LG FLATRON L1910P User manual

COLOR MONITOR
SERVICE MANUAL
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS NO. : CL-42
MODEL: L1910P (L1910PL-AF**R)
( ) **Same model for Service
*To apply the Mstar Chip.

1. LCD CHARACTERISTICS
Type : TFT Color LCD Module
Size : 19inch(48cm )diagonal
Pixel Pitch : 0.294(H) x 0.294(V)
Color Depth : 8-bit, 16,777,216 colors
Electrical Interface : LVDS
Surface Treatment : Anti-Glare, Hard Coating(3H)
Operating Mode : Normally Black
Backlight Unit : 4-CCFL (Cold Cathode
Fluorescent Lamp)
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio
≥
10
Left : -80° min., -85°(Typ)
Right : +80° min., +85°(Typ)
Top : +80° min., +85°(Typ)
Bottom : -80° min., -85°(Typ)
2-2. Luminance : 240(min), 300(Typ)
2-3. Contrast Ratio : 400(min), 700(Typ)
3. SIGNAL (Refer to the Timing Chart)
3-1. Sync Signal
• Type : Separate, Composite,
SOG (Sync On Green)
Digital
3-2. Video Input Signal
1) Type : R, G, B Analog
2) Voltage Level : 0~0.7 V
a) Color 0, 0 : 0 Vp-p
b) Color 7, 0 : 0.35 Vp-p
c) Color 15, 0 : 0.7 Vp-p
3) Input Impedance : 75 Ω
3-3. Operating Frequency
Horizontal(Analog) : 30 ~ 83kHz
Horizontal(Digital) : 30 ~ 71kHz
Vertical : 56 ~ 75Hz
4. MAX. RESOLUTION
D-sub Analog : 1280 x 1024@75Hz
DVI Digital/Analog : 1280 x 1024@60Hz
5. POWER SUPPLY
5-1. Power Adaptor(Built-in Power)
Input : AC 100-240V~, 50/60Hz , 1.0A
5-2. Power Consumption
6. ENVIRONMENT
6-1. Operating Temperature: 10°C~35°C (50°F~95°F)
(Ambient)
6-2. Relative Humidity : 10%~80%
(Non-condensing)
6-3. MTBF : 50,000 Hours
Lamp Life : 30,000 Hours(Typ)
7. DIMENSIONS (with TILT/SWIVEL)
Width : 413 mm (16.25'')
Depth : 223 mm (8.78'')
Height : 435mm (17.13'')
8. WEIGHT (with TILT/SWIVEL)
Net. Weight : 7.20kg (15.87 lbs)
Gross Weight : 9.83kg (21.67 lbs)
9. USB
Upstream : 1 port, Downstream : 2 port
Speed : Full-12Mbps, Low-1.5Mbps
CONTENTS
SPECIFICATIONS
- 2 -
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 4
TIMING CHART ....................................................... 5
OPERATING INSTRUCTIONS ................................ 6
WIRING DIAGRAM ................................................. 9
BLOCK DIAGRAM ..................................................10
DESCRIPTION OF BLOCK DIAGRAM...................11
ADJUSTMENT ...................................................... 13
TROUBLESHOOTING GUIDE .............................. 14
PRINTED CIRCUIT BOARD................................... 18
EXPLODED VIEW...................................................21
REPLACEMENT PARTS LIST ...............................23
PIN CONFIGURATION............................................27
SCHEMATIC DIAGRAM......................................... 28
MODE
POWER ON (NORMAL)
STAND-BY
SUSPEND
DPM OFF
H/V SYNC
ON/ON
OFF/ON
ON/OFF
OFF/OFF
POWER CONSUMPTION
less than 43 W
less than 3 W
less than 3 W
less than 3 W
LED COLOR
GREEN
AMBER
AMBER
AMBER
VIDEO
ACTIVE
OFF
OFF
OFF

- 3 -
Signal Connector Pin Assignment
Pin Signal (DVI-I)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
T. M. D. S. Data2-
T. M. D. S. Data2+
T. M. D. S. Data2/4 Shield
T. M. D. S. Data4-
T. M. D. S. Data4+
DDC Clock
DDC Data
Analog Vertical Sync.
T. M. D. S. Data1-
T. M. D. S. Data1+
T. M. D. S. Data1/3 Shield
T. M. D. S. Data3-
T. M. D. S. Data3+
+5V Power
Ground
(return for +5V,
H. Sync. and V. Sync.)
Pin Signal (DVI-I)
18
9
17 24
16 C1
C4
C3
C2
C5
16
17
18
19
20
21
22
23
24
C1
C2
C3
C4
C5
Hot Plug Detect
T. M. D. S. Data0-
T. M. D. S. Data0+
T. M. D. S. Data0/5 Shield
T. M. D. S. Data5-
T. M. D. S. Data5+
T. M. D. S. Clock Shield
T. M. D. S. Clock+
T. M. D. S. Clock-
Analog Red
Analog Green
Analog Blue
Analog H. Sync.
Analog Ground
T. M. D. S. (Transition Minimized Differential Signaling)
• DVI-I Connector (Digital/Analog)

