Toshiba TheaterWide 56HM195 User manual

SERVICE MANUAL
Projection Television
56HM195
62HM195
72HM195
FILE NO. 020-200523GR
Published in Japan Sep. 2005 (YC)
TOSHIBA CORPORATION 2005
The above models are classified as green products (*1), as indicated by the underlined serial numbers. This Service Manual
describes replacement parts for the green products. When repairing these green products, use the parts described in this
manual and lead-free solder (*2).
For (*1) and (*2), see the next page.

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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.................................................................................................................................
14
EXPLODED VIEW........................................................................................................................................................ 17
MECHANICAL DISASSEMBLY.................................................................................................................................... 18
CHASSIS REPLACEMENT PARTS LIST ..................................................................................................................... 19
PC BOARDS TOP AND BOTTOM VIEW ..................................................................................................................... 29
TERMINAL VIEW OF TRANSISTORS ......................................................................................................................... 47
CIRCUIT BLOCK DIAGRAM ........................................................................................................................................ 52
APPENDIX:
CIRCUIT DIAGRAM
(*1) GREEN PRODUCT PROCUREMENT
The EC is actively promoting the WEEE & RoHS Directives that define standards for recycling
and reuse of Waste Electrical and Electronic Equipment and for the Restriction of the use of
certain Hazardous Substances. From July 1, 2006, the RoHS Directive will prohibit any
marketing of new products containing the restricted substances.
Increasing attention is given to issues related to the global environmental. Toshiba Corporation
recognizes environmental protection as a key management tasks, and is doing its utmost to
enhance and improve the quality and scope of its environmental activities. In line with this,
Toshiba proactively promotes Green Procurement, and seeks to purchase and use products,
parts and materials that have low environmental impacts.
Green procurement of parts is not only confined to manufacture. The same green parts used in
manufacture must also be used as replacement parts.
(*2) LEAD-FREE SOLDER
This product is manufactured using lead-free solder as a part of a movement within the consumer
products industry at large to be environmentally responsible. Lead-free solder must be used in the
servicing and repair of this product.
WARNING
This product is manufactured using lead free solder.
DO NOT USE LEAD BASED SOLDER TO REPAIR THIS PRODUCT !
The melting temperature of lead-free solder is higher than that of leaded solder by 86°F to 104°F
(30°C to 40°C). Use of a soldering iron designed for lead-based solders to repair product made
with lead-free solder may result in damage to the component and or PCB being soldered. Great
care should be made to ensure high-quality soldering when servicing this product especially
when soldering large components, through-hole pins, and on PCBs as the level of heat
required to melt lead-free solder is high.

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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

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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
(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
1) Press MENU button on Remote Control.

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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.
Firmware :
Version information of microprocessor
In case of file name : HM195 and Version : 1401 indicates[HM195_1401].
Time : Total brightness hour of the projection lamp.(Unit : H)
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
Bus cont : --- "OK" is normal.
NG is abnormal(Red indication), when type name of semiconductor indicates.
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
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
1
2
3
4
5
6
1
2
3
4
5
6

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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.
1
2
3
4
5
6
7
8
MAIN MPU :
Version information of microprocessor
In case of file name : HM195, Version 1401 for Code Program Version
and (U15) for OSD Version indicates [HM195_1401(U15)]
EEPROM :
Version information of EEPROM : Display 1 byte data.
SUB MPU :
Version information of SUB MPU : Display 1 byte data.
OPTION :
Option information : Display six numbers of 1 byte data.
HDMI ID :
HDMI ID information : Display 4 byte data.
DMD :
Version information of DMD optical engine : Display 1 byte data.
MALIBU :
MALIBU information : Display two numbers of 1 byte data.
MALIBU STATUS :
MALIBU STATUS information : Display four numbers of 1 byte data.
1
2
3
4
5
6
7
8

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8.STATUS CHECK MODE
1) Press “9” button thrice on Remote Control during display of adjustment menu in the service mode. The status of this
model will begin to check.
2) During Status Check, the following displays are shown.
MAIN :
Main source information :
Display RF position number (1- 135) on the main screen, or Input Source (HDMI1/2, DVI, AUDIO etc.)
MAIN FORMAT :
Display Video and PC format information
MAIN PLL :
Main PLL information : Display 1 byte data at five.
SCREEN SIZE :
Display the screen size as follows.
OTHER STATUS :
Other status information : Display three numbers of 2 byte data.
Theater Wide 1
Theater Wide 2
Theater Wide 3
FULL
NATURAL
1
2
3
4
5
1
2
3
4
5

