Sharp lc20vm2e schematic

LC-121M2E LC-150M2E
SERVICE MANUAL LCD AV MONITOR
SERVICE MANUAL
SX9S3LC20VM2E
LCD AV MONITOR
LC-20VM2EMODEL
In the interests of user-safety (Required by safety regula­tions in some countries) the set should be restored to its original condition and only parts identical to those specified be used.
LC-20VM2E
LC-20VM2E
1. IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................... 2
2. SPECIFICATIONS ................................................................................................................................... 3
3. PART NAMES.......................................................................................................................................... 4
4. OUTLINE DIMENSION FIGURE.............................................................................................................. 5
MODEL LC-20VM2E
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
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.
CONTENTS
Page
Suffix symbol ( , K , X )
SHARP CORPORATION
1
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LC-20VM2E
DVM
AC SCALE
1.5k ohms. 10W
0.15 µF
TEST PROBE
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:
LC-121M2E LC-150M2E
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.
A V
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-me­tallic control knobs, insulation materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc.
3. To be sure that no shock hazard exists, check for current in the following manner.
• Plug the AC Adaptor directly into a 100~240 volt 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 a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.
• 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 and control shafts, escutcheon, etc.) and meas­ure the AC voltage drop across the resistor. All checks must be repeated with the AC Adap­tor plug connection reversed.(If necessary, a nonpolarized adaptor plug must be used only for the purpose of completing these checks.)
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.
TO EXPOSED METAL PARTS
CONNECT TO KNOWN EARTH GROUND
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 nec­essarily 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 areas in the 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.
Replacement Parts Lists
.
2
LC-121M2E LC-150M2E
2. SPECIFICATIONS
Number of Picture Elements: 885,120 (640 (H) × 3 (RBG) × 461 (V))
Connected Terminals: DC Input Terminal (DC13V), S-Video Input Terminal, Video Input Terminal 2
Power Consumption (Approx.): 20" type 50.7 W (DC 13V Input)
Operating Temparature: 0°C~40°C
Specifications are subject to changed without prior notice.
LC-20VM2E
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
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)
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)
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)
3
LC-20VM2E
3. PART NAMES
LC-121M2E LC-150M2E
4
LC-121M2E LC-150M2E
4. OUTLINE DIMENSION FIGURE
LC-20VM2E
5
LC-20VM2E
5. REMOVING THE 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.
LC-121M2E LC-150M2E
LCD Display Unit
3
RGB Terminal PWB
1
(Main PWB)
2
Inverter PWB
Terminal PWB Ass'y
Reinforcing Plate
4
5
5
6
Operate PWB
÷
Cabinet A
6
LC-121M2E LC-150M2E
•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)
LC-20VM2E
7. Remove the four LCD unit front fixing screws and 4 rear 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.Remove the diffusion sheet and the reflection polarizing plate.
7
LCD Display Unit (Front)
Spacer (Upper)
ITO Sheet
LCD Display Unit
Lamp Reflector (Upper) (PSHEP0184CEZZ)
Light Guide Sheet
12
13
14
Reflection Polarising Sheet
Lamp Unit (Upper) (KLMP-0091CEZZ)
9
11
10
Diffusion Sheet
12
Spacer (Lower)
7
9
Lamp Unit (Lower) (KLMP-0092CEZZ)
Lamp Reflector (Lower)
11
(PSHEP0185CEZZ)
7
7
Shield Plate
8
Reflection Sheet A (PSHEP0186CEZZ)
Reflection Sheet B (PSHEP0187CEZZ)
7
LC-20VM2E
6. LC-20VM2 ADJUSTING METHOD
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 E2 memory 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.
LC-121M2E LC-150M2E
(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.
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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
LC-20VM2E
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
9
LC-20VM2E
4 PAL-M BRIGHTNESS 0 255 130
5 DVD 60 BRIGHTNESS 0 255 130
LC-121M2E LC-150M2E
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
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
10
LC-121M2E LC-150M2E
8 N358 R-Y PHASE 0 3 2
9 SPEED 9600 600/1200/2400/4800/9600/19.2k
10 GAMMA TEST OFF ON/OFF
LC-20VM2E
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
PARITY NONE NONE/EVEN/ODD TIME OUT 0 FF 0 Hexadecimal indication
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
11
LC-20VM2E
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.
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.
LC-121M2E LC-150M2E
( DAC 16ch )
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).
12
LC-121M2E LC-150M2E
3 B CUTOFF adjustment 1. Input the NTSC standard color bar 1. Adjust B CUTOFF so as to equalize
4 Unicolor adjustment 1. Input the NTSC standard color bar 1. Adjust N358 UNICOLOR so as to
5 R DRIVE adjustment 1. Input the NTSC standard color bar 1. Adjust so as to get 100% white level
LC-20VM2E
(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).
(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).
(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)
13
LC-20VM2E
6-6-3. PAL signal adjustment
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
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%
LC-121M2E LC-150M2E
2. Connect oscilloscope to TP821 so as to get DC 0.35±0.05V. (IC316, pin7, G output).
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) to AV1. 100% to 2.3V.
2. Connect oscilloscope to TP802 (B output).
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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
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%
LC-20VM2E
2. Connect oscilloscope to TP821 DC 0.35±0.05V. (IC316, pin7, G output).
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.
15
LC-20VM2E
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).
LC-121M2E LC-150M2E
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)
16
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).
LC-20VM2E
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).
17
LC-20VM2E
4 RGB Contrast adjustment 1. Input the test pattern to RGB. 1. Adjust RGB CONTRAST so as to
5 RGB R DRIVE adjustment 1. Input the test pattern to RGB. 1. Adjust so as to get 100% white level
LC-121M2E LC-150M2E
(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.
(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
(2)PAL finished adjustment
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.
(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.
(4)RGB finished adjustment
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
LC-20VM2E
than white level saturation.
Figure 1
Point BPoint A
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
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LC-20VM2E
7. INTEGRATED CIRCUIT TERMINAL 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 φ O 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
LC-121M2E LC-150M2E
20
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