28LF-94H - Sharp TV Service Manual (repair manual)

28lf-94h service manual
Model
28LF-94H
Pages
72
Size
2.73 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / CTR
File
28lf-94h.pdf
Date

Read Sharp 28LF-94H Service Manual online

1
AK - 53
CHASSIS
 PAL 
B/G, I
 / SECAM 
L/L’, B/G, D/K  
SYSTEM COLOUR TELEVISION
SERVICE MANUAL
In the interests of user safety (required by safety regu-
lations in some countries) the set should be restored
to its original condition and only parts identical to
those specified should be used.
CONTENTS
TABLE OF CONTENTS ....................................................................................................... 3
INTRODUCTION .................................................................................................................. 5
CIRCUIT DESCRIPTIONS ................................................................................................... 6
INTEGRATED CIRCUIT DESCRIPTIONS ....................................................................... 12
SERVICE MODE ADJUSTMENTS ...................................................................................... 36
BLOCK DIAGRAM ................................................................................................................ 52
CIRCUIT DIAGRAMS ..................................................................................................... 54
HOW TO UPDATE THE TECHNICAL INFORMATION ...................................................... 70
SHARP  CORPORATION
SE
00
AK53CHA00
               Issued: 7
th 
July 2004
     CHASSIS
 AK-53
2
AK - 53
CHASSIS
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).
SERVICE MANUAL UPDATE LOG SHEET
Part No.
Technical Report  No.
Technical Bulletin No.
Cause / Solution
Page No.
Application
Data /Serial No.
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AK - 53
CHASSIS
TABLE OF CONTENTS
0. OVERALL BLOCK DIAGRAM ........................................................................................................... 5
1. INTRODUCTION ................................................................................................................................ 5
CIRCUIT DESCRIPTIONS...................................................................................................................... 6
2. TUNER SPECIFICATION ................................................................................................................... 6
3. IF/AUDIO&VIDEO SWITCHING/AD CONVERTER PART................................................................. 7
(PNX3000 (CALLED AS MPIF)) ............................................................................................................. 7
4. DIGITAL TV PROCESSOR (PNX300X (CALLED AS ADOC)) ......................................................... 9
5. SOUND OUTPUT STAGE WITH TDA7480L ................................................................................... 10
6. VERTICAL OUTPUT STAGE WITH TDA8177F .............................................................................. 10
7. VIDEO OUTPUT AMPLIFIER TDA6108JF ...................................................................................... 10
8. POWER SUPPLY PART ................................................................................................................... 10
9. SERIAL ACCESS 64K EEPROM ..................................................................................................... 11
10. HEADPHONE AMPLIFIER STAGE ................................................................................................ 11
11. SAW FILTER SPECIFICATION ...................................................................................................... 11
12. IC DESCRIPTIONS......................................................................................................................... 12
12.1. TDA6108JF (IC900) ................................................................................................................. 12
12.1.1. General Description ........................................................................................................... 12
12.1.2. Features ............................................................................................................................. 12
12.1.3. Pinning ............................................................................................................................... 13
12.2. PNX3000 (IC400) ..................................................................................................................... 13
12.2.1. General Description ........................................................................................................... 13
12.2.2. Features ............................................................................................................................. 13
12.2.3. Pin Description ................................................................................................................... 14
12.3. CS51033 (IC 104) .................................................................................................................... 17
12.3.1. General Description ........................................................................................................... 17
12.3.2. Features ............................................................................................................................. 17
12.3.3. Pin Description ................................................................................................................... 17
12.4. SDRAM 64MBIT (IC315) ......................................................................................................... 18
12.4.1. General Description ........................................................................................................... 18
12.4.2. Features ............................................................................................................................. 18
12.4.3. Pin Description ................................................................................................................... 18
12.5. FLASH (IC 314) ....................................................................................................................... 19
12.5.1. General Description ........................................................................................................... 19
12.5.2. Features ............................................................................................................................. 19
12.5.3. Pin/Ball Descriptions .......................................................................................................... 20
12.6. NE56610-29 (RESET IC) (IC 316) ........................................................................................... 21
12.6.1. General Description ........................................................................................................... 21
12.6.2. Features ............................................................................................................................. 21
12.6.3. Pin Description ................................................................................................................... 21
12.7. STS5PF30L (IC105) ................................................................................................................. 22
12.7.1. Description ......................................................................................................................... 22
12.7.2. Features ............................................................................................................................. 22
12.8. PNX300X (IC313) ..................................................................................................................... 22
12.8.1. General Description of the Digital One Chip System ........................................................ 22
12.8.2. Features of the ADOC Processor ...................................................................................... 23
12.9. M24C64WBN6 (IC309) ............................................................................................................ 29
12.9.1. Features ............................................................................................................................. 29
12.9.2. Description ......................................................................................................................... 29
12.10. TDA7480L (IC401,IC402) ...................................................................................................... 29
12.10.1. Description ....................................................................................................................... 29
