Emerson EWC1303A Service Manual
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Emerson EWC1303A Service Manual

13" color tv/vcr combination
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SERVICE MANUAL
Main Section
I Specifications
I Preparation for Servicing
I Adjustment Procedures
I Schematic Diagrams
I CBA's
I Exploded Views
I Parts List
13" COLOR TV/VCR COMBINATION
When servicing the deck
mechanism, refer to MK12.5 Deck
Mechanism Section.
Deck Mechanism Part No.:
N2226FT
EWC1303A
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Summary of Contents for Emerson EWC1303A

  • Page 1 When servicing the deck I Specifications mechanism, refer to MK12.5 Deck I Preparation for Servicing Mechanism Section. I Adjustment Procedures I Schematic Diagrams I CBA’s Deck Mechanism Part No.: I Exploded Views N2226FT I Parts List 13" COLOR TV/VCR COMBINATION EWC1303A...
  • Page 2 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.

  • Page 3: Table Of Contents

    MAIN SECTION 13" COLOR TV/VCR COMBINATION EWC1303A Main Section I Specifications I Preparation for Servicing I Adjustment Procedures I Schematic Diagrams I CBA’s I Exploded Views I Parts List TABLE OF CONTENTS Specifications................1-1-1 Important Safety Precautions.

  • Page 4: Specifications

    SPECIFICATIONS *ˆ M ode---------SP mode unless otherwise specified *Test input terminal -------------Video input (1Vp-p) Audio input (-10dB) -----------------------Ant. input (80dBµV) Video: 87.5% Audio: 25kHz dev (1kHz Sin) Description Condition Unit Nominal Limit 1. Over Scan — ±5 2. Linearity Horizontal —...
  • Page 5

  • Page 6: 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 7 ing is performed that involves B+, horizontal de- earth ground. If a voltage reading in excess of 1.0V flection or high voltage. Correct operation of the is obtained, remove and reinsert the AC power X-radiation protection circuits also must be recon- plug in the opposite polarity and again measure firmed each time they are serviced.
  • Page 8 Precautions during Servicing H. When a power cord has been replaced, check that 5~6 kg of force in any direction will not loosen it. A. Parts identified by the ( # ) symbol are critical for I. Also check areas surrounding repaired locations. safety.
  • Page 9 Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, Chassis or Secondary Conductor parts and wires have been returned to original posi- tions. Afterwards, perform the following tests and con- Primary Circuit Terminals firm the specified values in order to verify compliance with safety standards.

  • Page 10: Standard Notes For Servicing

    STANDARD NOTES FOR SERVICING Circuit Board Indications How to Read the Values of the Rect- angular Type Chip Components 1. The output pin of the 3 pin Regulator ICs is indi- cated as shown: Example: (a) Resistor Top View Bottom View Input = 473 = 47 [k ] (Top View)
  • Page 11 How to Remove / Install Flat Pack IC 2. Removing the leadless component Grasp the leadless component body with tweezers Caution: and alternately apply heat to both electrodes. When 1. The Flat Pack-IC shape may differ by models. Use the solder on both electrodes has melted, remove an appropriate hot-air flat pack-IC desoldering leadless component with a twisting motion.
  • Page 12 2. Installation a. 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. b. The "I" mark on the Flat Pack - IC indicates pin 1 (See Fig.
  • Page 13 Instructions for Handling Semiconductors Presolder Electrostatic breakdown of the semiconductors may occur due to a potential difference caused by electro- static charge during unpacking or repair work. Ground for Human Body Be sure to wear a grounding band (1M ) that is prop- erly grounded to remove any static electricity that may be charged on the body.

  • Page 14: Preparation For Servicing

    PREPARATION FOR SERVICING How to Enter the Service Mode Adjustment Mode Purity check mode: Shows Red, Green, Caution: 1 Blue or White cyclically on the screen 1. Optical sensors system are used for Tape Start and each time the "7" key is pressed. End Sensor on this equipment.

