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Sanyo C28WP1 Service Manual

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Colour Television
PRODUCT CODE
1113 29404 (C28WP1)
1113 29401 (C28WP1B)
1113 29408 (C28WP1E)
ORIGINAL VERSION
Chassis No. WB2-A
Give complete "SERVICE REF. NO." for parts order or
servicing, it is shown on the rating sheet on the
cabinet back of the TV set.
Contents
Safety notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Pin configuration of system control, CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Chassis block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
IC block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-17
Adjustment locations on the board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18-19
Service control adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Circuit alignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Adjustments in the service mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23-25
Special functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Cabinet parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Electrical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27-48
PART No. SKSM0152
F2JE
Service Manual Model C28WP1
C28WP1B
C28WP1E
Service Ref. No. C28WP1-00
Service Ref. No. C28WP1B-00
Service Ref. No. C28WP1E-00
Note
This TV receiver will not work properly in foreign
countries where the television transmission system
and power source differ from the design specifications.
Refer to the specifications for the design specifications
(Europe)
(U.K)
(Ireland)

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  Summary of Contents for Sanyo C28WP1

  • Page 1: Table Of Contents

    Colour Television Service Manual Model C28WP1 (Europe) C28WP1B (U.K) C28WP1E (Ireland) Service Ref. No. C28WP1-00 Service Ref. No. C28WP1B-00 Service Ref. No. C28WP1E-00 PRODUCT CODE 1113 29404 (C28WP1) 1113 29401 (C28WP1B) 1113 29408 (C28WP1E) ORIGINAL VERSION Chassis No. WB2-A Note...
  • Page 2: Safety Notice

    /!\ . No deviations from resistance wattage or voltage ratings may be made for replacement items designated by mark /!\ . SPECIFICATIONS Specifications (C28WP1) (C28WP1B) (C28WP1E) Power source AC 220~240V 50Hz <--...
  • Page 3: Pin Configuration Of System Control, Cpu

    PIN CONFIGURATION OF SYSTEM CONTROL, CPU SYSTEM CONTROL IC801 IC101 M37207MB- TDA8361 Vcc +5V I DENT IDENT 4 H-SYNC CHROMA ID COLOUR 26 SANDCASTLE PLS V-SYNC KEY IN BRIGHT 17 OSD RED RC SIGNAL CONTRAST 25 OSD GREEN COLOUR Q203, SHARPNESS 14 Q204, Q205...
  • Page 4: Chassis Block Diagrams

    CHASSIS BLOCK DIAGRAMS F2JE...
  • Page 5 F2JE...
  • Page 6 F2JE...
  • Page 7 BLOCK DIAGRAM <H&V DEFLECTION> IC101 T402 VIDEO/CHROMA/DEFLECTION FLYBACK <TDA8361> Q403 H-OUTPUT HIGH T401 VOLTAGE H-DRIVE C421 C422 H-DRIVE Q402 C465 L461 Q461 Q462 C425 DELECTION C424 C426 YOKE C427 MODE SW IC423 FROM CPU HORIZ. NORMAL/ PITTARI Q421 VERT. IC521 <BA4558N>...
  • Page 8: Ic Block Diagrams

