FUNAI LH8-M40BB Service Manual

40" color lcd television

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SERVICE MANUAL

This Service Manual is for the

LH8-M40BB (A03P0EP) / LT8-M40BB (A03P1EP) model.

For the LH8-M40BB (A03P0EP) / LT8-M40BB (A03P1EP) model, the letter

(A03P0EP) / (A03P1EP) is printed on the Serial Number Label on the back

of the unit. Refer to the Serial Number Label below.

Serial No. Label

"A03P0EP"

"A03P1EP"

40" COLOR LCD TELEVISION

LH8-M40BB / LT8-M40BB

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Summary of Contents for FUNAI LH8-M40BB

Page 1: Service Manual
This Service Manual is for the LH8-M40BB (A03P0EP) / LT8-M40BB (A03P1EP) model. For the LH8-M40BB (A03P0EP) / LT8-M40BB (A03P1EP) model, the letter (A03P0EP) / (A03P1EP) is printed on the Serial Number Label on the back of the unit. Refer to the Serial Number Label below.
Page 2: Table Of Contents
40″ COLOR LCD TELEVISION LH8-M40BB / LT8-M40BB TABLE OF CONTENTS Specifications ................1-1 Important Safety Precautions.
Page 3: Specifications
SPECIFICATIONS < TUNER > VHS/UHF Input ----------- 75Ω unbal., IEC Connector Center IF ------------------- SECAM-L 38.9MHz, SECAM-L’ 33.9MHz Description Condition Unit Nominal Limit 1. Video S/N 2. Audio S/N 40/40 < LCD PANEL > Description Condition Unit Nominal Limit Horizontal pixels 1920 1.
Page 4 < AUDIO > All items are measured across 8 Ω load at speaker output terminal. Description Condition Unit Nominal Limit 1. Audio Output Power 10% THD: Lch/Rch 10.0/10.0 8.0/8.0 2. Audio Distortion 500mW: Lch/Rch 1.5/1.5 3.0/3.0 -6dB: Lch 70 to 10 k 3.
Page 5: Important Safety Precautions
IMPORTANT SAFETY PRECAUTIONS Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.
Page 6 4. Hot Chassis Warning - 7. Product Safety Notice - Some electrical and mechanical parts have special safety-related a. Some TV receiver chassis are electrically characteristics which are often not evident from connected directly to one conductor of the AC visual inspection, nor can the protection they give power cord and maybe safety-serviced without necessarily be obtained by replacing them with...
Page 7 Precautions during Servicing A. Parts identified by the ! symbol are critical for safety. Replace only with part number specified. B. In addition to safety, other parts and assemblies are specified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements.
Page 8 Safety Check after Servicing Examine the area surrounding the repaired location Chassis or Secondary Conductor for damage or deterioration. Observe that screws, parts and wires have been returned to original posi- tions. Afterwards, perform the following tests and con- Primary Circuit firm the specified values in order to verify compliance with safety standards.
Page 9: Standard Notes For Servicing
STANDARD NOTES FOR SERVICING Circuit Board Indications How to Remove / Install Flat Pack-IC 1. The output pin of the 3 pin Regulator ICs is 1. Removal indicated as shown. With Hot-Air Flat Pack-IC Desoldering Machine: 1. Prepare the hot-air flat pack-IC desoldering Top View Bottom View machine, then apply hot air to the Flat Pack-IC...
Page 10 With Soldering Iron: With Iron Wire: 1. Using desoldering braid, remove the solder from 1. Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, flux which is applied to all pins of the flat pack-IC, you can remove it easily.
