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Memorex MT2252, MT2252, Service Manual

The Memorex MT2252 is a high-performance product offering superior audio quality. For easy maintenance and troubleshooting, a comprehensive service manual and user manual are available for free download from manualshive.com. Delve into this manual to harness the full potential of your MT2252 and optimize your audio experience.

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A

B

C

D

E

F

G

H

A

B

C

D

E

F

G

H

2

1

3

4

5

6

7

8

2

1

3

4

5

6

7

8

S808Y

S805Y

R424

12K +-1%

R409

6.2K +-1%

R408

18K

+-1%

R401

100K+-1%

R405

22K

+-1%

R805

12K

2W

R807

12K

2W

R803

12K

2W

DY801

3321 203 00040

F

J801

CVT3275-5102

1

10

11

5

6

7

8

9

HS401

763WAA0104

Q403

DTA144ESTP

X-RAY TEST SW.

T401

5013001

1

2

345

CD805

SM1098-009-1A

CP805

TS-80P-02-V1

1

2

B
G
R

11

6
8

10

9

1

7

5

V801

A63AFW36X

CP401_1

TS-80P-04-V1

1

2

3

4

Q401

2SD2499(LBOEC1)

H.OUTPUT

CP806

005P-2100

1

R429

4.7 2W

IC401

LA78041

V-OUT IC

1

2

3

4

5

6

7

TP402

+B

TP023

TP024

TP022

R440

3.3K 5W

K003

8115529

K002

8115529

K001

8115529

MG801

29MMSTAR

VIDEO

8

E8

E25

E12

GND

TER

HEA

AFC

B+

GND

ABL

GND

COL

HV

F

S

FB401

3225010F

1

10

11

2

3

4

5

6

7

8

9

CP802B
51048-1010

1

10

2

3

4

5

6

7

8

9

CP802A

51048-1010

1

10

2

3

4

5

6

7

8

9

D407

AU02A-EIC

D413

11E1-EIC

D403

11E1-EIC

D411

AU02A-EIC

D408

AU02A-EIC

D404

AU02A-EIC

D410

AU02A-EIC

Q402

2SC2621

H.DRIVE

Q802

2SC4217

BLUE OUT

Q803

2SC4217

GREEN OUT

Q801

2SC4217

RED OUT

CAUTION: DIGITAL TRANSISTOR

DEFLECTION SIGNAL

B.SIGNAL

G.SIGNAL

R.SIGNAL

THE DC VOLTAGE AT EACH PART WAS MEASURED

 WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST

WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.

NOTE:

C434

22

100V

YK

C801_1

330P

B

C809_1

820P

W

C811_1

680P

W

C431

0.0022

B

C408_1

150P

SL

C430_1

0.022

100V

MKT

C810_1

560P

W

C437

0.56

200V

FHS

C439

22P

500V

SL

C440

0.0022

500V

B

C443_2

0.01

1.25KV

MPP

C802

0.001

2KV

B

C416

0.027

200V

PP

C448_1

10

250V

YK

C404

470

16V

YK

C446

1

160V

YK

C414

100

35V

YK

C433

470

35V

YK

C405

470

16V

YK

C418

1000

25V

YK

C435_2

0.1

100V

MHE

C417

4.7

50V

KA

R431

3.9K
1/4W

R816

390

R813

390

R811

4.7K

R814

4.7K

R809

4.7K

R420

10K1/4W

R428

8.2 1/2W

R422

6.8K

1/2W

R446

4.7K

1/2W

R427

100

1/4W

R406

4.7K

R411

680

1/2W

R806

2.7K

1/4W

R815

390

R802

2.7K

1/4W

R417

12K

1/4W

R404

2.7K

R418

27K 1/4W

R419

1.8K

1/4W

R413

1.8K

1/2W

R416

1.5K

1/2W

R804

2.7K

1/4W

R445

100K 1/2W

R421

220K 1/4W

R410

1.5K

1/2W

R436

2.2

1/2W

R407

2.2

1/2W

R432_1

1.5K

1/2W

OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE

NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME

DANS LA NOMENCLATURE DES PIECES

N’UTILISER QUE CELLS DECRITES

DANGEREUSES AN POINT DE VUE SECURITE

ETANT

LES PIECES REPAREES PAR UN

ATTENTION:

DESCRIBED IN PARTS LIST ONLY

CRITICAL FOR SAFETY,USE ONES

ARE

SINCE THESE PARTS MARKED BY

CAUTION:

