Sharp 28JF-73E Service Manual
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Sharp 28JF-73E Service Manual

Sharp 28JF-73E Service Manual

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PAL
B/G, I
ELECTRICAL SPECIFICATIONS ................... 3
IMPORTANT SERVICING NOTES ................. 4
CONTROLS & TERMINALS ........................... 5
ADJUSTMENT PROCEDURES ...................... 6
LED FLASHING CODES ............................... 12
PRINTED WIRING BOARDS ........................ 13
CHASSIS LAYOUT ......................................... 20

SHARP CORPORATION

SERVICE MANUAL

/ SECAM
L/L', B/G, D/K
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
ICs ADDITIONAL INFORMATION .................. 22
SCHEMATIC DIAGRAMS ............................... 32
TROUBLESHOOTING TABLES ..................... 46
PARTS LISTING ............................................. 49
PACKING OF THE SET & ACCESSORIES ... 58
SOURCE OF DOCUMENTATION .................. 59
1
GA-20
SYSTEM COLOUR TELEVISION
28JF-73E
This document has been published to
be used for after sales service only.
28JF-73E
SE0028JF73E00
Issued: 24
Sept. 2002
th
CHASSIS
ES

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Summary of Contents for Sharp 28JF-73E

  • Page 1: Table Of Contents

    28JF-73E SERVICE MANUAL SE0028JF73E00 Issued: 24 Sept. 2002 GA-20 CHASSIS / SECAM SYSTEM COLOUR TELEVISION B/G, I L/L’, B/G, D/K 28JF-73E 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 28JF-73E 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

    28JF-73E ELECTRICAL SPECIFICATIONS •Power Input ....220V-240 Volts AC 50Hz •Picture Intermediate frequency L’ ..........33.9MHz L, B/G, D/K,I ......38.9MHz •Power Consumption •Sound Carrier Trap Normal Operation (Method IEC60107) .... 77W L’ ..........40.4MHz Stand-by Operation ..........3W L, D/K ......... 32.4MHz B/G ..........

  • Page 4: Important Servicing Notes

    28JF-73E 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

    28JF-73E CONTROLS & TERMINALS HOW TO OPEN THE DOOR Lift the projection at the lower right of the door with your finger in the direction of the arrow. )URQW 79 %HKLQG WKH GRRU      5HDU 79...

  • Page 6: Remote Control

    28JF-73E REMOTE CONTROL 1. Stand-by button (TV) Video 2. Power button (VCR) 3. 0 ~ 9 digit buttons 4. Flash back button Teletext 5. GREEN button 6. RED button 7. Volume DOWN button 8. MENU button Teletext 9. REVEAL button 10.

  • Page 7: Turn The Receiver Off Using The Mains Switch

    28JF-73E • • • • • Use the channel up and down buttons to move between the options. • • • • • Use the volume control buttons to change the data. • • • • • To store the data, use the stand-by button on the remote control.
  • Page 8 28JF-73E Note that the receiver should be set to FULL MODE before carrying out any geometry adjustments. This can be achieved by pressing the widescreen mode button on the remote control until FULL MODE appears on the OSD. This can only be done out of the Service Mode.
  • Page 9 28JF-73E Corner Amplitude Adjust the Corner Amplitude so that the picture is centred. The effect of this adjustment is shown in figure 6. Note: This adjustment affects to upper and lower sides. • When the volume up button is pressed, side pincushion changes from pincushion to barrel shape.
  • Page 10 28JF-73E S Correction Adjust the S Correction so that the picture symmetrical between the top, centre and bottom. The effect of this adjustment is shown in figure 12. • When the volume up button is pressed, the top and bottom scanning increases and the centre scanning decreases.

  • Page 11: Channel Down Button

    5. If another NVM value has to be changed, use the channel down button to select the page or position and repeat as necessary. Note: DO NOT change any NVM data, unless you have been advised to do so by a Sharp representative. If data is incorrectly changed, serious damage may occur to the receiver.

  • Page 12: Led Flashing Codes

    28JF-73E DVCO Adjustment (PAL) Carry out the DVCO Adjustment (PAL) as shown below: 1. Receive a Philips pattern signal. 2. While in the DVCO ADJUSTMENT (PAL) menu, press the stand-by button. 3. The adjustment will be carried out automatically and stored.

  • Page 13: Printed Wiring Boards

    28JF-73E FB218WJN2 CRT UNIT PWB. Component side. FB218WJN2 CRT UNIT PWB. Copper side.
  • Page 14 28JF-73E FB217WJN4 MOTHER UNIT PWB. Component side.
  • Page 15 28JF-73E FB217WJN4 MOTHER UNIT PWB. Component side.

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