Toshiba 46hm94svm, 52hm94svm, 62hm94svm schematic

FILE NO. 020-200420

REVISION 1

SERVICE MANUAL

Projection Television

46HM94 52HM94 62HM94

DOCUMENT CREATED IN JAPAN, Oct., 2004

TABLE OF CONTENTS

CHAPTER 1 GENERAL ADJUSTMENTS

SAFETY INSTRUCTIONS .............................................................................................................................................. 3

SERVICE MODE ............................................................................................................................................................ 4

CHAPTER 2

SPECIFIC INFORMATIONS

SETTING & ADJUSTING DATA ...................................................................................................................................... 7

LAMP UNIT REPLACEMENT ......................................................................................................................................... 8

LIGHT ENGINE REPLACEMANT.................................................................................................................................

PARTS REPLACEMENT IN LIGHT ENGINE...............................................................................................................

EXPLODED VIEW ........................................................................................................................................ ................ 15

MECHANICAL DISASSEMBLY .................................................................................................................................... 16

CHASSIS REPLACEMENT PARTS LIST ..................................................................................................................... 17

PC BOARDS TOP AND BOTTOM VIEW ..................................................................................................................... 26

TERMINAL VIEW OF TRANSISTORS ......................................................................................................................... 44

CIRCUIT BLOCK DIAGRAM ........................................................................................................................................ 48

SPECIFICATIONS .................................................................................................................................................... END

APPENDIX:

CIRCUIT DIAGRAM

CHAPTER 1 GENERAL ADJUSTMENTS

SAFETY INSTRUCTIONS

SAFETY PRECAUTION

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 the 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.

PRODUCT SAFETY NOTICE

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 characteristics 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.

SERVICE MODE

1. ENTERING TO SERVICE MODE

1) Press MUTE button twice on Remote Control.

MUTE

2) Press MUTE button again to keep pressing.

2. DISPLAYING THE ADJUSTMENT MENU

1) Press MENU button on TV.

Service mode

Press

Adjustment mode

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 7)

3) While pressing the MUTE button, press MENU button on TV set.

(Service mode display)

Item

Data

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.

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 are executed properly.

2) During diagnosis, the following displays are shown.

SELF CHECK NO. 23 * * * * * * POWER : 000 BUS LINE : OK BUS CONT : OK BLOCK : MAIN SUB SET ID : 80 E2P VER : 08 OPT1 : 00 OPT2 : A0 SW VER : DLE May 13 2004 17:**:**

HDMI NO ******** ERR CDDE : 00

BEP SW VER : 42 E2R VER : 02

Thermo1 : +51 Thermo2 : +50

TIME TV : ****** LAMP :

****

Part number of microprocessor (IC609)

Operation number of protection circuit (The number of times of the power supply OFF by fan stop) . . . . “000” is normal.

BUS line check “OK” ................... Normal

“SCL-GND” or “NG” ........... SCL-GND short circuit

“SDA-GND” or “NG” ........... SDA-GND short circuit

“SCL-SDA” or “NG” ............ SCL-SDA short circuit

BUS line ACK (acknowledge) check

“OK” ................... Normal

Sync. signal check Green display ..... Normal

Red display ........ NG

MAIN ........ Main sync

SUB .......... Sub sync (when turn on the PIP)

ID code for TV Set Version of "EEP" Data for "OPT"

Temperature of DMD Temperature of the color wheel neighborhood Software version history HDMI Software

NO ***** .....Serial No.

ERR CODE .....Error Code

BEP Software Version

SW VER : **..... Version

E2P VER : ** EEP ROM Version

Use time

TV .....TV set on time (hour)

LAMP.....LAMP set on time (hour)

(It may shift from TV set on time.)

7. LED indicationsn

The green and red LED lights on the TV control touchpad (on the lower right corner of the TV screen) indicate the TV's current status, as follows:

Green ON = Control touchpad being pressed.

Red ON = Power ON.

Green and/or Red blinking

(see table below for condition and solution).

Control touchpad on TV front

MENUVOLUMECHANNELEXITTV/VIDEO POWER

Red indicator

Green indicator

LED Indication

Red LED Green LED

OFF OFF

ON (Solid) OFF

ON (Solid) ON (Solid)

OFF Blinks

(1sec. intervals)

ON Blinks

(Solid) (0.3sec. intervals)

Blinks ON

(0.5sec. intervals) (Solid)

Blinks Blinks

(1sec. intervals) (1sec. intervals)

Blinks OFF

(0.5sec. intervals)

Blinks OFF

(1sec. intervals)

Blinks OFF

(3times)

Blinks Blinks

(3times) (3times)

Condition

Power supply OFF. (AC)

Power supply OFF. (Standby)

(North America)

Power supply ON.