- 4 -
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
- 5 -
VIDEO
SYNC
B
D
CFE
A
<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>
H + 31.469 800 640 16 96 48
V–70.8 449 350 37 2 60
H + 37.879 1056 800 40 128 88
V + 60.317 628 600 1 4 23
H–31.469 800 640 16 96 48
V–59.94 525 480 10 2 33
H–37.5 840 640 16 64 120
V–75 500 480 1 3 16
H–31.468 900 720 18 108 54
V + 70.09 449 400 12 2 35
H + 46.875 1056 800 16 80 160
V + 75.0 625 600 1 3 21
H+/–49.725 1152 832 32 64 224
V+/–74.55 667 624 1 3 39
H–48.363 1344 1024 24 136 160
V–60.0 806 768 3 6 29
H–60.123 1312 1024 16 96 176
V–75.029 800 768 1 3 28
H+/–68.681 1456 1152 32 128 144
V+/–75.062 915 870 3 3 39
H+/–61.805 1504 1152 18 134 200
V+/–65.96 937 900 2 4 31
H + 63.981 1688 1280 48 112 248
V + 60.02 1066 1024 1 3 38
H + 79.976 1688 1280 16 144 248
V + 75.035 1066 1024 1 3 38
Mode H/V
Sort
1
2
3
4
5
6
7
8
9
10
11
12
13
25.175
28.321
25.175
31.5
40.0
49.5
57.283
65.0
78.75
100.0
92.978
108.0
135.0
640x350
70Hz
800x600
60Hz
640x480
60Hz
640x480
75Hz
720x400
70Hz
800x600
75Hz
832x624
75Hz
1024x768
60Hz
1024x768
75Hz
1152x900
75Hz
1152x900
65Hz
1280x1024
60Hz
1280x1024
75Hz
Sync
Polarity Frequency
Dot
Clock Total Period
(E)
Video Active Time
(A)
Sync Duration
(D)
Back Porch
(F)
Front Porch
(C)
Resolution

- 6 -
FRONT VIEW
Front Control Panel
REAR VIEW
OPERATING INSTRUCTIONS
Front Control Panel Power Connect
Stand
Lock
USB Port
2
LightView
14 36 5
1. Power ON/OFF Button
Use this button to turn the monitor on or off.
2. Power Indicator
This indicator lights up green when the monitor
operates normally. If the display is in DPM(Energy
Saving)mode, this indicator color change to amber.
3.
▼▲◀▶ Button
Use these buttons to choose or adjust items in the On Screen
Display.
4. MENU Button
Use this button to enter or exit the On Screen Display.
5.AUTO/SELECT Button
Use this button to enter a selection in the On Screen Display.
When adjusting your display settings,
always press the AUTO/SELECT 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
1280x1024/60Hz.
6. SOURCE Button
Use this button to make Dsub or DVI connector active.
This feature is used when two computers are connected to the
monitor. The default setting is Dsub.
DVI Connect
D-Sub Signal
Connect
This function optimizes the brightness, contrast or
color value to the surrounding conditions and settings
and enables you to enjoy the most suitable picture by
adjusting the surroundings (DAY/NIGHT/USER
MODE).
• TEXT: For viewing letters
• MOVIE: For viewing movies
• PHOTO: For viewing pictures or the photographs
• USER MODE: This function memorizes the
manual adjustment -Brightness, Contrast and
Color value on the On Screen Display.
100
100
Bring up Contrast and Brightness adjustment.
:

- 7 -
This function allows you to secure the current control settings, so that they cannot be inadvertently
changed. Press and 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 and button for 3 seconds:
the message “CONTROLS UNLOCKED”will appear.
CONTROLS LOCKED/UNLOCKED
:
MENU and
Before setting up the monitor, ensure that the power to the monitor, the computer system, and other
attached devices is turned off.
Positioning your display
1.Adjust the position of the panel in various ways for maximum comfort.
Tilt Range : -5˚~30˚
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 3.15 inch (80.0mm)
Landscape & Portrait : You can rotate the panel 90o clockwise.
(* For detailed information, please refer to the Pivot Sofeware CD provided.)
* Make sure not to touch the
floor when the head rotates
to use the Pivot function.
80.0mm
Unfasten the [Stand lock]
clockwise to adjust the
height of the stand.