  • Page 15: Cabinet Disassembly Instructions

    CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart (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 This flowchart indicates the disassembly steps for the parts in Figures. cabinet parts and the CBA in order to gain access to item(s) to be serviced.
  • Page 16 [1] REAR CABINET Fig. 1 [1] REAR CABINET Fig. 2 1-5-2 T5553DC...
  • Page 17 [2] TRAY CHASSIS [3] DECK UNIT [4] MAIN CBA Fig. 3 1-5-3 T5553DC...
  • Page 18 ANODE CAP. CRT CBA [5] CRT Fig. 4 1-5-4 T5553DC...
  • Page 19 ANODE CL502A CN505 CL501A CRT CBA FOCUS SCREEN TO SPEAKER MAIN CBA CL403 TO DEGAUSS COIL CN801 CN601 AC CORD CL502B CL401 CL402 CN571 CL201 CL501B CYLINDER CAPSTAN ASSEMBLY MOTOR ACE HEAD FE HEAD DECK UNIT ASSEMBLY Fig. 5 1-5-5 T5553DC...

  • Page 20: Electrical Adjustment Instructions

    ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: How to Set up the Service mode: "CBA" is abbreviation for "Circuit Board Service mode: Assembly." 1. Use the service remote control unit. NOTE: 2. Turn the power on. Electrical adjustments are required after replacing cir- 3.
  • Page 21 3-1. H Adjustment 3-2. C-Trap Adjustment Purpose: To get correct horizontal position and size of Purpose: To get minimum leakage of the color signal screen image. carrier. Symptom of Misadjustment: Horizontal position and Symptom of Misadjustment: If C-Trap Adjustment is size of screen image may not be properly displayed.
  • Page 22 3-3. Y DL Time TV/Y DL Time EXT/ Y SW LPF/Black Stretch Off/ C-TRAP Adjustment (Factory mode) Black Stretch CONT/C. Angle "0" Adjustment button button C-TRP 0 C-TRP 1 Purpose: To get minimum leakage of the color signal carrier. button Symptom of Misadjustment: If Y DL Time Adjust- "0"...
  • Page 23 4. V. Size Adjustment 6. H. Shift Adjustment Purpose: To obtain correct vertical height of screen Purpose: To obtain correct horizontal position and image. size of screen image. Symptom of Misadjustment: If V. Size is incorrect, Symptom of Misadjustment: Horizontal position and vertical height of image on the screen may not be size of screen image may not be properly displayed.
  • Page 24 8. Sub-Brightness Adjustment Notes: Screen Control FBT --- MAIN CBA F.B.T= Fly Back Transformer Purpose: To get proper brightness. Use the Remote Control Unit Symptom of Misadjustment: If Sub-Brightness is 1. Degauss the CRT and allow CRT to operate for 20 incorrect, proper brightness cannot be obtained by minutes before starting the alignment.
  • Page 25 9. Focus Adjustment The following 2 adjustments normally are not attempted in the field. They should be done Purpose: Set the optimum Focus. only when replacing the CRT then adjust as a Symptom of Misadjustment: If Focus Adjustment is preparation. incorrect, blurred images are shown on the display.
  • Page 26 13. Convergence Adjustment 1. Set the unit to the AUX mode which is located before CH2 then input a Dot or crosshatch pattern. Purpose: To obtain proper convergence of red, green 2. Loosen the Ring Lock and align red with blue dots and blue beams.

  • Page 27: Block Diagrams

    BLOCK DIAGRAMS Servo/System Control Block Diagram 1-7-1 T5553BLS...
  • Page 28 Video Block Diagram 1-7-2 T5553BLV...
  • Page 29 Audio Block Diagram 1-7-3 T5553BLA...
  • Page 30 Chroma/Tuner Block Diagram 1-7-4 T5553BLC...
  • Page 31 CRT/H.V. Block Diagram 1-7-5 T5553BLCRT...
  • Page 32 Power Supply Block Diagram 1-7-6 T5553BLP...

  • Page 33: Mechanical Trouble Indicator

    MECHANICAL TROUBLE INDICATOR 1, Each Malfunction Indication POWER SAFETY 1) POWER SAFETY 2 If the MONITOR is turned ON right after the Mechani- If P-SAFETY 2 port becomes continuously 2.5V or cal Malfunction occurs or POWER SAFETY is turned less for 120 msec. (4 times 40 msec. interval) when ON, display the following character to show Malfunc- P-ON-H port is ON, the unit shall be assumed to be tion after the EJECT display.
  • Page 34 Mechanical Malfunction determination 4) Countermeasure for CASSETTE LOADING Mal- function 1) REEL Malfunction detection a) CASSETTE IN operating Malfunction Countermeasure for REEL and CAPSTAN motor If LD-SW does not go to SB position after a lapse rotation malfunction (Except CASSETTE LOAD- of 5 sec.