Touched the touchpad

Lamp LPS mode

The lamp is not working properly.

The lamp unit door is not seated

properly. (U)

The lamp is not working properly

after the third automatic reset (see

item #7). (U)

FAN (Light engine unit) has

stopped.

BUS line is damaged

The collar wheel has stopped.

Temperature rises abnormally.

(U) is restoration by the user.

Solution

The TV automatically will try to reset itself

three times.

Turn the POWER OFF and unplug the power

cord. Review “How to replace the lamp unit”

on pages 13-15 to ensure that the lamp unit

door is installed securely.

Turn the POWER OFF and then ON again. If

the problem persists, replace“the lamp unit

(see pages 13-15).

• Is the output voltage of the supply voltage

regulator for the FAN in the power circuit

normal?

• Has dust accumulated in the FAN?

If the output voltage is not abnormal,

replace the faulty FAN with a new one.

• Check the faulty device through the self

diagnostics function under SERVICE mode.

• Does BUS line (SOL, SDA) work normally?

If the BUS line is under abnormal

conditions, replace the faulty device with

a new one.

• Is the output voltage of the power supply

circuit normal?

If the output voltage is normal, replace the

engine with a new one.

• Is the ventilating hole in the set (exhaust

slot on the rear) blocked or covered?

• Is FAN rotating normally?

• Has dust accumulated in the ventilating

hole?

If no abnormally conditions are found,

replace the engine with a new one.

CHAPTER 2 SPECIFIC INFORMATIONS

SETTING & ADJUSTING DATA

SERVICE MODE

ADJUSTING ITEMS AND DATA IN THE SERVICE MODE:

Item Name of adjustment

RCUT R CUT OFF GCUT G CUTOFF BCUT B CUT OFF GDRV G DRIVE BDRV B DRIVE BRTC BRIGHT CENTER SCNT COLC COLOR CENTER UVTT BASE BAND TINT CNTX SUB CONTRAST MAX HPOS H-POSITION (PAL/DFS) VPOS CWDH CWDL DMDB DMD BIAS OPT1 TV SET OPTION OPT2 TV SET OPTION

Note:

The image system data of RCUT-CNTX is different by each image format. The NTSC value is indicated in the table.

SUB CONTRAST FOR TV

V-POSITION DC SHIFT (PAL/DFS) COLOR WHEEL DELAY (HIGH) COLOR WHEEL DELAY (LOW)

Preset Data

80H 80H 80H 40H 40H 80H 10H 4BH 43H 7FH 00H 00H 00H FAH 03H 04H A0H

Table-1

Item Name of adjustment

TVOP TV OPTION PLLW0 PLL WAIT TIME PLLW1 PLL WAIT TIME PLLW2 PLL WAIT TIME PLLW3 PLL WAIT TIME PLLW4 PLL WAIT TIME PLLW5 PLL WAIT TIME V01 VOLUME (DATA) V25 VOLUME (DATA) V50 VOLUME (DATA) V75 VOLUME (DATA) V100 VOLUME (DATA) MODH MODUS DATA HIGH MODL MODUS DATA LOW PRES FMAM PRESCALE SCTH SCTL

VOLUME SCART OPTION HIGH VOLUME SCART OPTION LOW

Preset Data

40H 14H 03H 0FH 05H 14H 04H 23H 4AH 63H 6FH 23H 20H 91H 24H 73H 01H

LAMP UNIT REPLACEMENT

Cautions when replacing LAMP UNIT

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 picture; 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 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 replacement by consumers; however, if the lamp unit is subjected to intentional 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 indicate a lamp rupture.

1. Turn off the TV and unplug the power cord.

2. STOP! Allow the lamp to cool for at least one (1) hour before replacing it.

3. On the back of the TV, loosen the thumb screw (by hand) on the lamp unit door, and then remove the lamp unit door.

5. Grasp the lamp unit handle and gently pull the lamp unit straight out of the TV. Set the old lamp unit aside.

6. Carefully insert the new lamp unit straight into the TV until it is fully seated.

Note :

Never subject the lamp unit to excessive shock. Never touch the lamp unit glass or otherwise get it dirty. Doing so may affect the image quality and reduce the service life of the lamp. See “Cleaning the lamp unit glass” below.

4. Using a manual screwdriver, loosen two screws on the lamp unit.

7. Using a manual screwdriver, tighten two lamp unit screws. Note:Hand-tighten only. Do not use an electric screwdriver.

8. Reattach the lamp unit door, making sure to insert the hook on the left side of the lamp unit door inside the opening in the TV cabinet.

