Toshiba TheaterWide 46HM95 User manual

SERVICE MANUAL
Projection Television
46HM95
52HM95
FILE NO. 023-200518
SUPPLEMENT
Published in Japan Jul. 2005 (YC)
TOSHIBA CORPORATION 2005
46HM95/52HM95 is the same as 62HM95 except for the parts tabled on back of this sheet.
Use this service manual together with the service manual of 62HM95 (File No. 020-200510).
SUMMARY
Service Manual 62HM95 is attached.
Read First
DOCUMENT CREATED IN JAPAN, July, 2005

Location Parts No. Description
No. Location Parts No. Description
No.
REPLACEMENT PARTS LIST DIFFERENCES
#1 : [46HM95]
#2 : [52HM95]
COILS & TRANSFORMERS
M601B 23103840 FERRITE CORE, TFE1013
M811A 23103778 FERRITE CORE, TFE1008
M811B 23103778 FERRITE CORE, TFE1008
M906A 23103778 FERRITE CORE, TFE1008
MB22C 23103840 FERRITE CORE, TFE1013
MB91A 23103839 FERRITE CORE, TFE1012
MC01A 23103840 FERRITE CORE, TFE1013
MJ22A 23103327 CORE, FERRITE W33X6.5X12 TFE1023
MJ60A 23103327 CORE, FERRITE W33X6.5X12 TFE1023
MV01A 23103840 FERRITE CORE, TFE1013
P801A 23103840 FERRITE CORE, TFE1013
ACCESSORIES
A701 #1 23067799 CARTON, CARTON
#2 23067800 CARTON, CARTON
A703 #1 23946773 PACKING, TOP PACKING
#2 23946771 PACKING, TOP PACKING
A708 23946768 PACKING, BOTTOM PACKING
A709 #1 23067696 CARTON, BASE TRAY
#2 23067694 CARTON, BASE TRAY
A710 #1 23946776 PACKING, SUPPORT POST
#2 23946774 PACKING, SUPPORT POST
CABINET PARTS
A184 23469392 INSULATOR, 05_LENS_GASKET
A201 #1 23533349 COVER, BEZEL PURCHASE ASM
#2 23533355 COVER, BEZEL PURCHASE ASSY
A204 #1 23532764 COVER, BACK COVER
#2 23532684 COVER, BACK COVER
A205 #1 23532783 COVER, BACKCOVER PURCHASE ASSY
#2 23532782 COVER, BACKCOVER PURCHASE ASSY
A222 23532884 COVER, PEDESTAL ASSY
A227 23940384 PIECE, TRIM TOUCH PAD
A271 #1 23405473 OPTICAL ENGINE, LV-672 TB 0A
#2 23405474 OPTICAL ENGINE, LV-672 TB 0B
K501 #1 23311135 SCREEN, 46K5M LENTICULAR SHEET
#2 23311160 SCREEN, 52K5L2 LENTI 0.265MMP
K502 #1 23311075 SCREEN, 46K4M FRESNEL SHEET
#2 23311072 SCREEN, 52K4M FRESNEL SHEET
K601 #1 23405454 MIRROR, 46G4M3
#2 23405453 MIRROR, 52G4M3

Service Manual 62HM95 begin here.

SERVICE MANUAL
Projection Television
62HM95
FILE NO. 020-200510
REVISION 2
DOCUMENT CREATED IN JAPAN, Aug., 2005
TOSHIBA CORPORATION 2005

- 2 -
TABLE OF CONTENTS
SAFETY INSTRUCTIONS .............................................................................................................................................. 3
SERVICE MODE ............................................................................................................................................................ 4
SETTING & ADJUSTING DATA...................................................................................................................................... 9
LAMP UNIT REPLACEMENT....................................................................................................................................... 10
PARTS REPLACEMENT IN LIGHT ENGINE...............................................................................................................
13
LIGHT ENGINE REPLACEMANT.................................................................................................................................
15
EXPLODED VIEW........................................................................................................................................................ 17
MECHANICAL DISASSEMBLY.................................................................................................................................... 18
CHASSIS REPLACEMENT PARTS LIST ..................................................................................................................... 19
PC BOARDS TOP AND BOTTOM VIEW ..................................................................................................................... 28
TERMINAL VIEW OF TRANSISTORS ......................................................................................................................... 48
CIRCUIT BLOCK DIAGRAM ........................................................................................................................................ 53
APPENDIX:
CIRCUIT DIAGRAM

