Sharp LC-20VM2E User manual

1
LC-20VM2E
LC-121M2E
LC-150M2E
SX9S3LC20VM2E
SERVICE MANUAL
LC-20VM2E
SHARP CORPORATION
LCD AV MONITOR
The component parts of this model are partially different
depending on their suffix symbols. Before servicing the
units, be sure to check the suffix symbol on the model
label that is applied on the bottom side of the unit.
Suffix symbol ( , K , X )
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
originalconditionandonlypartsidenticaltothosespecified
be used.
CONTENTS Page
1. IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................... 2
2. SPECIFICATIONS ................................................................................................................................... 3
3. PART NAMES.......................................................................................................................................... 4
4. OUTLINE DIMENSION FIGURE .............................................................................................................. 5
5. REMOVING THE MAIN PARTS............................................................................................................... 6
6. LC-20VM2 ADJUSTING METHOD .......................................................................................................... 8
7. INTEGRATED CIRCUIT TERMINAL ARRANGEMENTS ........................................................................20
8. TROUBLE SHOOTING ............................................................................................................................ 29
9. CHASSIS LAYOUT .................................................................................................................................. 32
10. SCHEMATIC DIAGRAMS ........................................................................................................................ 36
11. BLOCK DIAGRAM ................................................................................................................................... 52
12. PRINTED WIRING BOARD ASSEMBLIES .............................................................................................. 54
13. PARTS LIST............................................................................................................................................. 63
14. PACKING OF THE SET ........................................................................................................................... 78
LC-20VM2EMODEL
SERVICE MANUAL LCD AV MONITOR MODEL LC-20VM2E

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LC-20VM2E LC-121M2E
LC-150M2E
1. IMPORTANT SERVICE SAFETY PRECAUTION
æ Service work should be perfomed only by qualified service technicians who are
thoroughly familiar with all safety checks and servicing guidelines which follow:
WARNING
1. For continued safety, no modification of any
circuit should be attempted.
2. Disconnect AC power before servicing.
CAUTION
FOR CONTINUED PROTECTION
AGAINST A RISK OF FIRE REPLACE
ONLY WITH SAME TYPE FUSE. F702 (2A,
250V), F703 (2.5A, 250V), F7751 (5A, 250V)
FUSE.
BEFORE RETURNING THE MONITOR
(Fire & Shock Hazard)
Before returning the monitor to the user,
perform the following safety checks:
1. Inspect all lead dress to make certain that leads
are not pinched, and check that hardware is not
lodged between the chassis and other metal
parts in the monitor.
2. Inspect all protective devices such as non-me-
talliccontrolknobs,insulationmaterials,cabinet
backs, adjustment and compartment covers or
shields, isolation resistor-capacitor networks,
mechanical insulators, etc.
3. Tobesurethatnoshockhazardexists,checkfor
current in the following manner.
• PlugtheACAdaptordirectly intoa100~240volt
AC outlet, and connect the DC power cable into
the monitor's DC jack. (Do not use an isolation
transformer for this test).
• Using two clip leads, connect a 1.5k ohm, 10
watt resistor paralleled by a 0.15µF capacitor in
series with all exposed metal cabinet parts and
aknownearthground,suchaselectricalconduit
orelectricalgroundconnectedtoanearthground.
• Use an AC voltmeter having with 5000 ohm per
volt, or higher, sensitivity or measure the AC
voltage drop across the resisor.
• Connect the resistor connection to all exposed
metal parts having a return path to the chassis
(antenna, metal cabinet, screw heads, knobs
andcontrol shafts, escutcheon, etc.)and meas-
ure the AC voltage drop across the resistor.
All checks must be repeated with the AC Adap-
tor plug connection reversed.(If necessary, a
nonpolarizedadaptorplugmustbeusedonlyfor
the purpose of completing these checks.)
A V
Any reading of 0.3V RMS(this corresponds
to 0.2 milliamp. AC.) or more is excessive and
indicates a potential shock hazard which must
be corrected before returning the monitor to
the owner.
SAFETY NOTICE
Many electrical and mechanical parts in LCD monitor
have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be nec-
essarily increased by using replacement components
rated for higher voltage, wattage, etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components having such features are identified by
“å”and shaded areasinthe ReplacementPartsLists
and Schematic Diagrams .
For continued protection, replacement parts must be
identical to those used in the original circuit.
The use of a substitute replacement parts which do not
have the same safety characteristics as the factory
recommended replacement parts shown in this service
manual, may create shock. fire. or other hazards.
TO EXPOSED
METAL PARTS CONNECT TO
KNOWN EARTH
GROUND
DVM
AC SCALE
1.5k ohms.
10W
0.15 µF
TEST PROBE

