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Sanyo DP26640 Troubleshooting Manual

2010 models
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TROUBLESHOOTING GUIDE

This guide is divided into 4 sections/pages depending on type of defect:
page 1) No Green LED Power Light (LED never turns "ON")
page 2) Green LED Light is "ON", but Backlights are not "ON", or only turn "ON &
then OFF".
page 3) Green LED Light is "ON", and Backlights are "ON", but there is no video/OSD.
page 4) Green LED Light turns "ON", but turns "OFF" within 10 seconds, or LED cycles
ON & OFF.
Please select the section/page that matches your defect and follow the flow chart.
These models & chassis versions are in this guide:
DP26640-00
DP26640-01
DP26640-02
DP26640-04
DP32640-00
DP32640-01
DP32640-03
IT WILL NOT BE PROVIDED FOR EVERY REPAIR.
techsupport@sanyotv.com
SANYO
2010 MODELS
DP26640 & DP32640
PLEASE KEEP THIS GUIDE.
12/08/10
2010-2A

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  Summary of Contents for Sanyo DP26640

  • Page 1: Troubleshooting Guide

    SANYO TROUBLESHOOTING GUIDE 2010 MODELS DP26640 & DP32640 This guide is divided into 4 sections/pages depending on type of defect: page 1) No Green LED Power Light (LED never turns “ON”) page 2) Green LED Light is “ON”, but Backlights are not “ON”, or only turn “ON &...
  • Page 2 Replace "Key Switch Assy." Main Bd. is not working. Replace "Main Bd" (TABLE *1.0) Main Bd.: 5V_STBY Test Points 5V_STBY on Main Bd. Confirmation Voltage 26" Models 32" Models Main K8C "pin 4" DP26640-00 N8ME DP32640-00 N8LE DP26640-01 N8MF DP32640-01 N8LF DP26640-02...
  • Page 3 If Inverter Bd. does not correct problem, then: 2nd: Replace "LCD Panel" (TABLE *1.0) 12V Test Points 12V on Main Bd. Confirmation Voltage 26" Models 32" Models Main K8C "pin 8" 12 V DP26640-00 N8ME DP32640-00 N8LE DP26640-01 N8MF DP32640-01 N8LF DP26640-02...
  • Page 4 2nd: Replace "LCD Panel" (TABLE *1.0) Main Bd.: 12V Test Points 12V on Main Bd. Confirmation Voltage 26" Models 32" Models Main K8C "pin 8" 12 V DP26640-00 N8ME DP32640-00 N8LE DP26640-01 N8MF DP32640-01 N8LF DP26640-02 N8MG...
  • Page 5 Main Bd. is not working. Replace "Power Bd." Replace "Main Bd." (TABLE *1.0) Main Bd.: "Power ON/OFF SW" Test Points 5V on Main Bd. Confirmation Voltage 26" Models 32" Models Main K8C "pin 1" DP26640-00 N8ME DP32640-00 N8LE DP26640-01 N8MF DP32640-01 N8LF DP26640-02...
  • Page 6: Table Of Contents

    HEIGHT ....... 484mm DEPTH INCLUDING BASE ....241mm DP26640, N8ME, PRODUCT CODE 113023504 REFERENCE No. SM780167...
  • Page 7: Safety Instructions

    SAFETY INSTRUCTIONS SAFETY PRECAUTIONS WARNING: The chassis of this receiver has a floating ground with the potential of one half the AC line voltage in respect to earth ground. Service should not be attempted by anyone not familiar with the precautions necessary when working on this type of equipment.
  • Page 8: Service Adjustments

    SERVICE ADJUSTMENTS GENERAL This set has an On-screen Service Menu system included – : Volume in the CPU that allows remote operation for most of the Enter Service Menu service adjustments. ON-SCREEN SERVICE MENU SYSTEM 1. Enter the Service Menu: •...
  • Page 9: On-Screen Service Menu

    ON-SCREEN SERVICE MENU Table 1. ON-SCREEN SERVICE MENU When IC803 (EEPROM) is replaced, check the bus data to confirm they are the same as below. See page 3 for On-Screen Service Menu access and adjustments. Title Initial Data Note MUTE Audio mute at Power ON Volume setup inspection Option 1 Data (TV Guide/HOTEL mode)
  • Page 10: Power Failure Circuit

    POWER FAILURE CIRCUIT Check the following if the unit is turned off by the power SUB-CPU (IC800) is programmed so the set will go to stand- failure detector. by mode when there is circuit failure as described below. (Refer to“Block Diagram Power Lines”.) 1.
  • Page 11: Mechanical Disassembly

