Canon LV-S4 Service Manual
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Canon LV-S4 Service Manual

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FILE NO.

SERVICE MANUAL

Multimedia Projector
Model No. LV-S4
Original Version

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Summary of Contents for Canon LV-S4

  • Page 1: Service Manual

    FILE NO. SERVICE MANUAL Multimedia Projector Model No. LV-S4 Original Version...

  • Page 2: Table Of Contents

    ■ Contents - NOTE - The different points between the previous model LV-S3 and the new model LV-S4 as follows; - The electrical circuit (the LCD panels and the IN/OUT terminals) - The lamp, lamp ballast and fan controls - The optical parts...

  • Page 3: Safety Instructions

    ■ 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.

  • Page 4: Specifications

    ■ Specifications * Following information differs from the model LV-S3 ; - the mechanical and electrical specifications Mechanical Information Projector Type Multi-media Projector Dimensions (W x H x D) 10.63" x 3.27" x 7 .76" (270mm x 83.1mm x 197 .2mm) (not including Adjustable Feet) Net Weight 5.1lbs (2.3 kg) Feet Adjustment...

  • Page 5: Fuse

    ■ Circuit Protections * Following information differs from the model LV-S3 ; - the cabinet This projector provides the following circuit protections to operate in safety. If the abnormality occurs inside the pro- jector, it will automatically turn off by operating one of the following protection circuits. ●...

  • Page 6: Warning Temperature And Power Failure Protection

    * Following information differs from the model LV-S3 ; Circuit Protections - the cabinet, the air filter 3pcs. --> 4 pcs. ● Warning temperature and power failure protection The WARNING indicator flashes red and the projector will automatically turn off when the internal temperature of the projector exceeds the normal temperature or when stopping cooling fans or when the internal power supply lines are failed.

  • Page 7: Lamp Replacement

    ■ Lamp Replacement * Following information differs from the model LV-S3; - the replacement lamp number, SET --> OK button. WARNING: - Allow a projector to cool, for at least 45 minutes before you open Lamp ORDER REPLACEMENT LAMP Cover. The inside of a projector can become very hot. Type No.

  • Page 8: Mechanical Disassemblies

    ■ Mechanical Disassemblies * Following information differs from the model LV-S3 ; - the new cabinet and 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.
  • Page 9 Mechanical Disassemblies Cabinet Front, R/C Board and Speaker removal Remove 2 screws (M3x6) and 2 screws (M3x6) to Speaker Cabinet Front take the Cabinet Front off. (SP901) Remove 1 screw (T3x6) to the R/C Board on the Cabinet Front. Remove 2 screws (T3x6) to take the Speaker (SP901) off.
  • Page 10 Mechanical Disassemblies Rear Panel, AV Board and FN903 removal Take the Rear Panel ass’y upward off and remove 1 AV Board screw (M4x4) . Remove 2 screws (T3x8) to take the fan (FN903) off. Remove 4 screws (T3x8) and take AV Board from the Rear Panel ass’y off.
  • Page 11 Mechanical Disassemblies Optical Unit removal Remove 2 screws (M3x10) and take the Lamp Cable off. Remove 6 screws (T3x10) and take the Optical Unit upward off. Lamp Cable Optical Unit Fig.6 Power Unit and FN901 removal Shield Plate Spacer Sheet Remove 4 screws (T2x4) to take off the spacer sheet and the shield plate on the Power Board.
  • Page 12 Mechanical Disassemblies Lamp Ballast Unit and Filter Board Spacer Sheet removal Lamp ballast Board Remove 1 screw (M4x4) to take the Earth cable off. Remove 2 screws (T3x8) to take the Lamp Ballast Unit and the Filter Board off. Holder Remove 2 screws (T3x6) to take the Lamp Ballast Unit off.
  • Page 13 Mechanical Disassemblies FN902, FN905 and Sensor Board removal Remove 1 screw (T3x8) to take the Duct under the Panel. Remove 1 screw (T3x8) to take the Holder with the Fans(FN902 and FN905) off. Remove 2 screws (T3x10) to take the Fans (FN902 and FN905) off.

  • Page 14: Electrical Parts Location

    * Following information differs from the model LV-S3 ; Mechanical Disassemblies - the cabinet, the control board Electrical Parts Location ● CIRCUIT BOARD Control Board Unit_Power Main Board R/C-A Board Unit_Lamp Ballast Filter Board Sensor Board A/V Board Switch Board ●...

