Service manual

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28HW-53E

CONTENTS

SHARP CORPORATION

PAL B/G, I / SECAM L/L’, B/G, D/K SYSTEM COLOUR TELEVISION

SEJB28HW53E00

SERVICE MANUAL

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.

Issued: 17th Dec 2001

This document has been published to

be used for after sales service only.

DA-50W CHASSIS

ELECTRICAL SPECIFICATIONS......................3

IMPORTANT SERVICING NOTES....................4

ADJUSTMENTS PROCEDURES......................5

LED FLASHING CODES..................................10

PRINTED WIRING BOARDS............................11

COMPONENT LOCATION TABLES.................18

SCHEMATIC DIAGRAMS.................................24

BLOCK DIAGRAM............................................32

PARTS LISTING...............................................33

PACKING OF THE SET & ACCESSORIES.....42

CONTROLS &TERMINALS..............................43

MODEL

28HW-53E

ES/F/IT/SE

Summary of content (44 pages)

PAGE 1
28HW-53E SERVICE MANUAL SEJB28HW53E00 Issued: 17th Dec 2001 DA-50W CHASSIS PAL B/G, I / SECAM L/L’, B/G, D/K SYSTEM COLOUR TELEVISION MODEL 28HW-53EES/F/IT/SE 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 ELECTRICAL SPECIFICATIONS......................3 IMPORTANT SERVICING NOTES....................4 ADJUSTMENTS PROCEDURES......................
PAGE 2
8HW-53E SERVICE MANUAL UPDATE LOG SHEET Technical Report No. Technical Bulletin No. Cause / Solution Part No. Page No. Application 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. If you need more information, please refer to the Technical Report (Bulletin).
PAGE 3
28HW-53E ELECTRICAL SPECIFICATIONS •Power Input ...................... 220V-240 Volts AC 50Hz •Power Consumption Normal Operation ...................................88W Stand-by Operation .............................. 1.3W •Audio Power Output Rating (MPO) / Impedance Internal Left Speaker ...................... 10W, 7Ω Internal Right Speaker .................... 10W, 7Ω •Speakers Left / Right ....................................... 6 x 12cm •Convergence Static (Centre) between any two colours...........
PAGE 4
28HW-53E 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. This can be achieved by connecting a 10K resistor (with a suitably insulated lead) from the CRT cavity connector to the CRT ground tag. This must be carried out with the AC supply disconnected from the receiver.
PAGE 5
28HW-53E ADJUSTMENT PROCEDURES All adjustments to this chassis, except for focus, are carried out in the service mode. • SERVICE MODE The service mode is provided to enable the engineer to correctly set up the receiver to the CRT fitted in the set. Note that these adjustments may vary from one receiver to another. To enter the service mode, carry out the following procedure. 1. Connect a test pattern to the antenna terminal. 2. Tune the receiver to this signal. 3.
PAGE 6
28HW-53E 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. The following geometry adjustments can be carried out.
PAGE 7
28HW-53E barrel shape. • When the volume down button is pressed, side pincushion changes from pincushion to barrel shape. • Press the stand-by button on the remote control to store. Corner Symmetry Adjust the Corner Symmetry so that the picture is centred. The effect of this adjustment is shown in figure 7. 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 8
28HW-53E • When the volume down button is pressed, the vertical size of the picture decreases. • Press the stand-by button on the remote control to store. 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 9
