LG LB504N-XL User manual

MENU
/AUTO
SOURCE/SELECT
COLOR MONITOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS NO. : CL-35
FACTORY MODEL: LB504N
MODEL: L1510P (LB504N-XL)

CONTENTS
SPECIFICATIONS
- 2 -
1. LCD CHARACTERISTICS
Type : TFT XGA LCD Module
Size : 352.0(H) x 263.5(V) x 14.0(T)
Pixel Pitch : 0.297mm x 0.297mm
Color Depth : 6Bits + FRC/ 16,194,277 colors
Active Video Area : 15.0 inch
(304.128 x 228.096)
Surface Treatment : Anti-Glare, Hard Coating (3H)
Backlight Unit : Top/Bottom edge side 2CCFL
Electrical Interface : LVDS
Interface
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio
≥ 10
Left : 55° min., 60° typ
Right : 55° min., 60° typ
Top : 40° min., 45° typ
Bottom : 40° min., 45° typ
2-2. Luminance : 200(min.), 250(typ.)
2-3. Contrast Ratio : 200(min.), 300(typ.)
3. SIGNAL (Refer to the Timing Chart)
3-1. Analog Video Input
1) Video Input Range : 0~0.7V ± 5%
2) Video Termination Impedance : 75Ω±5%
3) Sync Type : Separate TTL, Composite TTL
SOG(Sync On Green)
4) Sync Level : TTL Low ≤0.8V, High ≥2.0V
3-2. Digital Video Input
DDWG DVI Standard 1.0
3-3. Operating Frequency
Horizontal : 31 ~ 63kHz
Vertical : 56 ~ 75Hz
4. POWER SUPPLY
4-1. Power
100~240V, 50/60Hz 0.6A
4-2. Power Consumption
5. ENVIRONMENT
5-1. Operating Temperature: 10°C~35°C (50°F~95°F)
(Ambient)
5-2. Relative Humidity : 10%~80%
(Non-condensing)
5-3. MTBF : 40,000 Hours (Min.)
Lamp Life : 40,000 Hours (min.)
6. DIMENSIONS (with TILT/SWIVEL)
Width : 356mm (14.01'')
Depth : 229mm (9.01'')
Height : 380mm (14.96'')
Width : 356mm (14.01'')
Depth : 291.4mm (11.47'')
Height : 103.3mm (4.06'')
7. WEIGHT (with TILT/SWIVEL)
Net. Weight : 5.0kg (11.02 lbs)
Gross Weight : 6.6kg (14.55 lbs)
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 3
TIMING CHART ....................................................... 4
OPERATING INSTRUCTIONS ................................ 5
WIRING DIAGRAM ................................................. 8
BLOCK DIAGRAM ................................................... 9
DESCRIPTION OF BLOCK DIAGRAM................... 11
ADJUSTMENT ...................................................... 13
TROUBLESHOOTING GUIDE .............................. 14
PRINTED CIRCUIT BOARD................................... 18
EXPLODED VIEW...................................................21
REPLACEMENT PARTS LIST ...............................23
PIN CONFIGURATION............................................28
SCHEMATIC DIAGRAM......................................... 32
MODE
POWER ON (NORMAL)
STAND-BY
SUSPEND
DPMS OFF
POWER OFF
H/V SYNC
ON/ON
OFF/ON
ON/OFF
OFF/OFF
POWER CONSUMPTION
less than 30 W
less than 3 W
less than 3 W
less than 3 W
less than 3 W
LED COLOR
GREEN
AMBER
AMBER
AMBER
OFF
VIDEO
ACTIVE
OFF
OFF
OFF

- 3 -
WARNING FOR THE SAFETY-RELATED COMPONENT.
• There are some special components used in LCD
monitor that are important for safety. These parts are
marked on the schematic diagram and the
replacement parts list. It is essential that these critical
parts should be replaced with the manufacturer’s
specified parts to prevent electric shock, fire or other
hazard.
• Do not modify original design without obtaining written
permission from manufacturer or you will void the
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.)
WARNING
BE CAREFUL ELECTRIC SHOCK !
• If you want to replace with the new backlight (CCFL) or
inverter circuit, must disconnect the AC adapter
because high voltage appears at inverter circuit about
650Vrms.
• Handle with care wires or connectors of the inverter
circuit. If the wires are pressed cause short and may
burn or take fire.
PRECAUTION
CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.