Page 11 2. Installation Instructions for Handling Semi- conductors 1. Using desoldering braid, remove the solder from the foil of each pin of the flat pack-IC on the CBA Electrostatic breakdown of the semi-conductors may so you can install a replacement flat pack-IC more occur due to a potential difference caused by easily.
Page 12: Cabinet Disassembly Instructions
CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart Removal Step/ Remove/*Unhook/ This flowchart indicates the disassembly steps for the Loc. Part Fig. Unlock/Release/ cabinet parts, and the CBA in order to gain access to Note Unplug/Unclamp/ item(s) to be serviced. When reassembling, follow the Desolder steps in reverse order.
Page 13 Note: N = Nut, L = Locking Tab, S = Screw, H = Hex Screw, CN = Connector (1) Order of steps in procedure. When reassembling, * = Unhook, Unlock, Release, Unplug, or Desolder follow the steps in reverse order. These numbers e.g.
Page 14 Function Knob Knob Frame [9] Function CBA (S-10) (S-10) [6] Speaker [7] Junction CBA [6] Speaker [5] Speaker Holder [8] IR Sensor (S-11) Fig. D2 [10] Jack Holder(HP) (S-12) (S-13) [11] Jack CBA (S-14) [12] Inverter Power CBA Fig. D3 A03P0DC...
Page 15 [18] PCB Holder (S-20) [16] Shield Box [15] Jack Holder (S-17) (S-18) (S-18) (H-1) (S-15) (S-20) (S-19) (S-15) (S-18) (S-20) [13] Tuner Shield [17] Digital Main CBA Unit (S-18) (S-16) (S-16) [14] Power Supply CBA (S-16) Fig. D4 A03P0DC...
Page 16 (S-26) [22] LCD Module [23] Front Cabinet Assembly (S-24) [21] Wall Mount Bracket(R) (S-25) [21] Wall Mount Bracket(L) (S-24) [19] AC Inlet Holder (S-25) (S-22) (S-21) (S-22) (S-23) (S-25) (S-23) [20] Stand Bracket (S-26) Fig. D5 A03P0DC...
Page 17 3. TV Cable Wiring Diagram To LCD To LCD Module Module Assembly Assembly Power Supply CBA Inverter Power CBA CN3711 CN3903 CN452 CN402 CN3701 CN1851 CN1852 CN404 CN3702 CN453 CN403 CN3703 CN1810 CN1801 CN610 CN401 CN600 CN3704 Digital Main CL202B CBA Unit CN601 CN802...
Page 18: Electrical Adjustment Instructions
ELECTRICAL ADJUSTMENT INSTRUCTIONS 1. Purity Check Mode General Note: “CBA” is abbreviation for “Circuit Board Assembly.” This mode cycles through full-screen displays of red, Note: Electrical adjustments are required after green, blue, and white to check for non-active pixels. replacing circuit components and certain 1.
Page 19 2. Auto Calibration [Component] 3. Auto Calibration [PC] Purpose: To bring the color adjustment of each Purpose: To bring the color adjustment of PC into component into standard alignment. standard alignment. Symptom of Misadjustment: If this adjustment is Symptom of Misadjustment: If this adjustment is incorrect, component signals do not reproduce the incorrect, PC signals do not reproduce the corresponding color.
Page 20: White Balance Adjustment
The White Balance Adjustment should be 4. Enter the Service mode. Press [ -] button on the service remote control unit and select “C/D” mode. performed when replacing the LCD Panel 5. [CUTOFF] or Digital CBA. Press [3] button to select “COB” for Blue Cutoff 4.
Page 21: How To Initialize The Lcd Television
HOW TO INITIALIZE THE LCD TELEVISION How to initialize the LCD television: 1. Turn the power on. 2. To enter the service mode, press the service button on the service remote control unit. (Refer to page 5-1.) - To cancel the service mode, Press [ ] button on the remote control unit.
Page 22: Firmware Renewal Mode
FIRMWARE RENEWAL MODE Equipment Required 9. When the firmware update is completed, the following will appear on the screen. a. USB storage device (Example) b. Remote Control Unit Firmware Update Procedure [Preparation] 1. Prepare a blank USB storage device. 2. Copy “pkg” file (example: funai_LC7_WHD_ ZF536232PB10S-001.pkg) to USB storage device.