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LC-20VM2E
LC-121M2E
LC-150M2E
2. SPECIFICATIONS
Type: LCD display unit (LCD color AV monitor)
Size: 20" type (298.8 mm ×401.3 mm)
Display System: Transmitting type TN liquid crystal panel.
Driving System: TFT (Thin Film Transistor) active matrix system
Number of Picture Elements: 885,120 (640 (H) ×3 (RBG) ×461 (V))
Speaker Output: 4.0 W (Front 0.7W + 0.7W, Rear 2.6W)
Speaker: 30 mm ×40 mm (Elliptic) ×2 (Front)
ø80mm (Round) ×1
Light Source: Edge Light (Fluorescent light cold cathode pipe ×6, Optical system)
Connected Terminals: DC Input Terminal (DC13V), S-Video Input Terminal, Video Input Terminal 2
System, Audio Input Treminal 2 System (As for 1 system of the video input
terminal, the audio input terminal, switching is possible for the one for the monitor
output.)
Component Video Terminal, Component Video Audio Terminal, RGB Input
Terminal, Serial Control Terminal, Headphone Output Terminal
Power Source: AC 110~240·50/60Hz (Connected to AC Adapter)
Power Consumption (Approx.): 20" type 50.7 W (DC 13V Input)
Operating Temparature: 0°C~40°C
Dimensions: 460 mm (W) ×435 mm (H) ×180 mm (D) (Includes Set Stand)
460 mm (W) ×406 mm (H) ×49.5 mm (D) (Not Include Set Stand)
Weight (Approx.): 8.7 kg (Includes Set Stand)
6.3 kg (Not Include Set Stand)
Accessories: Operation Manual, AC Adapter, AC Cable, Remote Control,
Batteries (AAA size x 2), AV Cable, RS232C Cable, Cable Clamp (×2),
Back Cover (×1)
Specifications are subject to changed without prior notice.

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LC-20VM2E LC-121M2E
LC-150M2E
3. PART NAMES

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LC-20VM2E
LC-121M2E
LC-150M2E
4. OUTLINE DIMENSION FIGURE

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LC-20VM2E LC-121M2E
LC-150M2E
5. REMOVINGTHE MAIN PARTS
1. Remove the four main PWB fixing screws.
2. Remove the three inverter PWB fixing screws.
3. Remove the four RGB terminal PWB fixing screws.
4. Remove the one terminal PWB fixing screw and 1 earth
fixing screw to remove the reinforcing plate.
5. Remove the two LCD unit fixing screws.
6. Remove the three operation PWB fixing screws.
6
5
3
12
4
5
÷
LCD Display Unit
RGB Terminal PWB
(Main PWB)
Inverter PWB
Terminal PWB Ass'y
Reinforcing Plate
Cabinet A
Operate PWB