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

OPERATING INSTRUCTIONS
- 5 -
FRONT VIEW REAR VIEW
Front Control Panel
1. Power Button
Use this button to turn the display on or off.
<Power (DPMS) Indicator>
This Indicator lights up green when the display
operates normally. If the display is in DPM (Energy
Saving) mode, this indicator color changes to
amber.
2. Menu Button
Use this button to enter or exit the On Screen
Display.
3. Button
Use these buttons to choose or adjust items in the
On Screen Display.
4. Button
Use these buttons to choose or adjust items in the
On Screen Display.
5.
SOURCE/SELECT Button
Use this button to enter a selection in the On
Screen Display.
When selecting input signal, press Source/Select
button before entering the OSD. This will change
input(DVI-I/D-SUB select button). The Default
setting is D-SUB.
MENU
/AUTO
SOURCE/SELECT
Power Connector
When adjusting your display
settings, always press the
button before entering the
On Screen Display(OSD). This
will automatically adjust your display image to the
ideal settings for the current screen resolution size
(display mode). The best display mode is 1024x768.
See front control panel
D-Sub Signal Connector
DVI-l Connector
Bring up Contrast and
Brightness adjustment.
100
100
PROCESSING
AUTO CONFIGURATION
1142 3

- 6 -
6. Control Lock(Menu button, button)
Press the hold the MENU button and button for
3 seconds: the message “CONTROLS LOCKED”
appears.
You can unlock the OSD controls at any time by
pushing the MENU, button for 3 seconds:
the message “CONTROLS UNLOCKED”will
appear.
CONTROLS LOCKED
CONTROLS UNLOCKED
Ergonomic
It is recommended that in order to maintain an ergonomic and comfortable viewing position, the forward tilt angle of the monitor should
not exceed 5 degrees.
Height Range : maximun 3.39inch (86.1mm)
Landscape & Portrait : You can rotate the panel 90o clockwise.
(* For detailed information, please refer to the Pivot Sofeware CD provided.)
※Adjust the position of the panel in various ways for maximum comfort.
Tilt Range : -24˚~145˚
145˚-24˚
* Make sure not to
touch the floor
when the head
rotates to use the
Pivot function.
Positioning your display

- 7 -
Making use of USB (Universal Serial Bus)*
USB (Universal Serial Bus) is an innovation in connecting your different desktop peripherals conveniently to your computer.
By using the USB, you will be able to connect your mouse, keyboard, and other to your monitor instead of having to
connect them to your computer. This will give you greater flexibility in setting up your system. USB allows you to connect
chain up to 120 devices on a single USB port, and you can “hot”plug (attach them while the computer is running) or unplug
them while maintaining Plug and Plug auto detection and configuration. This monitor has an integrated BUS-powered USB
hub, allowing up to 2 other USB devices to be attached it.
USB connection
1. Connect the upstream port of the Display to the downstream port of the USB compliant PC or another hub using the
USB cable. (Computer must have a USB port)
2. Connect the USB compliant peripherals to the downstream ports of the monitor.
NOTE
To activate the USB hub function, the monitor must be connected to a USB compliant PC(OS) or another hub with the USB
cable(enclosed).
When connecting the USB cable, check that the shape of the connector at the cable side matches the shape at the connecting
side.
Even if the monitor is in a power saving mode, USB compliant devices will function when they are connected the USB ports(both
the upstream and downstream) of the monitor.
IMPORTANT: These USB connectors are not designed for use with high-power USB devices such as a video camera, scanner, etc.
LGE recommends connecting high-power USB devices directly to the computer.
USB downstream Port
connect the cables from USB
compliant peripherals-such as
keyboard, mouse, etc
This is a simplified representation
of rear view.
To USB downstream port
of the USB compliant PC or
another hub cable

- 8 -
WIRING DIAGRAM
P902 J1
CN1
CN3
CN2
J702
J704
J705
J501
Connector Ass’y :
P/N: 6631T11012R
Connector Ass’y :
P/N: 6631T20008G
Connector Ass’y :
P/N: 6631T20015P
Connector Ass’y :
P/N: 6631T12002H
P902
CN1
CN2
J1
J702
J501
Connector the Control PCB Ass’y and Main PCB Ass’y.
Connector the Main PCB Ass’y and Inverter.

