FUNAI LH8-M26BB Service Manual

26" color lcd television

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Owner's manual (32 pages)

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SERVICE MANUAL

This Service Manual is for the

LH8-M26BB (A03A0EP) / LT8-M26BB (A03A1EP) model.

For the LH8-M26BB (A03A0EP) / LT8-M26BB (A03A1EP) model, the letter

(A03A0EP) / (A03A1EP) is printed on the Serial Number Label on the back

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

Serial No. Label

"A03A0EP"

"A03A1EP"

26" COLOR LCD TELEVISION

LH8-M26BB / LT8-M26BB

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Summary of Contents for FUNAI LH8-M26BB

Page 1: Service Manual
This Service Manual is for the LH8-M26BB (A03A0EP) / LT8-M26BB (A03A1EP) model. For the LH8-M26BB (A03A0EP) / LT8-M26BB (A03A1EP) model, the letter (A03A0EP) / (A03A1EP) 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
26″ COLOR LCD TELEVISION LH8-M26BB / LT8-M26BB 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 1366 1.
Page 4 < AUDIO > All items are measured across 16 Ω load at speaker output terminal. Description Condition Unit Nominal Limit 1. Audio Output Power 10% THD: Lch/Rch 5.0/5.0 4.0/4.0 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: Instructions For Handling Semi- Conductors
2. Installation Instructions for Handling Semi- 1. Using desoldering braid, remove the solder from conductors 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 (S-2) (S-2) (S-4) [2] Rear Cabinet (S-3) (S-2) [1] Stand Assembly (S-1) Fig. D1 A03A0DC...
Page 14 [3] Jack Holder(HP) (S-5) (S-6) [4] Jack CBA (S-7) [5] Inverter Power CBA (S-7) Fig. D2 [10] Digital Main CBA Unit [8] Jack Holder (S-11) (S-10) (S-11) (S-11) (H-1) (S-12) (S-11) [9] Shield Box (S-9) (S-11) (S-8) [6] Tuner Shield (S-9) (S-9) [7] Power Supply CBA...
Page 15 [11] PCB Holder (S-14) (S-13) [12] Stand Holder Fig. D4 [18] Front Cabinet [17] LCD Module Assembly (S-17) (S-18) [14] Speaker (S-15) Hook [13] Speaker Holder [R] (S-18) [15] Junction CBA (S-18) (S-16) (S-18) (S-15) [16] Function CBA Hook [14] Speaker [13] Speaker Holder [L] Fig.
Page 16 3. TV Cable Wiring Diagram To LCD To LCD Module Module Assembly Assembly Power Supply CBA Inverter Power CBA CN3903 CN402 CN3701 CN1952 CN1951 CN404 CN3702 CN453 CN403 CN3703 CN610 CN401 CN1900 CN3704 CL202B Digital Main CBA Unit CN802 CN801 CN101 AC CORD Jack CBA...
Page 17: 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 18 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 19: 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 20: 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 21: 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 22 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 23 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 24 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 25 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 26: Block Diagrams
BLOCK DIAGRAMS System Control Block Diagram A03A0BLS...
Page 27 Video Block Diagram A03A0BLV...
Page 28 Audio Block Diagram A03A0BLA1...
Page 29 Digital Signal Process Block Diagram A03A0BLD...
Page 30 Inverter Power Block Diagram A03A0BLINV...
Page 31 Power Supply Block Diagram A03A0BLP...
Page 32: 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 33 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 34 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 35 Power Supply 2 Schematic Diagram A03A0SCP2...
Page 36 Power Supply 3 & Jack Schematic Diagram Comparison Chart of Models and Marks Model Mark LH8-M26BB LT8-M26BB A03A0SCP3...
Page 37 Inverter Power Schematic Diagram NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. A03A0SCINP...
Page 38 Function & Junction Schematic Diagram A03A0SCIRF...
Page 39 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-M26BB LT8-M26BB A03A0SCD1...
Page 40 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-M26BB LT8-M26BB A03A0SCD2...
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-M26BB LT8-M26BB 9-10 A03A0SCD3...
Page 42 Digital Main 4 Schematic Diagram 9-11 A03A0SCD4...
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-M26BB LT8-M26BB 9-12 A03A0SCD5...
Page 44 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-M26BB LT8-M26BB 9-13 A03A0SCD6...
Page 45 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-M26BB LT8-M26BB 9-14 A03A0SCD7...