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LC-20VM2E
LC-121M2E
LC-150M2E
Lamp Unit (Upper)
(KLMP-0091CEZZ)
Lamp Reflector (Upper)
(PSHEP0184CEZZ)
LCD Display Unit
Lamp Unit (Lower)
(KLMP-0092CEZZ)
Lamp Reflector (Lower)
(PSHEP0185CEZZ)
Spacer (Lower)
Diffusion Sheet
Light Guide Sheet
Spacer (Upper)
Reflection Polarising Sheet
Reflection Sheet A
(PSHEP0186CEZZ)
7
7
8
9
12
14
11
9
11
10
12
13
Reflection Sheet B
(PSHEP0187CEZZ)
Shield Plate
ITO Sheet
LCD Display Unit
(Front)
7
7
7. RemovethefourLCDunitfrontfixingscrewsand4rear
fixing screws to remove the shield plate.
8. Remove the two reflection sheets.
9. Remove the upper and lower fluorescent tubes.
10.Remove the light guide plate.
11.Remove the upper and lower reflection sheets.
12.Remove the upper and lower spacers.
13.Remove the ITO sheet.
14.Removethediffusionsheetandthereflectionpolarizing
plate.
•Caution for handling the LCD panel
1. Work in a clean room. (Humidity: 50% or more)
2. A worker must wear arm bands.
3. Work on a conductive mat.
4. Do not expose the unit to shock such as fall or vibration.
5. Use an ionizer. (within 30 cm)

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LC-20VM2E LC-121M2E
LC-150M2E
The best adjustment is made before shipping. If any position deviation is found or after part replace is performed, adjust
as follows.
6-1. Preparation for adjustment
(1)Use the exclusive-use AC adapter or stable DC power supply.
AC adapter: UADP-0205CEZZ
DC power supply: 13 (V) 5(A) (Total of the triple power supply)
6-2. Special mode setting procedure
Note: When a micro-controller (IC2001) is replaced, the initialization of the E2memory is necessary.
(1)After initialization of E2PROM the mode is changed to the adjustment mode.
[Procedure]
Connect TP2002 and TP2003 to GND, and turn on the power.
[Description]
All data are initialized.
(2)Change to adjustment mode
[Procedure]
Press the “ADJUSTMENT” key on the remote control.
[Description]
The manual adjustment or adjustment through communication with the automatic machine is performed.
(3)Inspection mode
[Procedure]
After turning on the power, press the “INSPECTION” key on the remote control.
(4) Switching to the factory default setting mode
[Procedure]
After turning on the power, press the “DEFAULT SETTING” key on the remote control.
“SETTING COMPLETE” appears on the screen.
[Description]
Set the user adjustment value to default.
6-3. How to exit from the special mode
Turn off the main unit power.
6. LC-20VM2 ADJUSTING METHOD

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LC-20VM2E
LC-121M2E
LC-150M2E
6-4. OSD menu indication and items in case of manual adjustment
Adjusting range
Page Item Minimum Maximum Initial Remarks
1 + B – ADJ 0 255 160
MODEL VM2U VM1/VM2E/VM2U
NTSC/PALM OSC 0 255 128
PAL/SECAM OSC 0 255 128
ERROR NO 0 0 Number of the error detection
ERROR RESET WAIT WAIT/RESET
COM 0 255 90
BELL FO 0 255 120
B-Y BLACK LEVEL 0 15 8
R-Y BLACK LEVEL 0 15 8
COPY GUARD ON OFF/ON
2 SYSTEM AUTO N358/N443/PAL/PAL-
LOUNDNES OFF ON/OFF
TA1276 DATA 0000
TEST PATTERN OFF ON/OFF
I2C DATA 000000
I2C DATA WAIT WAIT/SEND
G/A W DATA 0000
G/A W DATA WAIT WAIT/SEND
G/A R DATA 00
G/A R DATA WAIT WAIT/SEND
G/A R DATA 00
ROM COLLECTION WAIT To the data input screen
3 N358 BRIGHTNESS 0 255 130
R CUTOFF 0 255 80
B CUTOFF 0 255 80
N358 UNICOLOR 0 127 60
R DRIVE 0 127 64
B DRIVE 0 127 64
N358 SCOLOR 0 31 25
N358 TINT 0 127 67
N443 BRIGHTNESS 0 255 130
N443 UNICOLOR 0 127 50
N443 SCOLOR 0 31 25
N443 TINT 0 127 62