D402

HZ11B1L

D405

MTZJ6.2B

D401

HZ27-1L

W857

W840

W843

L406

18uH

GND

CLAMP

CLAMP

G.OUT

G.OUT

B.OUT

B.OUT

R.OUT

R.OUT

V_FEEDBACK

HEATER

V_OUT

GND

ABCL

H_SYNC

180V

FBT+8V

GND

X-RAY

X-RAY_TEST

+12V

FBT+8V

+B

GND

G-6

G-5

9.6

16.1

1

2

3

4

R.OUT

B.OUT

G.OUT

CLAMP

GND

B.OUT

GND

CLAMP

G.OUT

0

0

16.0

114.0

0

0.3

19

17

16

15

R.OUT

B.OUT

CLAMP

GND

G.OUT

R.OUT

HEATER

GND

NC

180V

NC

HEATER

GND

NC

180V

NC

14

0

3.9

26.1

2.2

13

26

AMP

+
-

UP

PUMP

PROTECTION

THERMAL

GND

VCC

18

NC

NC

G

B

96.4

2.7

95.4

3.2

98.4

3.2

100.6

3.2

GND

HEATER

NC

NC

180V

22

R

21

1

2

PCB110
TCA358

3.9

20

2.7

2.7

SCREEN

FOCUS

112.0

128.0

128.0

0

0

0

0

0.3

0

-27.0

FROM/TO MICON/TUNER

FROM/TO CHROMA

TO SOUND

DEFLECTION/CRT SCHEMATIC DIAGRAM

(MAIN PCB)

PCB010
TMA501

FROM POWER

27.0

6.4

0

99.6

0

101.6

Summary of Contents for MT2252, MT2252

Page 1: ...SERVICE MANUAL Design and specifications are subject to change without notice COLOR TELEVISION RECEIVER ORIGINAL MFR S VERSION E MT2252 ...

Page 2: ...hock while the electric current is flowing 3 USE THE DESIGNATED PARTS The parts in this equipment have the specific characters of incombustibility and withstand voltage for safety Therefore the part which is replaced should be used the part which has the same character Especially as to the important parts for safety which is indicated in the circuit diagram or the table of parts as a mark the desi...

Page 3: ...CAL ADJUSTMENTS MAJOR COMPONENTS LOCATION GUIDE BLOCK DIAGRAM PRINTED CIRCUIT BOARDS MAIN CRT SCHEMATIC DIAGRAMS MICON TUNER CHROMA DEFLECTION CRT POWER SOUND WAVEFORMS MECHANICAL EXPLODED VIEW MECHANICAL REPLACEMENT PARTS LIST ELECTRICAL REPLACEMENT PARTS LIST A2 1 A1 1 A1 1 A1 1 A2 1 A3 1 A3 4 B 1 B 2 C 1 C 1 C 1 D1 1 D2 1 D3 1 E 1 E 2 F 1 F 4 G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8 G 9 G 10 H 1 H 3 I 1...

Page 4: ...ce AC 120V AC 60Hz DC Power Consumption at AC 110 W at AC 120 V 60 Hz Stand by at AC 4 W at AC 120 V 60 Hz Per Year kWh Year Protector Power Fuse Yes G 4 Regulation Safety UL Radiation FCC X Radiation DHHS G 5 Temperature Operation 5oC 40oC Storage 20oC 60oC G 6 Operating Humidity Less then 80 RH G 7 On Screen Menu Yes Display Menu Type Character Picture Yes Contrast Yes Brightness Yes Color Yes T...

Page 5: ...Yes 1 Yes 2 Yes 3 Yes 4 Yes 5 Yes 6 Yes 7 Yes 8 Yes 9 Yes 0 Yes 100 No CH Up Yes CH Down Yes Volume Up Yes Volume Down Yes TV Caption Text Yes CH1 CH2 Yes TV Video TV AV No Quick View Yes Sleep Yes RE Call Call Yes Reset Yes Menu Yes Enter Yes Mute Yes Exit No MTS Audio Select Yes Set Yes Set Yes Multi Brand Keys CH Up VCR No CH Down VCR No Pause Still No TV VCR VCR No Code No FF No Rew No Rec No ...

Page 6: ...ration Card Yes PTB Sheet No 300 ohm to 75 ohm Antenna Adapter No G 13 Interface Switch Front Power Yes System Select No Main Power SW No Sub Power No Channel Up Reset Yes Channel Down Enter Yes Volume Up Set Up Yes Volume Down Set Down Yes Menu Vol Up Vol Down Yes Rear AC DC No TV CATV Selector No Degauss No Main Power SW No Indicator Power No Stand by No On Timer No Terminals Front Video Input N...

Page 7: ...Double Brown Dimensions W x D x H mm 689 x 577 x 620 Design As per Buyer s Description of Origin Yes Drop Test Natural Dropping At 1 Corner 3 Edges 6 Surfaces Height cm 31 Container Stuffing 204 Sets 40 container G 17 Cabinet Material Cabinet Front PS 94V0 DECABROM Cabinet Rear PS 94V0 DECABROM A3 4 ...

