Sylvania SRT2232S Service Manual
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Sylvania SRT2232S Service Manual

Sylvania SRT2232S Service Manual

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SERVICE MANUAL
32" COLOR TELEVISION
SRT2232S

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  • Page 1 SERVICE MANUAL 32" COLOR TELEVISION SRT2232S...

  • Page 2: Table Of Contents

    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 de- scribed 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: Specifications

    SPECIFICATIONS <TUNER> 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 45.75 Sound 41.25 2. Peak Picture Sens dBµV CATV dBµV dBµV...

  • Page 4: 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 5 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 X- is obtained, remove and reinsert the AC power radiation protection circuits also must be recon- plug in the opposite polarity and again measure firmed each time they are serviced.
  • Page 6 Precautions during Servicing 3) Align the lengths of the wires to be connected. In- sert the wires fully into the connector. A. Parts identified by the ( # ) symbol are critical for 4) Use the crimping tool to crimp the metal sleeve at safety.
  • Page 7 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- Primary Circuit Terminals tions. Afterwards, perform the following tests and con- firm the specified values in order to verify compliance with safety standards.

  • Page 8: Standard Notes For Servicing

    STANDARD NOTES FOR SERVICING Circuit Board Indications (2) Remove the flat pack-IC with tweezers while ap- plying the hot air. a. The output pin of the 3 pin Regulator ICs is indicat- (3) Bottom of the flat pack-IC is fixed with glue to the ed as shown.
  • Page 9 With Soldering Iron: 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 all pins of the flat pack-IC. When you use solder (5) Release the flat pack-IC from the CBA using twee- flux which is applied to all pins of the flat pack-IC, zers.
  • Page 10 2. Installation Instructions for Handling Semiconductors (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 semiconductors may so you can install a replacement flat pack-IC more occur due to a potential difference caused by electro- easily.

  • Page 11: Disassembly Instructions

    CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart Note: (1) Order of steps in procedure. When reassembling, This flowchart indicates the disassembly steps for the follow the steps in reverse order.These numbers cabinet parts, and the CBA in order to gain access to are also used as the Identification (location) No.
  • Page 12 [3] Main CBA [1] Rear Cabinet Fig. 1 Fig. 3 Anode Cap [4] CRT [1] Rear Cabinet Fig. 2 Fig. 4 L6250DC...
  • Page 13 TV Cable Wiring Diagram SP802 SP801 DG691 DEGAUSSING COIL CLN802 CLN801 MAIN CBA CN801 CN802 WH301A CN691 FLYBACK TRANSFORMER TUNER T571 WH501A CN571 AC601 AC CORD FOCUS JK1501 SCREEN WH301B WH501B ANODE CN1501 Fig. 5 TO CRT GROUND L6250DC...