    IC BLOCK DIAGRAMS TDA8361 <IF/VIDEO/CHROMA/DEF.> F2JE...
  • Page 9 TDA4661 <1H DELAY LINE> SIGNAL ±(R-Y) CLAMPING ±(R-Y) SAMPLE- LINE AND- MEMORY colour-difference HOLD input signals addition pre-amplifiers colour-difference stages output output sugnals buffers ±(B-Y) SIGNAL CLAMPING ±(B-Y) SAMPLE- LINE AND- MEMORY HOLD analogue supply n.c. 3MHz shifting clock n.c. TDA4661 FREQUENCY n.c.
  • Page 10 TA8859AP <DEFLECTION CORRECTION> PULSE RAMP PULSE INFERFACE TRIGGER SHAPER ∫ LINEARUTY CORRECT S-C CORR. CORRECTION PALABOLA TA8859AP CORR. CORR. CORR. LA7833 <VERTICAL OUTPUT> PUMP UP VERTICAL VERTICAL DRIVE OUTPUT V-DRIVE PLS V-OUTPUT INPUT THERMAL PROTECTION LA7833 FA5311P <POWER SWITCHING CONTROLLER> BIAS UVLO FA5311P...
  • Page 11 TDA2545A <SIF DEMODULATOR> 5.5MHz 38.9MHz (5.742MHz) TDA2546A 2nd Sound IF & FM Demo. 1st Sound IF & Demodulator REF. LIMITER AMP. AMP. DEMO. DEMODU- OUTPUT LATOR INPUT MUTE LIMITER DEMO. AMP. 5.5MHz (5.742MHz) External FM demodulator TDA9821 <DUAL CHANNEL SOUND DEMODULATOR> TDA9821 5.5MHz (B/G) 7-STAGE...
  • Page 12 TDA9860 <UNIVERSAL HI-FI AUDIO PROCESSOR> IIC BUS HEADPHONE SCART MAD SDA SCL AMPLIFIER OUTPUT 25 17 16 HEADPHONE IIC BUS CHANNEL TDA9860 CONTROL VOLUME MULTIPLE SOURCE AND MODE SELECTOR SCART (CROSSBAR SWITCH) STEREO MAIN SPATIAL LOUDSPEAKER STEREO CHANNLE MUTE PSEUDE OUTPUTS STEREO REFERENCE...
  • Page 13 LA2785 <DOLBY PRO LOGIC SURROUND MATRIX DECODER> 37 36 31 30 29 42 41 40 35 34 28 27 26 25 CONTROL CTRIM MUTE NOISE RECT GENERATOR CMOTE LOG DIFF RECT DUAL 1 CONTROL RECT LOG DIFF NOISE NOISE FILTER RECT Vref.
  • Page 14 SAA7283ZP <NICAM DECODER> SAA7283ZP OP-R MIXREF DQPSK OP-L 26 24 30 31 36 37 21 20 34 33 35 39 48 43 40 41 42 50 49 51 46 44 17 3 4 11 5 REPRESENTS CONTROLLER BUS TDA9840 <STEREO/DUAL SOUND PROCESSOR> 500mV RMS 15 17 -2dB...
  • Page 15 AN5342K <VIDEO APERTURE COMPENSATOR> VM OUT DSC IN CORING DETECTOR LIMITER VM IN Y IN DELAY HOLD DIFFERENTIAL DELAY VM CONTROL CORING BIAS VM Y OUT GAIN DELAY ADDER CONTROL Y OUT GAIN GAIN LIMITER CORING ADDER CONTROL CONTROL SHARPNESS GAIN CORING ADDER...
  • Page 16 MC141625B <PAL COMB FILTER> PORT MC141625B PORT MODE1 MODE0 CLKBUF ADCLK PAL/NTSC DGnd A.C.F. DGnd PROCESSING DVcc CLKBUF CLOUT Comb/BPF Bypass IBIAS SELF BIAS -16- F2JE...
  • Page 17 M51271FP <NTSC/PAL CHROMA DEMODULATOR> 27 26 25 22 21 NTSC/PAL SYNC OUT ID KILLER SYNC SEP COMP. COMP. DEMOD. DEMOD. DET. R-Y IN BURST BURST GATE B-Y IN BURST PULSE WIDTH COMP. ACC DET. CHROMA ID PULSE 2ND AMP. COLOR CONT.
  • Page 18: Adjustment Locations On The Board

    ADJUSTMENT LOCATIONS ON THE BOARDS Main Board Grey Scale Adjustment AFT Adjustment VIF Alignment AGC Adjustment T141 VR120 H-Centre Adjustment VR361 CRT Board Q2151 Q2152 K17C Q2153 K17L Q1705 Q2781 Q2782 Q1706 BLUE OUT VR782 Q2101 Q2180 D1707 BLUE BIAS VR762 Q1711 Q2762...
  • Page 19: Focus Adjustment

