Hitachi 50V720 - 50" Rear Projection TV User manual

JULY 2003 HHEA-MANUFACTURING DIVISION
PA No. 0222
50C20 LC57
R/C: CLU-4362S
NTSC/ATSC LC57
Chassis
SERVICE MANUAL
CONTENTS
The electrical and mechanical parts list only lists parts that are different from Service Manual PANo. 0211.
Parts Difference Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Quick Disassembly guide ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
NOTE: If a part does not list in this addendum, please refer to Service Manual PANo. 0211. For servicing model
50C20, refer to model 50V720 (50”) in Service Manual PANo. 0211.
CAUTION: These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock
do not perform any servicing other than that contained in the operating instructions unless you are qualified to
do so.
SAFETY NOTICE
USE ISOLATION TRANSFORMER WHEN SERVICING
Components having special safety characteristics are identified by a on the schematics and on the parts list in this Service
Data and its supplements and bulletins. Before servicing the chassis, it is important that the service technician read and follow
the “Important Safety Instructions” in this Service Manual.
LCD REAR PROJECTION TELEVISION
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
!
This addendum includes all information necessary for the 50C20, except information that is the
same as the 50V720. All features/adjustments for the 50C20 are the same as the 50V720. Please refer to
Service Manual PANo. 0211 when servicing model 50C20.
Updated 02.26.07
Version 0222.01

2
LC57
PARTS DIFFERENCE TABLE
Model Name 50V720 50C20
Chassis LC57 LC57
Front cover QD50991 QD50992
Low rear cover QD36558 QD36559
Side AV jack block assembly UE25341 UE25342
-AV jack plastic PH36452 PH36453
-AV jack side terminal plate PH36801 PH36802
Mirror cover QD36144 QD36143
Mirror KS09384 KS21461
Screen frame NT05041 UX26152
Screen assembly KR03238 KR03801
Optical block assembly UX25307 UX26102
Lamp power supply (ballast) HA01631 HA01641
Lamp assembly (for service) UX21517 UX21518
Control block assembly UE25331 UE25332
Control panel plastic PH36821 PH36822
Remote control unit HL02073 (CLU-4352UG) HL02292 (CLU-4362S)
Notes:
Beside the parts difference listed above, please refer to Service Manual PA NO. 0211 for all other parts.
CH 1

LOWER REAR COVER BACK FIX METAL
①Screws T1T 4*18 P#MJ03587(17 Pcs.) ①Screws T2B 4*20 P#MJ03638(2 Pcs.)
T1T 4*18 P#MJ03587(13 Pcs.)
②Screws T2B 4*25 P#MJ03639(2 Pcs.)
③Lower Rear Cover P#QD36559
3
CABINET BRACKET
BACK FIX METAL
QUICK DISASSEMBLE GUIDEQUICK DISASSEMBLE GUIDE
TABLE OF CONTENTS

MAIN CHASSIS, SIDE AV JACK BALLAST, OPTICAL BLOCK 1
①Main Chassis P#UE24553 ①Screws T2V 4*16 P#MJ08901(2 Pcs.)
②Screws T2B 4*16 P#MJ03635(2 Pcs.) ②Lamp Power Unit(Ballast) P#HA016411
Pow Unit Holder P#NT03193
③Side AV Jack Assy P#UE35342
③Ballast FCC Sheet P#ME04511
④Screw T2B 4*16 P#MJ03635
⑤Fan Duct Assy P#UX24691
⑥Screw M3M 3*10 P#MJ03601
4
LAMP CONN. COVER
(Put Aluminum Face Down)
QUICK DISASSEMBLE GUIDEQUICK DISASSEMBLE GUIDE

OPTICAL BLOCK 2 OPTICAL BLOCK 3
①Front Cover P#QD50992①Optical Block Assy P#UE25322
②Screws T2B 4*16 P#MJ03635(2 Pcs.)
5
QUICK DISASSEMBLE GUIDEQUICK DISASSEMBLE GUIDE

DRIVE PWB
①Screw T3E 3*12 P#MJ03651(2 Pcs.)
②Lens Barrier P#ME04421
③Screw T3E 3*12 P#MJ03651
④Panel Out Ducts P#NJ22371
P#NJ22361
⑤Drive Shield P#MD09382
⑥Screw T3E 3*12 P#MJ03651(3 Pcs.)
⑦DRIVE PWB P#JP08483
6
QUICK DISASSEMBLE GUIDEQUICK DISASSEMBLE GUIDE

LOW CABINET ASSY, FRAME/MIRROR COVER ASSY SCREEN FRAME ASSY, MIRROR COVER ASSY
①Screws T2B 4*20 P#MJ03638(4 Pcs.) ①Screws T1T 4*18 P#MJ03557(14 Pcs.)
②Screws T2B 4*16 P#MJ03638(7 Pcs.)
7
MIRROR COVER ASSY
QUICK DISASSEMBLE GUIDEQUICK DISASSEMBLE GUIDE

MIRROR COVER ASSY SCREEN FRAME ASSY 1
①Screws T1T 4*25 P#MJ03589(4 Pcs.) ①Screws T2V 3*12 P#MJ03616(8 Pcs.)
T2B 3*12 P#MJ03458(4 Pcs.)
②Screws T1T 4*18 P#MJ03587(6 Pcs.)
②Tweeters P#GK01401
③Screws T1T 4*18 P#MJ03587(3 Pcs.)
③Speakers P#GK01391
④Mirror P#KS21461
④Screws T2B 3*12 P#MJ03551(3 Pcs.)
⑤Mirror Cover P#QD36143
⑤LED PWB Assy P#JT25003
8
MIRROR RETAINER
MIRROR RETAINER
MIRROR
RETAINER
QUICK DISASSEMBLE GUIDEQUICK DISASSEMBLE GUIDE

SCREEN FRAME ASSY 2 SCREEN FRAME ASSY 3
①Screws T1T 4*14 P#MJ03588(16 Pcs.) ①Screen Assy P#KR03801
②Screen Frame P#QD50982
9
SCREEN FIX
METALS
SCREEN FIX
METALS
QUICK DISASSEMBLE GUIDEQUICK DISASSEMBLE GUIDE

LAMP ASSY, CONTROL BLOCK
①Screws T2B 4*16 P#MJ03635(2 Pcs.)
②Control Block Assy P#UE25332
③Lamp Cover P#PH33036
④Lamp Assy P# UX21518
10
LOOSE THIS SCREW
LOOSE THESE
SCREWS
QUICK DISASSEMBLE GUIDEQUICK DISASSEMBLE GUIDE