– 8 –
LED
Yellow blinks continuously at 3-
second intervals.
Blue blinks continuously at 0.5-
second intervals.
Yellow blinks continuously at 0.5-
second intervals;
Blue is ON (solid).
Yellow and Blue blink continu-
ously at 1-second intervals.
Yellow is OFF;
Blue blinks at 0.2-second inter-
vals 4 times (repeat).
Yellow is OFF;
Blue blinks continuously at 0.5-
second intervals.
Yellow is OFF;
Blue blinks continuously at 1-
second intervals.
Yellow is OFF;
Blue blinks at 0.2-second inter-
vals 3 times (repeat).
1
2
3
4
5
6
7
Condition
The lamp unit door is not seated
properly.
The lamp is not working properly.
The lamp is not working properly
after the eighth automatic restart
(see item #2).
An abnormal temperature
increase has occurred.
Abnormal operation
(including cooling fan stop).
Abnormal operation of BUS line.
The color wheel has stopped.
Solution
Turn OFF the TV and unplug the power cord.
Review “How to replace the lamp unit” on
pages 10–12 to ensure that the lamp door is
installed securely.
The TV will automatically try to restart itself
eight times (see item #3).
Turn the TV OFF and then ON again. If the
problem persists, replace the lamp unit (see
pages 10–12).
Turn OFF the TV. Check to make sure all
slots and openings in the TV cabinet are not
covered, blocked, or dusty. Turn ON the TV
again. If the problem persists, contact a
Toshiba Authorized Service Center.
Turn OFF the TV and unplug the power cord.
Plug the power cord in again and turn ON
the TV.
Turn OFF the TV and unplug the power cord.
Plug the power cord in again and turn ON
the TV.
Turn OFF the TV and unplug the power cord.
Plug the power cord in again and turn ON
the TV.
9. LED indications
The yellow and blue LED lights on the TV (at the bottom cen-
ter of the TV) indicate the TV’s status, as described below:
´ Blue ON (solid) and Yellow OFF = The TV power cord is
plugged in.
´ Yellow ON (solid) and Blue OFF = A recording is in
progress while the TV is OFF.
´ Blue ON (solid) and Yellow ON (solid) = A recording is in
progress while the TV is ON.
Yellow and/or Blue blinking (see table below).
Note: If the TV loses A/C power (e.g., a power outage oc-
curs or the power cord is unplugged), when power is
restored, the yellow LED will blink while the TV is
booting until the remote control is usable. This is
normal and is not a sign of malfunction.
Blue LED
Yellow LED
TV front

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SETTING & ADJUSTING DATA
SERVICE MODE
ADJUSTING ITEMS AND DATA INTHE SERVICE MODE:
Table-1
Note:
The image system data of ∗ mark items are different by each image format.
The RF-Signal value is indicated in the table.
Retention the HPOS and VPOS data to EEPROM of Malibu.
Retention the CWDH and CWDL data to EEPROM of DMD.
Item Name of adjustment Preset Data
RCUT R CUT OFF
GCUT G CUTOFF
BCUT B CUT OFF
GDRV G DRIVE
BDRV B DRIVE
RDRV R DRIVE
∗
BRTC
BRIGHTNESS CENTER
∗
COLC COLOR CENTER
∗
UVTT BASE BAND TINT
∗
CNTX CONTRAST MAX
VPOS V-POSITION
CWDH COLOR WHEEL DELAY (HIGH)
CWDL COLOR WHEEL DELAY (LOW)
DMDB DMD BIAS
OPT1 TV SET OPTION 1
00H
00H
00H
80H
80H
80H
FDH
C8H
FEH
80H
00H
00H
74H
03H
74H
CNTCG G CONTRAST CENTER
CNTCR R CONTRAST CENTER
CNTCB B CONTRAST CENTER
64H
64H
64H
HPOS H-POSITION 00H
14H
03H
0FH
05H
14H
04H
Item Name of adjustment Preset Data
PLLW0 PLL WAIT TIME
PLLW1 PLL WAIT TIME
00H
01H
OPT2 TV SET OPTION 2
OPT3 TV SET OPTION 3
PLLW2 PLL WAIT TIME
PLLW3 PLL WAIT TIME
PLLW4 PLL WAIT TIME
PLLW5 PLL WAIT TIME

LAMP UNIT REPLACEMENT
The light source for this TV is a mercury lamp with internal atmospheric
pressure that increases during use. The lamp has a limited service life
that varies depending on user settings. If you use the lamp beyond its
service life:
you may notice a reduction in the colors and/or brightness of the pic-
ture; and
.
.
.
.
.
the strength of the quartz glass in the lamp will be reduced and the
lamp may rupture (often making a loud noise when this happens). If
the lamp reputres, the TV will not operate until the lamp unit is replaced.
Note: The lamp unit is designed so broken lamp glass remains se-
curely inside the lamp unit.
CAUTION: Always handle the lamp unit with care.
The lamp unit in this TV was designed for safe replace-
ment by consumers; however, if the lamp unit is subjected to inten-
tional abuse (such as excessive mechanical abuse or handling by
children or pets), the unit may break, exposing edges or pinch points.
When to replace the lamp unit
You should replace the lamp unit:
if the picture darkens and/or colors fade;
if the lamp does not light; or
If you hear a loud noise and the picture goes black, which may indi-
cate a lamp rupture (LED indication #8). See LED indications on
page 6.
Cautions when replacing LAMP UNIT (E998Z; PJ-D95-LMP)
Note: The lamp unit is designed so broken lamp glass remains se-
curely inside the lamp unit.
Note: Be sure wear the gloves before replacing the lamp unit.
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