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Sharp 21HM-10F Service Manual

Secam b/g, l/l' - pal b/g system colour television
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ELECTRICAL SPECIFICATION.........................3
IMPORTANT SERVICING NOTES ...................4
CONTROLS & TERMINALS..............................5
SERVICE ADJUSTMENTS................................6
CHASSIS LAYOUT...........................................12
LED FLASHING CODE....................................13
SHARP CORPORATION
SERVICE MANUAL
SECAM
- PAL
B/G, L/L'
MODEL
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...........................14
ICs ADITIONAL INFORMATION......................19
SCHEMATIC DIAGRAM, WAVE FORMS........25
BLOCK DIAGRAM...........................................32
TROUBLESHOOTING TABLES......................35
PARTS LISTING.............................................38
1
GA-1E
SYSTEM COLOUR TELEVISION
B/G
21HM-10F
This document has been published to
be used for after sales service only.
21HM-10F
SEJB21HM10F00
Issued: 31st October 2001
CHASSIS

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  • Page 1: Table Of Contents

    21HM-10F SERVICE MANUAL SEJB21HM10F00 Issued: 31st October 2001 GA-1E CHASSIS SECAM - PAL SYSTEM COLOUR TELEVISION B/G, L/L’ 21HM-10F MODEL 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: Electrical Specification

    21HM-10F ELECTRICAL SPECIFICATIONS •Sound Carrier Trap •Power Input .......220V-240 Volts AC 50Hz L’............40.4MHz L............32.4MHz •Power Consumption B/G............33.4MHz Normal Operation........43W •Adjacent Sound Carrier Trap Stand-by Operation........3W L’............32.4MHz L, B/G...........40.4MHz •Audio Power Output Rating .....4W (MPO) •Adjacent Picture Carrier Trap Ω L’............41.9MHz Speaker........16...

  • Page 3: Important Servicing Notes

    21HM-10F 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 4 21HM-10F Location of Controls Remote Control Infrared Transmitter Window Aim this window at the infrared sensor on your TV set POWER/STANDBY ( ) button TV/VIDEO TV/VIDEO Select button Programme Select buttons Single/Double Entry button ( FLASHBACK ( ) buttons Returns to previously viewed...

  • Page 5: Service Adjustments

    21HM-10F 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 6 21HM-10F • SERVICE ADJUSTMENTS AND DATA LIST The table below shows the various service mode positions, range of values and default value. The columns are headed as follows. Heading: Description: This is what will appear on the screen when at this position Function This is the description of the mode’s function...
  • Page 7 21HM-10F No. OSD Function Range Initial Default FIX/ADJ 25 HTL-VOL Max Hotel Volume 0...63 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...
  • Page 8 21HM-10F • 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 9 21HM-10F • 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.Use the volume buttons to achieve correct setting.
  • Page 10 21HM-10F •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 11: Chassis Layout

    21HM-10F CHASSIS LAYOUT SECAM UNIT 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 12: Ics Aditional Information

    21HM-10F ICs ADITIONAL INFORMATION:TDA9381 (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 13: Block Diagram

    21HM-10F ICs ADITIONAL INFORMATION:TDA9381 (IC801) BLOCK DIAGRAM...
  • Page 14 21HM-10F ICs ADITIONAL INFORMATION:TDA9381 (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/PWM0 port 3.0 or ADC0 input or PWM0 output P3.1/ADC1/PWM1...
  • Page 15 21HM-10F ICs ADITIONAL INFORMATION:TDA9381 (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 16 21HM-10F ICs ADITIONAL INFORMATION: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...
  • Page 17 21HM-10F ICs ADITIONAL INFORMATION:AN7523 (IC303) Circuit Function Block Diagram Pin Descriptions Pin No. Description Ch Output (+) Ch Output (-) Standby Ch Input GND (Input) Volume Note: Do not apply voltage or current to NC pin from outside ICs ADITIONAL INFORMATION:AN5522(IC501)
  • Page 18 21HM-10F DESCRIPTION OF SCHEMATIC DIAGRAM NOTE: SAFETY NOTE: 1. The unit of resistance «ohm»is omitted (K=1000 1. DISCONNECT THE AC PLUG FROM THE AC ohms. M= Megaohm). OUTLET BEFORE REPLACING PARTS. 2. All resistors are 1/16 watt. unless otherwise noted.
  • Page 19 21HM-10F...

  • Page 20: Troubleshooting Tables

    21HM-10F TROUBLESHOOTING TABLES. NO RASTER Check F701. Blown out. Abnormal Normal Replace the fuse. Check R701 Q701. Check T701 pin16 voltage. The fuse is again blown out. and IC701 (Approx. 290V at 220V AC) Check IC701,D701,D702, Normal D703,D704 and C705.
  • Page 21 21HM-10F 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 22 21HM-10F 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 23: Parts Listing

    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 24 21HM-10F PARTS DESCRIPTION PARTS DESCRIPTION REF No. REF No. SN CODE EX CODE SN CODE EX CODE C 0614 VCFPVC2DB564J PP FILM C 560NF 5% 200V S AA CAPACITORS C 0615 RC-EZ0724CEZZ ELEC C KMF160VB-100MMC NICHICS AA C 0201 VCEA0A1CW227M E CAPACITOR 220UF 16V 6.3x11...
  • Page 25 21HM-10F PARTS DESCRIPTION PARTS DESCRIPTION REF No. REF No. SN CODE EX CODE SN CODE EX CODE R 0306 VRS-CY1JF392J S. CHIP RES. 3.9K-OHM TAPED S AA R 0615 VRD-RA2HD472J RES 4.7KOHM 5% 1/2W S AA R 0310 VRD-RA2BE101J RES 100 OHM 5% 1/8W...
  • Page 26 21HM-10F PARTS DESCRIPTION PARTS DESCRIPTION REF No. REF No. SN CODE EX CODE SN CODE EX CODE R 1027 VRS-CY1JF101J S. CHIP RES. 100-OHM TAPED S AA P 0701 QPLGN0304CEZZ PLUG S AA P 0702 QPLGN0207CEZZ PLUG S AA R 1028...
  • Page 27 21HM-10F PARTS DESCRIPTION PARTS DESCRIPTION REF No. REF No. SN CODE EX CODE SN CODE EX CODE Q 0255 VS2SC2412KQ-1 TRT 2SC2412 ROHM S AA MISCELLANEOUS PARTS Q 0257 VS2SC2412KQ-1 TRT 2SC2412 ROHM S AA P 0251 QPLGZ0810CEZZ CONNECTOR S AA...
  • Page 28 21HM-10F GA-1E CHASSIS MODEL 21HM-10F SCHEMATIC DIAGRAM OF CRT (F7341N0, 00 Version)
  • Page 29 21HM-10F SCHEMATIC DIAGRAM OF MOTHER UNIT (F7340N4, 00 Version)
  • Page 30 SCHEMATIC DIAGRAM OF MOTHER UNIT (F7340N4, 00 Version)
  • Page 31 21HM-10F SCHEMATIC DIAGRAM OF MOTHER UNIT (F7340N4, 00 Version)
  • Page 32 21HM-10F SCHEMATIC DIAGRAM OF SECAM UNIT (F7343N0, 00 Version)

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