  • Page 14: Electrical Adjustment Instructions

    ELECTRICAL ADJUSTMENT INSTRUCTIONS 2-1. Setting for 7F, CHROMA, LAN- General Note: "CBA" is abbreviation for "Circuit Board Assem- GUAGE, STEREO TYPE, AC- bly". CESS CODE, STABLE SOUND, NOTE: COMB FILTER, COMPONENT Electrical adjustments are required after replacing and AV MEMORY data Values circuit components and certain mechanical parts.
  • Page 15 2-2. Setting for CONTRAST, 3. AFT Adjustment COLOR, TINT, V-TINT, S-TINT Purpose: To operate AFT correctly. and SHARPNESS data Values Symptom of Misadjustment: VCO does not work correctly and/or synchronization is faulty. General Test Point Adj. Point Mode Input 1. Enter the Service mode. (See page 5-1) TP303 USA 4ch 2.
  • Page 16 4. AGC Adjustment 6. Turn the power off and on again. (Main power but- ton on the TV unit.) Purpose: Set AGC (Auto Gain Control) Level. 6. V. Position Adjustment Symptom of Misadjustment: AGC does not syn- chronize correctly when RF input level is too weak and Purpose: To obtain correct vertical width of screen picture distortion may occur if it is too strong.
  • Page 17 5. Press " CH o / p " buttons on the Service remote 9. H. Size Adjustment control unit so that the monoscope pattern will be Purpose: To obtain correct horizontal size of screen 90±5% of display size and the circle is round. image.
  • Page 18 11. Cut-off Adjustment 12. White Balance Adjustment Purpose: To adjust the beam current of R, G, B, and Purpose: To mix red, green and blue beams correctly screen voltage. for pure white. Symptom of Misadjustment: White color may be Symptom of Misadjustment: White becomes bluish or reddish.
  • Page 19 13. Sub-Brightness Adjustment 14. Focus Adjustment Purpose: To get proper brightness. Purpose: Set the optimum Focus. Symptom of Misadjustment: If Sub-Brightness is Symptom of Misadjustment: If Focus Adjustment is incorrect, proper brightness cannot be obtained by incorrect, blurred images are shown on the display. adjusting the Brightness Control.
  • Page 20 4. Loosen the screw on the Deflection Yoke Clamper 16-1. Convergence Adjustment and pull the Deflection Yoke back away from the Purpose: To obtain proper convergence of red, green screen. (See Fig. 6) and blue beams. 5. Loosen the Ring Lock and adjust the Purity Mag- Symptom of Misadjustment: If Convergence Adjust- nets so that a red field is obtained at the center of ment is incorrect, the edge of white letters may have...
  • Page 21 1. Loosen the Ring Lock and align red with blue dots or Crosshatch at the center of the screen by rotat- ing (RB) C.P. Magnets. (See Fig. 7) 2. Align red / blue with green dots at the center of the screen by rotating (RB-G) C.P.

  • Page 22: Block Diagram

    BLOCK DIAGRAMS IF/Video Iuput Select Block Diagram RF/IF SIGNAL VIDEO SIGNAL AUDIO SIGNAL IC31 IF SIGNAL PROCESS CF31 VIDEO 4.5MHz TO AUDIO TU-AUDIO FILTER BLOCK DIAGRAM CF32 4.5MHz TRAP BUFFER TP301 IC781 IN PUT SELECT TUNER REAR TP303 LINE FRONT SW CTL.
  • Page 23 Video/System Control Block Diagram VIDEO SIGNAL MAIN CBA IC333 VIDEO SIGNAL PROCESS/TV MICON WF15 WH301A TO WH301B CHROMINANCE BLUE FROM IF/VIDEO C-IN DEMOD SIGNAL PROCESS RGB DRIVE INPUT SELECT TO CRT/H.V. SIGNAL OSD SW GREEN MATRIX /CUT-OFF BLOCK DIAGRAM BLOCK DIAGRAM LUMINANCE PROCESS Y-IN...
  • Page 24 Audio Block Diagram AUDIO SIGNAL IC431 MTS/SAP AUDIO SIGNAL PROCESS FROM IF/VIDEO L-CH STEREO 75uS INPUTSELECT TU-AUDIO FILTER DEMOD FILTER DE-EMPH BLOCK DIAGRAM MATRIX MATRIX DEMOD FILTER fH, 2fH WIDE BAND WIDE BAND WIDE BAND OFF SET R-CH (L-R)/SAP TRAP FILTER FILTER RMS DET EXPAND...
  • Page 25 CRT/H.V. Block Diagram VIDEO SIGNAL IC551 V-DEFLECTION CONTROL MAIN CBA WF13 WF12 THERMAL DY571 D.Y. PROTECTION V-DRIVE DRIVE PULSE WF16 DRIVE Q551, Q552 CONTROL CN571 FROM/TO VIDEO /SYSTEM CONTROL BLOCK DIAGRAM Q572 Q571 T572 Q561 VR562 VR561 H-DRIVE H.DRIVE H.OUTPUT WIDTH PROTECT1 PROTECT2...
  • Page 26 Power Supply Block Diagram CAUTION NOTE : CAUTION ! FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, Fixed voltage power supply circuit is used in this unit. The voltage for parts in hot circuit is measured using REPLACE ONLY WITH THE SAME TYPE FUSE. hot GND as a common terminal.