12.10.2. Features ........................................................................................................................... 29
12.10.3. Pin Functions ................................................................................................................... 29
12.11. LM7808 (IC803) ..................................................................................................................... 30
12.11.1. Description ....................................................................................................................... 30
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CHASSIS
12.11.2. Features ........................................................................................................................... 30
12.12. LM1086 (IC103) ..................................................................................................................... 30
12.12.1. Description ....................................................................................................................... 30
12.12.2. Features ........................................................................................................................... 30
12.12.3. Connection Diagram ........................................................................................................ 31
12.13. TDA8177F (IC100) ................................................................................................................. 31
12.13.1. Description ....................................................................................................................... 31
12.13.2. Features ........................................................................................................................... 31
12.13.3. Pin connections ............................................................................................................... 31
12.13.4. Block Diagram ................................................................................................................. 32
12.14. TCET1102G (IC801) .............................................................................................................. 32
12.14.1. Description ....................................................................................................................... 32
12.14.2. Applications ..................................................................................................................... 32
12.14.3. Features ........................................................................................................................... 32
12.15. MC44608 (IC804) ................................................................................................................... 32
12.15.1. Description ....................................................................................................................... 32
12.15.2. General Features ............................................................................................................. 33
12.15.3. Pin Connections ............................................................................................................... 33
12.15.4. Pin Function description .................................................................................................. 34
12.16. TL431 (Q816) ......................................................................................................................... 34
12.16.1. Description ....................................................................................................................... 34
12.16.2. Features ........................................................................................................................... 34
12.16.3. Pin Configurations ........................................................................................................... 34
12.17. TFMS5360 .............................................................................................................................. 35
12.17.1. Description ....................................................................................................................... 35
12.17.2. Features ........................................................................................................................... 35
13. AK53 CHASSIS MANUAL ADJUSTMENTS PROCEDURE ......................................................... 35
13.1. PRELIMINARY ......................................................................................................................... 35
13.2. SYSTEM VOLTAGE ADJUSTMENTS ..................................................................................... 35
13.3. AFC ADJUSTMENTS .............................................................................................................. 35
13.4. FOCUS ADJUSTMENTS ......................................................................................................... 35
13.5. SCREEN ADJUSTMENT (VG2 ALIGNMENT) ........................................................................ 36
13.6. AGC (AUTOMATIC GAIN CONTROL) .................................................................................... 36
14. AK53 CHASSIS PRODUCTION SERVICE MODE ADJUSTMENTS ............................................ 36
14.1. OPTIONS ................................................................................................................................. 36
14.2. GEOMETRY ............................................................................................................................. 39
14.2.1. EW ALIGNMENT ............................................................................................................... 39
14.3. VIDEO ALIGNMENTS.............................................................................................................. 46
14.3.1. MAIN AGC ......................................................................................................................... 46
14.3.2. PIP AGC ............................................................................................................................ 46
14.3.3. VIDEO ADJUST ................................................................................................................. 46
14.3.3.1. WHITE DRIVE ............................................................................................................. 46
14.3.3.1.1. Normal ................................................................................................................. 46
14.3.3.1.2. Warm ................................................................................................................... 47
14.3.3.1.3. Cool ..................................................................................................................... 47
14.3.3.2. MIN BRIGHTNESS ..................................................................................................... 47
14.3.3.3. MIN CONTRAST ......................................................................................................... 47
14.3.3.4. WHITE BALANCE ADJUSTMENT .............................................................................. 47
14.3.4. COLOR ADJUSTMENT ..................................................................................................... 48
14.3.4.1. Y DEL SEC BG, Y DEL SEC DK, Y DEL SEC L, Y DEL SEC AV:.............................. 48
14.3.4.2. Y DEL PAL BG, Y DEL PAL DK, Y DEL PAL I, Y DEL PAL M, Y DEL PAL AV: .......... 48
14.3.4.3. VIDDEC QTHR, VIDDEC STHR ................................................................................. 48
14.4. SOUND RELATED OPTIONS .................................................................................................. 49
14.5. FACTORY SETTINGS.............................................................................................................. 50
15. MENU LANGUAGES ..................................................................................................................... 51
16. BLOCK DIAGRAM ......................................................................................................................... 52
17. CIRCUIT DIAGRAMS ..................................................................................................................... 54
18. HOW TO UPDATE THE TECHNICAL INFORMATION .................................................................. 70
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Download Sharp 28LF-94H Service Manual (Repair Manual)

Here you can read online and download Sharp 28LF-94H Service Manual in PDF. 28LF-94H service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp 28LF-94H CTR. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.