Page 8: ...of the Anode with the tip of the Screwdriver A cracking noise will be heard as the voltage is discharged Flip up the sides of the Rubber Cap in the direction of the arrow and remove one side of the support Refer to Fig 1 2 2 DISASSEMBLY INSTRUCTIONS GND on the CRT Screwdriver Alligator Clip Support CRT GND on the CRT Rubber Cap CRT Support Fig 1 1 Fig 1 2 3 After one side is removed pull in the op...

Page 9: ... DEFLECTION YOKE Refer to Fig 2 1 1 2 3 4 5 Loosen the screw 1 Remove the Convergence Purity Magnet in the direction of arrow A Loosen the screw 2 Remove the 3 Wedges Remove the Deflection Yoke in the direction of arrow B Wedge Wedge Deflection Yoke Convergence Purity Magnet 2 1 A B Fig 2 1 INSTALLATION Install new Deflection Yoke in reverse steps of REMOVAL NOTE After adjusting the purity and the...

Page 10: ...G 1 Initial setting content of MEMORY IC POWER ON total hours 16 x 16 x 16 x thousands digit value 16 x 16 x hundreds digit value 16 x tens digit value ones digit value NOTE FOR THE REPLACING OF MEMORY IC If a service repair is undertaken where it has been required to change the MEMORY IC the following steps should be taken to ensure correct data settings while making reference to TABLE 1 Table 1 ...

Page 11: ...ST MONO TEST STEREO X RAY TEST NO 13 14 15 16 17 18 19 20 21 22 23 24 TV 00 OSD 15 Adjust the unit to the following settings R DRIVE 10 B DRIVE 10 R BIAS 64 G BIAS 64 B BIAS 64 BRIGHTNESS 135 CONTRAST 100 Place the set with Aging Test for more than 15 minutes Activate the adjustment mode display of Fig 1 1 and press the channel button 01 on the remote control to select CUT OFF Adjust the Screen Vo...

Page 12: ...07 on the remote control to select V SHIFT Press the VOL UP DOWN button on the remote control until the horizontal line becomes fit to the notch of the shabow mask 2 9 OSD HORIZONTAL 1 2 Activate the adjustment mode display of Fig 1 1 Press the VOL UP DOWN button on the remote control until the difference of A and B becomes minimum Refer to Fig 2 3 2 10 VERTICAL VCO 1 2 3 4 5 Place the set with Ag...

Page 13: ...h the color bar generator from the green raster pattern to the crosshatch pattern Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets Combine red blue magenta and green by adjusting the pair of 6 pole magnets Adjust the crosshatch pattern to change to white by repeating steps 6 and 7 Turn the unit on and let it warm up for at l...

Page 14: ...MAJOR COMPONENTS LOCATION GUIDE FOCUS VOLUME SCREEN VOLUME FB401 D3 1 CRT PCB J801 MAIN PCB TP024 TU001 TP001 TP402 CP601 VR502 TP022 CP351 ...

Page 15: ...WITCH 20 3 1 9V REG IC IC853 KIA78L09BP AT 12V 50 AUDIO OUT VIF IN G IN B IN R IN RF AGC OUT POWER ON CONT H OUT VIF Vcc MUTE SW Q352 VIF IN 29 SCL 10 SDA 5 INV FBP OUT 6 V PULSE OUT 17 V OUT 13 FPB IN 12 14 AT 10V 2 TUNER 5V STEREO 5V 5V REG Q605 5V REG Q601 5V REG Q604 12V 4 32 X602 3 579545MHz 40 7 39 36 TV Y IN 8 7V REG OUT X TAL 5V REG 5 7V REG OUT FOR CPU Y SW OUT B OUT R OUT G OUT Q606 REG ...

Page 16: ...2 W053 R420_1 W054 W055 W056 W059 W060 W064 W065 C506 W802 W809 C530 W070 L501 FH502 F501 FH501 CP501 C505 R500 RY501 CP502 D503 R505 C502 D504 D501 W071 C503 D502 C532 C507 R501 R542 B505 W072 B502 D515 R503 IC501 W073 R506 HS501 D518 IC506 W074 W076 W077 C870 D602 D601 C401_1 C427 W829 C872 R854 R855 C355 C356 C501 J801 R428 W081 C448 W814 W082 W083 W805 W085 W086 W088 C352 D514 W089 W091 W092 W...

Page 17: ...624 R630 R627 R644 IC852 C607 C637 C639 C634 R618 R860 C874 C879 C883 C881 R864 R866 C886 C888 C884 R863 C882 C880 R859 C636 R853 C863 C866 C868 C867 C864 C862 C119 R858 R857 C512_1 C515_1 Q101 Q352 R636 C004 R861 C858 R862 R865 R867 C807 C801 C806 C805 C804 R816 R814 R811 R815 R809 R813 R532 R533 Q403 C408_1 C661 C101 R553 R640 R353 C103 C621 C626_1 R103 R625 R629 C125 C623 R111 R114 Q602 Q607 Q6...