  • Page 27: Schematic Diagram / Cba's And Test Points

    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 compo- nents rated for higher voltage, wattage, etc. Replacement parts that have these special safety characteristics are identified in this manual and its supplements;...
  • Page 28 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. ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQES D'INCELE N'UTILISER QUE DES FUSIBLE DE MEMO TYPE. RISK OF FIRE-REPLACE FUSE AS MARKED.
  • Page 29 Main 1/4 Schematic Diagram VIDEO SIGNAL MAIN 1/4 Ref No. Position IC151 IC333 TRANSISTORS Q141 Q151 Q152 Q301 L6250SCM1...
  • Page 30 Main 2/4 Schematic Diagram IF SIGNAL VIDEO SIGNAL AUDIO SIGNAL MAIN 2/4 Ref No. Position IC31 IC771 IC801 TRANSISTORS Q701 Q702 Q721 Q751 Q761 Q791 Q792 Q793 Q794 Q851 CONNECTORS CN151 CN801 CN802 TEST POINTS TP300 TP301 TP303 L6250SCM2...
  • Page 31 Main 3/4 & CRT Schematic Diagram CAUTION FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, CAUTION ! REPLACE ONLY WITH THE SAME TYPE FUSE. NOTE : Fixed voltage power supply circuit is used in this unit. ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES THE VOLTAGE FOR PARTS IN HOT CIRCUIT IS MEASURED USING If Main Fuse (F601) is blown, check to see that all components in the power supply 4A/125V...
  • Page 32 Main 4/4 Schematic Diagram VIDEO SIGNAL AUDIO SIGNAL MAIN 4/4 Ref No. Position IC431 IC781 IC901 IC941 TRANSISTORS Q788 Q901 Q931 Q936 Q944 Q951 AA-2 Q956 Q961 Q971 TEST POINTS TP421 TP422 7-13 7-14 7-12 L6250SCM4...
  • Page 33 Main CBA Top View MAIN CBA CAUTION CAUTION ! Ref No. Position FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER Fixed voltage power supply circuit is used in this unit. REPLACE ONLY WITH THE SAME TYPE FUSE. If Main Fuse (F601) is blown, check to see that all components in the power supply SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
  • Page 34 Main CBA Bottom View CAUTION CAUTION ! FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER Fixed voltage power supply circuit is used in this unit. REPLACE ONLY WITH THE SAME TYPE FUSE. If Main Fuse (F601) is blown, check to see that all components in the power supply SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
  • Page 35 CRT CBA Top View CRT CBA Bottom View Ref No. Position TRANSISTORS Q1511 Q1512 Q1521 Q1522 Q1531 Q1532 CONNECTORS CN1501 WH301B WH501B TEST POINTS TP500 TP501 Q1511 TP500 Base TP501 Q1531 Q1521 BLUE Base Base 7-21 7-22 BL6250F01011-2...

  • Page 36: Waveforms

    WAVEFORMS 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. WF1 ~ WF16 = Waveforms to be observed at (Brightness---Center Color---Center Tint --- Center Contrast---Approx 70%) Waveform check points.

  • Page 37: Wiring Diagram

    WIRING DIAGRAM CN801 CLN801 1 SP-GND SP801 SP-L SPEAKER L-CH CN802 CLN802 1 SP-GND SP802 SP-R SPEAKER R-CH ANODE TU1 TUNER UNIT V1501 MAIN CBA BL6250F01011-1 CN691 FOCUS CN1501 T571 SCREEN WH301B WH301A CLN301 BLUE BLUE GREEN GREEN WH501B WH501A CLN501 CRT CBA HEATER 3...