    3-Lines Y/C Separation Board Y-out Adjustment Power & Deflection Board C621 C633 T611 C618 CONVERTER C624 TRANS. IC651 L633 Q615 Q633 C652 POWER Q634 Q614 DRIVE C616 POWER C651 SWITCH Q632 IC611 Q631 Q616 Q505 IC423 R426 Q501 C506 L461 IC501 Q461 VERT.
  • Page 20 IC3401 TP31B A2 STEREO DECODER T3401 X3401 TP31C IC3451 K31AA IC3121 Pilot Alignment NICAM X3151 DECODER IC3161 IC3101 Required only model C28WP1 X3461 1C3201 TP31G TP31D TP31F TP31E K34B K34A K31CC K31BB Sub Power Board Dolby +B Adjustment -20- F2JE...
  • Page 21: Service Control Adjustments

    SERVICE CONTROL ADJUSTMENTS Y-out ADJUSTMENT HIGH VOLTAGE CONFIRMATION 1. Receive PAL colour bar pattern signal. [HIGH VOLTAGE ADJUSTMENT] 2. Connect a oscilloscope to “TP-Y”(+) and “TP-E”(-). 1. Receive circular pattern signal. 3. By using VR2801, adjust amplitude “A” to be 2.0 2.
  • Page 22: Circuit Alignments

    (Side b) to be equal centre line. Input probe IC3801-pin12 Sweep ATT 10dB Marker Frequency 38.9MHz PILOT ALIGNMENT Required only model C28WP1 Adjustment SETTING Waveform Oscilloscope IC3401-pin5 By using T3401, adjust Input sound signal source amplitude to be maximum. TV system...
  • Page 23: Adjustments In The Service Mode

    ADJUSTMENTS IN THE SERVICE MODE Since some chassis circuit adjustments are controlled by the CPU built into the chassis, adjustments can now be made by inputting data directly via the remote control handset supplied with the set. Memory IC replacement Since adjustment data for the circuit is stored in the memory IC (IC802) that comes with the CPU, the adjustment data must be re-input when the memory IC is replaced.
  • Page 24: Adjustments In The Service Mode

    The adjustments in the service mode are listed below table. The data in each adjustment item is set with the best setting value in the CPU ROM as initial data. As the shaded adjustment items are adjusted for each TV set individually, it may slightly differ to the initial data. When the memory IC is replaced, these adjustments should be readjusted according to service mode adjustments described next page.
  • Page 25: Service Mode Adjustments

    Service mode adjustments V-SIZE ADJUSTMENT PINCUSHION ADJUSTMENT 1. Receive circular pattern signal. 1. Receive cross hatch pattern signal. 2. Set the TV to the service mode. 2. Set the TV to the service mode. 3. Select service item “ 1.P V-W” by pressing the 3.
  • Page 26: Special Functions

    SPECIAL FUNCTIONS This TV set allows you to set up the following special functions. Prohibition of presetting ITEM-1 Sets the prohibition of presetting and CS key entry. ITEM-1 SET 0 Start up programme position ITEM-2 Presets the programme position when the set is switched on.
  • Page 27: Cabinet Parts List

    Service Ref. No. C28WP1-00/ C28WP1B-00/C28WP1E-00 CABINET PARTS LIST Note: Parts order must contain Service Ref. No., Part No., and descriptions. MENU SURROUND BASS -/-- WIDE Part No. Description Part No. Description CABINET PARTS CHASSIS PARTS 610 262 8425 ASSY,CABINET FR A-F2JE...
  • Page 28: Electrical Parts List