- 8 -
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 Play 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.
PUSH
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
USB upstream Port

J702
J706
J705
CN002
CN103CN102
CN104CN105
- 9 -
WIRING DIAGRAM
Connector Ass’y P/N: 6631T20023E
Connector Ass’y P/N:
6631T11012W
Connector Ass’y P/N:
6631T20022E

- 10 -
D-SUB
MST9151
including
(ADC/LVDS/SCALER
/INPUT SWITCHING
/TMDS )
MTV312
Micom
LCD Module
R,G,B differential
LVDS (Low Voltage Differential Signaling)
5
12V V
DVI-I
R,G,B, H/V Sync Digital Signal or
Analog R,G,B,H/V
3.3V
Reg. 2.5V
Reg.
5V 5V
Power
5V
AC Input
Inverter Output
Inverter
12V
U/S D/S
USB
HUB D/S
Bus-power USB
3.3V 2.5V
3.3V 2.5V
BLOCK DIAGRAM

- 11 -
DESCRIPTION OF BLOCK DIAGRAM
1. Video Controller Part & Display Data Transmitter Part.(MST9151)
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 135MHz.
This part consists of the Scaler.
The Scaler gets the video signal converted analog to digital,
interpolates input to 1280 x 1024 resolution signal and outputs 8-bit R, G, B signal to transmitter.
Especially pre-amp / ADC / Video controller/ Transmitter are merged to one chip"MST9151" by MSTAR.
This part transmit digital signal from the Scaler to the receiver of module.
2. 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.
3. Power Part
This part consists of the one 3.3V and one 2.5 regulators to convert power which is provided 5V in LIPS Board.
5V is provided for LCD Panel.
Also, 5V is converted 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.
4. Inverter
The inverter converts from DC12V to AC 700Vrms and operates back-light lamps of module.

- 12 -
EMI
COMPONENTS
LINE
100 ~ 240V
INPUT RECTIFIER
AND FILTER ENERGY TRANSFER OUTPUT RECTIFIER AND FILTER
12V
5V
GND
SIGNAL
COLLECT-
ON
PHOTO
INVERTER CIRCUIT High Voltage output
12V
-COUPLER
ISOLATION
PWM CONTROL
CIRCUIT
HVDC 100KHz
PRIMARY SECONDARY
50 ~ 60Hz
Operation description_LIPS
LIPS Board Block Diagram
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
achieve the stabilized 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.
7. Inverter
The inverter converts from DC12V to AC 700V and operate back-light lamp of module.

- 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.
1. Adjustment process for LCD MONITOR
1) Display half window pattern(or mixed white and black pattern)at Mode 8 (1024x768@60Hz).
2) Press the POWER and MENU key at the same time to light monitor, then go to adjustment mode.
3) Press the MENU s/w, next press UP button, you will see adjustment OSD menu.
4) Press the AUTO/SELECT to select the adjustment item first(use the same button to exit)next do the operation to
the relative item.Ex) 17HYDIS is used at 17AU, press right button to select. Press the AUTO/SELECT then
selected proper Module.
5) Press down button to move the place of ADC CAL. Press the AUTO/SELECT to select, right button is pressed for
adjustment.
6) When adjustment is finished, press the POWER key twice to light monitor again. The adjustment ends.
2. Adjustment for EDID
1) Use this procedure only when there is some probelm on EDID data.
2) Connect the D-sub cable.
3) Select EDID →Write EDID[A0] command and Enter.
220
IBM
Compatible PC
Video Signal
Generator
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
Figure 1. Cable Connection

- 14 -
TROUBLESHOOTING GUIDE
1. NO POWER
CHECK U803.
CHECK
U803 PIN 3
VOLTAGE
(5V) ?
NO
NO POWER
(POWER INDICATOR OFF)
CHECK POWER
BOARD, AND FIND
OUT A SHORT POINT
AS OPENING
EACH POWER LINE
CHECK J709
VOLTAGE
PIN5, PIN6 (5V)?
NO
CHECK 5VS LINE
(OPEN CHECK)
CHECK
U804 PIN 3 Voltage
(5V) ?
NO
CHECK IIC LINE
CONNECTION
(U501, U502)
CHECK U201 VCC,
XTAL, RESET
IS U201
PIN114 (3.3V)
VOLTAGE REPEATED
AS PULSE
SHAPE ?
NO
YES
YES
YES NO PROBLEM
YES
CHECK KEY CONTROL
CONNECTOR ROUTINE