  • Page 38: Ic Pin Function

    IC PIN FUNCTIONS IC333(TV Micro Computer) Signal Name Function Signal Name Function Not Used Not Used Not Used Not Used Not Used Not Used KEY-IN Key Input fsc(3.85MHz) Output AFT-IN AFT Input Black Stretch & PROTECT 1 Power Supply Protection BL-STRETCH DC Rest Filter PROTECT 2...
  • Page 39 Signal Name Function I2C-OPEN Bus-Open-Line INPUT-1 Video Control XTAL1 XTAL2 10-2 L6250PIN...
  • Page 40 EXPLODED VIEWS Cabinet SHINWHA TAPE SGT-730 V501-1 (BLACK) Details for DY551 and surrounding parts SHINWHA TAPE SGT-730 DY551 (WHITE) V501-2 Lead Clamper Lead CLN551 Clamper DY551 CRT CBA L691 Lead Clamper Lead Clamper Lead Lead Clamper Scotch Tape #880 Clamper V501 SP801 SP802...
  • Page 41 Packing POP LABEL TAPE PACKING TAPE 11-3 L6250PEX...

  • Page 42: Mechanical Parts List

    0EM000625 Warning Label which is located on the CRT. Then See CONTROL PLATE L6250UA 0EM201570 the Table 1 for V501 and DY551 combination chart. BRAND PLATE T5307UH:SYLVANIA 0EM407053 Please refer this CRT, Deflection Yoke combination REAR CABINET L6250UA 0EM000626 RATING LABEL L6250UA -------------- chart for parts order.

