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Sharp 21HT-15CS Service Manual
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Sharp 21HT-15CS Service Manual

Pal secam b/g, d/k system colour television
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ELECTRICAL SPECIFICATIONS ..................... 3
IMPORTANT SERVICING NOTES .................. 4
CONTROLS & TERMINALS ............................. 5
SERVICE ADJUSTMENTS .............................. 6
HOTEL MODE FUNCTIONS .......................... 12
CHASSIS LAYOUTS .......................................14
LED FLASHING CODE ...................................15
PRINTED WIRING BOARDS ........................... 15
SHARP CORPORATION
SERVICE MANUAL
PAL SECAM
B/G, D/K
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
ICs ADDITIONAL INFORMATION ..................20
SCHEMATIC DIAGRAMS .............................. 26
BLOCK DIAGRAMS ....................................... 32
TROUBLESHOOTING TABLES ...................... 35
PARTS LISTING .............................................. 38
CRT ADAPTATION ........................................ 42
SOURCE OF DOCUMENTATION ................. 43
1
GA-1E CHASSIS
SYSTEM COLOUR TELEVISION
MODELS
21HT-15C
21HT-16C
This document has been published to
be used for after sales service only.
21HT-15C
21HT-16C
SE0021HT1*C00
Issued: 14
Nov 2002
th
S
S

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  • Page 1: Table Of Contents

    PARTS LISTING ..........38 CHASSIS LAYOUTS ........14 CRT ADAPTATION ........42 LED FLASHING CODE ........15 SOURCE OF DOCUMENTATION ....43 PRINTED WIRING BOARDS ......15 SHARP CORPORATION This document has been published to be used for after sales service only.
  • Page 2 21HT-15C 21HT-16C Service Manual update log sheet Technical Report No. Application Cause / Solution Part No. Page No. Data /Serial No. Technical Bulletin 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

    21HT-15C 21HT-16C ELECTRICAL SPECIFICATIONS Power Input ....220V-240 Volts AC 50Hz • Sound Carrier Trap • B/G ..........33.4MHz Power Consumption • D/K ..........32.4MHz Normal Operation ..43W (Method IEC60107) Stand-by Operation ........3W Adjacent Sound Carrier Trap • B/G ..........

  • Page 4: Important Servicing Notes

    21HT-15C 21HT-16C 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

    21HT-15C 21HT-16C CONTROLS & TERMINALS Remote Control Infrared Transmitter Window Aim this window at the infrared sensor on your TV set CALL ( )/CHILD LOCK ( ) button SOUND MUTE ( ) button TV/VIDEO Select button POWER/STANDBY ( ) button Single/Double Entry button ( TV/VIDEO Programme Select buttons...

  • Page 6: Service Adjustments

    The data will be stored automatically when exiting the service mode. To exit the service mode press the stand-by but- ton on the remote control or turn the receiver off with the mains switch. Fig. 2 Fig. 3 SHARP X X VXX.XX Adjustment Value...
  • Page 7 21HT-15C 21HT-16C • 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 21HT-15C 21HT-16C No. OSD Function Range Initial Default FIX/ADJ 26 HTL-PRG Hotel Program number 0...99 or > 99 for none 27 RGB OSD RGB Reference 0...15 28 SEARCH-SYS Sound system for auto turning 0(L-BG),1(BG),2(I),3(DK) 29 CUT-R Black Level off-set R [BLR] 0...63 30 CUT-G Black Level off-set G (BLG)

  • Page 9: Screen Adjustment

    21HT-15C 21HT-16C • 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. Turn the set off at the mains.
  • Page 10 21HT-15C 21HT-16C • 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 21HT-15C 21HT-16C • 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: Hotel Mode Functions

    21HT-15C 21HT-16C HOTEL MODE FUNCTIONS The following procedure details how to set up the Hotel Mode Functions. 1. Short Description 1.1. Hotel Mode “HTL”: Main Hotel Mode. It deactivates “Channel Setting” functions. It reduces the Maximum Volume. 1.2. Hotel Mode “HTL-VOL”: Maximum Volume Level Regulation. 1.3 Hotel Mode “HTL-PRG”: Fixing start up program when the TV set is switched on.
  • Page 13 21HT-15C 21HT-16C 3.2.3. Select “HTL-VOL” by using channel up/down buttons. 3.2.4. Set the value according to your necessities by using volume up/down buttons. 3.2.5. Change initial value from “0” (off ) to “1” (on). 3.2.6. Note: If you do not need to set up Hotel Mode “HTL-PRG” get out from Service Mode (To exit the Service Mode press the stand-by button on the remote control or turn the receiver off with the mains switch).

  • Page 14: Chassis Layouts

    21HT-15C 21HT-16C CHASSIS LAYOUTS Mother unit 21HS50C 21HS50F 21HS50C CRT unit...

  • Page 15: Led Flashing Code

    21HT-15C 21HT-16C LED FLASHING CODE PURPOSE: The led indicates the power mode, occurred I C error and On timer INPUT: Current power mode C Errors - On timer Processing: - If in STANDBY mode and On timer inactive then switch LED off. - If in STANDBY and On timer active set LED to blinking, (switch on and off at 1 Hz with a 50% duty cycle).

  • Page 16: 21Ht-15C

    21HT-15C 21HT-16C F 7340N7A PWB. Component side...

  • Page 17: 21Ht-15C

    21HT-15C 21HT-16C F 7340N7A PWB. Component side...

