SERVICE MANUAL 20" COLOR TELEVISION 6420FE EWF2004
IMPORTANT SAFETY NOTICE Proper service and repair is important to the safe, reliable operation of all Funai Equipment. The service procedures recommended by Funai and described in this service manual are effective methods of performing service operations. Some of these service special tools should be used when and as recommended.
SPECIFICATIONS ANT. Input ------------------- 75ohm Unbal., F type Reference Level ----------- 20Vp-p (CRT Green Cathode) Test Input Signal ---------- 400Hz 30% modulation Description Condition Unit Nominal Limit 1. Intermediate Freq. Picture Sound MHz MHz 45.75 41.25 - 2. Peak Picture Sens VHF CATV UHF dBµv dBµv dBµv 15 15 15 30 30 40 - MHz ±2.0 ±0.7 Condition Unit Nominal Limit 1. Deflection Freq. Horizontal Vertical KHz Hz 15.734 60 - 2.
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. Safety Precautions for TV Circuit age current tester or a metering system that complies with American National Standards Institute (ANSI) C101.
earth ground. If a voltage reading in excess of 1.0V is obtained, remove and reinsert the AC power plug in the opposite polarity and again measure the voltage potential between the chassis and a known earth ground. ing is performed that involves B+, horizontal deflection or high voltage. Correct operation of the Xradiation protection circuits also must be reconfirmed each time they are serviced. (X-radiation protection circuits also may be called "horizontal disable" or "hold down.
Precautions during Servicing 3) Align the lengths of the wires to be connected. Insert the wires fully into the connector. A. Parts identified by the ( # ) symbol are critical for safety. Replace only with part number specified. 4) Use the crimping tool to crimp the metal sleeve at the center position. Be sure to crimp fully to the complete closure of the tool. B. In addition to safety, other parts and assemblies are specified for conformance with regulations applying to spurious radiation.
Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards. Chassis or Secondary Conductor Primary Circuit Terminals d' d 1.
STANDARD NOTES FOR SERVICING Circuit Board Indications How to Remove / Install Flat Pack-IC a. The output pin of the 3 pin Regulator ICs is indicated as shown. 1. Removal Top View Out With Hot-Air Flat Pack-IC Desoldering Machine: (1) Prepare the hot-air flat pack-IC desoldering machine, then apply hot air to the Flat Pack-IC (about 5 to 6 seconds). (Fig. S-1-1) Bottom View In Input b. For other ICs, pin 1 and every fifth pin are indicated as shown. 5 Pin 1 10 Fig. S-1-1 c.
With Soldering Iron: 3. The flat pack-IC on the CBA is affixed with glue, so be careful not to break or damage the foil of each pin or the solder lands under the IC when removing it. CBA (1) Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig.
2. Installation (4) Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (1) Using desoldering braid, remove the solder from the foil of each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easily. (5) Release the flat pack-IC from the CBA using tweezers. (Fig.
Instructions for Handling Semiconductors Electrostatic breakdown of the semiconductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work. 1. Ground for Human Body Be sure to wear a grounding band (1MΩ) that is properly grounded to remove any static electricity that may be charged on the body. 2.
CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart Note : (1) Order of steps in procedure. When reassembling, follow the steps in reverse order. These numbers are also used as the Identification (location) No. of parts in figures. This flowchart indicates the disassembly steps for the cabinet parts, and the CBA in order to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route and dress the cables as they were. (2) Parts to be removed or installed.
(S-1) (S-1) (S-1) [3] Main CBA (S-1) (S-4) (S-2) [1] Rear Cabinet Fig. 1 Fig. 3 [2] CRT CBA (S-1) (S-3) (S-1) Anode Cap (S-2) (S-3) (S-4) (S-3) (S-1) (S-1) (S-1) (S-3) [1] Rear Cabinet [4] CRT Fig. 2 Fig.
TV Cable Wiring Diagram DG691 DEGAUSSING COIL SP802 SP801 MAIN CBA CLN802 CLN801 CN802 CN801 CN691 WH301A TU11 TUNER FLYBACK TRANSFORMER CN571 T571 WH501A TO CRT GROUND AC601 AC CORD WH501B CN1501 FOCUS SCREEN JK1501 WH301B ANODE Fig.
