Hitachi 50VX915 - LCD Projection TV User manual

OCTOBER 2004 HHEA-MANUFACTURING DIVISION
PA No. 0195
50VX915 LC49
60VX915 LC49B
70VX915 LC49C
R/C: CLU-3841WL
CLU-122S
NNTTSSCCLLCC4499//BB//CC
CChhaassssiiss
SERVICE MANUAL
CONTENTS
The electrical and mechanical parts list only lists parts that are different from
Service Manual PA No. 0191
SIMPLE REMOTE CONTROL ..............................................................................................2
CIRCUIT DIAGRAMS ............................................................................................................3
EXPLODED VIEWS ............................................................................................................23
REPLACEMENT PARTS LIST ............................................................................................30
NOTE: If a part does not list in this addendum, please refer to Service Manual PA No. 0191
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 50VX915, 60VX915
and 70VX915. All features / adjustments please refer to Service Manual of
50/60VS710, 60VS810, 50/60V710/715, 42V710/715 when servicing.
Updated 12/13/2005
Updated 02/02/2005
Updated 05/23/2005
Updated 11/07/2007
Version 0195-4

2
LC49/B/C
1INSTRUCTION BOOK 2www.hitachi.us/tv 31-800-HITACHI (448-2244)
MUTE FAV CH
SELECT
VOL +
CH -
CH +
A/V NET
VOL -
MENU INPUTS
POWER
EXIT
CHANNEL/CURSOR BUTTONS
Changes the channel while watching TV, and is used as
the up (G)and down (H)cursorbuttons when navigating
through the OSD, INPUTSand AV NET menu systems.VOLUME/CURSOR BUTTONS
Adjusts the audiolevel ofyourTV, and is used as
the left (F)and right (E)cursorbuttons when
navigating the OSD, INPUTSand AV NET menu systems.
A/VNET BUTTON
Accesses the AV NET menu system.
SELECT BUTTON
Selects/Activates the highlighted menu item.
FAVORITE CHANNEL (FAVCH)BUTTON
Accesses Favorite channel mode (Green FAV OSD).
Hold down button toadd channel toFavorite Channel list
(White OSD toGreen).Hold down button todelete
channel fromFavorite Channel list (Green OSD toWhite).
INPUTS BUTTON
Accesses the INPUTSmenu system. Pressing repeatedly
will alsotoggle between INPUTSmenu items.
MENU BUTTON
Accesses the OSD menu system.
EXIT BUTTON
Exits out ofthe OSD menu systemifthe
OSD menu is displayed.
POWER BUTTON
Turns the TV on and off.
MUTE BUTTON
Reduces the audiolevel to50% ifpressed once, and
completelymutes ifpressed twice.Press it a third time to
restore the audiolevel.
The Simple Remote Control has the basic features that are most often used.
The Simple Remote Control cannot be programmed to control other devices.
SIMPLE REMOTE CONTROL

3
 All DC voltage to be measured with a tester (100k/V). Voltage taken on a complex color bar signal including a standard color bar signal.
 Since this is a basic circuit diagram, the value of the parts is subject to be altered for improvement. Signal 1 of 5
PRODUCT SAFETY NOTE: Components marked with a and shaded have special characteristics important to safety. Before replacing any of these
components, read carefully the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing.
LC49/B/C
Signal 1 of 5
BASIC CIRCUIT DIAGRAM
1 234 56
A
B
C
D
E

4
 All DC voltage to be measured with a tester (100k/V). Voltage taken on a complex color bar signal including a standard color bar signal.
 Since this is a basic circuit diagram, the value of the parts is subject to be altered for improvement. Signal 2 of 5
PRODUCT SAFETY NOTE: Components marked with a and shaded have special characteristics important to safety. Before replacing any of these
components, read carefully the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing.
LC49/B/C
Signal 2 of 5
BASIC CIRCUIT DIAGRAM
1 234 56
A
B
C
D
E

5
 All DC voltage to be measured with a tester (100k/V). Voltage taken on a complex color bar signal including a standard color bar signal.
 Since this is a basic circuit diagram, the value of the parts is subject to be altered for improvement. Signal 3 of 5
PRODUCT SAFETY NOTE: Components marked with a and shaded have special characteristics important to safety. Before replacing any of these
components, read carefully the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing.
LC49/B/C
Signal 3 of 5
BASIC CIRCUIT DIAGRAM
1 234 56
A
B
C
D
E

6
 All DC voltage to be measured with a tester (100k/V). Voltage taken on a complex color bar signal including a standard color bar signal.
 Since this is a basic circuit diagram, the value of the parts is subject to be altered for improvement. Signal 4 of 5
PRODUCT SAFETY NOTE: Components marked with a and shaded have special characteristics important to safety. Before replacing any of these
components, read carefully the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing.
LC49/B/C
Signal 4 of 5
BASIC CIRCUIT DIAGRAM
1 234 56
A
B
C
D
E

7
 All DC voltage to be measured with a tester (100k/V). Voltage taken on a complex color bar signal including a standard color bar signal.
 Since this is a basic circuit diagram, the value of the parts is subject to be altered for improvement. Signal 5 of 5
PRODUCT SAFETY NOTE: Components marked with a and shaded have special characteristics important to safety. Before replacing any of these
components, read carefully the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing.
LC49/B/C
Signal 5 of 5
BASIC CIRCUIT DIAGRAM
1 234 56
A
B
C
D
E

8
 All DC voltage to be measured with a tester (100k/V). Voltage taken on a complex color bar signal including a standard color bar signal.
 Since this is a basic circuit diagram, the value of the parts is subject to be altered for improvement. Drive 1 of 9
PRODUCT SAFETY NOTE: Components marked with a and shaded have special characteristics important to safety. Before replacing any of these
components, read carefully the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing.
LC49/B/C
Drive 1 of 9
BASIC CIRCUIT DIAGRAM
1 234 56
A
B
C
D
E

9
 All DC voltage to be measured with a tester (100k/V). Voltage taken on a complex color bar signal including a standard color bar signal.
 Since this is a basic circuit diagram, the value of the parts is subject to be altered for improvement. Drive 2 of 9
PRODUCT SAFETY NOTE: Components marked with a and shaded have special characteristics important to safety. Before replacing any of these
components, read carefully the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing.
LC49/B/C
Drive 2 of 9
BASIC CIRCUIT DIAGRAM
1 234 56
A
B
C
D
E

10
 All DC voltage to be measured with a tester (100k/V). Voltage taken on a complex color bar signal including a standard color bar signal.
 Since this is a basic circuit diagram, the value of the parts is subject to be altered for improvement. Drive 3 of 9
PRODUCT SAFETY NOTE: Components marked with a and shaded have special characteristics important to safety. Before replacing any of these
components, read carefully the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing.
LC49/B/C
Drive 3 of 9
BASIC CIRCUIT DIAGRAM
1 234 56
A
B
C
D
E