Page 23: Troubleshooting
TROUBLESHOOTING FLOW CHART NO.1 The power cannot be turned on. See FLOW CHART No.2 <The fuse blows out.> Is the fuse (F601) normal? Check if there is any leak or short-circuiting on the primary circuit component, and service it if defective. (IC607, IC621, Q621, Q622, Q623, D609, D610, D611, D612, T601, T602) Is approximately 15V voltage supplied to the cathode...
Page 24 FLOW CHART NO.5 LCD+12V is not output. Check D504, D505, C503 and their periphery circuit, and service it defective. Check Q504, Q505, D501, P-ON-H1 line and their periphery circuit, and service it defective. FLOW CHART NO.6 AL+3.3V is not output. Is approximately 6V voltage supplied to the collector Check D525, D527, D528, C516 and their periphery of Q521?
Page 25 FLOW CHART NO.9 AL+5V is not output. Check if there is any leak or short-circuit on the loaded circuit, and service it if defective. FLOW CHART NO.10 P-ON+3.3V is not output. Replace Q510. FLOW CHART NO.11 P-ON+9V is not output. Is approximately 10V voltage supplied to the base of Q517? Replace Q517.
Page 26 FLOW CHART NO.13 No operation is possible from the remote control unit. Check AL+3.3V line and service it if defective. Replace the RS102 (remote control receiver) or remote control unit. Check the line between Pin(1) of RS102 (remote control receiver) and Pin(13) of CN403, and service it if defective.
Page 27 FLOW CHART NO.15 Picture does not appear normally. (Tuner input (Digital)) Check the line between Pin(16, 18) of CN403 and Are the DIF signals outputted to Pin(16, 18) of CN403? Pin(4, 5) of TU1, and TU1(Tuner Unit), and service it if defective.
Page 28: Block Diagrams
BLOCK DIAGRAMS System Control Block Diagram A03P0BLS...
Page 29 Video Block Diagram A03P0BLV...
Page 30 Audio Block Diagram A03P0BLA...
Page 31 Digital Signal Process Block Diagram A03P0BLD...
Page 32 Inverter Power Block Diagram A03P0BLINV...
Page 33 Power Supply Block Diagram A03P0BLP...
Page 34: Schematic Diagrams / Cba And Test Points
SCHEMATIC DIAGRAMS / CBA AND TEST POINTS Standard Notes WARNING Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc.
Page 35 LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE. 2. CAUTION: Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown, first check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply.
Page 36 Power Supply 1 Schematic Diagram CAUTION ! NOTE: CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using For continued protection against fire hazard, If Main Fuse (F601) is blown , check to see that all components in the power supply hot GND as a common terminal.
Page 37 Power Supply 2 Schematic Diagram 10-4 A03P0SCP2...
Page 38 Power Supply 3 & Jack Schematic Diagram Comparison Chart of Models and Marks Model Mark LH8-M40BB LT8-M40BB 10-5 A03P0SCP3...
Page 39 Inverter Power Schematic Diagram NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. 10-6 A03P0SCINP...
Page 40 IR Sensor, Function & Junction Schematic Diagram 10-7 A03P0SCIRF...
Page 41 The order of pins shown in this diagram is different from that of actual IC3301. Model Mark IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. LH8-M40BB LT8-M40BB 10-8 A03P0SCD1...
Page 42 The order of pins shown in this diagram is different from that of actual IC3301. Model Mark IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. LH8-M40BB LT8-M40BB 10-9 A03P0SCD2...