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LC-20VM2E LC-121M2E
LC-150M2E
4 PAL-M BRIGHTNESS 0 255 130
PAL-M UNICOLOR 0 127 50
PAL-M SCOLOR 0 31 24
PAL-M TINT 0 127 62
PAL BRIGHTNESS 0 255 130
PAL UNICOLOR 0 127 50
PAL SCOLOR 0 31 19
PAL TINT 0 127 62
SECAM BRIGHTNESS 0 255 130
SECAM UNICOLOR 0 127 80
SECAM SCOLOR 0 127 75
SECAM TINT 0 127 58
5 DVD 60 BRIGHTNESS 0 255 130
DVD 60 UNICOLOR 0 127 65
DVD 60 COLOR 0 127 61
DVD 60 TINT 0 127 67
DVD 50 BRIGHTNESS 0 255 130
DVD 50 UNICOLOR 0 127 65
DVD 50 COLOR 0 127 61
DVD 50 TINT 0 127 62
DVD 60 R-Y PHASE 0 3 2
DVD 60 B-Y PHASE 0 3 3
DVD 50 R-Y PHASE 0 3 2
DVD 50 R-Y PHASE 0 3 1
6 RGB BRIGHTNESS 0 255 70
RGB R CUTOFF 0 255 80
RGB B CUTOFF 0 255 80
RGB CONTRAST 0 127 90
RGB R DRIVE 0 127 64
RGB B DRIVE 0 127 64
MASK OFF ON/OFF
HMASK-L 0 FF 2 Hexadecimal indication
HMASK-R 0 FF FD Hexadecimal indication
RGB CLOCK 0 3FF 320 Hexadecimal indication
DATA COPY
AD CHECK OFF ON/OFF
7 AV NT/PALM H 0 7F 19 Hexadecimal indication
DVD 60 H 0 7F 1D Hexadecimal indication
AV PAL H 0 7F 12 Hexadecimal indication
DVD 50 H 0 7F 14 Hexadecimal indication
AV SECAM H 0 7F 10 Hexadecimal indication
RGB H 0 7F 9C Hexadecimal indication
RGB TEXT H 0 7F 9C Hexadecimal indication
NT/PALM V 1 1F 0B Hexadecimal indication
PAL V 1 1F 0A Hexadecimal indication
SECAM V 1 1F 09 Hexadecimal indication
RGB V 1 3F 1D Hexadecimal indication
RGB TEXT V 1 3F 25 Hexadecimal indication

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LC-20VM2E
LC-121M2E
LC-150M2E
8 N358 R-Y PHASE 0 3 2
N358 B-Y PHASE 0 3 1
N443 R-Y PHASE 0 3 2
N443 B-Y PHASE 0 3 1
PAL-M R-Y PHASE 0 3 2
PAL-M B-Y PHASE 0 3 1
PAL R-Y PHASE 0 3 2
PAL B-Y PHASE 0 3 1
SECAM R-Y PHASE 0 3 2
SECAM B-Y PHASE 0 3 1
COLOR 0 127 60
SCONT 0 31 18
9 SPEED 9600 600/1200/2400/4800/9600/19.2k
PARITY NONE NONE/EVEN/ODD
TIME OUT 0 FF 0 Hexadecimal indication
10 GAMMA TEST OFF ON/OFF
AV V0 0 255 240
AV V0 BIAS 0 255 127
AV V16 0 255 185
AV V16 BIAS 0 255 127
AV V32 0 255 123
AV V32 BIAS 0 255 118
AV V48 0 255 75
AV V48 BIAS 0 255 127
AV V63 0 255 40
AV V63 BIAS 0 255 127
11 GAMMA TEST OFF ON/OFF
RGB V0 0 255 240
RGB V0 BIAS 0 255 127
RGB V16 0 255 185
RGB V16 BIAS 0 255 127
RGB V32 0 255 123
RGB V32 BIAS 0 255 118
RGB V48 0 255 75
RGB V48 BIAS 0 255 127
RGB V63 0 255 40
RGB V63 BIAS 0 255 127
6-5. Adjustment process mode special key operation
With the “AUTO PRESET” key on the remote control Forward movement of the page
With the “MANUAL MEMORY” key on the remote control Moves to the first line of the current page
With the “MENU” key on the remote control or the main unit Forward movement of the selection item
With the “PICTURE SELECTION” key on the remote control Backward movement of the selection item