  • Page 15: Connection Around The Main Board

    * Following information differs from the model LV-S3 ; Mechanical Disassemblies - the connection of FN904 and FN906 Connection around the Main Board R/C-A SENSOR "K68D" FN902 FN905 "K88A" MAIN K66A K66B (SIDE: A) K25G POWER "CN202" FN904 FN903 LAMP BALLAST CONTROL "CN300"...

  • Page 16: Optical Parts Disassemblies

    ■ Optical Parts Disassemblies * Following information differs from the model LV-S3 ; - the lamp holder removal Before taking this procedure, remove Cabinet Top, Main Board and Optical Unit following to the “Mechanical Disassemblies”. Lamp Holder removal Lamp Holder Remove 2 screws to take the Lamp Holder off.
  • Page 17 Optical Parts Disassemblies Polarized Glass-In removal Remove each screw to take the polarized glass-in R/G/B off. Polarized glass_Red Polarized glass Note: _Green and Blue The polarized glass-in_red is sticked on the condenser lens_red. So, it cannot be removed separately. Fig.3- Polarized glass_Red Screw Polarized glass_Blue...
  • Page 18 * Following information differs from the model LV-S3 ; Optical Parts Disassemblies - the optical disassemblies on page 18 - 19 Condenser lens Ass'y and Relay lens Ass'y removal Remove 3 screws (M2x4) take the Condenser lens ass'y downward off. Remove 2 screws (M2x4) take the Relay lens ass'y downward off.
  • Page 19 Optical Parts Disassemblies The printed marker comes this side. Rugged surface side come this side. (Integrator lens) Marker comes this side. The printed marker side come this surface Film attached side comes this side. side and top side. (Dichroic mirror) (Prism (PBS)) Film attached side Film attached side...
  • Page 20 * Following information differs from the model LV-S3 ; Optical Parts Disassemblies - added items No.15 - 17 Locations and Directions When the optical parts in the optical unit mounting or assembling, the parts must be mounted in the specified location and direction as shown in figure below.

  • Page 21: Lcd Panel/Prism Ass'y Replacement

    ■ LCD Panel/Prism Ass’y Replacement LCD Panel/Prism Ass'y removal Remove 4 screws to take the Projection Lens off. Projection Lens Panel/Prism Ass'y Fig.1 LCD Panel/Prism Ass'y attachment Tighten 4 screws to fix the Projection Lens securely, making sure that the zoom lever is downside. Note: Do not replace the LCD panel separately otherwise it can not obtain proper picture.

  • Page 22: Adjustments After Parts Replacement

    ■ Adjustments after Parts Replacement ● ❍ : Adjustment necessary : Check necessary Disassembly / Replaced Parts LCD/ Polarized glass Main Optical Power Prism Unit Board Board (✽) Ass’y Contrast Adjustment ❍ ● R-Contrast adjustment ❍ ● G-Contrast Adjustment ❍ ●...

  • Page 23: Optical Adjustments

    ■ Optical Adjustments * Following information differs from the model LV-S3 ; - the top view on page 23 - 25 Before taking optical adjustments below, remove the Cabinet Top and Main Board following to the “Mechanical Disassemblies” Adjustments require a plus screwdriver, 2.0mm hex wrench and a slot screwdriver. Note: Do not disconnect connectors K8A, K8B, K8H, K48K, K48L, K66A, K66B, K66C, K66D, K66E and K66F on the main board, because the projector can not turn on due to operate the power failure protection.
  • Page 24 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-...
  • Page 25 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 2 screws with the 2.0mm hex driver, and White...

  • Page 26: Electrical Adjustments

    ■ Electrical Adjustments * Following information differs from the model LV-S3 ; - the top control ● Service Adjustment Menu Operation To enter the service mode To enter the “Service Mode”, press and hold the MENU and INPUT button on the projector at the same time for more than 3 seconds, or press and hold the MENU button on the remote control unit for more than 20 seconds.