9. Replace the thumb screw and hand-tighten.

10. Plug in the power cord and turn on the TV. After the initial warmup period (which may take up to 45 seconds for full picture brightness), the TV should operate normally. If any of the following conditions exist, turn off the TV, unplug the power cord, and repeat steps 1-9 to ensure that the lamp unit and lamp unit door are installed correctly:

No picture Dark picture TV will not turn on

LIGHT ENGINE REPLACEMENT

Cautions when replacing LIGHT ENGINE

LIGHT ENGINE is a heart of TV which emits high heat. Make sure to replace it after turning off the TV and wait for sufficient cool down. (More than one hour is recommended.) Do not add any impact during replacement; otherwise, some parts may be damaged. Do not touch any optical lens. Adhesion of dirt may deteriorate its performance. Do not loosen any screw other than those to be removed for adjustment or replacement. LIGHT ENGINE emits ultraviolet rays when the TV is ON. Make sure to be careful.

1. Replacement of Light Engine Unit

1-1. When Light Engine Unit is replaced with a new one, the

adjustment is required. Adjusted values are described in bar code, and the values of bar code must be converted to the adjusted values for the setup. There are 2 types of bar code.

1-2. Adjustment is made by service mode. The adjusting

items consist of CWDL, CWDH and DMDB.

CWDL CWDH

When CW delay number of the data bar code is 0450:

0450 indicates 450 45.0 Double 45.0 to form hexadecimal number (HEX).

45.0 x 2=90 5A (hexadecimal) The adjusted value becomes “5A” for CWDL and “00” for CWDH. If hexadecimal number forms 3 or 4 digits, the latter 2 digits indicate CWDL while the first 2 digits indicate CWDH. (For 3 digits, CWDH=0*)

Note:

For converting decimal number to hexadecimal number, see the conversion table on the next page.

Serial bar code

Data bar code

Serial bar code Ex. 52A000A111111

Inch size

Data bar code (CW: color wheel) Ex. A111111B1111

Serial numbers

CWdelay number: 4digits

DMD bias value

Substrate serial numbers

DMDB

Read DMD bias value described in alphabet from the data bar code. In service mode, DMDB value is converted and fixed by the following table.

DMD value in bar

code

B00

C01

D02

E03

F04

Refer to Service Mode for adjusting the service mode.

Adjusted value

(Hex)

Conversion Table for Decimal and Hexadecimal Numbers

CW delay number CWDH CWDL

0000 00 00 0005 00 01 0010 00 02 0015 00 03 0020 00 04 0025 00 05 0030 00 06 0035 00 07 0040 00 08 0045 00 09 0050 00 0A 0055 00 0B 0060 00 0C 0065 00 0D 0070 00 0E 0075 00 0F 0080 00 10 0085 00 11 0090 00 12 0095 00 13 0100 00 14 0105 00 15 0110 00 16 0115 00 17 0120 00 18 0125 00 19 0130 00 1A 0135 00 1B 0140 00 1C 0145 00 1D 0150 00 1E 0155 00 1F 0160 00 20 0165 00 21 0170 00 22 0175 00 23 0180 00 24 0185 00 25 0190 00 26 0195 00 27 0200 00 28 0205 00 29 0210 00 2A 0215 00 2B 0220 00 2C 0225 00 2D 0230 00 2E 0235 00 2F 0240 00 30 0245 00 31 0250 00 32 0255 00 33 0260 00 34 0265 00 35 0270 00 36 0275 00 37 0280 00 38 0285 00 39 0290 00 3A 0295 00 3B 0300 00 3C 0305 00 3D 0310 00 3E 0315 00 3F 0320 00 40 0325 00 41 0330 00 42 0335 00 43 0340 00 44 0345 00 45 0350 00 46 0355 00 47 0360 00 48 0365 00 49 0370 00 4A

CW delay number CWDH CWDL

0375 00 4B 0380 00 4C 0385 00 4D 0390 00 4E 0395 00 4F 0400 00 50 0405 00 51 0410 00 52 0415 00 53 0420 00 54 0425 00 55 0430 00 56 0435 00 57 0440 00 58 0445 00 59 0450 00 5A 0455 00 5B 0460 00 5C 0465 00 5D 0470 00 5E 0475 00 5F 0480 00 60 0485 00 61 0490 00 62 0495 00 63 0500 00 64 0505 00 65 0510 00 66 0515 00 67 0520 00 68 0525 00 69 0530 00 6A 0535 00 6B 0540 00 6C 0545 00 6D 0550 00 6E 0555 00 6F 0560 00 70 0565 00 71 0570 00 72 0575 00 73 0580 00 74 0585 00 75 0590 00 76 0595 00 77 0600 00 78 0605 00 79 0610 00 7A 0615 00 7B 0620 00 7C 0625 00 7D 0630 00 7E 0635 00 7F 0640 00 80 0645 00 81 0650 00 82 0655 00 83 0660 00 84 0665 00 85 0670 00 86 0675 00 87 0680 00 88 0685 00 89 0690 00 8A 0695 00 8B 0700 00 8C 0705 00 8D 0710 00 8E 0715 00 8F 0720 00 90 0725 00 91 0730 00 92 0735 00 93 0740 00 94 0745 00 95

