1
21LF-90N
SERVICE MANUAL
This document has been published to
be used for after sales service only.
AK- 44
CHASSIS
In the interests of user safety (required by safety
regulations in some countries) the set should be re-
stored to its original condition and only parts identi-
cal to those specified should be used.
SHARP CORPORATION
CONTENTS
ELECTRICAL SPECIFICATIONS ........................................................................................ 3
IMPORTANT SERVICING NOTES ...................................................................................... 4
CONTROLS & TERMINALS ................................................................................................ 5
PRINTED WIRING BOARD LAYOUT ................................................................................. 6
PARTS LISTING ................................................................................................................... 7
HOW TO UPDATE THE TECHNICAL INFORMATION ...................................................... 11
MODEL
21LF-90N
ES
SE
0021
LF90N00
Issued: 16
th
Feb. 2004
PAL
B/G
/ SECAM
L/L’, B/G, D/K
SYSTEM COLOUR TELEVISION
In order to service the model 21LF-90N, refer to
the AK-44 Chassis Service Manual
(SE
00
AK44CHA00).
Summary of Contents for 21LF-90N
Page 6: ...6 21LF 90N CHASSIS LAYOUT Mother Unit CRT Unit Headphone Unit ...
Page 48: ...36 AK 44 CHASSIS 1 I H G F E D C B A 2 3 4 5 6 7 18 4 Schematic Diagram of Audio Circuit ...
Page 52: ...40 AK 44 CHASSIS 1 I H G F E D C B A 2 3 4 5 6 7 18 7 Schematic Diagram of CRT Socket Circuit ...
Page 55: ...43 AK 44 CHASSIS Notes ...