  • Page 27: Circuit Adjustments

    * Following information differs from the model LV-S3 ; Electrical Adjustments - the electrical adjustments on page 27 -29 ● 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.
  • Page 28 Electrical Adjustments Video Gain adjustment 480p Gain adjustment 1. Receive the 16-step gray scale composite video sig- 1. Receive the 16-step gray scale component signal nal with Video [Video] mode. (480p format) with COMPUTER IN [COMPONENT] 2. Enter the service mode. mode.
  • Page 29 Electrical Adjustments Gamma adjustment Common Center adjustment [PC-GAMMA ADJUSTMENT] 1. Receive the 16-step gray scale computer signal with 1. Receive the 100% whole-white computer signal with COMPUTER IN [RGB] mode. COMPUTER IN [RGB] mode. 2. Enter the service mode. 2. Enter the service mode. 3.

  • Page 30: Service Adjustment Data Table

    * Following information differs from the model LV-S3 ; Electrical Adjustments - the service data on page 30 - 33 ● 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 adjustment items indicated with “✻”...
  • Page 31 Electrical Adjustments Initial ItemNo. Name Device YCbCr Video Detail 480i(+) 480p(+) NTSC Note: 480i(+) = 480i & 575i, 480p(+) = 480p & HDTV Shoot Out Mode 0: Normal / 1: Shoot out 1 Forced NOBRAND 0: Normal / 1: NOBRAND Normal / Eco SW 0: Normal / 1: Eco VSBEG...
  • Page 32 Electrical Adjustments Initial ItemNo. Name Device YCbCr Video Detail 480i(+) 480p(+) NTSC Note: 480i(+) = 480i & 575i, 480p(+) = 480p & HDTV Vertical Peaking Gain VPC3230 Note 1 AFC other1 VPC3230 Note 1 AFC other2 VPC3230 Note 1 Horizontal Peaking Filter VPC3230 Note 1 Peaking Gain...
  • Page 33 Electrical Adjustments Initial ItemNo. Name Device YCbCr Video Detail 480i(+) 480p(+) NTSC Note: 480i(+) = 480i & 575i, 480p(+) = 480p & HDTV Position (Horizontal) 1035i PIXEL For Component mode and RGB HDTV 1035i Position (Vertical) 1035i PIXEL Expand Ratio (Vertical) 1080i PIXEL For Component mode and RGB HDTV 1080i Expand Ratio (Horizontal) 1080i...

  • Page 34: Test Points And Locations

    Electrical Adjustments Test Points and Locations ● MAIN BOARD K66A K66B IC9401 IC3571 IC3561 IC401 IC3551 IC501 IC561 TPR1 TPR1 TPB1 TPB1 TP2561 IC531 K25G IC301 IC8201 TP103 TPGHS IC101 TPVHS TE301 IC5302 PART SIDE 1AA4B10C4340A -34-...

  • Page 35: Chassis Block Diagrams

    ■ Chassis Block Diagrams * Following information differs from the model LV-S3 ; - the block diagrams on page 35 - 37 ● Chassis Overview SPEAKER B-LCD PANEL G-LCD PANEL R-LCD PANEL IIC BUS CONTROL BRIDGE DIODE THERMAL D-SUB_15 D-SUB_15 AUDIO -35-...

  • Page 36: Video Signal Processing Circuit And Lcd Panel Driving Circuit

    Chassis Block Diagrams ● Video signal processing circuit and LCD panel driving circuit K25B K25G K25R CBAL_SW K50A K50B 20,19,18 13,12,11 15,14 K10D K10E G_SYNC D-SUB_15 D-SUB_15 COMPUTER IN / MONITOR OUT VIDEO IN S-VIDEO IN / COMPONENT IN -36-...

  • Page 37: System Controls

    Chassis Block Diagrams ● System Controls 1-2 3-4 17-18 13 14 15 IC3561 IC3551 IC1802 IC1801 OUTPUT OUTPUT EXPANDER EXPANDER IC8802 IC3571 TEMP. SENSOR IC8801 IC1881 IC5302 TEMP. INVERTER YUV_SYNC SENSOR IC1811 BUFFER IC1882 LAMP CPU From the power fail detection diodes.

  • Page 38: Power Supply Lines

    ■ Power Supply Lines * Following information differs from the model LV-S3 ; - added FAN4 control and ON_3.3V ● Power supply circuit, Protection circuit and Fan control circuit K25B K25G K25R Fan Error : L Lamp-On: H D5619 FAN4 D5624 FAN3 D5620...