ELECTRICAL ADJUSTMENT INSTRUCTIONS How to set up the service mode: General Note: "CBA" is abbreviation for "Circuit Board Assembly." NOTE: Service mode: 1. Use the service remote control unit. 2. Turn the power on. (Use main power on the TV unit.) 3. Press "SLEEP" button on the service remote control unit. Version of micro computer will display on the CRT. (Ex: 058-0.06) 4. Check the display on the lower left is "2641" and if it is not "2641," set it at "2641" according to "2. Initial Setting.
2. Initial Setting CLR General 1. Press "MENU" button on the service remote control unit. Then select "COLOR" (CLR) display. 1. Enter the Service mode. (See page 5-1) 2. Press "VOL p" button on the service remote control unit. Display changes "C/D," "7F," "LANGUAGE," "ACCESS CODE," "SOUND TYPE," "VIDEO TONE," "FM MODE," "V-OUT," "VIDEO," "AV MEMO," "STABLE SOUND," "FILTER," "1000," "YUV MEMORY," "NO SIG BRT," "A-MUTE POL," and "V-MENU" cyclically when "VOL p" button is pressed. 3.
4. H f0 Adjustment 6. Purity Check Purpose: To get correct horizontal frequency. 1. Enter the Service mode. (See page 5-1) Use service remote control unit. 2. Press "7" button on the remote control unit. Each time pressing 7" button on the remote control unit, display changes Red mode, Green mode, Blue mode, and White mode cyclically. 1. Press "2" button on the service remote control unit. and select H-ADJ mode. (By pressing "2" button the display will change from TV AGC to H-ADJ.) 3.
8. H. Position Adjustment 10. V. Position Adjustment Purpose: To obtain correct horizontal position of screen image. Purpose: To obtain correct vertical width of screen image. Symptom of misadjustment: If V. Position is incorrect, vertical height of image on the screen may not be properly displayed. Symptom of Misadjustment: If H. Position is incorrect, horizontal position of image on the screen may not be properly displayed. Test Point Adj. Point Mode Input Test Point Adj.
12. Cut-off Adjustment 13. White Balance Adjustment Purpose: To adjust the beam current of R, G, B, and screen voltage. Symptom of Misadjustment: White color may be reddish, greenish or bluish. Purpose: To mix red, green and blue beams correctly for pure white. Symptom of Misadjustment: White becomes bluish or reddish. Test Point Adj. Point Mode Input --- Screen-Control CH o / p buttons RF Black Raster Tape M. EQ. Spec. --- Pattern Generator See Reference Notes below.
14. Sub-Brightness Adjustment The following adjustments normally are not attempted in the field. Only when replacing the CRT then adjust as a preparation. Purpose: To get proper brightness. Symptom of Misadjustment: If Sub-Brightness is incorrect, proper brightness cannot be obtained by adjusting the Brightness Control. 16. Purity Adjustment Purpose: To obtain pure color. Symptom of Misadjustment: If Color Purity Adjustment is incorrect, large areas of color may not be properly displayed.
17. Convergence Adjustment Purpose: To obtain proper convergence of red, green and blue beams. Symptom of Misadjustment: If Convergence Adjustment is incorrect, the edge of white letters may have color edges. Test Point Adj. Point Mode Input --- C.P. Magnet (RB), C.P. Magnet (RB-G), Deflection Yoke --- Dot Pattern or Crosshatch Tape M. EQ. Spec. --- Pattern Generator See below. Figures CRT COIL SCREW PURITY RB RB-G RING LOCK SCREW DY WEDGE C.P. MAGNET CLAMPER C.P.
6-1 AFT-IN AGC SCL SDA MAIN CBA TO IF/VIDEO BLOCK TO AUDIO BLOCK CS 7 SCL 6 SDA 5 IC151 (MEMORY) 73 AFT-IN 75 AGC 72 I2C-OPEN 58 SCL 56 SDA IC111 TV MICON/VIDEO /AUDIO/CHROMA /DEFLECTION KEY SWITCH KEY-IN1 66 KEY-IN2 69 74 28 18 40 79 68 67 76 DG-ON-H +5V-CTRL +5V-CTRL2 +8V-CTRL P-ON-H PROTECT-1 PROTECT-2 PROTECT-3 VOLUME 62 A-MUTE 57 INPUT1 80 INPUT0 63 REMOTE SENSOR RCV101 RCV-IN 70 Q131 Q161 DG-ON-H +5V-CTRL +5V-CTRL2 +8V-CTRL PROTECT-1 PROTECT-2 P-ON-H PROTECT-1 PROTECT-2 PROTECT
JK701 VIDEO-IN (FRONT) 1 4 5 8 IF 11 AGC SCL SDA EXT.CLK TU11 WF16 C 6-2 Y JK721 S-VIDEO-IN SAW FILTER SF11 RF/IF SIGNAL WF1 14 16 17 LINE TUNER 61 S-SW 30 29 24 26 AFT VCO VIDEO DET CPN. CPS. CPS. CPN.