Page 46 Power Supply & 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 47 Power Supply & 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 48 Inverter Power, Function & 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 49 Inverter Power, Function & 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 50: 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 51 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 52: Wiring Diagram
WIRING DIAGRAMS A03A0WI 11-1...
Page 53: Exploded View
EXPLODED VIEWS Cabinet CL802 CL3903 SP802 Junction CBA Digital Main CBA Unit Function CBA Stand Assembly CL402 CL404 CL104A CL403 CL801 CL401 X3301 SP801 CL1952 LCD-1 CL453 See Electrical Parts List CL201A for parts with this mark. Jack CBA Inverter Power CBA AC601 B-11 Power Supply CBA...
Page 54 Packing Stand Some Ref. Numbers are Assembly not in sequence. Packing Tape Tape Packing Tape Tape Packing Tape 12-2 A03A0PEX...
Page 55: Mechanical Parts List
Comparison Chart of Models and Marks CLOTH(B) L5201U0 15X10X1.0T 0EM400076 SCREW P-TIGHT M4X14 BIND GBHP4140 Model Mark HEAD+BLK LH8-M26BB SCREW P-TIGHT 3X10 BIND HEAD+ GBHP3100 LT8-M26BB DOUBLE SEMS SCREW M4X6 M4X6 FPJ34060 ASSEMBLED SCREW ( D9 M3X6 ) 1EM424392B A71F0UH...
Page 56: Electrical Parts List
C214 CHIP CERAMIC CAP .(1608) CH J 100pF/ CHD1JJ3CH101 Model Mark C215 CHIP CERAMIC CAP .(1608) CH J 100pF/ CHD1JJ3CH101 LH8-M26BB LT8-M26BB C216 CHIP CERAMIC CAP . CH J 330pF/50V CHD1JJ3CH331 C217 CHIP CERAMIC CAP . CH J 330pF/50V CHD1JJ3CH331...
Page 57 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. C403 CHIP CERAMIC CAP .(1608) F Z 0.1µF/ CHD1EZ30F104 C624 CAP CERAMIC (AX) 220pF/50V/B/K CA1J221TU061 C625 CAP CERAMIC (AX) 0.01µF/50V/B/K CA1J103TU061 C404 CHIP CERAMIC CAP .(1608) F Z 0.1µF/ CHD1EZ30F104 C626 CAP CERAMIC (AX) 0.022µF/50V/B/K...
Page 58 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CONNECTOR PRINT MES 29 S 1.0-11- JC1129JSH001 DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F CN402 FFC CONNECTOR IMSA-9615S-29A- JC96J29ER007 D504 SCHOTTKY BARRIER DIODE SB390 NDWZ000SB390 PP-A or D505 DIODE ZENER 18BSB-T26 NDTB018BST26...
Page 59 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. D555 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 L602A! LINE FILTER MS036 or LLBG00ZY2009 DIODE SWITCHING HSS4148TE-E or QDTZ0HSS4148 LINE FILTER JLB2808 LLBG00ZXB004 DIODE SWITCHING 1N4148-F0021 NDTZ01N4148F L801 COIL SEALED POWER INDUCTORS LLARKGQTU680 LHL10NB680K or D609...
Page 60 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. NPN TRANSISTOR 2SC5343Y-AT or NQSY02SC5343 TRANSISTOR 2SC1815-Y(TE2 F T) or QQSY2SC1815F NPN TRANSISTOR 2SC5343G-AT or NQSG02SC5343 TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F NPN TRANSISTOR 2SC5343MG-AT or NQSG2SC5343M NPN TRANSISTOR 2SC5343Y-AT or NQSY02SC5343 NPN TRANSISTOR 2SC5343M Y NQSY2SC5343M...
Page 61 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. RES CARBON FILM 1/4W J 1.2k Ω or RES CHIP 1608 1/10W J 15k Ω RCX4122FS002 RRXA153YF002 RES CARBON FILM T 1/4W J 1.2k Ω CHIP RES. 1/10W J 47k Ω or RCX4122T1001 R229 RRXAJR5Z0473...
Page 62 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. CHIP RES. 1/10W J 75 Ω or RES CARBON FILM 1/4W J 1k Ω or R336 RRXAJR5Z0750 R548 RCX4102FS002 RES CHIP 1608 1/10W J 75 Ω RES CARBON FILM T 1/4W J 1.0k Ω RRXA750YF002 RCX4102T1001 CHIP RES.
Page 63 Ref. No. Mark Description Part No. Ref. No. Mark Description Part No. RES CHIP 1608 1/10W J 100 Ω RRXA101YF002 MODULE HEAT SINK PMC P7150UT 1EM423968 RES CARBON FILM 1/4W J 820k Ω R631 RCX4824FS002 BC11 BEADS INDUCTOR FBR07HA121SB-00 LLBF00STU030 RES CARBON FILM 1/4W J 820k Ω...
Page 64 Ref. No. Mark Description Part No. Ref. No. Description Part No. WIRE COPPER JP0.6MM XZ40C0AKM001 CAP POLYESTER FILM 0.01µF/100V/J/PCMT CTA103PKR003 JS553 WIRE COPPER 6111-06003-0120 or XZ40C0SHG002 POLYESTER FILM CAP . 0.01µF/100V J CMB103EUR001 WIRE COPPER JP0.6MM XZ40C0AKM001 C1933 POLYESTER FILM CAP . (PB FREE) 0.056µF/ CA2A563DT018 JS601 WIRE COPPER 6111-06003-0120 or...
Page 65 Ref. No. Description Part No. Ref. No. Description Part No. RES CARBON FILM 1/4W J 820k Ω TRANSISTOR 2SC1815-Y(TE2 F T) or QQSY2SC1815F R1950 RCX4824FS002 RES CARBON FILM 1/4W J 820k Ω TRANSISTOR 2SC1815-GR(TE2 F T) or QQS12SC1815F R1951 RCX4824FS002 RES CARBON FILM 1/4W J 820k Ω...
Page 66 Ref. No. Description Part No. RES CARBON FILM T 1/4W J 220 Ω RCX4221T1001 RES CARBON FILM 1/4W J 220 Ω or R124 RCX4221FS002 RES CARBON FILM T 1/4W J 220 Ω RCX4221T1001 RES CARBON FILM 1/4W J 1k Ω or R126 RCX4102FS002 RES CARBON FILM T 1/4W J 1.0k Ω...
Page 67 LH8-M26BB/LT8-M26BB A03A0EP/A1EP 2009-12-18...

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