Page 18: ...S MARKED BY CAUTION D199 MTZJ6 2B D001 HZ30 3L W827 TM101 R25 1088 C124_1 0 1 50V KANP L101 2 7uH R001 68K 1W TP001 JWF 50K 1 AGC Q101 DTC114TKA X RAY TEST SW IC199 S 24C02BDP 1A MEMORY IC 1 2 3 4 5 6 7 8 SW104 SKHVBED010 VOL DOWN SW105 SKHVBED010 POWER SW103 SKHVBED010 VOL UP SW101 SKHVBED010 CH UP SW102 SKHVBED010 CH DOWN IC101 OEC7044C MICON IC 1 10 11 12 13 14 15 16 17 18 19 2 20 21 22 23 24 2...

Page 19: ...R644 100 R629 100 R628 100 R639 100 R632 100 1 2W R614 2 2K R619 2 2K R625 2 2K R642 33K R634 10K R621 2 2K R603 1 5K R626 10K R640 1K R647 220 R636 10K R652 1 8K OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME D602 MTZJ8 2B D610 MTZJ6 8B D609 MTZJ6 8B D606 MTZJ6 8B D608 MTZJ6 8B W818 W810 W830 W817 W826 W833 C638 4 7 50V KANP L606 2 2uH L607 ...

Page 20: ...C406 0 0022 500V B C416 0 027 200V PP C437_1 0 56 250V PMS C807 0 1 F C440 470P 500V B C401_1 220P B C408_1 150P SL C446 1 160V MHE C414 100 35V YK C405 470 16V YK C404 470 16V MHE C418 2200 25V YK C448 10 250V YK C433 470 35V YK R428 8 2 1 2W R421 100K 1 4W R806 2 7K 1 4W R804 2 7K 1 4W R802 2 7K 1 4W R811 4 7K R809 4 7K R813 330 R814 4 7K R816 330 R815 330 R434 2 2 1 2W R406 2 7K R422 6 8K 1 2W ...

Page 21: ...STER WHEN THE COLOR BROADCAST WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL NOTE C531 1000 16V MHE C507 330 200V USR C521_2 100 160V YXF C518 470P 500V B C516 470P 500V B C514_1 0 0012 2KV YR C505 0 1 250V ECQUL C530 0 001 250V KH C532 0 0022 250V KH C503 0 001 2KV B C502 0 001 2KV B C517_1 0 0015 2KV YR C554_1 0 0022 Y C506 0 1 250V ECQUL C512_1 470P B C515_1 470P B C510 100 35V MHE C501 1...

Page 22: ...R870 2 2M R363 1K 1 4W R857 18K OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME DANS LA NOMENCLATURE DES PIECES N UTILISER QUE CELLS DECRITES DANGEREUSES AN POINT DE VUE SECURITE ETANT LES PIECES REPAREES PAR UN ATTENTION DESCRIBED IN PARTS LIST ONLY CRITICAL FOR SAFETY USE ONES ARE SINCE THESE PARTS MARKED BY CAUTION W805 W829 W828 W839 W841 ...

Page 23: ... 200mV 20µs div 7 9 200mV 20µs div 0 5V 5ms div 10 11 1V 20µs div 12 1V 20µs div 1V 20µs div 13 8 20V 20µs div 3 200mV 20µs div DEFLECTION CRT 14 0 5V 5ms div 15 20V 20µs div H 1 NOTE The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram CHROMA ...

Page 24: ...10V 5ms div 18 50V 20µs div 20 NOTE The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram H 2 1V 1ms div 24 10V 5ms div 19 SOUND 25 0 5V 1ms div 26 200mV 1ms div 200mV 1ms div 27 0 5V 5µs div 28 29 200mV 1ms div 30 200mV 1ms div POWER ...

Page 25: ...WAVEFORMS NOTE The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram H 3 0 5V 1ms div 33 0 5V 1ms div 32 31 5 0V 20ms div ...

Page 26: ...D VIEW I 1 109 201 201 201 110 201 201 201 201 J801 PCB110 CRT PCB 108 206 V801 206 206 206 L503 111 117 114 113 113 114 101 102 104 203 103 115 SP351 203 107 PCB010 MAIN PCB TU001 204 105 205 106 202 112 202 204 116 118 ...

Page 27: ...13 762WPA0009 HOLDER CRT WIRE 114 8994201000 HOLDER CRT WIRE 115 711WPCA021 BADGE BRAND 116 8995034000 CORD CLIP UL CO 117 COATING CLIP 118 METEAL SPACER 201 8117540B04 SCREW TAPPING B0 TRUSS 4x20 202 8109I30A04 SCREW TAP TITE B WH7 3x10 203 8110630A04 SCREW TAP TITE P BRAZIER 3x10 204 8109630802 SCREW TAP TITE B BRAZIER 3x8 205 810B130A04 SCREW WASHER B M3x10 206 8141J50C54 SCREW TAP TITE P GW22 ...