    Ref. No. Chassis Construction: Read description in the Capacitor and Resistor as follows: CAPACITOR Model :C28WP1 CERAMIC 100P K 50V Service Ref. No. C28WP1-00 Rated Voltage Tolerance Symbols: 1AA0B10E188A0 ASSY,PWB,CRT F2JE Less than 10PF 1AA0B10E27600 ASSY,PWB,FRONT F2JE A: Not specified B: ±0.1PF C: ±0.25PF...
  • Page 29 Ref. No. Part No. Description Part No. Description Ref. No. 610 261 9942 ASSY,PWB,CRT F2JE 405 011 8500 TR 2SC1740S-R 405 011 8609 TR 2SC1740S-S 1AA0B10E188A0 405 012 2002 TR 2SC1815-GR 405 012 2101 TR 2SC1815-O 405 012 2309 TR 2SC1815-Y TRANSISTOR 405 019 1909 TR 2SC536-E-NP...
  • Page 30 Description Ref. No. Part No. Ref. No. Part No. Description 405 012 2002 TR 2SC1815-GR R2766 401 064 9907 OXIDE-MT 10K JA 405 012 2101 TR 2SC1815-O R2768 401 009 1508 CARBON 2.7K JA 1/2W 405 012 2309 TR 2SC1815-Y R2772 401 027 2303 CARBON...
  • Page 31 Ref. No. Part No. Description Part No. Description Ref. No. 405 019 2708 TR 2SC536-F-NP L1106 645 001 4567 INDUCTOR,10U K 405 019 3804 TR 2SC536-G-NP DIODE 405 020 7501 TR 2SC945A-PA D1102 407 005 4505 DIODE DS442X Q1901 405 011 7404 TR 2SC1740-R 407 013 1206 DIODE 1S1555...
  • Page 32 Description Ref. No. Part No. Ref. No. Part No. Description Q1633 405 023 4903 TR 2SD400-D-MP R1609 401 024 7400 CARBON 10K JA 1/6W 405 023 5009 TR 2SD400-E-MP R1610 401 025 3807 CARBON 180 JA 1/6W 405 023 5306 TR 2SD400-F-MP R1611 401 065 0804...
  • Page 33 Ref. No. Part No. Description Part No. Description Ref. No. D603 407 006 6300 DIODE ERC05-10B 405 012 2002 TR 2SC1815-GR 407 009 6901 DIODE RM11C 405 019 2708 TR 2SC536-F-NP D604 407 006 6300 DIODE ERC05-10B 405 019 3804 TR 2SC536-G-NP 407 009 6901 DIODE RM11C...
  • Page 34 Description Ref. No. Part No. Ref. No. Part No. Description C481 403 106 4604 ELECT 33U M 250V R474 401 027 0309 CARBON 47K JA 1/6W C482 403 233 0302 ELECT 100U M R475 401 027 5205 CARBON 680 JA 1/6W C486 403 233 0609...
  • Page 35 Ref. No. Part No. Description Part No. Description Ref. No. R658 401 026 6906 CARBON 3.9K GA 1/6W D615 407 171 0905 DIODE RU4YX-S D616 407 129 7000 DIODE RU4AM LF-L1 TRANSFORMER D617 407 007 9904 DIODE GMA01 407 012 4406 DIODE 1SS133 T401 610 000 1138...
  • Page 36 Description Ref. No. Part No. Ref. No. Part No. Description 405 002 6706 TR 2SA1179-M6-TA 403 179 0305 POLYESTER 6800P K Q134 406 000 6804 TR 2SA1015-GR(SAN) C006 403 233 0609 ELECT 47U M 405 001 7407 TR 2SA1015-O(SAN) C007 403 233 0609 ELECT 47U M...
  • Page 37 Ref. No. Part No. Description Part No. Description Ref. No. C216 403 201 5001 ELECT 330U M R126 401 038 7700 MT-GLAZE 5.6K JA 1/10W C218 403 014 9203 CERAMIC 180P J R127 401 037 5202 MT-GLAZE 100 JA 1/10W C221 403 068 0409 CERAMIC...