6-3 JK703 AUDIO-IN(R) (FRONT) JK702 AUDIO-IN(L) (FRONT) JK711 AUDIO-IN(R) (REAR) JK711 AUDIO-IN(L) (REAR) TO IF/VIDEO BLOCK MAIN CBA SIF 24 27 21 SAP FILTER STEREO FILTER (L-CH) TUNER REAR FRONT 9 10 SW CTL (R-CH) TUNER 4 REAR 2 FRONT 1 11 15 12 SAP DEMOD OFFSET CANCEL 3 13 IC771 (INPUT SELECT) I2C DECORDER VCA IC431 (MTS/SAP AUDIO SIGNAL PROCESS) SAP OUT FILTER L-R FILTER L+R FILTER WF6 8 3 (R-CH) (L-CH) IC801 (AUDIO AMP) (L-R)/SAP SW 75uS DE-EMPH 2 MUTE /STANDBY CONT
6-4 TO IF/VIDEO BLOCK WH301A T572 WF8 H.OUTPUT Q571 X-RAY TP592 TP591 WF7 Q572 H.DRIVE WH301B RED 3 GREEN 4 BLUE 5 FBP-IN ACL PROTECT-1 PROTECT-2 PROTECT-3 TO SYSTEM CONTROL BLOCK TO IF/VIDEO BLOCK PROTECT-4 DEF+B +B H-DRIVE V-RAMP-F/B TO POWER SUPPLY BLOCK TO IF/VIDEO BLOCK RAMP-OUT MAIN CBA VIDEO SIGNAL 4 5 3 1 WF3 6 9 7 10 8 1 7 Q1511 RED AMP T571 F.B.T.
DG691 DEGAUSSING COIL AC601 AC CORD PS691 CN691 F601 4A/125V 4A/125V 6-5 BRIDGE RECTIFIER D605 - D608 Q602 LIMITER Q601 SWITCHING LINE FILTER L601 HOT CIRCUIT. BE CAREFUL. IC601 ERROR VOLTAGE DET HOT CAUTION ! Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. If Main Fuse (F601) is blown, 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.
SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS Standard Notes 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.
LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE_A,_V FUSE. ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE_A,_V. 2. CAUTION: Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit.
Main 1/4 Schematic Diagram VIDEO SIGNAL MAIN 1/4 Ref No.
Main 2/4 Schematic Diagram VIDEO SIGNAL AUDIO SIGNAL G4 H4 I4 J4 K4 L4 MAIN 2/4 Ref No.
Main 3/4 Schematic Diagram IF SIGNAL VIDEO SIGNAL AUDIO SIGNAL M4 CAUTION ! Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. If Main Fuse (F601) is blown, 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. Otherwise it may cause some components in the power supply circuit to fail.
Main 4/4 & CRT Schematic Diagram MAIN 4/4 Ref No. Position IC S-3 IC551 TRANSISTORS U-2 Q571 T-2 Q572 CONNECTORS CN571 T-3 CRT Ref No. Position TRANSISTORS Q1511 W-1 W-1 Q1521 X-1 Q1531 CONNECTORS CN1501 X-2 WH301B V-2 WH501B V-3 Ref No.
Main CBA Top View CAUTION ! Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. If Main Fuse (F601) is blown, check to see that all components in the power supply 4A/125V circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail. CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE.
Main CBA Bottom View CAUTION ! Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. If Main Fuse (F601) is blown, 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. Otherwise it may cause some components in the power supply circuit to fail. 4A/125V CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE.
CRT CBA Top View CRT CBA Bottom View CRT CBA Ref No.