    MECHANICAL DISASSEMBLY CAUTION: This LCD TV uses several different kinds of screws. Using the correct screw is necessary to prevent damage. Lead wires must be redressed to their previous locations after servicing. STAND REMOVAL Position TV face down on a padded or cushioned surface to protect the screen and finish.
  • Page 12: Lcd Panel Removal

    ELECTROSTATICALLY SENSITIVE DEVICES Many solid-state devices (especially Integrated Circuits) are Electrostatically Sensitive, and, therefore, require special handling techniques as described under “Servicing Electrostatically Sensitive Devices,” on page two in this service literature. Mounting Wall Wire LCD PANEL REMOVAL Lift up the LCD panel from front cabinet. SPEAKER REMOVAL Take off each speaker from back cabinet.
  • Page 13: Chassis Electrical Parts List

    CHASSIS ELECTRICAL PARTS LIST CAUTION: To Protect against electrical shock and for continued product safety, refer to SAFETY PRECAUTIONS and PRODUCT SAFETY NOTICE on Page 2. PRODUCT SAFETY NOTICE PRODUCT SAFETY SHOULD BE CONSIDERED WHEN A REPLACEMENT IS MADE IN ANY AREA OF A RECEIVER. COMPONENTS INDICATED BY A IN THIS PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATE COMPONENTS IN WHICH SAFETY CAN BE OF SPECIAL SIGNIFICANCE.
  • Page 14 Schematic Schematic Part No. Part No. Description Description Location Location C C A A P P A A C C I I T T O O R R S S C1620 CK0J106KGMBNG CERAMIC 10U K 6.3V C1622 CEXLB0J221VEN ELECT 220U M 6.3V C016 CK1E105KGMBNG...
  • Page 15 Schematic Schematic Part No. Part No. Description Description Location Location C5530 CK1A105KLZBNG CERAMIC 1U K C5596 CK1H103KLZBNG CERAMIC 0.01U K C5597 CK1E224KLZBNG CERAMIC 0.22U K C5531 CK1A105KLZBNG CERAMIC 1U K C5598 CK1E224KLZBNG CERAMIC 0.22U K C5532 CC1H471JLZCNG CERAMIC 470P J C5533 CC1H471JLZCNG CERAMIC...
  • Page 16 Schematic Schematic Part No. Part No. Description Description Location Location C5804 CC1H270JLZCNG CERAMIC 27P J SC1000 CC1H150JLZCNG CERAMIC 15P J C5805 CC1H270JLZCNG CERAMIC 27P J SC1001 CC1H150JLZCNG CERAMIC 15P J C5806 CC1H150JLZCNG CERAMIC 15P J SC1003 CC1H150JLZCNG CERAMIC 15P J C5807 CC1H150JLZCNG CERAMIC...
  • Page 17 Schematic Schematic Part No. Part No. Description Description Location Location IC2445 Q74AHC1G08GWP IC 74AHC1G08GW L5510 1AV4L2FB3R3MG “INDUCTOR,3.3U M” QTC7SH08FU—P IC TC7SH08FU(TE85L) L5511 1AV4L2FB3R3MG “INDUCTOR,3.3U M” IC5500 QXXAVD108—-M IC ZR39772HGCF-B L5512 RGFR000ZTAANL MT-GLAZE 0.000 ZA 1/10W IC5700 QXXAVD132—-M IC H5PS5162FFR-25C L5513 RGFR000ZTAANL MT-GLAZE 0.000 ZA 1/10W L5514...
  • Page 18 Schematic Schematic Part No. Part No. Description Description Location Location TUM6K1N——-P TR UM6K1N-TN TXXLBB006—-P TR MMBTSC3928R Q1004 T2SC3928A1R-P TR 2SC3928A1R R R E E S S I I S S T T O O R R S S T2SC3928A1S-P TR 2SC3928A1S R009 RGF2201JTCANL MT-GLAZE...
  • Page 19 Schematic Schematic Part No. Part No. Description Description Location Location R867 RGFR000ZTCANL MT-GLAZE 0.000 ZA 1/10W R1054 RGF1000JTCANL MT-GLAZE 100 JA 1/10W R868 RGF1000JTCANL MT-GLAZE 100 JA 1/10W R1055 RGF1000JTCANL MT-GLAZE 100 JA 1/10W R871 RGF4701JTCANL MT-GLAZE 4.7K JA 1/10W R1056 RGF1000JTCANL MT-GLAZE...
  • Page 20 Schematic Schematic Part No. Part No. Description Description Location Location R2440 RGFR000ZTCANL MT-GLAZE 0.000 ZA 1/10W R5571 RGFR000ZTCANL MT-GLAZE 0.000 ZA 1/10W R2442 RGF1000JTCANL MT-GLAZE 100 JA 1/10W R5573 RGF4701JTCANL MT-GLAZE 4.7K JA 1/10W R2447 RGFR000ZTCANL MT-GLAZE 0.000 ZA 1/10W R5574 RGF4701JTCANL MT-GLAZE...
  • Page 21 Schematic Schematic Part No. Part No. Description Description Location Location R5661 RGF75R0JTCANL MT-GLAZE 75 JA 1/10W R6271 RGF4701JTCANL MT-GLAZE 4.7K JA 1/10W R5662 RGF10R0JTCANL MT-GLAZE 10 JA 1/10W R6272 RGF5601JTCANL MT-GLAZE 5.6K JA 1/10W R5663 RGF10R0JTCANL MT-GLAZE 10 JA 1/10W R6273 RGF2202JTCANL MT-GLAZE...
  • Page 22 Schematic Schematic Part No. Part No. Description Description Location Location R6566 RGF4R70JTCANL MT-GLAZE 4.7 JA 1/10W R6567 RGF4R70JTCANL MT-GLAZE 4.7 JA 1/10W R6568 RGF2201JTCANL MT-GLAZE 2.2K JA 1/10W R6571 RGF2201JTCANL MT-GLAZE 2.2K JA 1/10W R6600 RGFR000ZTCANL MT-GLAZE 0.000 ZA 1/10W R6602 RGF4701JTCANL MT-GLAZE...
  • Page 23 Schematic Schematic Part No. Part No. Description Description Location Location M M I I S S C C E E L L L L A A N N E E O O U U S S P P O O W W E E R R B B O O A A R R D D A001 1AA0B10N271C0 “ASSY,PWB,MAIN_Z-N8ME”...
  • Page 24: Component And Testpoint Locations