Page 28: ...ON 2SC2621 D E RAC C416 P3N1F2273J CPP 0 027 UF 200V Q403 TPYJD05001 COMPOUND TRANSISTOR DTA144EKAT146 C418 E02LF3222M CE 2200 UF 25V Q504 TC5T018154 TRANSISTOR SILICON 2SC1815Y TPE2 or C433 E02LT4471M CE 470 UF 35V TCATC31980 TRANSISTOR SILICON KTC3198 AT Y GR C434 E02LT8220M CE 22 UF 100V Q507 TC5T018154 TRANSISTOR SILICON 2SC1815Y TPE2 or C437 P4J7F3564J CMPP 0 56 UF 250V PMS TCATC31980 TRANSIS...

Page 29: ...DER 51048 0510 CP802B 067R005019 WIRE HOLDER 51048 0510 CP803A 067R104019 WIRE HOLDER 51052 0400 CP803B 067R104019 WIRE HOLDER 51052 0400 DY801 027Q062501 DY 3321 203 00040 F501 081PA6R302 FUSE 23706 3 FB401 043225010F TRANSFORMER FLYBACK 3225010F FH501 06710T0006 HOLDER FUSE EYF 52BC FH502 06710T0006 HOLDER FUSE EYF 52BC K001 129A000010 WEDGE 8115529 K002 129A000010 WEDGE 8115529 K003 129A000010 ...

Page 30: ...M3I0 B0E A113525 SPEC NO O R NO ...

Page 31: ...om your local retailer please contact the remote manufacturer for the required programming code Si usted a comprado un control de remoto universal por favor comunicace con el fabricante para el codico de programaccion requerido When shipped from the factory the TV CATV menu option is set to the CATV Cable Television mode If not using CATV set this menu option to TV mode Al salir la unidad de fábri...

Page 32: ...tilation to ensure reliable operation of the unit and to protect it from overheating These openings must not be blocked or covered The openings should never be blocked by placing the unit on a bed sofa rug or other similar surface This unit should never be placed near or over a radiator or heat source This unit should not be placed in a built in installation such as a bookcase or rack unless prope...

Page 33: ...e unit c If the unit has been exposed to rain or water d If the unit does not operate normally by following the operating instructions Adjust only those controls that are covered by the operating instructions as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the unit to its normal operation e If the unit has ...

Page 34: ...l adjustment of BRIGHTNESS COLOR CONTRAST SHARPNESS and TINT Closed Captioned Decoder Displays text captions or 1 2 of full screen text on the screen for hearing impaired viewers Stereo SAP Reception This TV is designed to receive stereo and separate audio program SAP broadcasts where available 4 Remote Sensor Signals from the Remote Control unit are received here 5 VHF UHF IN ANT Jack Connect a V...

Page 35: ...ss the SLEEP button once and the remaining time will be momentarily displayed To cancel sleep time press the SLEEP buttonrepeatedly until the display turns to 0 5 VOL VOLUME Buttons Press the button to increase or the button to decrease the volume level 6 MENU Button Press to display the On Screen menu function 7 SET Buttons Press to select the desired setting during On Screen operations 8 RESET B...

Page 36: ...Descrambler box to select channels For Subscribers to Unscrambled Basic Cable with Scrambled Premium Channels If you subscribe to a cable service in which basic cable channels are unscrambled and premium channels require the use of a Converter Descrambler box you may wish to use a two set signal splitter sometimes called a two set coupler and an A B Switch box from the cable installer or an electr...

Page 37: ... 120 press 120 1 2 3 4 CH CHANNEL Up and Down buttons Press and release the CH CHANNEL or button The channel automatically stops at the next channel set into memory Press and hold the button down to change channels more quickly For proper operation before selecting channels they should be set into the TV s memory See TO MEMORIZE CHANNELS SETTING LANGUAGE This TV can display the on screen language ...

Page 38: ...able system used in your area AUTOMATIC CHANNEL MEMORY Press the MENU button Press the SET or button until the indicator next to CH SET begins to flash then press the ENTER button Press the SET or button until the indicator next to AUTO CH MEMORY begins to flash then press the ENTER button The TV will begin memorizing all the channels available in your area Channel numbers will remain red until au...

Page 39: ...hedule or other information After selecting a Closed Caption Mode it will stay in effect until it is changed even if the channel is changed If the Captions signal is lost due to a commercial or a break in the signal the Captions will reappear when the signal is received again If the channels are changed the Captions will be delayed approximately 10 seconds The Captions will appear in places on the...