28HW-53E G2, Cut Off and Gain Adjustments (alternative method). In the event off a Colorimeter not being available, please follow the following procedures to obtain correct G2 and Grey scale settings. 1. Tune the set to the output of a RF signal generator (cross hatch pattern). 2. In the user menu, set the picture levels to the FACTORY settings. 3. In the user menu, set the tint control to its central position. 4. Enter the service mode. 5.
PAGE 10
28HW-53E DVCO Adjustment (PAL) LED FLASHING CODES Carry out the DVCO Adjustment (PAL) as shown below: 1. Receive a Phillips pattern signal. 2. While in the DVCO ADJUSTMENT (PAL) menu, press the standby button. 3. The adjustment will be carried out automatically and stored. This model is not provided with stereo led, so to let “flashing codes” for IC failures detection when the TV set does not work, we have answered with the next solution: • The detection of failure will be made with an external LED.
PAGE 11
28HW-53E FRONTAL POWER SWITCH / AV UNIT (F7342N1A) PWB. Copper Side Component Side 24 24 1 1 2 3 ESPA¥A (H) (H) 23 T3.
PAGE 12
28HW-53E MOTHER UNIT (F7240N7A) PRINTED WIRING BOARD. Component side. 25 R778 C JF29 E C1807 D703 J67 J68 R723 JF66 JF73 K7241 L705 T701 C723 J86 J85 R727 JF28 J320 R619 C509 JF48 FB501 R553 J134 R612 D605 FB601 J326 4 5 D603 R533 R616 (AV). 20 1 JL1 JF50 2 21 4 F601 20 R611A L612 TP601 F602 JF9 1 D609 L604 Y 1 2 3 4 5 6 7 8 9 X 12 C638 JF8 0 J178 J174 R603 R608 J316 D610 R536 C648 L603 21 C611 JF51 L605 J366 D516 L611 R614 R408 JL14.
PAGE 13
28HW-53E MOTHER UNIT (F7240N7A) PRINTED WIRING BOARD. Component side.
PAGE 14
28HW-53E MOTHER UNIT (F7240N7A) PRINTED WIRING BOARD. Copper side.
PAGE 15
28HW-53E MOTHER UNIT (F7240N7A) PRINTED WIRING BOARD. Copper side.
PAGE 16
28HW-53E DYNAMIC FOCUS & PFC UNIT (F7314N3) PWB THE " " SYMBOL C1701 CAUTION C1701 T1701 K R1703 23 K D1701 23 T1701 R1702 R1701 24 R1707 24 25 THE ACTIVE SECTION IS INDICATED WITH 25 R1708 R1705 R1704 R1706 C1706 R1711 C1707 1 IC1701 J12 C1704 R1710 3 C1705 FB1701 R1713 R1712 1 + C1703 R1710 C1704 D1703 R1714 21 20 19 D1703 1 (PWA) 3 C1708 R1715 3 1 (PWB) 3 C1707 (PWB) C1702 D1702 R1709 THE ACTIVE SECTION IS INDICATED WITH THE " " SYMBOL C1708 (PWA) (
PAGE 17
28HW-53E CRT MODULE UNIT (F7273N3) PWB. Comp. Side K7273BM . F7273BMN3 L1604 CRT R1834 R1841 D1809 R5428 D5405 R1836 J70 C1811 E E B C5408 C1609 JL20.
PAGE 18
28HW-53E MOTHER UNIT (F7240N7A) PWB COMPONENT LOCATION TABLES. Component Side. 5HI 1R $ $$ $9 $9 && &9 &: (: ) )9 )9 * * + + +' . .
PAGE 19
28HW-53E MOTHER UNIT (F7240N7A) PWB COMPONENT LOCATION TABLES. Component Side.
PAGE 20
28HW-53E MOTHER UNIT (F7240N7A) PWB COMPONENT LOCATION TABLES. Copper Side.
PAGE 21
28HW-53E MOTHER UNIT (F7240N7A) PWB COMPONENT LOCATION TABLES. Copper Side.
PAGE 22
28HW-53E MOTHER UNIT (F7240N7A) PWB COMPONENT LOCATION TABLES. POWER / AV UNIT (F7342N1A) PWB COMPONENT LOCATION TABLES Copper Side.
PAGE 23
28HW-53E DINAMIC FOCUS & PFC UNIT (F7314N3) PWB COMPONENT LOCATION TABLES: Component side: Ref No (EW) Xum Yum 101600 46736 (F) (FF) 130048 38862 121158 38862 (L5) 83566 56134 (L6) 30226 54102 (PWA) 66294 57150 (PWB) 52070 57150 C1601 170688 12192 C1602 174498 12192 C1603 C1604 176276 20574 198628 38100 C1701 C1702 14732 52832 33782 9144 C1703 41402 39116 C1704 C1707 56134 20066 58928 46482 C1708 D1601 68326 40132 194818 45212 D1602 202438 45212 D1703 FB1701 61214 28956 56642 1
PAGE 24
28HW-53E DESCRIPTION OF SCHEMATIC DIAGRAM SAFETY NOTE: 1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE REPLACING PARTS. 2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS OPERATING. IMPORTANT SAFETY NOTE: PARTS MARKED WITH « ! » ( ) ARE IMPORTANT FOR MAINTAINING THE SAFETY OF THE SET. BE SURE TO REPLACE THESE PARTS WITH SPECIFIED ONES FOR MAINTAINING THE SAFETY AND PERFORMANCE OF THE SET. NOTE: 1. The unit of resistance «ohm»is omitted (K=1000 ohms.
PAGE 25