    COMPONENT AND TESTPOINT LOCATIONS MAIN BOARD PARTS SIDE C1609 R1615 R1617 R1600 R1614 Q1610 C1616 R1605 R1640 C1601 C1605 CL14 CL03 IC1600 C1641 Q1695 R1643 R1702 C1645 C1674 C1607 C1644 L1725 IC1640 C1000 C1640 L1706 D1640 Q5803 L1711 R5818 L1710 D1641 L1708 C6304...
  • Page 25 MAIN BOARD SOLDER SIDE R1602 C1600 C1700 C1603 R1705 R1601 R1706 C1604 R1002 R1603 D1701 SC1001 R1697 R1604 R1642 R1641 R1696 R1644 D1670 C1607 R1009 D1696 C1674 R1645 C1606 C1646 R5834 C5812 D1695 C1642 C1608 C5813 R1687 R5832 R5829 C1670 R1688 R5833 L1601...
  • Page 26 CONTROL BOARD PART SIDE SW1902 SW1902A SW1901 SW1903 SW1904 SW1905 SW1906 SW1907 SW1901A MENU SW1903A SW1904A SW1905A SW1906A SW1907A POWER INPUT VOL.+ VOL.- CH.+ CH.- K19CTRB L1901 (3PIN) PWB,KEY_SW N7AL K19K 1AA4B10N2460A_ A K19CTRA K19CTR (3PIN) A30C5 (8PIN) SIDE SIDE CONTROL BOARD SOLDER SIDE SW1901A SW1901...
  • Page 27: Block Diagram Power Lines

    BLOCK DIAGRAM POWER LINES – 22 –...
  • Page 28: Block Diagram Signal Lines

    BLOCK DIAGRAM SIGNAL LINES – 23 –...
  • Page 29: Ic Block Diagrams

    IC BLOCK DIAGRAMS IC001, Audio AMP – 24 –...
  • Page 30 IC BLOCK DIAGRAMS (CONT.) IC1670 Voltage Regulator IC803 EEPROM – 25 –...
  • Page 31 IC1680 DC to DC Regulator IC1600, DC to DC Converter – 26 –...
  • Page 32 IC BLOCK DIAGRAMS (CONT.) IC5500 Video Processing – 27 –...
  • Page 33 IC6270, Low output Amplifier IC6600, USB protection – 28 –...
  • Page 34 IC BLOCK DIAGRAMS (CONT.) IC5700, DDR: Double Data Rate SDRAM – 29 –...
  • Page 35: Troubleshooting Flow Charts