  • Page 35: Power Supply Trouble Shooting Guide

    Power Supply Trouble Shooting Guide It is highly recommended that a variable isolation Voltage approx. 5Vp-p transformer which can monitor current be used. (Alternatively a variable AC source which monitors current will do). Read directions below before power is added! T=Approx.
  • Page 36 Repair method #2 Check the primary rectifying diodes (D603-D606) as possible problems. Remove the above mentioned parts and check them. Perform check according to the step 1 and 2 of repair method #1 and check for defects following parts, then if necessary replace with factory originals.

  • Page 37: Schematic Diagrams / Cba's And Test Points

    SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS Standard Notes Note: 1. Do not use the part number shown on these draw- Warning ings for ordering. The correct part number is shown in the parts list, and may be slightly different or Many electrical and mechanical parts in this chassis amended since these drawings were prepared.
  • Page 38 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.
  • Page 39 Main 1/5 Schematic Diagram MAIN 1/5 Ref No. Position IC201 IC202 TRANSISTORS Q205 Q206 CONNECTOR CL201 TEST POINTS TP201 TP202 1-8-3 1-8-4 T5553SCM1...
  • Page 40 Main 2/5 Schematic Diagram REC Video Signal PB Video Signal PB Audio Signal REC Audio Signal MAIN 2/5 Ref No. Position IC401 IC801 TRANSISTORS Q401 Q402 Q871 Q872 Q873 Q874 Q875 CONNECTORS CL401 CL402 CL403 CN801 TEST POINTS TP301 TP401 TP402 T5553SCM2 1-8-5...
  • Page 41 Main 3/5 Schematic Diagram PB Video Signal REC Video Signal PB Audio Signal REC Audio Signal MAIN 3/5 Ref No. Position IC001 IC301 TRANSISTOR Q301 TEST POINT TP302 1-8-7 1-8-8 T5553SCM3...
  • Page 42 VOLTAGE CHART (Power off mode) Main 4/5 Schematic Diagram Ref. No. MAIN 4/5 IC601 11.0 10.0 16.0 CAUTION ! Ref No. Position Ref No. Position Ref. No. CAUTION: FOR CONTINUED PROTECTION AGAINST RISK Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. TRANSISTORS IC602 OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE.
  • Page 43 Main 5/5 & CRT Schematic Diagram MAIN 5/5 Ref No. Position Ref No. Position TRANSISTORS CC-2 IC551 Q511 CC-2 TRANSISTORS Q521 AA-2 Q531 CC-2 Q571 CONNECTORS Q572 BB-3 Q591 CL501A CONNECTORS BB-2 CL502A CN505 DD-2 BB-3 CL501B BB-2 CL502B CN571 PB Video Signal REC Video Signal 1-8-11...
  • Page 44 Main CBA Top View Sensor CBA Top View CAUTION ! CAUTION: FOR CONTINUED PROTECTION AGAINST RISK Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE. If Main Fuse (F601) is blown, check to see that all components in the power supply circuit ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE TO SENSOR CBA...
  • Page 45 Main CBA Bottom View CAUTION ! BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER CAUTION: FOR CONTINUED PROTECTION AGAINST RISK Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit. OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE. SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
  • Page 46 CRT CBA Top View CRT CBA Bottom View CRT CBA Ref No. Position TRANSISTORS Q511 Q521 Q531 CONNECTORS CL501A CL502A CN505 WF15 WF14 WF16 Q521 Q511 Q531 Collector Collector Collector 1-8-17 1-8-18 BT5500F01011...

  • Page 47: Waveforms

    WAVEFORMS Z13WF 1-9-1...

  • Page 48: Wiring Diagram

    WIRING DIAGRAM T5553WI 1-10-1...