Page 40: ...until BASS appears on the screen then press the SET or button to adjust the bass sound TREBLE Press the ENTER button until TREBLE appears on the screen then press the SET or button to adjust the treble sound The TV is equipped with a feature known as Multi channel TV Sound or MTS MTS broadcasts greatly enhance TV viewing by bringing you programs with high fidelity stereo sound MTS also provides an...

Page 41: ...annel 13 No CATV reception Batteries are weak dead or inserted incorrectly Remote is out of range move closer to TV within 15 feet Make sure Remote is aimed at sensor Confirm there are no obstructions between the Remote and the TV Make sure the power cord is plugged in Make sure TV CATV menu option is in the appropriate mode If using antenna check UHF antenna connections No broadcast on station tu...

Page 42: ...12 MEMO 3K00701B E 18 08 2001 14 54 12 ...

Page 43: ...13 ENGLISH MEMO 3K00701B E 18 08 2001 14 54 13 ...

Page 44: ...SERVICE MANUAL COLOR TELEVISION RECEIVER ORIGINAL MFR S VERSION A MT2252 SERIES A Design and specifications are subject to change without notice ...

Page 45: ...hock while the electric current is flowing 3 USE THE DESIGNATED PARTS The parts in this equipment have the specific characters of incombustibility and withstand voltage for safety Therefore the part which is replaced should be used the part which has the same character Especially as to the important parts for safety which is indicated in the circuit diagram or the table of parts as a mark the desi...

Page 46: ...PORTANT CONTENTS GENERAL SPECIFICATIONS DISASSEMBLY INSTRUCTIONS SERVICE MODE LIST CONFIRMATION OF USING HOURS NOTE FOR THE REPLACING OF MEMORY IC ELECTRICAL ADJUSTMENTS MAJOR COMPONENTS LOCATION GUIDE BLOCK DIAGRAM PRINTED CIRCUIT BOARDS MAIN CRT SCHEMATIC DIAGRAMS MICON TUNER CHROMA DEFLECTION CRT POWER SOUND WAVEFORMS MECHANICAL EXPLODED VIEW MECHANICAL REPLACEMENT PARTS LIST ELECTRICAL REPLACE...

Page 47: ...nsumption at AC 110 W at AC 120 V 60 Hz Stand by at AC 8 W at AC 120 V 60 Hz Per Year kWh Year Protector Power Fuse Yes G 4 Regulation Safety UL Radiation FCC X Radiation DHHS G 5 Temperature Operation 5oC 40oC Storage 20oC 60oC G 6 Operating Humidity Less then 80 RH G 7 On Screen Menu Yes Display Menu Type Character Picture Yes Contrast Yes Brightness Yes Color Yes Tint Yes Sharpness Yes Audio Ye...

Page 48: ... h Power Source Voltage D C 3V UM size x pcs UM 4 x 2 pcs Total Keys 27 Keys Keys Power Yes 1 Yes 2 Yes 3 Yes 4 Yes 5 Yes 6 Yes 7 Yes 8 Yes 9 Yes 0 Yes 100 No CH Up Yes CH Down Yes Volume Up Yes Volume Down Yes TV Caption Text Yes CH1 CH2 Yes TV Video TV AV No CH RTN CH ENT Quick View Yes Sleep Yes RE Call Call Yes Reset Yes Menu Yes Enter Yes Mute Yes Exit No MTS Audio Select Yes Set Yes Set Yes ...

Page 49: ...otel Lock No Closed Caption Yes Stable Sound No Favorite CH No G 12 Accessories Owner s Manual Language English w Guarantee Card Yes Remote Control Unit Yes Rod Antenna No Poles Terminal Loop Antenna No Terminal U V Mixer No DC Car Cord Center No Guarantee Card No Warning Sheet No Circuit Diagram No Antenna Change Plug No Service Facility List No Important Safeguard No Dew AHC Caution Sheet No AC ...

Page 50: ...ideo Output No Audio Output No Euro Scart No Color Stream No Diversity No Ext Speaker No DC Jack 12V Center No VHF UHF Antenna Input F Type AC Outlet No G 14 Set Size Approx W x D x H mm 618 x 504 x 525 G 15 Weight Net Approx 27kg 59 9 lbs Gross Approx 29Kg 64 3 lbs G 16 Carton Master Carton No Content Sets Material Dimensions W x D x H mm x x Description of Origin No Gift Box Yes Material Double ...

Page 51: ...of the Anode with the tip of the Screwdriver A cracking noise will be heard as the voltage is discharged Flip up the sides of the Rubber Cap in the direction of the arrow and remove one side of the support Refer to Fig 1 2 2 DISASSEMBLY INSTRUCTIONS GND on the CRT Screwdriver Alligator Clip Support CRT GND on the CRT Rubber Cap CRT Support Fig 1 1 Fig 1 2 3 After one side is removed pull in the op...

