FILE NO. SERVICE MANUAL Multimedia Projector Model No. PLC-XP46/XP46L PLC-XP41/XP41L U.S.A., Canada, Europe, Asia, Africa Original Version PLC-XP41 PLC-XP46 Chassis No. MA8-XP4600 MA8-XP46L00 MB8-XP4100 MB8-XP41L00 NOTE: Match the Chassis No. on the unit’s back cover with the Chassis No. in the Service Manual.
■ Safety Instructions SAFETY PRECAUTIONS WARNING: The chassis of this projector is isolated (COLD) from AC line by using the converter transformer. Primary side of the converter and lamp power supply unit circuit is connected to the AC line and it is hot, which hot circuit is iden- tified with the line ( ) in the schematic diagram.
Horizontal Resolution 800 TV lines (HDTV) Projection Lens F 1.7 ~2.0 lens with f=48.2mm ~ 62.6mm with motor zoom and focus (PLC-XP46) F 1.8 ~2.1 lens with f=48.4mm ~ 62.8mm with motor zoom and focus (PLC-XP41) Throw Distance 4.6’ ~ 48.3’ (1.4m ~ 14.7m) (PLC-XP45), 4.6’ ~ 47.3’ (1.4m ~ 14.4m) (PLC-XP40)
■ Circuit Protections This projector is equipped with the following circuit protections to operate in safety. If the abnormality occurs inside the projector, it will automatically turn off by operating one of the following protection circuits. ● Fuse The fuse is located inside of the projector. When either the LAMP indicator or the READY indicator is not illuminated, fuse may be opened.
Circuit Protections ● Warning temperature and power failure protection The TEMP WARNING indicator flashes red and the projector will automatically turn off when the internal tempera- ture of the projector exceeds the normal temperature or when stopping cooling fans or when the internal power supply lines are failed.
■ Mechanical Disassemblies Mechanical disassemble should be made following procedures in numerical order. Following steps show the basic procedures, therefore unnecessary step may be ignored. Caution: The parts and screws should be placed exactly the same position as the original otherwise it may cause loss of performance and product safety.
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Mechanical Disassemblies Main Board removal Remove 7 screws to take the Main Board upward. Main Board Fig.3 AV, I/F Board & Rear Panel removal FN905 Remove 1 screw and take the Rear Panel ass’y upward off. Remove 4 screws to take the fan (FN905) off. Remove 5 screws and 1 screw to take AV Board...
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Mechanical Disassemblies Lamp Ballast Unit removal Ballast Cover Remove 4 screws to take the Ballast Cover upward FN903 off. Remove 2 screws to take the Fan (FN903) off. Remove the Sub Power Board and Drive Board by pulling them upward. Sub Power Board Ballast Board...
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Mechanical Disassemblies Prism Base removal Remove 2 screws to take the Prism Base ass’y upward off. Remove 2 screws to take the Lens Shift Motor and Sensor SW Holder from the Base. Prism Base Ass’y Motor and Sensor Holder Fig.7 Power Board removal Remove 3 screws to take the Power Board off.
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Mechanical Disassemblies Line Filter Board & Interlock SW & Thermal SW removal Remove 1 screw to take Interlock Switch(SW905). Remove 2 screws to take Filter Board Holder and remove 2 screws to take Filter Board from the Holder. Remove 1 screw to take Thermal Switch(SW902).
■ Optical Parts Disassemblies Before taking this procedure, remove Cabinet Top and Main Board following to the “Mechanical Disassemblies”. Disassembly requires a 2.0mm or 2.5mm hex wrench and a slot screwdriver. Projection Lens removal Remove Cabinet Front-Top following to the chapter “Mechanical Disassemblies”.
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Optical Pats Disassemblies Relay Lens disassembly Remove 2 hex screws and pull the Relay Lens ass’y upward. Remove 2 screws to take the Lens off from the holder. Note: There is no mounting direction of the lens. Holder Relay Lens Fig.3- Fig.3- Polarized Glass-Out and Wide view Glass removal...