- 9 -
BLOCK DIAGRAM(MAIN)
Filter
BD
SMPS
Control
IC
TOP247
12V
5V
CON 5P
To main
D-Sub
DVI-I
R2/G2/B2
R1/G1/B1 R/G/B
Selection
(BA7657)
R/G/B ADC IC
(AD9884) Scaler IC
(MX88L250EC-X)
TMDS Receiver IC
(SIL141B)
Digital
Signal
LVDS IC
(THC63LVDM83R)
MICOM
( MTV312)
3.3 V
Regulator
2.5 V
Regulator
5 V
Regulator
12V 5VR
5V 3.3V
2.5V
3.3V 2.5V
RGB Data
3.3V
12V
Inverter
8Pin
MODULE
5VR
H/V Selection
Gate
H1
V1
H2
V2
H1/V1
H2/V2 H/V
3.3V
5VR

- 10 -
BLOCK DIAGRAM(SYSTEM)
AC Inlet
SMPS Trans
Power 5Pin
Regulator
44mm
135mm
Power PCB
Main PCB
Control IC
Heat
sink
Heat
sink
64mm
120mm
150mm
101mm
Power 5Pin
Inverter8Pin
Control
6pin
LCD Module
20 pin
D-Sub DVI-I
MICOM
Scaler
ADC
R/G/B
Selection
ADC
TMDS
Receiver

DESCRIPTION OF BLOCK DIAGRAM
- 11 -
1. Input signal switching part(BA7657).
There are two analog inputs which are analog and digital input.
They come from each 15 pin D-Sub and 24 pin DVI-I connector.
2. Video Controller Part.
This part amplifies the level of video signal for the digital conversion and converts from the analog video signal
to the digital video signal using a pixel clock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 25MHz to 80MHz.
This part consists of the Scaler, ADC and TMDS receiver .
The Scaler gets the video signal converted analog to digital, interpolates input to 1024 X 768 resolution signal
and outputs 8-bit R, G, B signal to transmitter.
3. Display Data Transmitter Part(LVDS).
This part transmit digital signal from the Scaler to the receiver of module.
4. Power Part.
This part consists of the one 5V, two 3.3V, and one 2.5V regulators to convert power which is provided 12V,
5V in Power board.
3.3V is provided for LCD panel and inverter, 5V is provided for micom and analog selection(BA7657).
Also, 5V is converted 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.
5. MICOM Part.
This part consists of EEPROM IC which stores control data, Reset IC and the Micom.
The Micom distinguishes polarity and frequency of the H/V sync are supplied from signal cable.
The controlled data of each modes is stored in EEPROM.
6. Inverter
The inverter converts from DC12V to AC 700Vrms and operate back-light lamp of module.

- 12 -
POWER BLOCK DIAGRAM
EMI
COMPONENTS
LINE
100 ~ 240V
INPUT RECTIFIER
AND FILTER
ENERGY
TRANSFER
OUTPUT RECTIFIER
AND FILTER
12V
5V
GND
SIGNAL
COLLENTION
PHOTO-COUPLER
ISOLATION
PWM CONTROL
CIRCUIT
HVDC 100KHz
PRIMARY SECONDARY
50 ~ 60Hz
1. EMI components.
This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR,
the circuit included a line-filter, across line capacitor and of course the primary protection fuse.
2. Input rectifier and filter.
This part function is for transfer the input AC voltage to a DC voltage through a bridge rectifier and a bulk
capacitor.
3. Energy Transfer.
This part function is transfer the primary energy to secondary through a power transformer.
4. Output rectifier and filter.
This part function is to make a pulse width modulation control and to provide the driver signal to power switch,
to adjust the duty cycle during different AC input and output loading condition to achive the dc output stablize,
and also the over power protection is also monitor by this part.
5. Photo-Coupler isolation.
This part function is to feed back the dc output changing status through a photo transistor to primary controller
to achive the stablized dc output voltage.
6. Signal collection.
This part function is to collect the any change from the dc output and feed back to the primary through photo
transistor
DESCRIPTION OF BLOCK DIAGRAM

- 13 -
ADJUSTMENT
All adjustment are thoroughly checked and corrected
when the monitor leaves the factory, but sometimes
several minor adjustment may be required.
Adjustment should be following procedure and after
warming up for a minimum of 10 minutes.
Alignment appliances and tools.
- IBM Compatible PC
- Programmable Signal Generator.
(eg. VG-819 made by Astrodesign Co.)
- E(E)PROM with each mode data saved.
- Alignment Adapter and Software.
1. Adjustment for Factory Preset Mode
1) Run alignment program for LB504N on the IBM
compatible PC.
2) Select EEPROM All Init. command and Enter.
3) Display cross hatch pattern at Mode 1.
4) Select EDID WRITE command and Enter.
2. Adjustment for White Balance
1) Display color 0,0 pattern at Mode 13.
2) Set External Bright to MAX position and Contrast to
MAX Position.
3) Select PRESET START →BIAS CAL command
and Enter.
4) No attempt to manually adjust, BIAS data is auto-
matically adjusted and saved to the EEPROM.
5) Display color 15,0 pattern at Mode 13.
6) Select DRIVE CAL command and Enter.
7) Color 1 (9300K) and Color 2 (6500K) are
automatically adjusted and saved to the EEPROM.
8) Select PRESET EXIT command and Enter.
Figure 1. Cable Connection
220
IBM
Compatible PC
PARALLEL PORT
Power inlet (required)
Power LED
ST Switch
Power Select Switch
(110V/220V)
Control Line
Not used
RS232C
PARALLEL
V-SYNC POWER
ST
VGS MONITOR
E
E
V-Sync On/Off Switch
(Switch must be ON.)
F
F
A
A
B
B
C
C
1510
5
569
1
1
1
14
13
25
6
5V
5V
5V
4.7K
4.7K
4.7K
74LS06
74LS06
OFF ON
OFF
ON
11
Video Signal
Generator