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LC-20VM2E LC-121M2E
LC-150M2E
6-6. Service Adjusting
6-6-1. Main chassis adjustment
Adjustment Adjusting conditions Adjusting method
1 +B Adjustment 1. Connect the DC voltmeter to 1. Adjust the DC/DC 5V line output
(+B ADJ Item) TP1101 voltage so as to get 5.0±0.05V.
( DAC 16ch )
2 Setting
(MODEL) MODEL V2E
(SYSTEM) SYSTEM AUTO
(COPY GUARD) COPY GUARD ON
(MASK) MASK OFF
3 Counter-bias adjustment 1. Set the AV1 mode to set signal 1. Adjust COM so as to minimize the
(COM Item) noninput state. waveform peak-peak.
2. Fit the specified adjusting instrument (DAC2 2ch)
to the screen center.
3. Observe the adjusting instrument
output on the oscilloscope.
4 NTSC / PALM OSC 1. Input the NTSC monoscope 1. Adjust OSC so as to get the normal
adjustment pattern to AV1. screen.
(NTSC/PALM OSC Item)
6-6-2. N358 signal adjustment
Adjustment Adjustment conditions Adjustment method
1 Brightness adjustment 1. Input the NTSC standard color bar 1. Adjust N358 BRIGHTNESS, and
(N358 BRIGHTNESS Item) to AV1. adjust the black level of G output so
2. Connect the oscilloscope to TP821 as to get DC 0.35±0.05V.
(IC316, pin7, G output).
2 R CUTOFF adjustment 1. Input the NTSC standard color bar 1. Adjust R CUTOFF so as to equalize
(R CUTOFF Item) to AV1. the black levels of green and red.
2. Connect CH1 of the oscilloscope to
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP819 (IC315, pin1, R output).

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LC-20VM2E
LC-121M2E
LC-150M2E
3 B CUTOFF adjustment 1. Input the NTSC standard color bar 1. Adjust B CUTOFF so as to equalize
(B CUTOFF Item) to AV1. the black levels of green and blue.
2. Connect CH1 of the oscilloscope to
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP820 (IC316, pin1, B output).
4 Unicolor adjustment 1. Input the NTSC standard color bar 1. Adjust N358 UNICOLOR so as to
(N358 UNICOLOR Item) to AV1. get 2.3±0.1Vp-p between the 100%
2. Connect the oscilloscope to TP821 white and GND.
(IC316, pin7, G output).
5 R DRIVE adjustment 1. Input the NTSC standard color bar 1. Adjust so as to get 100% white level
(R DRIVE Item) to AV1. identical with that of green.
2. Connect CH1 of the oscilloscope to
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP819 (IC315, pin1, R output).
6 B DRIVE adjustment 1. Input the NTSC standard color bar 1. Adjust so as to get 100% white level
(B DRIVE Item) to AV1. identical with that of green.
2. Connect CH1 of the oscilloscope to
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP820 (IC316, pin1, B output).
7 Colour level adjustment 1. Input the NTSC standard color bar 1. Adjust N358 SCOLOR so as to get
(N358 SCOLOR Item) to AV1. the color bar signal blue amplitude
2. Connect the oscilloscope to TP820 (GND - peak level) equal to 1.8V ±
(IC316, pin1, B output). 0.1Vp-p.
8 Tint adjustment 1. DAC value is set in "67".
(N358 TINT Item)