- 15 -
2. NO RASTER (OSD IS NOT DISPLAYED) –LIPS
CHECK MICOM INV
ON/OFF PORT.
J705 PIN9
5V? NO
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK LIPS
J705
PIN5, PIN 6
5V?
NO
1. CONFIRM BRIGHTNESS
OSD CONTRL STATE.
2. CHECK MICOM DIM-ADJ
PORT
J705 PIN7
5V? NO
LIPS
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 -
1. CHECK PIN122, 123
SOLDERING CONDITION
2. CHECK X501
3. TROUBLE IN U201
U201
POWER PINS
3.3V/2.5V?
NO CHECK U804, U803
U201
PIN122, 123
OSCILLATE AS
12MHZ?
CHECK CONNECTION LINE
FROM U201 TO U501
TROUBLE IN CABLE
OR LCD MODULE
YES
YES
YES
3. NO RASTER (OSD IS NOT DISPLAYED) –MST9151
NO RASTER
(OSD IS NOT DISPLAYED)
U501
PIN41 IS 64KHz H-SYNC?
PIN42 IS 60Hz V-SYNC?
IS PULSE APPEARED
AT SIGNAL PINS?
NO
NO

- 17 -
4. TROUBLE IN DPM
TROUBLE IN DPM
TROUBLE IN PC
CHECK PC
PC IS NOT GOING
INTO DPM OFF MODE
NO
TROUBLE IN
X501
NO
TROUBLE IN
SIGNAL CABLE
NO
YES
YES
YES
CHECK
U501 PIN 11, 12
WAVEFORM
(12MHz) ?
CHECK
R734, R741
(SYNC) ?
CHECK
U501 PIN 24
(0V) ?

PRINTED CIRCUIT BOARD
- 18 -
1. MAIN BOARD (Component Side)
R711
R710
R533
R534
R537
C516
J708
C
1
J706
Q507
R552
R559
Q508
R553 R555
C508
C
R766
R554
R556
C509
Q704
R708R528R529
R580R581
R570R571
R747
R748
R560R562
R709
C711
C710
C708 C709
R532
U502
J702
1
R550
C550
C514
R530 R531
R513
R539
R557
D719 R763
R764 R765
R762
U703
R739
C501
Q503
Q502
R535
R542
5
Q703
R744
R745
C530
40
Q509
R558
R561
ZD710
C507
R726
R727
U503
R718
R724
C712
R723
U702
R536
C512 C513
X501
C503
15
10
35
U501
D707
ZD703
R722
R725C703
J703
MODEL:L1910
Q506 R510
P/N :6870T663A11 DATE :2003.05.19
R501
R502
R504
C502
20 25
30
R716
R741
R705
R520
C730
C736
ZD701 ZD704
ZD711
1
R511
Q504 R509
R515
R525
R591
R592
R590
R595
R596
C223 R538
R593
R540
R522
R583
R524 R523
R218
R219
R582
C208
C505 C506
R734
R733 R740
C731
Q702
R717
R707
ZD702
C707
C822
A
R551
C204
C205
C206
C232
C240
C231
C820
Q505
R201
R202
R203
R208
R209
R240
R541
C220
70
C224
C218
60
5040
C207
C209
C210
C215
Q701
C743 C744
D702
R701 R703
R812
C821
U802
C233
C247
C250
C246
C249
C248
C245
C244
C804 C803
R210
R214
R215
R211
R213
R216
R217
R212
C222
C227
80
C216
30
20
C741 C742
D701D706D718
R758
R706
R811
C740
C217
C221
100
90
A
R207
10
C714
C734 C735
D716
D717
R761 R759
ZD706
1
J709
R852
J705
R753
C818
C819
C230
C226 C219
110
C225
C229
C228
C214
R729
R204
R205
1
U201
Q706
R767
R730
ZD709
C713
R731
ZD705
R851
R853
R854
R855
C727
1
Q705
R751
C817
R728
C716
C831
X201
Q707 R768
C739
B
D715
R735
R813
C809
C810
R750
R850
R803
C760
C832
C801
C715
R769
R770
R771
C737 C738
D708
D709
D711
D714
R814
R841
R840 R843
R844
R845R849
C732
U805 C828
C829
C802 R772
R773
R774
C733
B
D710D712
D713
J701
R842
R846R847
R848
1
J707
U804 U803
R755
R732
R754
C704
C705 R756
R757
ZD708
ZD707
C706

- 19 -
2. POWER B OARD (Component Side)
3. POWER B OARD (Solder Side)

- 20 -
4.USB BOARD
P/N:6870T404U11
Model:LB886F USB
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
5. CONTROL BOARD
SW8
POWER
A
G
LED1
SW7
SET/AUTO
R3
RIGHT
SW5 SW6
R5
LEFT
R4
R7
R6 R8
SW4
UP
SW3
DOWNMENU
SW2SW1
INPUT
C2
C1
R1 R2
J1