Page 52: ... DEFLECTION YOKE Refer to Fig 2 1 1 2 3 4 5 Loosen the screw 1 Remove the Convergence Purity Magnet in the direction of arrow A Loosen the screw 2 Remove the 3 Wedges Remove the Deflection Yoke in the direction of arrow B Wedge Wedge Deflection Yoke Convergence Purity Magnet 2 1 A B Fig 2 1 INSTALLATION Install new Deflection Yoke in reverse steps of REMOVAL NOTE After adjusting the purity and the...

Page 53: ...0 83 0010 CRTON ADDRESS DATA FIG 1 Initial setting content of MEMORY IC POWER ON total hours 16 x 16 x 16 x thousands digit value 16 x 16 x hundreds digit value 16 x tens digit value ones digit value NOTE FOR THE REPLACING OF MEMORY IC If a service repair is undertaken where it has been required to change the MEMORY IC the following steps should be taken to ensure correct data settings while makin...

Page 54: ... X RAY TEST NO 13 14 15 16 17 18 19 20 21 22 23 24 TV 00 OSD 15 Adjust the unit to the following settings R DRIVE 81 B DRIVE 65 R BIAS 69 G BIAS 80 B BIAS 70 BRIGHTNESS 135 CONTRAST 100 Place the set with Aging Test for more than 15 minutes Activate the adjustment mode display of Fig 1 1 and press the channel button 01 on the remote control to select CUT OFF Adjust the Screen Volume until a dim ra...

Page 55: ...inimum 2 7 VERTICAL SIZE NOTE Adjust after performing adjustments in section 2 6 1 2 3 4 5 2 8 VERTICAL SHIFT Receive the center cross signal from the Pattern Generator Using the remote control set the brightness and contrast to normal position Activate the adjustment mode display of Fig 1 1 and press the channel button 06 on the remote control to select V SIZE Press the VOL UP DOWN button on the ...

Page 56: ...ch the color bar generator from the green raster pattern to the crosshatch pattern Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets Combine red blue magenta and green by adjusting the pair of 6 pole magnets Adjust the crosshatch pattern to change to white by repeating steps 6 and 7 Turn the unit on and let it warm up for at ...

Page 57: ...MAJOR COMPONENTS LOCATION GUIDE FOCUS VOLUME SCREEN VOLUME D3 1 CRT PCB J801 TP022 MAIN PCB VR502 FB401 CP601 R606 TP402 TP024 TU001 CP351 ...

Page 58: ...C IC853 KIA78L09BP AT 12V 50 AUDIO OUT VIF IN G IN B IN R IN RF AGC OUT POWER ON CONT H OUT VIF Vcc VIF IN 29 SCL 10 SDA 5 INV FBP OUT 6 V PULSE OUT 17 V OUT 13 FPB IN 12 14 AT 10V 2 TUNER 5V STEREO 5V 5V REG Q605 5V REG Q601 5V REG Q604 12V 4 32 X602 3 579545MHz 40 7 39 36 TV Y IN 8 7V REG OUT X TAL 5V REG 5 7V REG OUT FOR CPU Y SW OUT B OUT R OUT G OUT Q606 REG 5V REG Q603 33 AT 5V AT 10V REMOCO...

Page 59: ...W036 W128 W012 W119 D606 D609 D608 W011 R543 W105 CP601 C433 W120 W122 L608 W014 W109 R440 W066 FB401 TP402 D502 D503 D512 D501 S501B S501A W033 W035 W045 W046 C115 R625 W010 R648 R641 D604 D607 D611 W080 Q608 CP802A W114 W039 W041 W829 W129 W082 W085 C507_1 Q351 W064 Q403 W076 W075 R431 R001 W107 W131 W134 W069 R632 W096 W073 Q101 R420 D403 R002 W051 W078 W077 W074 W022 TP024 TP022 R802 R804 R803...

Page 60: ...605 R626 R624 R630 R627 IC852 C607 C639_1 C634 R618 R860 C879_1 R864 R866 C886_1 C880_1 R859 C636_1 R853 C863_1 R858 R857 C512_1 C515_1 R861 R862 C554_1 R532 R533 R645 R553 R640 R353 C621 C626_1 R103 C623_2 R111 R114 C129_1 C650_1 C651_1 R647 R134 R650 C656_1 R815 R816 R811 R814 C801_1 R813 R809 R133 R629 C658_1 C363_1 C119 C125 C127_1 C128_1 C134 C811_1 C810_1 C809_1 C511_1 C408_1 PRINTED CIRCUIT...

Page 61: ...RKED BY CAUTION D001 MTZJ30B W864 W863 W862 W804 W827 TM101 RC DW L101 2 7uH Q101 DTC114TSTP X RAY TEST SW IC199 S 24C02BDP 1A MEMORY IC 1 2 3 4 5 6 7 8 SW101 SKHVBED010 25 CH UP SW102 SKHVBED010 25 CH DOWN SW104 SKHVBED010 25 VOL DOWN SW105 SKHVBED010 25 POWER SW103 SKHVBED010 25 VOL UP IC101 OEC7044C MICON IC 1 10 11 12 13 14 15 16 17 18 19 2 20 21 22 23 24 25 26 27 28 29 3 30 31 32 33 34 35 36 ...