- 14 -
TROUBLESHOOTING GUIDE
1. NO POWER
CHECK U803.
CHECK
U502 PIN 8
VOLTAGE
(5V) ?
NO
NO POWER
(POWER INDICATOR OFF)
CHECK POWER
BOARD, AND FIND
OUT A SHORT POINT
AS OPENING
EACH POWER LINE
CHECK J704
VOLTAGE
PIN1&PIN2(12V)
PIN4(5V)?
NO
CHECK 5VS LINE
(OPEN CHECK)
CHECK
U806 Voltage
(5V) ?
NO
CHECK IIC LINE
CONNECTION
(U501, U502)
CHECK U201 VCC,
XTAL, RESET
IS U201 PIN16
VOLTAGE REPEATED
AS PULSE SHAPE ? NO
YES
YES
YES NO PROBLEM
NO
CHECK KEY CONTROL
CONNECTOR ROUTINE

- 15 -
2. NO RASTER (OSD IS NOT DISPLAYED) –INVERTER
CHECK MICOM INV
ON/OFF PORT.
J705 PIN8
5V? NO
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK POWER BOARD
J705 PIN1
12V? NO
1. CONFIRM BRIGHTNESS
OSD CONTRL STATE.
2. CHECK MICOM DIM-ADJ
PORT
J705 PIN7
5V? NO
REPLACE
INVERTER ASS’Y
CHECK
PULSE AS
CONTACTING SCOPE
PROBE TO CAUTION LABEL.
(CONTACT PROBE TO
CAUTION LABEL.
CAN YOU SEE PULSE
AT YOUR
SCOPE?
NO
REPLACE CCFL LAMP
IN THE LCD MODULE
YES
YES
YES
YES

- 16 -
CHECK U802
NO
1. CHECK PIN 93, 94
SOLDERING CONDITION
2. CHECK X201
3. TROUBLE IN U201
U804, U803, U802
POWER PINS
3.3V, 2.5V?
NO
CHECK U801 PIN 5, 2
U804, U803, U802
X201
OSCILLATE AS
14,3181M? NO
CHECK U201 OR U401
SOLDERING CONDITION AND
CHECK CONNECTION LINE
FROM U201 TO U201 or U401
NO
TROUBLE IN CABLE
OR LCD MODULE
J702’S PIN1
3.3V?
YES
YES
YES
YES
3. WHITE SCREEN (OSD IS NOT DISPLAYED)
WHITE SCREEN
(OSD IS NOT DISPLAYED)
U201
PIN 31 IS 65MHz CLOCK?
PIN 35 IS 48KHz H-SYNC?
PIN 36 IS 60Hz V-SYNC?
IS PULSE APPEARED
AT SIGNAL
PINS?
Input
1024x768@60Hz Signal.

- 17 -
CHECK U803
U201
POWER PIN
3.3V?
NO
1. CHECK PC
2. CHECK SIGNAL CABLE
D-SUB & DVI-I
CONNECTOR LINE
CHECK
R,G,B INPUT?
U102 PIN 7, 15, 22 NO
CHECK H-SYNC LINE
CHECK
H-SYNC INPUT
U102 PIN 40?
NO
YES
YES
YES
NO RASTER
(OSD IS DISPLAYED)
4. NO RASTER (OSD IS DISPLAYED) –MX88L295EC