- 3 -
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These characteristics are
often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using
replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety charac-
teristics are identified in this manual and its supplements; electrical components having such features are identified by the
international hazard symbols on the schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement
parts which do not have the same safety character istics as specified in the parts list may create shock, fire, or other hazards.
PRODUCT SAFETY NOTICE
SAFETY INSTRUCTIONS
WARNING: Service should not be attempted by anyone unfamiliar with the necessary precautions on this receiver.The following
are the necessary precautions to be observed before servicing this chassis.
1. An isolation transformer should be connected in the power line between the receiver and the AC line before any service is
performed on the receiver.
2. When replacing a chassis in the cabinet, always be certain that all the prospective devices are put back in place, such as;
non-metallic control knobs, insulating covers, shields, isolation resistor-capacitor network etc.
SAFETY PRECAUTION

- 4 -
3. SELECTING THE ADJUSTING ITEMS
1) Every pressing of CHANNEL button in the service mode changes the adjustment items in the order of table-2.
( button for reverse order)
Refer to table-1 for preset data of adjustment mode.
(See SETTING & ADJUSTING DATA on page 9)
4. ADJUSTING THE DATA
1) Pressing of VOLUME or button will change the value of data in the range from 00H to FFH. The variable range
depends on the adjusting item.
5. EXIT FROM SERVICE MODE
1) Pressing POWER button to turn off the TV once.
SERVICE MODE
1. ENTERING SERVICE MODE
MUTE
S
(Service mode display)
3) While pressing the MUTE button,
press MENU button on TV set.
2) Press MUTE button
again and keep pressing.
1) Press MUTE button twice
on Remote Control.
2. DISPLAYING THE ADJUSTMENT MENU
Adjustment mode
Press
Press
Service mode
Item
Data
S
1) Press MENU button on Remote Control.

- 5 -
6.SELF DIAGNOSTIC FUNCTION
1) Press “9” button on Remote Control during display of adjustment menu in the service mode.
The diagnosis will begin to check if interface among IC’s is executed properly.
2) During diagnosis, the following displays are shown.
1 Firmware :
Version information of microprocessor
In case of file name : HM95 and Version : 1401 indicates[HM95_1401].
2 Time : Total brightness hour of the projection lamp.(Unit : H)
3
4
Bus line : --"OK" is normal
"SCL-GND"(Red indication) : SCL-GND short circuit
"SDA-GND"(Red indication) : SDA-GND short circuit
"SCL-SDA"(Red indication) : SCL-SDA short circuit
5
Bus cont : --- "OK" is normal.
NG is abnormal(Red indication).
When type name of semiconductor indicates.
6
Block
UV : TV reception mode
V1 : VIDEO 1 input mode
V2:VIDEO 2 input mode
V3:VIDEO 3 input mode
V4: ColorStream HD-1 IN
1
2
3
4
5
6
V5:ColorStream HD-2 IN
V6:HDMI IN 1
V7:HDMI IN 2
microprocessor into the unit.
DLP :Thermal sensor values information that indicates both of nearby the projection lamp and DMD

- 6 -
7.VERSION CHECK MODE
1) Press “9” button twice on Remote Control during display of adjustment menu in the service mode. The version of main
MPU will begin to check.
2) During Version Check, the following displays are shown.
1MAIN MPU :
Version information of microprocessor
In case of file name : HM95, Version 1401 for Code Program Version
and (U15) for OSD Version indicates [HM95_1401(U15)]
2EEPROM :
Version information of EEPROM : Display 1 byte data.
3SUB MPU :
Version information of SUB MPU : Display 1 byte data.
4OPTION :
Option information : Display six numbers of 1 byte data.
5HDMI ID :
HDMI ID information : Display 4 byte data.
6DMD :
1
2
3
4
5
6
Version information of DMD optical engine : Display 1 byte data.