1 (H) (K) 2 3 25 4 5 A 6 Digitally signed by Adolfo Fernandez cn=Adolfo Fernandez, ou=CAD GLOBAL NETWORK, o=SHARP, c=ES Date: 2001.09.20 12:24:46 Z Reason: This document is ready for approval R5432 33 R5434 1K Q5411 2SC2412 R1815 1K Q908 2SC2412 +10V R1810 1K R1813 75 R1808 75 Q905 2SC2412 Digitally signed by Castillo, Fco. cn=Castillo, Fco., ou=SEES, o=Engineering Dept., c=ES Date: 2001.09.
PAGE 26
28HW-53E SCHEMATIC DIAGRAM OF MOTHER UNIT (K7240N7, 00 Version) Page 28 I H G F E D C B Page 27 A 1 2 3 4 26 5 6 7
PAGE 27
Digitally signed by Adolfo Fernandez cn=Adolfo Fernandez, ou=CAD GLOBAL NETWORK, o=SHARP, c=ES Date: 2001.07.23 17:34:06 Z Reason: This document is ready for approval Page 26 Digitally signed by Castillo, Fco. DN: cn=Castillo, Fco., o=Engineering Dept., ou=SEES, c=ES Date: 2001.07.24 14:06:26 +01'00' Digitally signed by Castillo, Fco. DN: cn=Castillo, Fco., o=Engineering Dept., ou=SEES, c=ES Date: 2001.07.
PAGE 28
HW-53E SCHEMATIC DIAGRAM OF MOTHER UNIT (K7240N7, 00 Version) 1 2 3 4 5 6 7 Page 29 R Q P O N M L K J Page 26 28
PAGE 29
28HW-53E SCHEMATIC DIAGRAM OF MOTHER UNIT (K7240N7, 00 Version) 9 10 11 Page28 8 12 13 14 R Q P O N M L K J 29 Page 27
PAGE 30
A 1 2 3 4 30 5 C B 6 Digitally signed by Castillo, Fco. cn=Castillo, Fco., ou=SEES, o=Engineering Dept., c=ES Date: 2001.09.20 12:19:49 Z Reason: APROBADO 1 INV 4 3 2 CS MULT COMP MODELO FECHA 7 28HW53E 20-09-2001 C1704 220pF 2KV T1701 Z0587BM C1707 22nF (630V) FZ0186 D1703 BYV28-600 1 2 3 4 ELECTRONICA ESPANA S.A. SHARP A-4 ESCALA Q K I T P 7 3 1 4 B M N 3 CODIGO 330K (TQ) (1%) NOMBRE 68K FB1701 LN0080CE R1710 .
PAGE 31
3 4 31 (HD) GN0341 1 3 C6337 10nF 2 1 OUT L 5 6 L318 3.3uH (DF) 2 1 C6429 1nF Digitally signed by Castillo, Fco. cn=Castillo, Fco., ou=SEES, o=Engineering Dept., c=ES Date: 2001.09.20 12:20:10 Z Reason: VERIFICADO (SS) GN0341 3 C6428 1nF J6401 QJAKZ0015CE 1 LUMA IN GND (CC) GN0241 Digitally signed by Castillo, Fco. cn=Castillo, Fco., ou=SEES, o=Engineering Dept., c=ES Date: 2001.09.
PAGE 32
2 3 32 4 5 6 R742 R741 Q702 C770 Q703 DRIVER C 705 IC 705 Q701 A 14 15 12 17 T 701 IC 701 IC 706 2 1 6 5 4 3 7 8 SENSOR +140V IC 707 -16V AUDIO +16V AUDIO IC 703 +5V DIGITAL IC 1001 B Q 501 E/W OUT EPROM IC 1002 Micro Proc. ST 10 R 272 L IC2 H. OUT IC 2401 SDA 5273 MT TEXT E/W DRIVE IC 503 Q602 Q 6 03 H. DRIVE M3L AV-FRONT AV-1 Micro Proc. COMUNICATION AV-2 E D 701...D 704 Micro Proc.
PAGE 33
28HW-53E PARTS LISTING REPLACEMENT PARTS Replacement parts which have special safety characteristics are identified in this manual. Electrical components having such features are identified by ! in the Replacement Part List. The use of a substitute replacement part which does not have the same safety characteristics as the factory recommended is not permitted. Replacement parts not shown in this service manual may create shock fire, or other hazards.
PAGE 34
28HW-53E REF No.
PAGE 35
28HW-53E REF No.
PAGE 36
28HW-53E ! REF No.
PAGE 37
28HW-53E REF No.
PAGE 38
28HW-53E ! ! REF No.
PAGE 39
28HW-53E ! ! REF No.
PAGE 40
28HW-53E REF No.
PAGE 41
28HW-53E ! ! REF No.
PAGE 42
28HW-53E PACKING OF THE SET Pack-ad SPAKX4077BMZZ Wrapper SPAKP2006BMZZ FRONT SPAKC5495BMZZ Carton Box Remote Control RRMCG1070BMSA Batteries UBATU0247AJZZ FRONT Carton Box 42 Operation Manual Set
PAGE 43
28HW-53E CONTROLS & TERMINALS FRONT TV 1. 2. 3. 4. 5. 6. 7. 8. Main Power On/Off Switch Power Indicator Remote Control Sensor Volume Button (DOWN) Volume Button (UP) Program Selector (DOWN) Program Selector (UP) Door 1 2 3 4 5 6 7 8 HOW TO OPEN THE DOOR Press the top of the door, opening it slightly hook your finger inside and pull open. 11 Behind the door 10. 11. 12. 13. 14. Headphone Socket (3.
PAGE 44
28HW-53E No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher. SHARP ELECTRONICA ESPAÑA S.A. TV Division Engineering Dept.