Sharp 21HS-50N Service Manual
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Sharp 21HS-50N Service Manual

Sharp 21HS-50N Service Manual

Pal b/g system colour television
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ELECTRICAL SPECIFICATIONS .....................3
IMPORTANT SERVICING NOTES ...................4
CONTROLS & TERMINALS..............................5
SERVICE ADJUSTMENTS................................6
CHASSIS LAYOUT...........................................12
LED FLASHING CODE....................................13
SHARP CORPORATION
SERVICE MANUAL
PAL B/G SYSTEM COLOUR TELEVISION
MODELS
In the interests of user safety (required by safety
regulations in some countries) the set should restored
to its original condition and only parts identical to
those specified should be used.
CONTENTS
PRINTED WIRING BOARDS...........................13
ICs ADDITIONAL INFORMATION...................18
BLOCK DIAGRAM...........................................32
TROUBLESHOOTING TABLES......................34
PARTS LISTING.............................................37
1
SE0021HS50N00
Issued: 17th May 2002
GA-1E
CHASSIS
21HS-50N
This document has been published to
be used for after sales service only.
21HS-50N

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  • Page 1: Table Of Contents

    21HS-50N SERVICE MANUAL SE0021HS50N00 Issued: 17th May 2002 GA-1E CHASSIS PAL B/G SYSTEM COLOUR TELEVISION 21HS-50N MODELS In the interests of user safety (required by safety regulations in some countries) the set should restored to its original condition and only parts identical to those specified should be used.
  • Page 2 21HS-50N Service Manual update log sheet Technical Report No. Application Cause / Solution Part No. Page No. Technical Bulletin No. Data /Serial No. Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc. If only part number changes are required, just change part number directly the part number in the Parts Listing Section.

  • Page 3: Electrical Specifications

    21HS-50N ELECTRICAL SPECIFICATIONS • Sound Carrier Trap......32.4MHz • Power Input ....220V-240 Volts AC 50Hz • Power Consumption Normal Operation ..47W (Method IEC60107) • Adjacent Sound Carrier Trap.....40.4MHz Stand-by Operation......3W • • Audio Power Output Rating ..4W x 2(MPO) Adjacent Picture Carrier Trap...31.9MHz Speaker......16Ω...

  • Page 4: Important Servicing Notes

    21HS-50N IMPORTANT SERVICING NOTES Only qualified service personnel are allowed to carry out maintenance and repair of this receiver. Servicing of high voltage system and CRT It is important that the static charge is removed from the high voltage system when carrying out work on the receiver.

  • Page 5: Controls & Terminals

    21HS-50N CONTROL & TERMINALS Remote Control Infrared Transmitter Window Aim this window at the infrared sensor on your TV set CALL ( )/CHILD LOCK ( ) button TV/VIDEO Select button TV/VIDEO Single/Double Entry button ( POWER/STANDBY ( ) button COLOUR buttons...

  • Page 6: Service Adjustment

    21HS-50N SERVICE ADJUSTMENT • Service Mode function • All required adjustments for servicing this TV set, may be done in “service mode”, excepting G2 and FOCUS. How to access the Service Mode Turn the receiver on and ensure that it is tuned into a test pattern.
  • Page 7 21HS-50N Service adjustment and data list The table below shows the various service mode positions, range of values and default value. The columns are headed as below. Heading: Descriptions: This is what will appear on the screen at this position Function This is the description of the mode’s function...
  • Page 8 21HS-50N Function Range Initial Default FIX/ADJ HTL-VOL Max Hotel Volume 0...63 HTL-PRG Hotel Program number 0...99 or > 99 for none OSD RGB Reference 0...15 SEARCH-SYS Sound system for auto turning 0(L-BG),1(BG),2(I),3(DK) CUT-R Black Level offset R [BLR] 0...63 CUT-G Black Level offset G [BLG] 0...63...

  • Page 9: Screen Adjustment

    21HS-50N • Screen adjustment 1. G2 Adjustment Enter the service mode (see page 6). Use the channel up or channel down buttons to enter the << BLUE-BACK >> function.  “  9GF Set this to << BLUE-BACK: 0 >>, i.e. blue background is turned off.
  • Page 10 21HS-50N • Geometry adjustment procedure To adjust the geometry, follow the procedure outlined below: 1. Tune the set into a Philips test pattern. 2. Enter the service mode as described on page 6. 3. Use the channel up or channel down buttons to enter the desired mode 4.
  • Page 11 21HS-50N •Colour adjustment procedure The following adjustments should only be carried out when the CRT or IC801 are replaced. Notes: • This adjustment must be done after warming up the unit for 30 minutes or longer with a beam current over 700 µA.