Page 43 The order of pins shown in this diagram is different from that of actual IC3301. Model Mark IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. LH8-M40BB LT8-M40BB 10-10 A03P0SCD3...
Page 44 Digital Main 4 Schematic Diagram 10-11 A03P0SCD4...
Page 45 The order of pins shown in this diagram is different from that of actual IC3301. Model Mark IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. LH8-M40BB LT8-M40BB 10-12 A03P0SCD5...
Page 46 The order of pins shown in this diagram is different from that of actual IC3301. Model Mark IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. LH8-M40BB LT8-M40BB A03P0SCD6 10-13...
Page 47 The order of pins shown in this diagram is different from that of actual IC3301. IC3301 is divided into six and shown as IC3301 (1/6) ~ IC3301 (6/6) in this Digital Main Schematic Diagram Section. Model Mark LH8-M40BB LT8-M40BB A03P0SCD7 10-14...
Page 48 Power Supply CBA & Jack CBA Top View CAUTION ! NOTE: Because a hot chassis ground is present in the power supply Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using circuit, an isolation transformer must be used when repairing.
Page 49 Power Supply CBA & Jack CBA Bottom View CAUTION ! CAUTION ! Because a hot chassis ground is present in the power supply For continued protection against fire hazard, Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. circuit, an isolation transformer must be used when repairing.
Page 50 Inverter Power CBA, Function CBA, IR Sensor CBA & Junction CBA Top View Because a hot chassis ground is present in the power supply NOTE: circuit, an isolation transformer must be used when repairing. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input slowly, hot GND as a common terminal.
Page 51 Inverter Power CBA, Function CBA, IR Sensor CBA & Junction CBA Bottom View Because a hot chassis ground is present in the power supply NOTE: circuit, an isolation transformer must be used when repairing. The voltage for parts in hot circuit is measured using Also, in order to have the ability to increase the input slowly, hot GND as a common terminal.
Page 52: Waveforms
WAVEFORMS WF1 ~ WF6 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 2 of CN404 Pin 8 of CN404 20µs VIDEO-Y 0.2V 20µs VIDEO 0.2V 20µs Pin 27 of CN401 Pin 6 of CN404...
Page 53 WF7 ~ WF10 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 22 of CN401 Pin 26 of CN404 WF10 AUDIO(L) 0.5V 0.5ms VIDEO-R 0.5V 20µs Pin 29 of CN404 VIDEO-B 0.5V...
Page 54: Wiring Diagram
WIRING DIAGRAMS A03P0WI 12-1...
Page 55: Exploded View
EXPLODED VIEWS Cabinet CL3903 CL1852 CL452 Power Supply CBA CL402 CL404 Function CBA CL403 X3301 CL401 CL802 Digital Main CBA Unit CL103A CL453 CL201A X803 SP802 Jack CBA CL801 SP801 LCD-1 Junction CBA CL102A IR Sensor CBA CL601 Inverter Power CBA See Electrical Parts List for parts with this mark.
Page 56 Packing Some Ref. Numbers are not in sequence. Stand Cover Assembly Packing Tape Tape AC601 Packing Tape Packing Tape F R O F R O PP Band 13-2 A03P0PEX...
Page 57: Mechanical Parts List
SET BAG A03P0EP 1EM327238 Comparison Chart of Models and Marks STAND BAG A91H2UH 1EM428517 ACCESSORY Model Mark REMOTE CONTROL NF036RD 170/ NF036RD LH8-M40BB ECPLC6.501/NF036 LT8-M40BB Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. RATING LABEL A03P0EP...
Page 58: Electrical Parts List
C214 CHIP CERAMIC CAP .(1608) CH J 100pF/ CHD1JJ3CH101 Model Mark C215 CHIP CERAMIC CAP .(1608) CH J 100pF/ CHD1JJ3CH101 LH8-M40BB LT8-M40BB C216 CHIP CERAMIC CAP . CH J 330pF/50V CHD1JJ3CH331 C217 CHIP CERAMIC CAP . CH J 330pF/50V CHD1JJ3CH331...