  • Page 49: System Control Timing Charts

    SYSTEM CONTROL TIMING CHARTS Chart 1 EJECT ST-S "OFF" CASS.LOAD LD-FWD 0.2S LD-REV SFT-SW STOP(B) POWER LD-FWD 0.4S LD-FWD 0.2S LD-REV 0.2S LD-FWD 0.5S LD-REV STOP(A) PLAY LD-FWD PLAY LD-FWD RS1(RS2) LD-REV 0.2S LD-FWD FS1(FS2) PLAY PLAY PAUSE STILL PAUSE NOISE CANCEL PAUSE...
  • Page 50 Chart 2 STOP(A) STOP LD-REV 0.2S LD-FWD 0.2S STOP /EJECT 1.0S LD-FWD 0.5S LD-REV STOP(A) LD-REV 0.2S LD-FWD 0.2S STOP /EJECT LD-REV 1.0S LD-FWD 0.5S LD-REV STOP(A) LD-FWD PAUSE LD-FWD 2.5S Short REV LD-REV 0.2S LD-FWD REC PAUSE REC or PAUSE STOP /EJECT...

  • Page 51: Ic Pin Function Descriptions

    IC PIN FUNCTION DESCRIPTIONS IC201 (TV/VCR Micro Controller) Signal Function Name “H” ≥ 4.5V, “L” ≤ 1.0V Not Used Signal Function REC- Record Protection Tab Name SAFETY Detection LD-SW Loading Switch Input System Reset Signal RESET Not Used (Reset=”L”) Power Supply Failure XC-IN Sub Clock 32 kHz P-SAFETY 2...
  • Page 52 Signal Signal Function Function Name Name Not Used CTL AMP 97 OUT Control Amp Output YCA-SOUT YCA-SOUT Signal P-ON+5V Power Supply for AMP YCA-CS YCA-CS Signal AL+5V A/D, D/A Standard Voltage YCA-SCLK YCA-SCLK Signal Not Used E2PROM/CHROMA IC 71 OUT SCL Tuner Communication Clock E2PROM/CHROMA IC...

  • Page 53: Lead Identifications

    LEAD IDENTIFICATIONS 2SC5884000RF MID-32A22F TT2138LS-YB11 2SK3563 PT204-6B-12 S: Souce E: Emitter D: Drain C: Collector G: Gate B: Base B C E S D G 2SC1815-GR(TPE2) 2SA1015-GR(TPE2) LA78040A 2SC2120-(O,Y)(TPE2) 2SA1175(F) 2SC3331(T,U) 2SA950(O,Y) KRA103M 2SC1627Y-TPE2 KTC3203(Y) 2SC2482 TPE6 2SC2785(F) 2SC3468(D,E)-AE BN1F4M-T KTA1267(GR) KTA1271(Y) E C B...

  • Page 54: Exploded Views

    EXPLODED VIEWS Cabinet SHINWHA TAPE SGT-730 (BLACK) V501-2 SHINWHA TAPE SGT-730 Details for L551 V501-1 (WHITE) and surrounding parts L551 V501-3 TB24 CRT CBA CLN551 L551 TB24 DG601 SCOTCH TAPE #880 W601 V501 TB26 SENSOR CBA TB10 TB21 SP801 A1-5 TB11 A1-1 MAIN CBA...
  • Page 55 Packing TAPE 1-14-3 T5553PEX...

  • Page 56: Mechanical Parts List

    MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a # Ref. No. Description Part No. have special characteristics important to safety. Before DRY BATTERY R6P UM3 or XB0M451GH001 replacing any of these components, read carefully the DRY BATTERY R6P(AR)2PX or XB0M451HU002 product safety notice in this service manual.
  • Page 57 Table 1 (V501 and L551 Combination) Ref. No. Description Part No. DEFLECTION YOKE KDY3GCE83X or LLBY00ZMS027 Note 1: Purity and Convergence Adjustments must be DEFLECTION YOKE CDY-M1456S LLBY00ZQS008 performed following CRT replacement. Refer to Electri- V501# CRT A34KPU02XX TCRT190GS016 cal Adjustment Instructions. V501-1 C.P .MAGNET JH225-FN-00 XM04000BV003...