  • Page 18: 21Ht-15C

    21HT-15C 21HT-16C F 7340N7A PWB. Copper side...

  • Page 19: 21Ht-15C

    21HT-15C 21HT-16C F 7340N7A PWB. Copper side...

  • Page 20: Ics Additional Information

    21HT-15C 21HT-16C ICs ADDITIONAL INFORMATION TDA9351(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) iSIF(rms)

  • Page 21: 21Ht-15C

    21HT-15C 21HT-16C TDA9351(IC801) BLOCK DIAGRAM...

  • Page 22: 21Ht-15C

    21HT-15C 21HT-16C TDA9351(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 port 3.1 or ADC1 input P3.2/ADC2...

  • Page 23: 21Ht-15C

    21HT-15C 21HT-16C TDA9351(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) BLKIN black current input / (V-guard input, note 2) Red output...

  • Page 24: 21Ht-15C

    21HT-15C 21HT-16C 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 MGU231 high voltage safety spacer, not connected...

  • Page 25: 21Ht-15C

    21HT-15C 21HT-16C AN7523(IC303) 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 26: Schematic Diagrams

    21HT-15C 21HT-16C SCHEMATIC DIAGRAMS Description Note: Safety note: 1. The unit of resistance «ohm»is omitted (K=1000 ohms. 1. Disconnect the AC plug from the AC outlet be- M= Megaohm). fore replacing parts. 2. All resistors are 1/16 watt. unless otherwise noted. 3.

  • Page 27: 21Ht-15C

    21HT-15C 21HT-16C...

  • Page 28: 21Ht-15C

    21HT-15C 21HT-16C Schematic Diagram of Mother Unit (F7340N7A, 00 Version)

  • Page 29: 21Ht-15C

    21HT-15C 21HT-16C Schematic Diagram of Mother Unit (F7340N7A, 00 Version)

  • Page 30: 21Ht-15C

    21HT-15C 21HT-16C Schematic Diagram of Mother Unit (F7340N7A, 00 Version)

  • Page 31: 21Ht-15C

    21HT-15C 21HT-16C Schematic Diagram of CRT Unit (F7341N0, 00 Version)

  • Page 32: Block Diagrams

    21HT-15C 21HT-16C BLOCK DIAGRAMS Mother Unit...
  • Page 33 21HT-15C 21HT-16C Mother Unit...

  • Page 34: 21Ht-15C

    21HT-15C 21HT-16C CRT Unit...

  • Page 35: Troubleshooting Tables

    21HT-15C 21HT-16C 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, D703, D704, C705, Q701 Check R701,S701 and...

  • Page 36: 21Ht-15C

    21HT-15C 21HT-16C 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 37: 21Ht-15C

    21HT-15C 21HT-16C 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. Check the tuner supply voltage Does noise or signal appear LB and HB must be approx.

  • Page 38: Parts Listing

    S AA IC 0701 VHITEA1507/-1 IC TEA1507P/N1 PHILIPS S AC D 0754 RH-DX0302CEZZ DIODE UZA S AA IC 0702 RH-FX0008GEZZ P/COUPLER RANK-S SHARP S AA D 0755 RH-DX0045BMZZ DIODE 1N4148 S AA IC 0751 VHITA48M033-1 IC TA48M033F(S) TOSHIBA S AB D 0756 RH-EX0615GEZZ ZENER DIODE 5.6V...

  • Page 39: 21Ht-15C

    21HT-15C 21HT-16C REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE CF 0401 RFILC0168GEZZ SIF TRAP 5.5/6.5MHZ (MRT) S AA C 0605 VCEA0A1AW227M ELEC C 220UF 20% 10V S AA SF 0201 RFILC0291BMZZ SAW FILTER K2955M SIEMENS S AH C 0606...

  • Page 40: 21Ht-15C

    21HT-15C 21HT-16C REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE R 0532 VRD-RA2BE101J RES 100 OHM 5% 1/8W S AA RESISTORS R 0533 VRD-RA2BE393J RES 39KOHM 5% 1/8W S AA R 0201 VRD-RA2BE332J RES 3,3KOHM 5% 1/8W S AA...

  • Page 41: 21Ht-15C

    21HT-15C 21HT-16C REF No. PARTS DESCRIPTION * SN CODE EX CODE REF No. PARTS DESCRIPTION * SN CODE EX CODE R 1009 VRS-CY1JF000J S. CHIP RES. 0-OHM TAPED S AA RJ 0058 VRS-CY1JF000J S. CHIP RES. 0-OHM TAPED S AA R 1014 VRD-RA2BE101J RES 100 OHM 5% 1/8W S AA...

  • Page 42: Crt Adaptation

    21HT15C / 21HT16C CABINET PARTS C 0613 VCFPVC2DB564J PP FILM C 560NF 5% 200V S AA CCABA1352BMV0 CABINET SET 21HT15S S AT HBDGB3508BMSB SHARP BADGE S AC RESISTORS HDECQ0069BMSA DECORATION POWER S AA R 0608 VRN-RV3AB2R2J MET FILM R 2,2 OHM 5% 1W...

  • Page 43: Source Of Documentation

    21HT-15C 21HT-16C SOURCE OF DOCUMENTATION TDA9351, 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 44 SHARP ELECTRONICA ESPAÑA S.A. PRINTED BY: TV Division Think Ecology, please use Engineering Dept.

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