  • Page 12: Chassis Layout

    21HS-50N CHASSIS LAYOUT Mother unit CRT unit...

  • Page 13: Led Flashing Code

    21HS-50N LED FLASHING CODE PURPOSE: The led indicates the power mode,ocurred I C error and On timer INPUT: - Current power mode C Errors - On timer Processing: - If in STANDBY mode and On timer in-active then switch LED off.
  • Page 14 21HS-50N F 7340N6 PRINTED WIRING BOARD. Component side...
  • Page 15 21HS-50N F 7340N6 PRINTED WIRING BOARD. Component side.
  • Page 16 21HS-50N F 7340N6 PRINTED WIRING BOARD. Copper side.
  • Page 17 21HS-50N F 7340N6 PRINTED WIRING BOARD. Copper side.

  • Page 18: Ics Additional Information

    21HS-50N ICs ADDITIONAL INFORMATION: TDA9350(IC801 QUICK REFERENCE DATA SYMBOL PARAMETER MIN. TYP. MAX. UNIT Supply − − supply voltages 8.0/3.3 − − supply current 135/60 Input voltages − − µV video IF amplifier sensitivity (RMS value) iVIFrms) − − µV QSS sound IF amplifier sensitivity (RMS value)
  • Page 19 21HS-50N TDA9350(IC801) BLOCK DIAGRAM...
  • Page 20 21HS-50N TDA9350(IC801) PINNING SYMBOL DESCRIPTION P1.3/T1 port 1.3 or Counter/Timer 1 input P1.6/SCL port 1.6 or I C-bus clock line P1.7/SDA port 1.7 or I C-bus data line P2.0/TPWM port 2.0 or Tuning PWM output P3.0/ADC0 port 3.0 or ADC0 input P3.1/ADC1...
  • Page 21 21HS-50N TDA9350(IC801) SYMBOL DESCRIPTION INSSW2 RGB / YUV insertion input R2/VIN R input / V (R-Y) input G2/YIN G input / Y input B2/UIN B input / U (B-Y) input BCLIN beam current limiter input / (V-guard input, note 2)
  • Page 22 21HS-50N TEA1507(IC701) PINNING SYMBOL PIN DESCRIPTION supply voltage ground handbook, halfpage V CC DRAIN CTRL control input input from auxiliary winding for TEA1507 demagnetization timing, OVP and OPP CTRL DRIVER programmable current sense input I sense sense DRIVER gate driver output...
  • Page 23 21HS-50N AN7523(IC303)/(IC302) Circuit Function Block Diagram Pin Descriptions Pin No. Description Ch Output (+) Ch Output (-) Standby Ch Input Volume Note: Do not apply voltage or current to NC pin from outside AN5522(IC501) Pin Descriptions Circuit Function Block Diagram Pin No.
  • Page 24 21HS-50N MSP34x5G Absolute Maximum Ratings Symbol Parameter Pin Name Min. Max. Unit ° C Ambient Operating Temperature – − 40 ° C Storage Temperature – − 0.3 First Supply Voltage AHVSUP SUP1 − 0.3 Second Supply Voltage DVSUP SUP2 − 0.3...
  • Page 25 21HS-50N MSP34x5G VREF1 DACM_L SC1_OUT_R DACM_R SC1_OUT_L VREF2 AHVSUP 33 32 31 30 29 28 27 26 25 24 23 CAPL_M RESETQ AHVSS I2S_DA_IN2 AGNDC DVSS SC2_IN_L DVSUP SC2_IN_R ADR_CL MSP 34x5G I2S_DA_IN1 SC1_IN_L I2S_DA_OUT SC1_IN_R I2S_WS VREFTOP I2S_CL MONO_IN...