  • Page 58: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. C208 ELECTROLYTIC CAP . 47µF/6.3V M H7 CE0KMAVSL470 Before replacing any of these components, read care- C210 CHIP CERAMIC CAP . F Z 0.47µF/10V CHD1AZB0F474 fully the product safety notice in this service manual.
  • Page 59 Ref. No. Description Part No. Ref. No. Description Part No. C323 CHIP CERAMIC CAP . F Z 2.2µF/10V CHD1AZB0F225 C572# P .P . CAP 0.33µF/200V J or CA2D334VC012 C324 CHIP CERAMIC CAP . F Z 1µF/10V CHD1AZB0F105 PP CAP . 0.33µF/250V J CT2E334MS041 C325 CHIP CERAMIC CAP .
  • Page 60 Ref. No. Description Part No. Ref. No. Description Part No. ELECTROLYTIC CAP . 3.3µF/50V M CE1JMASTL3R3 LED MIE-534A2 NPZZM1E534A2 C626 ELECTROLYTIC CAP . 4.7µF/50V M H7 CE1JMAVSL4R7 D204 LED LTL-4214M1 or NPQZLTL4214M C627 ELECTROLYTIC CAP . 47µF/35V M or CE1GMASDL470 LED LAMP 333HT/F45-50K or NPWK333HTF45 ELECTROLYTIC CAP .
  • Page 61 Ref. No. Description Part No. Ref. No. Description Part No. RECTIFIER DIODE ERB12-06 QDQZ0ERB1206 ZENER DIODE DZ-36BSAT265 NDTA00DZ36BS D604 DIODE 1N5397-B or NDLZ001N5397 D643 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 RECTIFIER DIODE ERB12-06 QDQZ0ERB1206 SWITCHING DIODE 1N4148 NDTZ001N4148 D605 DIODE 1N5397-B or NDLZ001N5397 D646 SWITCHING DIODE 1SS133(T-77) or...
  • Page 62 Ref. No. Description Part No. Ref. No. Description Part No. Q301 TRANSISTOR 2SC2785(F) or QQSF02SC2785 RESISTORS CHIP RES.(1608) 1/10W J 100 Ω TRANSISTOR KTC3199(GR) or NQS10KTC3199 R002 RRXAJB5Z0101 CHIP RES.(1608) 1/10W J 100 Ω TRANSISTOR 2SC1815-GR(TPE2) QQS102SC1815 R003 RRXAJB5Z0101 CHIP RES.(1608) 1/10W J 100 Ω Q401 TRANSISTOR 2SA1175(F) or QQSF02SA1175...
  • Page 63 Ref. No. Description Part No. Ref. No. Description Part No. CHIP RES.(1608) 1/10W J 470 Ω CHIP RES.(1608) 1/10W J 2.2k Ω R248 RRXAJB5Z0471 R426 RRXAJB5Z0222 CARBON RES. 1/4W J 3.3k Ω CARBON RES. 1/4W J 820 Ω R249 RCX4JATZ0332 R427 RCX4JATZ0821 CHIP RES.(1608) 1/10W J 1.5k Ω...
  • Page 64 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 2.2k Ω CARBON RES. 1/4W J 22k Ω R614 RCX4JATZ0222 R856 RCX4JATZ0223 CARBON RES. 1/4W J 1 Ω CHIP RES.(1608) 1/10W J 3.9k Ω R616 RCX4JATZ01R0 R857 RRXAJB5Z0392 CARBON RES.
  • Page 65 CRT CBA Ref. No. Description Part No. FUSE STC4A125V U/CT or PAGE20CW3402 Ref. No. Description Part No. FUSE 4.00A/125V PAGG20CNG402 CRT CBA ------------ FH601 FUSE HOLDER MSF-015 XH01Z00LY001 Consists of the following FH601# FUSE HOLDER FH-V-03078 XH01Z00DK001 CAPACITORS FH602 FUSE HOLDER MSF-015 XH01Z00LY001 C501 CERAMIC CAP .
  • Page 66 SENSOR CBA Ref. No. Description Part No. SENSOR CBA 0ESA04524 Consists of the following TRANSISTORS Q201 PHOTO TRANSISTOR MID-32A22F or NPWZ1D32A22F PHOTO TRANSISTOR PT204-6B-12 NPWZT2046B12 Q202 PHOTO TRANSISTOR MID-32A22F or NPWZ1D32A22F PHOTO TRANSISTOR PT204-6B-12 NPWZT2046B12 20040106 1-16-9 T5553EL...
  • Page 67 EWC1303A T5553UD 2004-01-20...

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