 8V 5V 3.3V
Processor (To Micom) (TDA7268)




LV
(MSP3420 SP(R)
MSP3410 5VA
MSP3450) 8VA
POWER




PC
AMP-IN R/L SECTION
TV-SIF 5VA
5V 12V

SMPS
Multi Media TUNER 5V/SCL/SDA ( 90~ 240 V)




TV
(TAPC-701P)
CVBS/TV-SIF/TS0/TS1/TS2 EAR Phone
DESCRIPTION OF BLOCK DIAGRAM
1. Input Signal Part 8. Video processor part.
It is composed of three parts. This block is composed of VPC3230D (U16) and
-PC signal input part:15pin D-Sub and PC Audio input peripheral devices.
jack. MTV230M(U15) controls this IC through IIC Line.
-AV Video input part: RCA Jack(CVBS signal) This IC analyzes input signal of CVBS, Y/C and output
-TV signla input part: TV Tuner input Connector(TV analyzed signal (8bit interlace signal) to De-interlace
signal) block.
Analyzed signal has video control signals like Contrast,
2. A/D Converter Brightness, Sharpness, Color, tint signals Including
This block is composed of MST9883 (U5) and Adaptive Comb Filter.
peripheral devices.
MST9883 includes A/D converter, Pre-amp, and PLL. 9. Audio processor part.
The basic RGB signal (0.7Vp-p) is input to R,G,B pin of This block is composed of MSP3410G (U7) and
MST9883(U5). peripheral devices.
Input video signal is amplified, Phase locking , A/D MTV230M(U15) controls this IC through IIC Line.
converts to 8bits digital signal by this IC(U4) and send This IC analyzes Audio input signal through A/V Jack
the Digital video signal to EMH1(U9). and PC audio.
And output the analyzed signals to Audio Amplifier
3. Digital Display Processor (TDA7268).
It is composed of EMH1(U9).
It function that this IC(U9) converts desirable signal 10. Audio Amplifier
from AD Converter and Deinterlacer to operate LVDS This block is composed of TDA7268 (U22) and
part. peripheral devices.
It amplifies audio signal input from Audio Decoder and
4. Deinterlacer output amplified audio signal to Speaker,Audio Output
This block is composed of MX88L284FC(U19) and Jack.
peripheral devices.
MTV230M(U15) controls this IC through IIC Line. 11. Power part.
And this IC convert 8 Bit Interlace Y/UV signal to De- It functions that Input power 12V converts TV-5V,AV-
interlace signal. 5V,8VA and It functions that Input power 5V converts
It output converted signal to Format Converter. 2.5VD,2.5VA,3.3VS,3.3VD,3.3VA.

5. Panel-Link Circuit 12. Control.
LVDS Transmitter (THC63LVD273, U2) is the IC that It receives outer key input, transmits the input to
receives output digital signal of EMH1(U9) and output Micom(U15).
to LCD Module. There is key input part and remocon receiver.

6. Micom Controller 13. Teletext.
It is composed of MTV230MS(U15), its functions is It receives text information signal and displays text
controlling each IC, display mode and frequency information through Text receiver Decorder. It called
through EEPROM and IIC comunication. multi-text broadcast.

7. Inverter
It functions that Input Power 12V converts 480Vrms to
operate LCD lamp.




-8-
ADJUSTMENT
All adjustment are thoroughly checked and corrected
when the monitor leaves the factory, but sometimes 2. Adjustment for White Balance
several minor adjustment may be required. 1) Display color 0,0 pattern at Mode 13.
Adjustment should be following procedure and after 2) Set External Bright to MAX position and Contrast to
warming up for a minimum of 10 minutes. MAX Position.
Alignment appliances and tools. 3) Select PRESET START BIAS CAL command
and Enter.
- IBM Compatible PC
4) No attempt to manually adjust, BIAS data is auto-
- Programmable Signal Generator.
matically adjusted and saved to the EEPROM.
(eg. VG-819 made by Astrodesign Co.)
5) Display color 15,0 pattern at Mode 13.
- E(E)PROM with each mode data saved.
6) Select DRIVE CAL command and Enter.
- Alignment Adapter and Software.
7) Color 1 (9300K) and Color 2 (6500K) are
1. Adjustment for Factory Preset Mode automatically adjusted and saved to the EEPROM.
1) Run alignment program for LM505F on the IBM 8) Select PRESET END command and Enter.
compatible PC.
2) Select EEPROM All Init. command and Enter. 3. DDC Data Write Procedure
3) Display cross hatch pattern at Mode 1. 1) Use this procedure only when there is some
4) Select COMMAND PRESET START command. probelm on EDID data.
5) Select EDID WRITE command and Enter. 2) Select EDID Write EDID[A0] command and
6) Press "Y"key, it will automatically save all FOS data Enter.
to EEPROM. 3) This will write the EDID data to EEPROM.




A

IBM 9 6
Video Signal 5 1
Compatible PC 15 11
Generator 10 6
5 1
C
PARALLEL PORT
ed




13 1
us


C
t




25
No




14
2
23
RS




OFF ON
5V
EL
Control Line




F
LL




C
RA
PA




Power inlet (required) 5V
220
4.7K
Power Select Switch 4.7K
R




VG ON
WE




S 5V
(110V/220V)
PO




E 74LS06
A
T




MO Power LED
CS




NI OFF 4.7K
YN




TO
V-S




R
74LS06

E ST Switch
B
B
F V-Sync On/Off Switch
(Switch must be ON.)