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Optical Parts Disassemblies Optical Unit Top removal Remove 7 screws to take the Optical Unit Top off upward. Fig.5 Condenser Lens disassembly Remove 2 hex screws and take the Condenser Lens ass’y. Release 4 hooks to take the Lens off from the holder. * Lens should be placed as the flat surface side comes to the holder...
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Optical Parts Disassemblies Locations and Directions Key No. Description When the optical parts in the optical unit mounting or assembling, the Condenser lens (R) parts must be mounted in the specified location and direction as Condenser lens shown in figure below. Condenser lens Mirror (B) Optical filter (UV cut)
■ LCD Panel/Prism Ass’y Replacement IMPORTANT NOTICE on LCD Panel/Prism Ass'y Replacement LCD panels used for this model can not be replaced separately. Do not disassemble the LCD Panel/Prism Ass’y. These LCD panels are installed with precision at the factory. When replacing the LCD panel, should be replaced whole of the LCD panels and prism ass’y at once.
■ Lamp Replacement WARNING: ORDER REPLACEMENT LAMP - For continued safety, replace with a lamp assembly of the same type. Type No. Service Parts No. - Allow the projector to cool for at least 45 minutes before you open the POA-LMP47 610 297 3891 lamp cover.
■ Optical Adjustments Before taking optical adjustments below, remove the Cabinet Top and Main Board following to the “Mechanical Disassemblies” Adjustments require a 2.0mm hex wrench and a slot screwdriver. Note: Do not disconnect connectors K8L, K8X, K8D, K8G and K8E on the main board, because the projector can not turn on due to operate the power failure protection.
Optical Adjustments Condenser Lens adjustment Turn the projector on by a state of without FPC cables. Adjust the adjustment base of condenser lens ass’y to make color uniformity in white. 1) If the shading appears on the left or right of the screen as White shown in Fig.2-1, loosen 2 screws with the 2.0mm hex driv-...
Optical Adjustments Relay lens-Out adjustment Turn the projector on by a state of without FPC cables. Adjust the adjustment base of relay lens ass’y to make color unifor- mity in white. 1) If the cyan bar appears on the left or right of the screen as shown in Fig.4-1, loosen 1 screw with the 2.0mm hex driver, and White...
■ Electrical Adjustments ● Service Adjustment Menu Operation To enter the service mode To enter the “Service Mode”, press and hold the MENU and IMAGE button on the projector at the same time for more than 3 seconds. The service menu appears on the screen as follows. To adjust service data Select the adjustment group no.
Electrical Adjustments ● Circuit Adjustments CAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the follow- ing adjustments except requiring the readjustments in servicing otherwise it may cause loss of per- formance and product safety.
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Electrical Adjustments Black Level adjustment NRS adjustment 1. Receive the 16-step gray scale computer signal with 1. Receive the a6-step gray scale computer signal with Input 1 [COMPUTER] mode. Input 1 [COMPUTER] mode. 2. Enter the service mode. 2. Enter the service mode. TP531 3.
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Electrical Adjustments 8. Select item no. “ and change data value to adjust PC Gamma Shift adjustment the pedestal level and black level to be the same 1. Receive the 16-step gray scale computer signal with level. Input 1 [COMPUTER] mode. 2.
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Electrical Adjustments HDTV Gain adjustment VIDEO Pedestal adjustment 1. Receive the 16-step gray scale component signal 1. Receive the 16-step gray scale video signal with [1080i] with Input 3 [COMPONENT] mode. Input 3 [VIDEO] mode. 2. Enter the service mode. 2.
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A/D Offset adjustment Video Gamma Shift adjustment 1. Receive the 16-step gray scale video signal with 1. Receive the 16-step gray scale video signal with Input 3 [VIDEO] mode. Input 3 [VIDEO] mode. 2. Enter the service mode. 2. Enter the service mode. TP531 3.
Electrical Adjustments ● Service Adjustment Data Table These initial values are the reference data written from the CPU ROM to memory IC when replaced new memory IC. The adjust- ment items indicated with “✻” are required to readjust following to the “Electrical adjustments”. Other items should be used with the initial data value.