  • Page 38 Description Ref. No. Part No. Ref. No. Part No. Description R373 401 025 8208 CARBON 22K JA 1/6W R891 401 037 8005 MT-GLAZE 15K JA 1/10W R373A 401 024 9305 CARBON 1.2K JA 1/6W R892 401 037 8005 MT-GLAZE 15K JA 1/10W R374 401 025 8208 CARBON...
  • Page 39 Ref. No. Part No. Description Part No. Description Ref. No. D241 407 004 8009 DIODE DSB015-TA INTEGRATED CIRCUIT D275 407 053 6407 ZENER DIODE MTZ5.1C IC1301 409 018 3902 IC LA6393D 407 056 8200 ZENER DIODE RD5.1EB3 IC1302 409 301 2803 IC MN1381-Q 407 163 8209 ZENER DIODE UZ-5.1BCC...
  • Page 40 Description Ref. No. Part No. Ref. No. Part No. Description C2106 403 069 9500 CERAMIC 0.01U Z R2022 401 038 3504 MT-GLAZE 330 JA 1/10W C2108 403 028 4102 CERAMIC 56P J R2023 401 038 2002 MT-GLAZE 270 JA 1/10W C2501 403 248 1905 ELECT...
  • Page 41 Ref. No. Part No. Description Part No. Description Ref. No. R2526 401 037 5400 MT-GLAZE 1K JA 1/10W C1023 403 009 5708 CERAMIC 100P J R2527 401 038 3702 MT-GLAZE 33K JA 1/10W C1024 403 041 9405 ELECT 10U M C1025 403 069 1702 CERAMIC...
  • Page 42 Description Ref. No. Part No. Ref. No. Part No. Description R1203 401 037 5608 MT-GLAZE 10K JA 1/10W 407 063 8309 ZENER DIODE MTZJ11C R1204 401 037 5608 MT-GLAZE 10K JA 1/10W D1026 407 075 9905 ZENER DIODE EQA03-11A R1205 401 038 0701 MT-GLAZE 2.2K JA 1/10W...
  • Page 43 Ref. No. Part No. Description Part No. Description Ref. No. 610 262 4717 ASSY,PWB,NICAM/DOLBY C3169 403 257 0807 ELECT 0.47U M C3171 403 310 6302 ELECT 4.7U K F2JE1AA0B10E28100B C3172 403 257 0807 ELECT 0.47U M C3173 403 310 6302 ELECT 4.7U K C3174...
  • Page 44 Description Ref. No. Part No. Ref. No. Part No. Description C3452 401 037 5004 MT-GLAZE 0.000 ZA 1/10W R3463 401 037 5608 MT-GLAZE 10K JA 1/10W C3458 403 073 3501 CERAMIC 390P K R3464 401 038 6505 MT-GLAZE 47K JA 1/10W C3461 403 069 9500 CERAMIC...
  • Page 45 Ref. No. Part No. Description Part No. Description Ref. No. IC2931 409 241 5407 IC BA178M05T L2905 645 001 4567 INDUCTOR,10U K 409 172 1509 IC MC78M05CT L2908 645 001 4567 INDUCTOR,10U K 409 320 5700 IC UPC78M05AHF DIODE CAPACITOR D2901 407 055 7907 ZENER DIODE RD3.6EL...
  • Page 46 Description Ref. No. Part No. Ref. No. Part No. Description 405 014 4608 TR 2SC2412K-S C2840 403 070 2606 CERAMIC 0.1U Z 405 015 8704 TR 2SC2812-L6-TA C2841 403 248 1608 ELECT 47U M 405 015 8902 TR 2SC2812-L7-TA C2842 403 025 1609 CERAMIC 4P C...
  • Page 47 MT-GLAZE 1M JA 1/10W The below units are completely same with R2857 401 037 6209 MT-GLAZE 11K JA 1/10W model C28WP1, refere to part list Service R2858 401 038 0206 MT-GLAZE 20K JA 1/10W Ref No. C28WP1-00. R2859 401 037 5608...
  • Page 48 None R3814 None R3815 None R3845 None R3846 None X3801 421 002 4405 SAW F TSB5303 X3811 None X3814 None OUT OF CIRCUIT BOARD / ! \ W901 645 011 8838 ASSY,CORD,POWER -48- SANYO Industries (U.K) Ltd. Printed in UK...

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