WAVEFORMS WF1 ~ WF16 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) INITIAL POSITION: Unplug unit from AC outlet for at least 5 minutes. reconnect to AC outlet and then turn power on. (Brightness---Center Color---Center Tint --- Center Contrast---Approx 70%) GND GND WF1 1DIV: 0.5V 20µs IC 111 Pin 26 WF5 1DIV: 2V 20µs Q 1531 Base WF2 1DIV: 0.5V 20µs IC 111 Pin 14 WF6 1DIV: 0.
WF1 ~ WF16 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) INITIAL POSITION: Unplug unit from AC outlet for at least 5 minutes. reconnect to AC outlet and then turn power on.
WIRING DIAGRAM CLN801 SP801 SPEAKER L-CH CLN802 SP802 SPEAKER R-CH CN801 1 SP-L 2 SP-GND CN802 1 SP-R 2 SP-GND ANODE TU11 TUNER UNIT V501 CRT MAIN CBA BL2700F01012-1 CN691 1 2 GND CN1501 FOCUS T571 FBT SCREEN WH301B BLUE GREEN RED GND +8V CRT CBA BL2700F01012-2 5 4 3 2 1 WH501B HEATER 3 GND 2 +200V 1 CLN301 CLN501 DY551 D.Y.
IC PIN FUNCTIONS IC111 (TV Micro Controller) Pin No. Signal Name Pin No. Function Signal Name Function 35 N.U. Not Used 1 CNVSS GND 36 N.U. Not Used 2 N.U. Not Used 37 V RAMP F/B V Ramp Feed Back 3 N.U. Not Used 38 V RAMP OUT Vertical Output 4 N.U. Not Used 39 V RAMP CAP V Ramp OSC Capacitor 5 GND GND 40 8.7 VREG OUT DC 8.7V Output 6 VCC ALL +5V 41 N.U. Not Used 7 N.U.
Pin No. Signal Name Function 71 MONO-OUT MONO-OUT 72 I2C OPEN White Balance Adjustment Judgement 73 AFT-IN AFT Voltage Input 74 DG-ON-H Degaussing Coil Control 75 AGC AGC Voltage Input 76 PROTECT 3 Power Supply Protection 77 N.U. Not Used 78 N.U.
EXPLODED VIEWS Cabinet SHINWHA TAPE SGT-730 (BLACK) V501-1 L-8 V501-2 Details for DY551 and surrounding parts L-8 SHINWHA TAPE SGT-730 (WHITE) A-4 L-8 DY551 L-10 Scotch Tape #880 L-9 B-5 B-11 B-2 L-8 L-8 CLN801 CLN551 DY551 L-8 L-13 B-2 SP801 A-2 CRT CBA B-11 B-2 B-5 B-13 L-8 DG691 A-1 B-3 L1 B-5 B2 Scotch B-1 Tape #880 L1 B-2 B12 PB4 B12 V501 AC601 CLN802 B-5 L-13 SP802 MAIN CBA A-3 B-13 11-1 11-2 L2401CEX
Packing S-2 S-4 X-1 X-2 X-3 S-6 X-4 S-3 Tape X-5 S-1 FR ON T S-7 S-5 Packing Tape 11-3 L2401PEX
MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a # have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don't degrade the safety of the product through improper servicing. NOTE: Parts that are not assigned part numbers (---------) are not available. Ref. No. Mark S-5 Mark 6420FE A EWF2004 B ---------- HOLD PAD L1400UA 0EM406207 S-7 B LABEL, EAS(H3761UD) MAKER NO.
ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a # have special characteristics important to safety. Before replacing any of these components, read carefully the product safety notice in this service manual. Don't degrade the safety of the product through improper servicing. Ref. No. C58 C104 C111 NOTES: 1. Parts that are not assigned part numbers (---------) are not available. 2. Tolerance of Capacitors and Resistors are noted with the following symbols. C.....±0.25% D.....±0.5% F.....
Ref. No. Description Part No. Ref. No. C507 Description FILM CAP.(P) 0.047µF/50V J or Part No. ELECTROLYTIC CAP. 1000µF/10V M CE1AMASDL102 CMA1JJS00473 C351 CERAMIC CAP.(AX) B K 100pF/50V CCA1JKT0B101 FILM CAP.(P) 0.047µF/50V J CA1J473MS029 C352 CERAMIC CAP.(AX) B K 100pF/50V CCA1JKT0B101 C520# ELECTROLYTIC CAP. 4.7µF/50V M or CE1JMASTL4R7 C353 ELECTROLYTIC CAP. 1µF/50V M or CE1JMASTL1R0 # ELECTROLYTIC CAP. 4.7µF/50V M CE1JMASDL4R7 ELECTROLYTIC CAP.