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LC-20VM2E LC-121M2E
LC-150M2E
Adjustment Adjustment conditions Adjustment method
1 PAL/SECAM OSC 1. Input the PAL standard color bar 1. Adjust PAL/SECAM OSC so that
adjustment to AV1. the screen becomes clear.
(PAL/SECAM OSC)
2 Brightness adjustment 1. Input the PAL standard color bar 1. Adjust PAL BRIGHTNESS, and
(PAL BRIGHTNESS) to AV1. adjust the black level of G output
2. Connect oscilloscope to TP821 so as to get DC 0.35±0.05V.
(IC316, pin7, G output).
3 Unicolor adjustment 1. Input the PAL standard color bar 1. Adjust PAL UNICOLOR so as to get
(PAL UNICOLOR) to AV1. 2.3±0.05Vp-p between the 100%
2. Connect oscilloscope to TP821 white and GND.
(IC316, pin7 , G output).
4 Color level adjustment 1. Input the PAL standard color bar 1. Adjust PAL SCOLOR so as to get
(PAL SCOLOR) to AV1. the color bar signal blue amplitude
2. Connect oscilloscope to TP820 (GND - peak level) equal to 1.8V ±
(B output). 0.1Vp-p.
5 Tint adjustment 1. DAC value is set in "62".
(PAL TINT)
6 Scanning conversion 1. Short-circuit between TP4101 and 1. Adjust the frequency to 15.625±
oscillation adjustment GND. 0.01kHz by rotating L4101.
(L4101) 2. Connect frequency counter TP4102
and GND.
7 PAL-Y level adjustment 1. Input the PAL standard color bar 1. Adjust between GND and the white
(R4162) toAV1. 100% to 2.3V.
2. Connect oscilloscope to TP802
(B output).
6-6-3. PAL signal adjustment

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LC-20VM2E
LC-121M2E
LC-150M2E
6-6-4. SECAM signal adjustment
Adjustment Adjustment conditions Adjustment method
1 BELL f0 adjustment 1. Connect the oscilloscope to 1. Adjust BELL f0 so that the level of
(BELL F0) TP2851. a becomes the minimum.
2 Brightness adjustment 1. Input the SECAM standard color bar 1. Adjust SECAM BRIGHTNESS, and
(SECAM BRIGHTNESS) to AV1. adjust the black level of G output to
2. Connect oscilloscope to TP821 DC 0.35±0.05V.
(IC316, pin7, G output).
3 Unicolor adjustment 1. Input the SECAM standard color bar 1. Adjust SECAM UNICOLOR so as to
(SECAM UNICOLOR) to AV1. get 2.3±0.05Vp-p between the 100%
2. Connect oscilloscope to TP821 white and GND.
(IC316, pin7, G output).
4 Color level adjustment 1. Input the SECAM standard color bar 1. Adjust SECAM COLOR so as to get
(SECAM COLOR) to AV1. the color bar signal blue amplitude
2. Connect oscilloscope to TP820 (GND - peak level) equal to 1.8V ±
(B output). 0.1Vp-p.
5 Tint adjustment 1. DAC value is set in "58".
(SECAM TINT)
6-6-5. Data copy
Adjustment Adjusting conditions Adjusting method
1 Data copy 1.A sound volume key is pushed. 1. If it is displayed with SEND and
displayed with WAIT, completion
(Data copies the adjustment value
of the PAL item on each item of N443,
PAL-M.

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LC-20VM2E LC-121M2E
LC-150M2E
6-6-6. N443, PAL-M signal adjustment (Actual adjustment manipulation is unnecessary because PAL
data is copied by the data copy manipulation of the former term.
Adjustment Adjusting conditions Adjusting method
1 Brightness adjustment 1.Input the NTSC standard color bar 1. Adjust N443 BRIGHTNESS, and
(N443, PAL-M to AV1. adjust the black level of G output so
BRIGHTNESS Item) 2. Connect oscilloscope to TP821 as to get DC 0.35±0.05V.
(IC316, pin7, G output).
2 Unicolor adjustment 1.Input the NTSC standard color bar 1. Adjust TV UNICOLOR so as to
(N443, PAL-M to AV1. get 2.3±0.1Vp-p between the 100%
UNICOLOR Item) 2. Connect oscilloscope to TP821 white and GND.
(IC316, pin7, G output).
3 Color level adjustment 1.Input the NTSC standard color bar 1. Adjust N443 SCOLOR so as to get
(N443, PAL-M to AV1. the color bar signal blue amplitude
SCOLOR Item) 2. Connect oscilloscope to TP820 (GND level - peak level) equal to
(IC316, pin1, B output). 1.8V ±0.1Vp-p.
4 Tint adjustment 1. DAC value is set in "62".
(N443, PAL-M TINT Item)

