LC-20B2UA
LC-20B2UB
SERVICE MANUAL
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.
MODELS
LC-20B2UA
LC-20B2UB
CONTENTS
»
IMPORTANT SERVICE SAFETY
PRECAUTION .................................................... 2
»
SPECIFICATIONS ............................................. 5
»
OPERATION MANUAL ...................................... 6
»
DIMENSIONS .................................................... 8
»
REMOVING OF MAJOR PARTS ....................... 9
»
ADJUSTING PROCEDURE OF
EACH SECTION .............................................. 12
»
TROUBLE SHOOTING TABLE ........................ 22
»
CHASSIS LAYOUT .......................................... 26
»
BLOCK DIAGRAM ........................................... 28
»
DESCRIPTION OF SCHEMATIC DIAGRAM .. 30
»
SCHEMATIC DIAGRAM
Ë
CONTROL and RC/LED UNIT .................. 31
Ë
DIGITAL UNIT ............................................ 32
Ë
ANALOG UNIT .......................................... 42
Page
Page
Ë
INVERTER-A UNIT .................................... 46
Ë
INVERTER-B UNIT .................................... 47
»
PRINTED WIRING BOARD ASSEMBLIES ..... 48
»
PARTS LIST
Ë
ELECTRICAL PARTS ................................ 62
Ë
DIGITAL UNIT ............................................ 62
Ë
ANALOG UNIT .......................................... 67
Ë
CONTROL UNIT ........................................ 70
Ë
RC/LED UNIT ............................................ 70
Ë
INVERTER-A UNIT .................................... 70
Ë
INVERTER-B UNIT .................................... 71
Ë
CABINET AND MECHANICAL PARTS ..... 72
Ë
ACCESSORIES PARTS ............................ 74
Ë
PACKING PARTS ....................................... 74
»
PACKING OF THE SET ................................... 75
SHARP CORPORATION
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
LCD COLOR TELEVISION
OUTLINE
The 20" LCD panel used in the LC-20B2UA has been redesigned as from the April production. Accordingly, the
circuitry and the adjustment procedures have been partially changed.
This Service Manual covers all the changes.
The LC-20B2UB is a sister model with a different cabinet color.
S42I5LC20B2UB
Summary of Contents for Aquos LC 20B2UB
Page 27: ...27 LC 20B2UA LC 20B2UB 17 16 19 18 15 14 13 12 11 10 INVERTER B Unit INVERTER A Unit ...
Page 31: ...31 LC 20B2UA LC 20B2UB 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM ËCONTROL and RC LED Unit ...
Page 32: ...32 LC 20B2UA LC 20B2UB 8 7 10 9 6 5 4 3 2 1 A B C D E F G H Ë DIGITAL Unit 1 5 ...
Page 33: ...33 LC 20B2UA LC 20B2UB 17 16 19 18 15 14 13 12 11 10 ...
Page 34: ...34 LC 20B2UA LC 20B2UB 8 7 10 9 6 5 4 3 2 1 A B C D E F G H Ë DIGITAL Unit 2 5 ...
Page 35: ...35 LC 20B2UA LC 20B2UB 17 16 19 18 15 14 13 12 11 10 ...
Page 36: ...36 LC 20B2UA LC 20B2UB 8 7 10 9 6 5 4 3 2 1 A B C D E F G H Ë DIGITAL Unit 3 5 ...
Page 37: ...37 LC 20B2UA LC 20B2UB 17 16 19 18 15 14 13 12 11 10 ...
Page 38: ...38 LC 20B2UA LC 20B2UB 8 7 10 9 6 5 4 3 2 1 A B C D E F G H Ë DIGITAL Unit 4 5 ...
Page 39: ...39 LC 20B2UA LC 20B2UB 17 16 19 18 15 14 13 12 11 10 ...
Page 40: ...40 LC 20B2UA LC 20B2UB 8 7 10 9 6 5 4 3 2 1 A B C D E F G H Ë DIGITAL Unit 5 5 ...
Page 41: ...41 LC 20B2UA LC 20B2UB 17 16 19 18 15 14 13 12 11 10 ...
Page 42: ...42 LC 20B2UA LC 20B2UB 8 7 10 9 6 5 4 3 2 1 A B C D E F G H Ë ANALOG Unit 1 2 ...
Page 43: ...43 LC 20B2UA LC 20B2UB 17 16 19 18 15 14 13 12 11 10 ...
Page 44: ...44 LC 20B2UA LC 20B2UB 8 7 10 9 6 5 4 3 2 1 A B C D E F G H Ë ANALOG Unit 2 2 ...
Page 45: ...45 LC 20B2UA LC 20B2UB 17 16 19 18 15 14 13 12 11 10 ...
Page 46: ...46 LC 20B2UA LC 20B2UB 6 5 4 3 2 1 A B C D E F G H Ë INVERTER A Unit ...
Page 47: ...47 LC 20B2UA LC 20B2UB 6 5 4 3 2 1 A B C D E F G H Ë INVERTER B Unit ...
Page 49: ...49 LC 20B2UA LC 20B2UB 6 5 4 3 2 1 A B C D E F G H DIGITAL Unit Side B CONTROL Unit Side B ...
Page 51: ...51 LC 20B2UA LC 20B2UB 6 5 4 3 2 1 A B C D E F G H ANALOG Unit Side A ...