CW delay number CWDH CWDL

0750 00 96 0755 00 97 0760 00 98 0765 00 99 0770 00 9A 0775 00 9B 0780 00 9C 0785 00 9D 0790 00 9E 0795 00 9F 0800 00 A0 0805 00 A1 0810 00 A2 0815 00 A3 0820 00 A4 0825 00 A5 0830 00 A6 0835 00 A7 0840 00 A8 0845 00 A9 0850 00 AA 0855 00 AB 0860 00 AC 0865 00 AD 0870 00 AE 0875 00 AF 0880 00 B0 0885 00 B1 0890 00 B2 0895 00 B3 0900 00 B4 0905 00 B5 0910 00 B6 0915 00 B7 0920 00 B8 0925 00 B9 0930 00 BA 0935 00 BB 0940 00 BC 0945 00 BD 0950 00 BE 0955 00 BF 0960 00 C0 0965 00 C1 0970 00 C2 0975 00 C3 0980 00 C4 0985 00 C5 0990 00 C6 0995 00 C7 1000 00 C8 1005 00 C9 1010 00 CA 1015 00 CB 1020 00 CC 1025 00 CD 1030 00 CE 1035 00 CF 1040 00 D0 1045 00 D1 1050 00 D2 1055 00 D3 1060 00 D4 1065 00 D5 1070 00 D6 1075 00 D7 1080 00 D8 1085 00 D9 1090 00 DA 1095 00 DB 1100 00 DC 1105 00 DD 1110 00 DE 1115 00 DF 1120 00 E0

CW delay number CWDH CWDL

1125 00 E1 1130 00 E2 1135 00 E3 1140 00 E4 1145 00 E5 1150 00 E6 1155 00 E7 1160 00 E8 1165 00 E9 1170 00 EA 1175 00 EB 1180 00 EC 1185 00 ED 1190 00 EE 1195 00 EF 1200 00 F0 1205 00 F1 1210 00 F2 1215 00 F3 1220 00 F4 1225 00 F5 1230 00 F6 1235 00 F7 1240 00 F8 1245 00 F9 1250 00 FA 1255 00 FB 1260 00 FC 1265 00 FD 1270 00 FE 1275 00 FF 1280 01 00 1285 01 01 1290 01 02 1295 01 03 1300 01 04 1305 01 05 1310 01 06 1315 01 07 1320 01 08 1325 01 09 1330 01 0A 1335 01 0B 1340 01 0C 1345 01 0D 1350 01 0E 1355 01 0F 1360 01 10 1365 01 11 1370 01 12 1375 01 13 1380 01 14 1385 01 15 1390 01 16 1395 01 17 1400 01 18 1405 01 19 1410 01 1A 1415 01 1B 1420 01 1C 1425 01 1D 1430 01 1E 1435 01 1F 1440 01 20 1445 01 21 1450 01 22 1455 01 23 1460 01 24 1465 01 25 1470 01 26 1475 01 27 1480 01 28 1485 01 29 1490 01 2A 1495 01 2B

CW delay number CWDH CWDL

1500 01 2C 1505 01 2D 1510 01 2E 1515 01 2F 1520 01 30 1525 01 31 1530 01 32 1535 01 33 1540 01 34 1545 01 35 1550 01 36 1555 01 37 1560 01 38 1565 01 39 1570 01 3A 1575 01 3B 1580 01 3C 1585 01 3D 1590 01 3E 1595 01 3F 1600 01 40 1605 01 41 1610 01 42 1615 01 43 1620 01 44 1625 01 45 1630 01 46 1635 01 47 1640 01 48 1645 01 49 1650 01 4A 1655 01 4B 1660 01 4C 1665 01 4D 1670 01 4E 1675 01 4F 1680 01 50 1685 01 51 1690 01 52 1695 01 53 1700 01 54 1705 01 55 1710 01 56 1715 01 57 1720 01 58 1725 01 59 1730 01 5A 1735 01 5B 1740 01 5C 1745 01 5D 1750 01 5E 1755 01 5F 1760 01 60 1765 01 61 1770 01 62 1775 01 63 1780 01 64 1785 01 65 1790 01 66 1795 01 67

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