  • Page 43: Electrical Parts List

    ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a Ref. No. Description Part No. # have special characteristics important to safety. FILM CAP.(P) 0.01µF/50V J or CA1J103MS029 Before replacing any of these components, read care- FILM CAP.(P) 0.01µF/50V J TV or CMB1JJS00103 fully the product safety notice in this service manual.
  • Page 44 Ref. No. Description Part No. Ref. No. Description Part No. C336 FILM CAP. 0.47µF/50V J or 122Z317S C442 ELECTROLYTIC CAP. 2.2µF/50V M or CE1JMASTL2R2 TF CAP. 0.47µF/50V J CT1J474MS045 ELECTROLYTIC CAP. 2.2µF/50V M CE1JMASDL2R2 C339 CERAMIC CAP.(AX) F Z 0.01µF/25V CDA1EZT0F103 C444 ELECTROLYTIC CAP.
  • Page 45 Ref. No. Description Part No. Ref. No. Description Part No. ELECTROLYTIC CAP. 47µF/35V M CE1GMASDL470 ELECTROLYTIC CAP. 2200µF/35V M CE1GMZNDL222 C578 FILM CAP.(P) 0.01µF/50V J or CMA1JJS00103 C658# ELECTROLYTIC CAP. 1000µF/16V M(VR/HC) or CE1CMZNTL102 FILM CAP.(P) 0.01µF/50V J or CA1J103MS029 ELECTROLYTIC CAP.
  • Page 46 Ref. No. Description Part No. Ref. No. Description Part No. ELECTROLYTIC CAP. 470µF/25V M CE1EMASDL471 C928 ELECTROLYTIC CAP. 10µF/50V M or CE1JMASTL100 C802 ELECTROLYTIC CAP. 470µF/25V M or CE1EMASTL471 ELECTROLYTIC CAP. 10µF/50V M CE1JMASDL100 ELECTROLYTIC CAP. 470µF/25V M CE1EMASDL471 C929 CERAMIC CAP.(AX) F Z 0.01µF/25V CDA1EZT0F103 C806...
  • Page 47 Ref. No. Description Part No. Ref. No. Description Part No. DIODE 1SS176TPA7 1SS176T D696 SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D572# DIODE FR104-B NDLZ000FR104 SWITCHING DIODE 1N4148 or NDTZ001N4148 D573# DIODE FR104-B NDLZ000FR104 DIODE 1SS176TPA7 1SS176T D580# DIODE ERD07-15L QD4ZERD0715L D697# SWITCHING DIODE 1SS133(T-77) or QDTZ001SS133 D582...
  • Page 48 Ref. No. Description Part No. Ref. No. Description Part No. LINE FILTER JLB2808 LLBG00ZXB004 TRANSISTOR 2SC1815-GR(TPE2) QQS102SC1815 L901 INDUCTOR 22µH-J-26T or LLAXJATTU220 Q571# TRANSISTOR 2SD2553 QQWZ02SD2553 INDUCTOR 22µH-K-26T LLAXKDTKA220 Q572# TRANSISTOR 2SC1627Y-TPE2 QQSY02SC1627 L911 INDUCTOR 10µH-J-26T or LLAXJATTU100 Q601# FET 2SK3407 QFFZ02SK3407 INDUCTOR 10µH-K-26T LLAXKDTKA100...
  • Page 49 Ref. No. Description Part No. Ref. No. Description Part No. TRANSISTOR KTC3199(GR) or NQS10KTC3199 TRANSISTOR 2SA1015-GR(TPE2) QQS102SA1015 TRANSISTOR KTC3198(GR) or NQS40KTC3198 Q931 TRANSISTOR 2SC2785(F) or QQSF02SC2785 TRANSISTOR 2SC3331(T)-AANP or 2SC3331TZ TRANSISTOR 2SC2785(H) or QQSH02SC2785 TRANSISTOR 2SC3331(U)-AANP or 2SC3331UZ TRANSISTOR 2SC2785(J) or QQSJ02SC2785 TRANSISTOR 2SC1815-GR(TPE2) QQS102SC1815...
  • Page 50 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 100k Ω or CARBON RES. 1/6W J 4.7k Ω RCX4JATZ0104 RCX6JATZ0472 CARBON RES. 1/6W J 100k Ω CARBON RES. 1/4W J 4.7k Ω or RCX6JATZ0104 R152 RCX4JATZ0472 CARBON RES.
  • Page 51 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/6W J 10k Ω CARBON RES. 1/6W J 2.2k Ω RCX6JATZ0103 RCX6JATZ0222 CARBON RES. 1/4W J 100 Ω or CARBON RES. 1/4W J 2.2k Ω or R341 RCX4JATZ0101 R554 RCX4JATZ0222 CARBON RES.
  • Page 52 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/4W J 68k Ω or CARBON RES. 1/4W J 82k Ω or R593# RCX4JATZ0683 R662# RCX4JATZ0823 CARBON RES. 1/6W J 68k Ω CARBON RES. 1/6W J 82k Ω RCX6JATZ0683 RCX6JATZ0823 CARBON RES.
  • Page 53 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/6W J 2.2k Ω CARBON RES. 1/4W J 10k Ω or RCX6JATZ0222 R771 RCX4JATZ0103 CARBON RES. 1/4W J 22k Ω or CARBON RES. 1/6W J 10k Ω R709 RCX4JATZ0223 RCX6JATZ0103 CARBON RES.
  • Page 54 Ref. No. Description Part No. Ref. No. Description Part No. CARBON RES. 1/6W J 100 Ω RCX6JATZ0101 TACT SWITCH KSM0612B or SST0101HH003 CARBON RES. 1/4W J 820 Ω or R921 RCX4JATZ0821 TACT SWITCH SKHHAM SST0101AL029 CARBON RES. 1/6W J 820 Ω RCX6JATZ0821 SW102 TACT SWITCH SKQSAB or...
  • Page 55 Ref. No. Description Part No. Ref. No. Description Part No. JK702 RCA JACK 2P MSP-282V13 PBSN JXRL020LY045 X351 X'TAL 3.579545 MHz FXD355LLN003 JK703 RCA JACK 2P(SW) MSP-292V07 PBSN JYRL020LY011 JK711 Y/C JACK 1P(SW) MDC-070V1-A JYEL040LY002 CRT CBA JK721 RCA JACK(YELLOW) MTJ-032-06B-20 or JXRL010LY050 RCA JACK 1P AV-8.4-9Y JXRL010RP010...
  • Page 56 Ref. No. Description Part No. CARBON RES. 1/4W J 100 Ω or R1503 RCX4JATZ0101 CARBON RES. 1/6W J 100 Ω RCX6JATZ0101 CARBON RES. 1/4W J 150 Ω or R1508 RCX4JATZ0151 CARBON RES. 1/6W J 150 Ω RCX6JATZ0151 CARBON RES. 1/4W J 100 Ω or R1509 RCX4JATZ0101 CARBON RES.
  • Page 57 Printed in Japan 2002-04-10 HO...

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