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LC-121M2E
LC-150M2E
6-6-7. Component (50/60Hz) input adjustment
Adjustment Adjusting conditions Adjusting method
1 Brightness adjustment 1.From SG, input the 100% white color 1. Adjust DVD 50/60 BRIGHTNESS, and
(DVD 50/60 BRIGHTNESS bar signal of PAL into conponent adjust the black level of G output so
Item) terminal. as to get DC 0.35±0.05V.
2. Connect oscilloscope to TP821
(IC316, pin7, G output).
2 Unicolor adjustment 1.From SG, input the 100% white colour 1. Adjust DVD 50/60 UNICOLOR so
(DVD 50/60 UNICOLOR bar signal of PAL into conponent as to get 2.3±0.1Vp-p between the
Item) terminal. 100% white and GND.
2. Connect oscilloscope to TP820
(IC316, pin1, B output).
3 Color level adjustment 1. DAC value is set in "61".
(DVD 50/60 COLOR Item)
4 Tint adjustment 1. DAC value is set in DVD 60 TINT
(DVD 50/60 TINT Item) "67" DVD 50 TINT "62".
6-6-8. RGB signal adjustment
Adjustment Adjusting conditions Adjusting method
1 RGB Brightness 1.Input the test pattern to RGB. 1. Adjust RGB BRIGHTNESS, and
adjustment 2. Connect oscilloscope to TP821 adjust the black level of G output so
(RGB BRIGHTNESS (IC316, pin7, G output). as to get DC 0.6±0.05V.
Item)
2 RGB R CUTOFF 1. Input the test pattern to RGB. 1. Adjust RGB R CUTOFF so as to
adjustment 2. Connect CH1 of the oscilloscope to equalizethe black levels of green and
(RGB R CUTOFF off Item) TP821 (IC316, pin7, G output). blue.
3. Connect CH2 of the oscilloscope to
TP819 (IC315, pin1, R output).
3 RGB B CUTOFF 1. Input the test pattern to RGB. 1. Adjust RGB B CUTOFF so as to
adjustment 2. Connect CH1 of the oscilloscope to equalizethe black levels of green and
(RGB B CUTOFF off Item) TP821 (IC316, pin7, G output). blue.
3. Connect CH2 of the oscilloscope to
TP820 (IC316, pin1, B output).

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LC-20VM2E LC-121M2E
LC-150M2E
4 RGB Contrast adjustment 1. Input the test pattern to RGB. 1. Adjust RGB CONTRAST so as to
(RGB CONTRAST Item) 2. Connect the oscilloscope to TP821 get 2.5±0.1Vp-p between the 100%
(IC316, pin7, G output). white and GND.
5 RGB R DRIVE adjustment 1. Input the test pattern to RGB. 1. Adjust so as to get 100% white level
(RGB R DRIVE Item) 2. Connect CH1 of the oscilloscope to identical with that of green.
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP819 (IC315, pin1, R output).
6 RGB B DRIVE adjustment 1. Input the test pattern to RGB. 1. Adjust so as to get 100% white level
(RGB B DRIVE Item) 2. Connect CH1 of the oscilloscope to identical with that of green.
TP821 (IC316, pin7, G output).
3. Connect CH2 of the oscilloscope to
TP820 (IC316, pin1, B output).
6-6-9. Finished adjustment
(1)N358 finished adjustment
Adjustment Adjusting conditions Adjusting method
1 Confrontation bias 1. A confrontation adjustment pattern is 1. It is adjusted so that the flicker of the
adjustment displayed. image plane may stop in the
(The 12th-page COM Item) confrontation adjustment pattern.
2 Black level adjustment 1. A JA-5CH signal is displayed. 1. It confirms that the third gradation is
(The 12th-page N358 a cut-off point from the left of the
BRIGHTNESS Item) gradation pattern.
3 White balance adjustment 1. A JA-6CH signal is displayed. 1. White balance in comparison with the
(The 12, 13th-page Typ monitor.
N358 R CUTOFF
N358 B CUTOFF
N358 R DRIVE
N358 B DRIVE Item)