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Electrical Adjustments Adjustment Item Initial Value Range Input source / Description Lamp-use time accumulated Read only Net Board Reset 0 ~ 1 0: Invalid , 1: Valid Key Stone Option 0 ~ 1 0: Fixed, 1: Change with inpt signal Group: 11 Fan Control FAN_TEMP_A_WARNING 30 ~ 100...
■ Troubleshooting No Power The possible causes of No Power are listed below. Please check following and refer to power supply and protection cir- 2. Abnormality occurs on drive signals for power cuits diagram in the figure opposite. or lamp circuit. 1.
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Troubleshooting Power supply drive and protection diagrams and locations F601 IC1691 SW902 IC1872 SW905 IC1871 LAMP Ass'y LAMP BALLAST UNIT POWER BOARD SW902 SW905 F601 IC1691 Fuse Interlock sw. AC IN Thermal sw. TEMP. SENS. TSW601 IC601 K16I P.F.CONTROL SENSOR1 BOARD Power Oscillator...
Troubleshooting No Picture The possible causes of No Picture are listed below. Please 3. No picture from both of Video and Computer check following and refer to video signal processing dia- sources. grams in the figure opposite. Check RGB signals at test points TP20R, TP21R, TP20G, TP21G, TP20B and TP21B.
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Troubleshooting Video Signal processing diagrams K10Q VIDEO COMPUTER -38-...
Troubleshooting No Sound 1. No audio signals at AV input circuit. 3. No audio output signal at speakers. Check audio signals at pins 1, 13 (CG1), 5, 14 (CG2) and Check audio signals at pins 3, 4 and 1, 2 of K16U on M 2, 12 (VIDEO) of IC5011 on AV Board.
Troubleshooting Lens Motor Problems 1. No drive signals supplied at motors Logic Table of IC1611/IC1602/IC1601 Check drive signals at pins 1 and 2 of K16M for focus Input Output Operation motor, pins 3 and 4 of K16M for zoom motor and pins 1 and 2 of K16L for lens shift motor on Power Board.
■ Control Port Functions ● System Control & I/O Port Table (IC801) Pin No. Name Function Name Function Polarity PA23/WRHH USB RESET USB Reset Signal Active L PE14/TIOC4C/DACK0/AH IC RESET Power on/off control except FAN and LAMP Active L PA22/WRHL PA21/CASHH RS232C_SW Not used...
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Control Port Functions Pin No. Name Function Name Function Polarity PD16/D16/IRQ0 reserve PD15/D15 DATA15 Data Bus 15 PD14/D14 DATA14 Data Bus 14 PD13/D13 DATA13 Data Bus 13 PD12/D12 DATA12 Data Bus 12 PD11/D11 DATA11 Data Bus 11 PD10/D10 DATA10 Data Bus 10 PD9/D9 DATA9 Data Bus 9...
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Control Port Functions ● Parallel I/O Expander (IC1801, M66500FP) Pin No. Name Function Name Function Polarity CG_FILTER D_TURBO_SEL DIGITAL TURBO Selection 5 V ±10 % A SW1 Audio SW 1 A SW2 Audio SW 2 SEL_BAISOKU Double Scan Selection IP_CSA CPU Strobe signal for IP Conversion IP+RESETSW CPU reset signal for IP Conversion...
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Control Port Functions ● IIC Bus I/O Expander (IC1641, M62320FP) Port Functions Pin No. Name Function Action Serial Data output port (Not connected) IIC BUS SCL IIC BUS SDA FOCUS+ FOCUS + Active H FOCUS- FOCUS - Active H ZOOM+ ZOOM + Active H ZOOM-...
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Control Port Functions ● IIC Bus DA Converter (IC3551, M62399FP) Port Functions Pin No. Name Function Serial Data output port (Not connected) IIC BUS SCL IIC BUS SDA V_COMR V_COMG V_COMB VrefL DAC Lower Reference Voltage input VrefU 1 DAC Upper Reference Voltage input (CH5~CH8) VrefU2 DAC Upper Reference Voltage input (CH1~CH 4) NRSB...