  • Page 26: Schematic Diagram, Wave Forms

    21HS-50N SCHEMATIC DIAGRAM Description of Schematic Diagram Note: Safety note: 1. The unit of resistance «ohm»is omitted (K=1000 ohms. 1. Disconnect the AC plug from the AC outlet before M= Megaohm). replacing parts. 2. All resistors are 1/16 watt. unless otherwise noted.
  • Page 27 21HS-50N...
  • Page 28 21HS-50N SCHEMATIC DIAGRAM OF MOTHER UNIT (F7340N6, 00 Version)
  • Page 29 21HS-50N SCHEMATIC DIAGRAM OF MOTHER UNIT (F7340N6, 00 Version)
  • Page 30 21HS-50N SCHEMATIC DIAGRAM OF MOTHER UNIT (F7340N6, 00 Version)
  • Page 31 21HS-50N SCHEMATIC DIAGRAM OF CRT (F7341N0, 00 Version)

  • Page 32: Block Diagram

    21HS-50N CRT UNIT BLOCK DIAGRAM...
  • Page 33 21HS-50N MOTHER UNIT BLOCK DIAGRAM...

  • Page 34: Troubleshooting Tables

    21HS-50N TROUBLESHOOTING TABLES. NO RASTER Check F701 Does F701 appear blown out? Replace the fuse Check T701 pin 16 voltage. Does F701 appear blown out again? Does 290V appear at pin (16) of T701 (SMT Transf.) Check IC701, D701, D702,...
  • Page 35 21HS-50N TROUBLESHOOTING TABLES. NEITHER VERTICAL NOR HORIZONTAL SYNCHRONIZATION CIRCUIT TO BE CHECKED: Sync. Separator Circuit. Check pin33 and 34 of IC801. DEFECTIVE VERTICEL AMP. AND VERTICAL LINEARITY Readjusted vertical size. (Bass Data) Vertical linearity and size is abnormal. Check R502,R505 NO VERTICAL SCAN Check IC501 bias.
  • Page 36 21HS-50N TROUBLESHOOTING TABLES NO PICTURE, NO SOUND CIRCUITS TO BE CHECKED: Tuner. PIF. Does the noise level increase at max. Automatic Gain Control. Contrast,Brightness and Sound controls? 5V, 32V Power Source. Noise increase but no No snow noise. signal is received.

  • Page 37: Parts Listing

    IC 0701 VHITEA1507/-1 IC TEA1507P/N1 PHILIPS S AC D 0756 RH-EX0615GEZZ ZENER DIODE 5.6V S AA IC 0702 RH-FX0008GEZZ P/COUPLER RANK-S SHARP S AA D 0758 RH-DX0468CEZZ DIODE S3L20U SHINDENGEN S AA IC 0751 VHITA48M033-1 IC TA48M033F(S) TOSHIBA S AB...
  • Page 38 21HS-50N REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE CF 0401 RFILC0020CEZZ FILTER SIF TRAP (TAPED) S AE C 0599 VCKYCY1HB102K S. CHIP CAP 0.001UF/50V S AA SF 0201 RFILC0274BMZZ...
  • Page 39 21HS-50N REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE C 1013 VCKYCY1HF103Z CHIP CAP 0.01UF/50V S AA R 0455 VRD-RA2EE750J RES 75 OHM 5% 1/4W S AA C 1014 VCEA0A0JW107M ELEC C 100UF 20% 6,3V...
  • Page 40 21HS-50N REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE R 0758 VRN-VV3DB5R6J MET FILM R 5.6 OHM 5% 2W S AA RJ 0008 VRS-CY1JF000J S. CHIP RES. 0-OHM TAPED S AA...
  • Page 41 CCABA1366BMV0 CABINET SET 21HS50S S AU Q 0885 VSBF421////-1 TRT BF421 PHILIPS S AA Q 0887 VSBF421////-1 TRT BF421 PHILIPS S AA HBDGB3508BMSB SHARP BADGE S AC HDECQ0069BMSA DECORATION POWER S AA DIODES JBTN-1082BMSB BUTTON S AA D 0811 RH-DX0045BMZZ...
  • Page 42 21HS-50N DOCUMENTATION OF SOURCES. TDA9350, Philips Data Sheet: TDA935X/6X/8X PS/N2 series, TV signal processor-Teletext decoder with embedded m-Controller. Tentative Device Specification, 2001 Apr 12, Version: 2.85. TEA1507, Philips Data Sheet: TEA1507 GreenChipII SMPS controlIC. Preliminary specification, 2000Dec05. AN7523, Matsushita Electronics Corporation Specifications: AN7523 Product Specifications.
  • Page 43 21HS-50N NOTES:...
  • Page 44 SHARP ELECTRONICA ESPAÑA S.A. PRINTED BY: TV Division Think Ecology, please use Engineering Dept.

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