Figure 1. Cable Connection

-9-
TROUBLESHOOTING GUIDE
1. NO POWER


NO POWER
(POWER INDICATOR OFF)




CHECK NO CHECK POWER
J1 VOLTAGE
(12V)? BOARD


YES



CHECK NO CHECK POWER
J1 VOLTAGE BOARD
(5V)?

YES



CHECK NO
CHECK X2
X2 12MHz?


YES




CHECK NO CHECK MICOM (U15)
J8 PULSE? ON/OFF PORT.


YES



CHECK KEY CONTROL
BOARD




- 10 -
2. NO RASTER (OSD IS NOT DISPLAYED)



NO RASTER
(OSD IS NOT DISPLAYED)




CHECK NO CHECK THE PERIPHERAL
U25? IC U25

YES


CHECK
AD9883(U5) NO
CHECK U10, U24
INPUT/OUTPUT
?
YES


CHECK
EMH1(U9) NO CHECK THE PERIPHERAL
INPUT/OUTPUT IC U9
?

YES


CHECK
LVDS(U2) NO CHECK THE PERIPHERAL
INPUT/OUTPUT IC U2
?

YES




CHECK SIGNAL INPUT
AND SIGNAL CABLE




- 11 -
3. NO RASTER ON VIDEO SIGNAL INPUT


NO RASTER ON VIDEO SIGNAL




POWER CHECK OF VPC3230(U16) : L2(3.3V) , L8(5V)
POWER CHECK OF MX88284(U19) : U35(3.3V)
POWER CHECK OF EMH1(U9) : U10 POWER
POWER CHECK OF LVDS(U2) : U10 POWER




CHECK CABLE OF
VCR,DVD


NO INPUT SIGNAL
CHECK VCR,DVD I/O SIGNAL
CHECK VPC3230(U16) I/O
SIGNAL
NO OUTPUT SIGNAL
CHECK THE PERIPHERAL IC
OF VPC3230(U16) )
NO INPUT SIGNAL
CHECK MX88284(U19) I/O
SIGNAL
NO OUTPUT SIGNAL
CHECK THE PERIPHERAL IC
OF MX88284(U19)
NO INPUT SIGNAL
CHECK EMH1(U9) I/O SIGNAL
NO OUTPUT SIGNAL CHECK THE PERIPHERAL IC
OF EMH1(U9)
NO INPUT SIGNAL
CHECK LVDS(U2) I/O SIGNAL
CHECK THE PERIPHERAL IC
NO INPUT SIGNAL OF LVDS(U2)




- 12 -
4. NO RASTER ON TV SIGNAL


NO RASTER ON TV SIGNAL




POWER CHECK OF VPC3230(U16) : L2(3.3V) , L8(5V)
POWER CHECK OF MX88284(U19) : U35(3.3V)
POWER CHECK OF EMH1(U9) : U10 POWER
POWER CHECK OF LVDS(U2) : U10 POWER




CHECK CONNECTION OF
TV TUNER AND ANTENNA




CHECK TV CH SELECT AUTO CH OF OSD



NO INPUT SIGNAL CHECK CONNECTION OF
TV TUNER AND ANTENNA
CHECK VPC3230(U16) I/O SIGNAL
NO OUTPUT SIGNAL
CHECK THE PERIPHERAL IC
OF VPC3230(U16)
NO INPUT SIGNAL

CHECK MX88284(U19) I/O SIGNAL
NO OUTPUT SIGNAL
CHECK THE PERIPHERAL IC
OF MX88284(U19)
NO INPUT SIGNAL
CHECK EMH1(U9) I/O SIGNAL
NO OUTPUT SIGNAL
CHECK THE PERIPHERAL IC
OF EMH1(U9)
NO INPUT SIGNAL
CHECK LVDS(U2) I/O SIGNAL
CHECK THE PERIPHERAL IC
NO INPUT SIGNAL OF LVDS(U2)




- 13 -
5. SOUND TROBLE SHOOTING


NO SOUND OUTPUT




POWER CHECK OF MSP3410G(U7) : L37,L23(5V),L26(8V)
POWER CHECK OF TDA7268(U22) : 12V
POWER CHECK OF MTV230M64(U15) : BA033T(U12) =>3.3V, FDC6326L(U25) =>5V




CHECK SOUND OF VCR,DVD,PC
(TV)CHECK CONNECTION OF TUNER
AND ANTENNA
CHECK SOUND INPUT
=>PC SOUND(J7)
=>VIDEO SOUND
NO INPUT SIGNAL (RDE,WHITE OF J702)
CHECK MSP3410G(U7) I/O SIGNAL CHECK THE PERIPHERAL IC

NO OUTPUT SIGNAL
CHECK THE PERIPHERAL IC
NO INPUT SIGNAL
OFMSP3410G(U7)
CHECK TDA7268(U22) I/O SIGNAL
CHECK THE PERIPHERAL IC
NO OUTPUT SIGNAL OF TDA7268(U22)



CONN CHECK CHECK CONNECTION OF
NO INPUT SIGNAL SPEAKER ON MONITOR




- 14 -
SOLDERING DIRECTION
R205 C237
J1



R203
U13 U20 U19 U21
50




L48




R216
50




U26
1
50




50




L47
1




1




1




C119
C66
C81
C25
J2




10




10




10




10
40




40




U10
40




40
1




C3



C2
R204
L17



C39
D10 D11 C40 J8
C236




R202
C90