Ref. No. Description Part No. Ref. No. Part No. ELECTROLYTIC CAP. 100µF/160V M or # ELECTROLYTIC CAP. 100µF/160V M or CE2CMZNDL101 # ELECTROLYTIC CAP. 100µF/160V M CE2CMZPDL101 C657# ELECTROLYTIC CAP. 470µF/35V M(VR) or CE1GMZNTL471 # ELECTROLYTIC CAP. 470µF/35V M or CE1GMZADL471 CN571# CONNECTOR BASE, 5P TV-50P-05-V3 or J3TVC05TG002 # ELECTROLYTIC CAP. 470µF/35V M or CE1GMZNDL471 # CONNECTOR BASE, 5P RTB-1.5-5P or J3RTC05JG001 # ELECTROLYTIC CAP.
Ref. No. Description Ref. No. Part No. Description Part No.
Ref. No. Description TRANSISTOR KTC3198(GR) or Part No. NQS40KTC3198 TRANSISTOR 2SC3331(T)-AANP or 2SC3331TZ TRANSISTOR 2SC3331(U)-AANP or 2SC3331UZ Ref. No. Description Part No. Q696 RES. BUILT-IN TRANSISTOR BA1F4M-T or QQSZ00BA1F4M RES.
Ref. No. R161 Description Part No. CHIP RES.(1608) 1/10W J 470 Ω RRXAJB5Z0471 Ref. No. R572 Description Part No. METAL OXIDE FILM RES. 2W J 1k Ω or RN02102ZU001 R162 CHIP RES.(1608) 1/10W J 22k Ω RRXAJB5Z0223 METAL OXIDE FILM RES. 2W J 1k Ω RN02102DP004 R163 CHIP RES.(1608) 1/10W J 470 Ω RRXAJB5Z0471 R575# CARBON RES. 1/4W J 15 Ω RCX4JATZ0150 R164 CHIP RES.(1608) 1/10W J 10k Ω RRXAJB5Z0103 R576 CHIP RES.(1608) 1/10W J 1k Ω RRXAJB5Z0102 R165 CHIP RES.(1608) 1/10W J 4.
Ref. No. Description Part No. R671 CARBON RES. 1/4W J 3.3k Ω RCX4JATZ0332 R672 CARBON RES. 1/4W J 3.3k Ω RCX4JATZ0332 R673 CARBON RES. 1/4W J 100k Ω Ref. No. Description Part No. SWITCHES SW101 TACT SWITCH SKQSAB or SST0101AL038 RCX4JATZ0104 TACT SWITCH KSM0612B or SST0101HH003 R674 CHIP RES.(1608) 1/10W J 22k Ω RRXAJB5Z0223 TACT SWITCH SKHHAM or SST0101AL029 R675 CARBON RES. 1/4W J 15k Ω RCX4JATZ0153 TACT SWITCH TC-1104(H=5.0) SST0101DNG02 R676 CHIP RES.
Ref. No. Description Part No. J120 CHIP RES. 1/10W J 0 Ω RRXAJB5Z0000 J135 CHIP RES. 1/10W J 0 Ω RRXAJB5Z0000 J180 CHIP RES. 1/10W J 0 Ω RRXAJB5Z0000 J196 CHIP RES. 1/10W J 0 Ω RRXAJB5Z0000 J242 CHIP RES. 1/10W J 0 Ω RRXAJB5Z0000 JC703 CHIP RES. 1/10W J 0 Ω RRXAJB5Z0000 JC704 CHIP RES. 1/10W J 0 Ω RRXAJB5Z0000 JK701 JK702 Part No. CCD3DKN0B102 C1511 CERAMIC CAP.(AX) B K 330pF/50V CCA1JKT0B331 C1521 CERAMIC CAP.(AX) B K 270pF/50V CCA1JKT0B271 C1531 CERAMIC CAP.
6420FE/EWF2004 L2401UB/L2404UE 2004-04-12