■ Cleaning After long periods of use, dust and other particles will accumulate on the LCD panel, prism, mirror, polarized glass, lens, etc., causing the picture to darken or color to blur. If this occurs, clean the inside of optical unit. Remove dust and other particles using air spray.
■ Electrical Parts List MA8-XP4600, MA8-XP46L00, MB8-XP4100, MB8-XP41L00 Product safety should be considered when a component replacement is made in any area of a projector. Components indicated by a mark in this parts list and the circuit diagram show components whose value have special significance to product safety.
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MA8-XP4600, MA8-XP46L00, MB8-XP4100, MB8-XP41L00 Electrical Parts List Note: Parts order must contain Chassis No., Part No., and Descriptions. ● OUT OF CIRCUIT BOARD RC1 Board Sensor1 Board FN901 Cooling Fan FN903 Cooling Fan Drive Board Power Board Sub Power Main Board Board Lamp Ballast FN902...
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MA8-XP4600, MA8-XP46L00, MB8-XP4100, MB8-XP41L00 Electrical Parts List Key No. Part No. Description Key No. Part No. Description R6897 401 105 1501 MT-GLAZE 1.5K JA 1/16W ASSEMBLIED BOARDS R6898 401 105 5202 MT-GLAZE 470 JA 1/16W 610 293 1815 ASSY,PWB,CONTROL MA8A 1AA0B10C3390A DIODE 610 293 1839 ASSY,PWB,RC FRONT MA8A...
■ Mechanical Parts List MA8-XP4600, MA8-XP46L00, MB8-XP4100, MB8-XP41L00 Note: Parts order must contain Chassis No., Part No., and Descriptions. ● CABINET PARTS -87-...
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CABINET FRONT A-MA8A 411 174 9308 BOLT HEX-SCT+SW+W 2.5X6 610 297 3921 CABINET BOTTOM-MA8AA 411 174 9407 BOLT HEX-SCT 2.5X6 (For Model PLC-XP46 only) 411 030 7301 SCR BIN 2X6 610 294 9360 CAP LENS-MA8A (For Model PLC-XP41 only) 610 277 2203...
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MA8-XP4600, MA8-XP46L00, MB8-XP4100, MB8-XP41L00 Mechanical Parts List 51-b 51-a 23-a 23-b -89-...
■ Optical Parts List MA8-XP4600, MA8-XP46L00, MB8-XP4100, MB8-XP41L00 Note: Parts order must contain Chassis No., Part No., and Descriptions. 67: Red 68: Green 69: Blue -90-...
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MA8-XP4600, MA8-XP46L00, MB8-XP4100, MB8-XP41L00 Optical Parts List 53-d 53-a: Red 53-b: Blue 53-c: Green -91-...
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MA8-XP4600, MA8-XP46L00, MB8-XP4100, MB8-XP41L00 Optical Parts List CAUTION: Part must be placed in specified direction when replacing the optical parts. Please see “Optical Parts Disassemblies” for further instructions. -92-...
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I/F BOARD 1AA0B10C3670B These schematic diagrams and printed wiring board drawings are a part of the serv- ice manual original for chassis No. MA8-XP4600, MA8-XP46L00, MB8-XP4100 and MB8-XP41L00, model PLC-XP46, PLC-XP46L, PLC-XP41 and PLC-XP41L. File with the service manual No. SM5110329.
■ Parts description and reading in schematic diagram 1. The parts specification of resistors, capacitors and Resistor Reading coils are expressed in designated code. Please check Example 1/2 D J 10K B the parts description by the following code table. 2.
Printed Wiring Board Diagrams PLC-XP46 (MA8AA) Page A13 [Left] ■ Printed Wiring Board Diagrams CAUTION This projector is isolated from AC line by using the internal converter transformer. Please pay attention to the following notes in servicing 1. Do not touch the part on hot side (primary circuit) or both parts on hot and cold sides (second circuit) at the same time.