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LC-121M2E
LC-150M2E
6-7. Monitor default settings
(1)Press the default setting key on the remote control after turning on the power switch.
"SETTING COMPLETE" appears on the screen.
The setting details are as follows:
CONTRAST CENTER
BRIGHTNESS CENTER
COLOR CENTER
TINT CENTER
BACK LIGHT AUTO
COLOR SYSTEM AUTO
Adjustment Adjusting conditions Adjusting method
1 Black level adjustment 1. Set is set in the compulsion PAL 1. It confirms that the third gradation is
(The 14th-page PAL mode. a cut-off point from the left of the
BRIGHTNESS Item) 2. A JA-5CH signal is displayed. gradation pattern.
(2)PAL finished adjustment
(3)DATA Copy
A sound volume key is manipulated in accordance with the data copy item.
Data is copied on each item of N443, PAL-M the adjustment value of the PAL item.
Adjustment Adjusting conditions Adjusting method
1 Black level contrast 1. The test pattern of the figure 1 is 1. 5 step RGB BRIGHTNESS value is
confirmation displayed. given to it by the figure 1 A point more
(The 4th-page than a cut-off.
RGB BRIGHTNESS 2. 5 step RGB CONTRAST value is
RGB CONTRAST Item) lowered by the figure 1 B point more
than white level saturation.
(4)RGB finished adjustment
Figure 1
Point BPoint A

20
LC-20VM2E LC-121M2E
LC-150M2E
7. INTEGRATED CIRCUITTERMINAL ARRANGEMENTS
7-1. IC2001 (QFP, 80pins) MICRO CONTROLER
Terminal No. Terminal name I/O Function Type
1 N. C – —
2 N. C – —
3 SCL I/O I2C bus serial clock line OD
4 SDA I/O I2C bus serial data line OD
5 H PDET I Headphon input pickup OD
6 DCLK O Clock for communication OD
7 DOUT O Data output for communication OD
8 DIN I Data input for communication OD
9 FS MUT O Front speaker MUTE output OD
10 RS MUT O Rear speaker MUTE output OD
11 N. C – —
12 N. C – —
13 CSYNC I Composite sync signal input OD
14 KEY1 I Key input 1 OD
15 REQ O “H” in SECAM mode, “L” in other modes. PP
16 GAEN I G/A read enable PP
17 MRDY I I2C bus opening/connection selection input OD
18 SIN I 232C data input OD
19 SCLK I/O 232C clock signal PU
20 SOUT O 232C data output OD
21 N. C – —
22 5 VIN I DC/DC5V voltage input OD
23 SCAN O PAL scanning line switching OD
24 LMUTE O Lineout-Mute output OD
25 N. C – —
26 N. C – —
27 CNV s s GND connection —
28 φO Timing output PP
29 RESET I Change to “Reset mode” in “L” state —
30 Xin I Microcomputer oscillator connection —
31 Xout O Microcomputer oscillator connection —
32 V s s I GND terminal —
33 STB O Microcomputer power OFF output PP
34 POWOUT O DC/DC control output PP
35 COCS O G/A chip selection output PP
36 DACS O D/A chip selection output PP
37 DA2CS O D/A2 chip selection output PP
38 232CCS O 232C chip selection output PP
39 N. C – —
40 N. C – —
41 L/R O When the right and left are reversed: H, Normal: L PP
42 YC O Dynamic YC separation PP
43 AV/RGB O Analog SW selection 2 PP
44 Y/COM O Analog SW selection 3 PP
45 IN/OUT O Video 2 input/monitor output switching PP
46 N358 O “H” in N358 mode, “L” in other modes. PP
47 N443 O “H” in N443 mode, “L” in other modes. PP
48 PAL O “H” in PAL mode, “L” in other modes. PU
49 SECAM O “H” in SECAM mode, “L” in other modes. PU