  • Page 39: Troubleshooting

    ■ Troubleshooting * Following information differs from the model LV-S3 ; - added ON_3.3V signal ● No Power This projector provides a function which can be specified a defective area simply by indicating the LEDs on the con- trol panel. Connect the AC cord and press the Power button once and then check the LED indication. - When all the LED indicators are not lighting, the symptom indicates that the primary power supply circuit does not operate properly.

  • Page 40: No Picture

    * Following information differs from the model LV-S3 ; Troubleshooting - S-video input source ● No Picture Check following steps. Check signal processing stage and LCD driving stage; No picture with all of Check RGB S&H signals at test points TPR1, TPG1, TPB1. input sources Check NRS signals at test points TP2531 and TP2561.

  • Page 41: No Sound

    * Following information differs from the model LV-S3 ; Troubleshooting - the audio terminal function ● No Sound Check following steps. audio signal Check Audio control and pre-amp. circuit. observed at pins 1 and 7 Check IC5001(audio-control IC), IC5002(audio pre-amp IC) and of IC5002? peripheral circuit.

  • Page 42: Control Port Functions

    ■ Control Port Functions ● System Control & I/O Port Table (IC301) Pin No. Name Function Name Function Polarity Port A7 LAMP_PWM PWM Output to Sub-CPU Port A6 MUPO_ON Port A5 M_SCL1 Port A4 M_SDA1 Port A3 M_SCL2 Port A2 M_SDA2 Port A1 SCLK...
  • Page 43 * Following information differs from the model LV-S3 ; Control Port Functions - FAN_CONT4 of IC3561 Pin No. Name Function Name Function Polarity ROMOE ROMOE ROM Output Enable for Flash ROM ROMWE ROMWE ROM Write Enable for Flash ROM RAMOE RAMOE RAM Output Enable Not used...
  • Page 44 Control Port Functions ● IIC Bus D/A Converter (IC3571, M62392FP) Port Functions Pin No. Name Function Reset input P_SCK2 IIC BUS SCL P_SDA2 IIC BUS SDA Not used Not used Not used Not used Not used Not used VrefL DAC Lower Reference Voltage input VrefU1 DAC Upper Reference Voltage input (CH5~CH8) VrefU2...
  • Page 45 * Following information differs from the model LV-S3 ; Control Port Functions - pin 9 of IC1811 ● Output Expander (IC1802, TC74LCX574FT) Port Functions Pin No. Name Function IO_ENB ADD1_CS Output Port Chip Select Enable = L ON_3.3V 3.3V OFF at standby mode TURBO_ST Strobe for Turbo (IC9401) SH_B_ST...

  • Page 46: Waveforms

    ■ Waveforms VIDEO-IN <TP103, IC101-75> Analog H-SYNC <TPGHS> Analog V-SYNC <TPGVS> Digital H-SYNC <TPDHS> Digital V-SYNC <TPDVS> NRS <TP2531,TP2561> R-S&H OUT <TPR1> G-S&H OUT <TPG1> B-S&H OUT <TPB1> -46-...

  • Page 47: Cleaning

    ■ 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.

  • Page 48: Ic Block Diagrams

    ■ IC Block Diagrams ● AD9883AKST <Analog Flat Panel Interface, IC8201> CLAMP OUTA CLAMP OUTA CLAMP OUTA MIDSCV HSYNC DTACK SYNC COAST PROCESSING HSOUT AND CLOCK CLAMP VSOUT GENERATION SOGOUT FILT BYPASS SERIAL REGISTER AD9883A POWER MANAGEMENT ● AN5870SB <RGB SW, G_Sync Separator, IC5201> -48-...
  • Page 49 IC Block Diagrams ● BA7078AF <Sync Detector, IC5301> ● BA9743AFV <DC-DC Converter, > IC371 -49-...
  • Page 50 IC Block Diagrams ● LM4865 <Audio Amplifier , IC5003> ● PW168A <Scaler, Main CPU, IC301> -50-...
  • Page 51 IC Block Diagrams ● TA1370FG <Sync Separator, Frequency Counter, IC5302> ● VPC3230D <Video Decoder, IC101> -51-...
  • Page 52 SERVICE MANUAL LV-S4U, LV-S4E...

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