PRINTED CIRCUIT BOARD
- 18 -
C805
R822
C811
C812
C209 C221
C210 C222
C211 C223
C212 C224
C218
C207 C219
C208 C220
C225
C226
C227
C228
L501
J501
1
R801
R403 R402
C810
L701
A
C403
C714 C715
RA206
C716
C148 C149
C181
C178
C717
1
R145
R103
R142 R143
C150 C151
C184 C187
C718
A
J702
C244C243
L203
C205 C217
C206
C201 C213
C202 C214
C203 C215
C204 C216
L202 L204
C229
L205
C110
R556
R557
L502
C111
L503
L504
R710
D713
L505
J701
R712
R713
R711
C405
C829
U801
4030
20
RA205
B
C153
C177
C176
C152
70
R205
R204
R101 R104
R144R102
C182
C183 C186
C185
605040
U201
E
R107 C132
R137 R134 R135 R136 C115
L101
R138 R133
R139
L102
L103
R708 R709
D712
D711
C404
C830
50
U401
10
R401
C402
RA204
RA203
X201
80
R203
C235
C234
C233
RA104
30
20
R106
C242
R108 R110 R112 R109 R111
RA105 RA106
20
C117
10
1
80
U101
R705
R704
R707
D709
D710
C828 R529 R525 R526 R534 R536
1
R532
C401
RA202
100
90
R206
C232 C230
C236
RA102
10
C241
C240
RA103
40
30
R141
C118
70
R741
R740
R132
D703 D704
C722
C721
C121 D708
D707
R706
D706
U804
R517
R572
R571
R570
R533
C514
R566 R567 C523
R565
R564
RA201
R202
R201
C231
C102
L201
110
C239
120
C238
D
1
R105 R114 R115
R119 R120
R117
R118
R116 C129 R113
C134
C135
RA101
R140
C175
U104
60
50
R129
C613
D701 D702
C113
C112
C114
D705
C801
C803
U802
C813
C814
R569
R530
R568C508
R511
R510
R562
R563
R521 RA107
RA108
100
90
C123 C122
RA109
80
C125
C124
RA110
C
70
RA111 RA112
R738
R739
R537 R543R542
R535
C720
C719
C131
L106
C133
Q504 Q502
C518
U505
R737
R736
C517 ZD705
ZD702
C802
C817
C815
R522
R524
R527 R528
R507 R509C507
C501
C503
110
C141
60
R147
C193
C194
C130
E
C108
C127 C128
U504
R531
C509
C
R539
C708
ZD703
ZD701
Q501
U803
C808 C807 C806
R803
R802
C809
R518
R515
R506C506
C139
C138
C126
C137
C140
L104
120
5040
C191
C189
C192
C190
C195
C106
C107
R721
R723
C120
R508
D715
D719
R538
C709
ZD704
MODEL:LB504N
P/N :6870T515A10
Q506
DATE :2002.05.24
Q4
U503
U805
R514
D501
C819
C505
C196
X501
C101
U102
1
10
30
20
L105
R146
R730
R731
C188
C706
U103
C105
R716
R720 R722
D718
C119
R719
R724
R541
ZD501
Q505
C713 R516
R540
R808R813
R551 R550
C816
U502
R512
R513
C818
R728
C522
R502
C831
C832
L805
R505
C502
C146
C144 C143
C145
U501
C142
B C147
R729 Q701
R733
R734
D
C104
C116
C109
R715
D717
R718
R726
R717
R714
C712
R812
R811
R810
R809
L703
R804
R806
R805
R807
U806
R735
C723
C711
C710
R520
R523
C504
C516
R559 R545
R544
R558
C515
C521
U701
R560 R561
C701
C804
C702 R504
R501
R503
C703 C704
U704
R702
Q703
R732 R701
C154 C707
Q101
R121
R727
C136
C103
D716
R725
D714
J705
L704 R519
C524
J704
L702
U703
U705
C705
U706
R703
J703
1. MAIN BOARD

- 19 -
P/N:6870T404U11
DATE:2001.11.14
C1
C2
C28
C27
U1
R40
L17
C31
R9
R1
R37C9
X1
C8
U2
R2
D1
C6 R25
L16
R8
R41
R19
C32
C18
R26
R31
R28 R30
R35 R34
L18
U3
C38
R21
L20
L13
L19
R22
C39
R32
L5 L4
ZD4
C43
C42
ZD1
C23
ZD12ZD11
C37
C24
R23
L14
ZD7
L15
C25
R24
J1
J5 J6
ZD8
3. USB BOARD
SW2
LED1
P/N:6870T436C11
MODEL:LB500J
DATA:2002.02.07
SW3SW6
SW4
R4
R6
SW7
R7
SW5
R5R3
R2R1
SW1
ZD2
ZD1
J1 1
2. CONTROL BOARD

- 20 -
4. POWER BOARD (Component Side)
5. POWER BOARD (Solder Side)