    TROUBLESHOOTING FLOW CHARTS NO POWER Check: Power Unit fuse open? the voltage Check: Power Unit to "5V_STBY" line supplied? All 0V (except '5V_STBY' line) the voltage to all lines Check: arround supplied? CPU (IC800), IC (IC803), Crystal (X801), Power Unit (or the voltage to some lines is not supplied.) After a few seconds, the set will be switched off.
  • Page 36 TROUBLESHOOTING FLOW CHARTS (continued) NO AUDIO Is there Check: All Modes ? signal at speaker Speaker (SP901, SP902) terminal ? Is there Check: signal at IC001 7pin (L) Line: IC001 1pin - IC800 (CPU) 22pin (Mute) or 3pin (R) ? Parts: Around IC001 (Audio AMP.) Check: Parts: Around IC6270 (Audio Control)
  • Page 37 TROUBLESHOOTING FLOW CHARTS (continued) NO VIDEO Check: RF(TV) ,Digital(TV) All Inputs? Line: A6100 21pin - IC5500 AE2pin A6100 20pin - IC5500 AF2pin only Parts: Around A6100 (TU_IF), IC5500 Check: AV1 only Line: Terminal(CV) - Q5800,5803 - IC5500 AA3pin Terminal(Y) - Q5801,5804 - IC5500 U3pin Terminal(C) - Q5802,5805 - IC5500 V3pin Parts: Around IC5500 Check:...
  • Page 38: Control Port Functions

    CONTROL PORT FUNCTIONS System Control (SUB CPU : 801) IC specification Assignment Explanation P12/SCK0 REG SW4 REG SW4 (ON : High OFF : Low) P13/SO1 REG SW5 no use (REG SW5) P14/SI1/SB1 IIC-BUS for NV Data of IIC Bus Active ‘L’ for IIC data NV P15/SCK1 IIC-BUS for NV Clock of IIC Bus Active ‘L’...
  • Page 39 IC specification Assignment Explanation P72/INT2/T0IN CEC output no use (CEC output) P73/INT3/T0IN Rcin Remote control signal input RESET in CPU Reset input RESET : Low (and for on-board write) 32.678KHz X’tal input (for clock timer) Xout 32.678KHz X’tal output (for clock timer) VSS1 GND (0Vdc) CF1/AN12...
  • Page 40: Zoran 772 Periphericals

    Zoran 772 Periphericals DDR2 Nand Flash 512Mbit (128Mbit) (400MHz) (D -Sub) Vi deo2 (Component) MPEG2 DEMUX Video Decode Vi deo3 (Component) RS -232C HD MI1 (or DVI) Clock HDMI Sca ler HD MI2 (25MHz) (MIPS) (or DVI) RE SE T NTSC Audi o Pr oc essing...
  • Page 41: Schematic Notes

    SCHEMATIC NOTES NOTES ON SCHEMATIC DIAGRAMS 1. All resistance values in ohms K=1,000 M=1,000,000. 2. Resistors specified with resistance value are “1/6DJ.” 3. Resistors specified with type of resistor, tolerance and resistance value are “1/4.” 4. Unless otherwise noted on schematic, all capacitor values less than 1 are expressed in μF (Micro Farad), and the values more than 1 are in pF.
  • Page 42: Ic, Diode, And Transistor Pin Layouts

    IC, DIODE, AND TRANSISTOR PIN LAYOUTS – 37 –...
  • Page 43: Pc Board Connections And Locations

    PC BOARD CONNECTIONS AND LOCATIONS – 38 –...
  • Page 44: Capacitor And Resistor Code Chart

    S ......Oxide Metalized Y ......Wire Wound C ......Solid D ......Carbon Film W ......Wire Wound For parts or service contact Sanyo Manufacturing Corporation P.O. Box 2000 3333 Sanyo Road Forrest City, Arkansas 72335-2000 March 2010 SMC Published in Mexico.
  • Page 45: Schematic Diagrams

    MODEL DP26640 Chassis No. P26640-00 SCHEMATIC DIAGRAMS J10EA043N ELECTROSTATICALLY SENSITIVE DEVICES Many solid-state devices (especially Integrated Circuits) are Electrostatically R1601 R1603 R1604 Sensitive, and, therefore, require special handling techniques as described under C1609 R1602 “Servicing Electrostatically Sensitive Devices,” on page two in this service literature.
  • Page 46 MODEL DP26640 Chassis No. P26640-00 SCHEMATIC DIAGRAMS HS_DET R2449 *IC2445 TC7SH08FUP R2448 L2400 R2447 :74AHC1G08GWP 1/10 1/10GJ 1/10GZ0C 100C GZ0.0 H_SYNC 5V_STBY R6329 L6270 *IC2440 1/10GZ0.0 R6271 R6330 C2445 TC7SH08FUP 1/10GJ4.7KC KZ0.1LZF :74AHC1G08GWP R6272 C6302 LVDS_POW 1/10GJ5.6KC (TO TV_CPU 29pin) V_SYNC KZ0.1LZF...