Page 59 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. C403 CHIP CERAMIC CAP .(1608) F Z 0.1µF/ CHD1EZ30F104 C607 CERAMIC CAP . B K 0.01µF/500V CCD2JKP0B103 C608! CAP CERAMIC 680pF/250V KX or CA2E681MR100 C404 CHIP CERAMIC CAP .(1608) F Z 0.1µF/ CHD1EZ30F104 SAFETY CAP .
Page 60 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. C833 CHIP CERAMIC CAP .(1608) CH J CHD1JJ3CH102 D303 DIODE ZENER 5V6BSB-T26 or NDTB5R6BST26 1000pF/50V DIODE ZENER HZS5.6NB2TE-EQ QDTB0HZS5R6N C835 CHIP CERAMIC CAP .(1608) CH J 100pF/ CHD1JJ3CH101 D304 DIODE ZENER 5V6BSB-T26 or NDTB5R6BST26...
Page 61 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. D516 DIODE ZENER 1ZB43BB NDWZ0001ZB43 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F D520 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D609 DIODE 1N5408-B/P or NDLZ001N5408 DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 DIODE RECTIFIEY 1N5408BH NDL2001N5408 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F...
Page 62 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. L301 INDUCTOR 4.7µH-J-26T LLAXJATTU4R7 TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P L302 INDUCTOR 4.7µH-J-26T LLAXJATTU4R7 TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P L303 INDUCTOR 12µH-J-26T LLAXJATTU120 TRANSISTOR 2SC1815-Y(TE2 F T) or QQSY2SC1815F L304 INDUCTOR 12µH-J-26T LLAXJATTU120 TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F...
Page 63 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. RESISTORS NPN TRANSISTOR 2SC5343M Y NQSY2SC5343M Q513 TRANSISTOR KTC3198-Y-AT/P or NQSYKTC3198P CHIP RES. 1/10W J 100 Ω or RRXAJR5Z0101 TRANSISTOR KTC3199-GR-AT/P or NQS4KTC3199P RES CHIP 1608 1/10W J 100 Ω RRXA101YF002 TRANSISTOR KTC3198-GR-AT/P or NQS4KTC3198P...
Page 64 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES.(1608) 1/10W 0 Ω or RES CHIP 1608 1/10W J 75 Ω R226 RRXAZR5Z0000 RRXA750YF002 RES CHIP 1608 1/10W J 0 Ω CHIP RES.(1608) 1/10W 0 Ω or RRXA000YF002 R334 RRXAZR5Z0000...
Page 65 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. RES CARBON FILM T 1/4W J 1.0k Ω CHIP RES. 1/4W J 1M Ω RCX4102T1001 RRX4JR7Z0105 RES CARBON FILM 1/4W J 2.2k Ω or CHIP RES. 1/4W J 1M Ω or R549 RCX4222FS002 R622...
Page 66 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES. 1/10W F 27k Ω or R802 RRXAFR5H2702 JACK SW RCA PCB S(RED) 01 MTJ-032- JYRJ010LY031 04A-75 FE CHIP RES.(1608) 1/10W F 27k Ω or RRXAFR5Z2702 JK301 JACK RGB PCB S 01/RGB-11HS JXGJ21YUQ001 RES CHIP 1608 1/10W F 27.0k Ω...
Page 67 INVERTER ASSEMBLY Ref. No. Description Part No. C1863 ELECTROLYTIC CAP . 1µF/50V M CE1JMASDL1R0 Ref. No. Description Part No. C1871 CAP CERAMIC (AX) 0.01µF/50V/F/Z CA1J103TU062 INVERTER ASSEMBLY A03P0M1V-002 C1872 POLYESTER FILM CAP . (PB FREE) 0.047µF/ CA2A473DT018 Consists of the following: 100V J or INVERTER POWER CBA ----------...
Page 68 Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM T 1/4W J 39k Ω or IC1832! PHOTO COUPLER PS2561L1-1-A-V(L) QPEL561L11AV R1805 RCX4393T1001 TRANSISTORS RES CARBON FILM 1/4W J 39k Ω RCX4393FS002 RES CARBON FILM T 1/4W J 390 Ω or R1806 RCX4391T1001 Q1801!
Page 69 Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM 1/4W J 390 Ω RCX4391FS002 D105 LED L-53HT or NP4Z000L53HT RES CARBON FILM 1/4W J 22k Ω or R1887 RCX4223FS002 LED 333HT/E-L or NPHL00333HTE RES CARBON FILM T 1/4W J 22k Ω RCX4223T1001 LED 333HT/E-K NPHK00333HTE...
Page 70 LH8-M40BB/LT8-M40BB A03P0EP/P1EP 2010-04-23...

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