Page 62: ...27 R618 10M R605 5 6K R627 100 R630 100 R631 100 1 4W R623 120 1 4W R641 22K 1 4W R645 10 R632 100 1 2W R634 10K R647 220 R604 2 2K OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME D608 MTZJ9 1B D609 MTZJ9 1B D606 MTZJ9 1B D602 MTZJ8 2B D610 MTZJ6 8B W844 W810 W830 W817 W801 W802 W838 L601 1 2uH L606 2 2uH L607 15uH L608 6 8uH Q608 DTC114ES SWI...

Page 63: ..._1 10 250V YK C404 470 16V YK C446 1 160V YK C414 100 35V YK C433 470 35V YK C405 470 16V YK C418 1000 25V YK C435_2 0 1 100V MHE C417 4 7 50V KA R431 3 9K 1 4W R816 390 R813 390 R811 4 7K R814 4 7K R809 4 7K R420 10K1 4W R428 8 2 1 2W R422 6 8K 1 2W R446 4 7K 1 2W R427 100 1 4W R406 4 7K R411 680 1 2W R806 2 7K 1 4W R815 390 R802 2 7K 1 4W R417 12K 1 4W R404 2 7K R418 27K 1 4W R419 1 8K 1 4W R413...

Page 64: ...CHING THE DC VOLTAGE AT EACH PART WAS MEASURED WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL NOTE C521_1 100 160V YXF C507_1 330 200V UP C531_1 1000 16V YK C516 470P 500V B C511_1 470P B C502_1 0 001 500V B C503_1 0 001 500V B C517 0 0015 2KV YR C514 0 0012 2KV YR C530 0 001 250V KH C512_1 470P B C515_1 470P B C554_1 0 0022 Y C506_2 0 1 275V ...

Page 65: ... 15K R354 4 7K 1 4W R860 4 7K OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME DANS LA NOMENCLATURE DES PIECES N UTILISER QUE CELLS DECRITES DANGEREUSES AN POINT DE VUE SECURITE ETANT LES PIECES REPAREES PAR UN ATTENTION DESCRIBED IN PARTS LIST ONLY CRITICAL FOR SAFETY USE ONES ARE SINCE THESE PARTS MARKED BY CAUTION W828 W839 W841 W805 W842 W8...

Page 66: ...7 9 200mV 20µs div CHROMA 0 5V 5ms div 10 11 1V 20µs div 12 1V 20µs div 1V 20µs div 13 8 20V 20µs div 3 200mV 20µs div DEFLECTION CRT 14 0 5V 5ms div 15 20V 20µs div H 1 NOTE The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram 1 1V 0 1µs div ...

Page 67: ...10V 5ms div 18 50V 20µs div 20 NOTE The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram H 2 1V 1ms div 24 10V 5ms div 19 SOUND 25 0 5V 1ms div 26 200mV 1ms div 200mV 1ms div 27 0 5V 5µs div 28 29 200mV 1ms div 30 200mV 1ms div POWER ...

Page 68: ...WAVEFORMS NOTE The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram H 3 0 5V 1ms div 33 0 5V 1ms div 32 31 5 0V 20ms div ...

Page 69: ...CHANICAL EXPLODED VIEW I 1 PCB010 MAIN PCB TU001 205 202 112 202 204 105 J801 PCB110 CRT PCB 108 206 V801 206 206 206 L503 111 113 113 107 107 109 201 201 110 201 201 201 101 102 104 203 103 106 SP351 203 ...

Page 70: ...TING 111 723000B301 FILM DECORATION 112 899HV3T000 HOLDER ANODE WIRE 113 762WPA0009 HOLDER CRT WIRE 201 8117540B04 SCREW TAPPING B0 TRUSS 4x20 202 8109I30A04 SCREW TAP TITE B WH7 3x10 203 8110630A04 SCREW TAP TITE P BRAZIER 3x10 204 8109630802 SCREW TAP TITE B BRAZIER 3x8 205 810B130A04 SCREW WASHER B M3x10 206 8111J50D05 SCREW TAPPING A GW22 5x35 J3K00701 INSTRUCTION BOOK J3I0B017 REGISTRATION CA...

Page 71: ...LICON KTC3198 AT Y GR C444 E02LT2471M CE 470 UF 16V Q507 TCATC31980 TRANSISTOR SILICON KTC3198 AT Y GR C446 E02LTB010M CE 1 UF 160V Q601 TCAT032034 TRANSISTOR SILICON KTC3203_Y AT or C448 E0ELTD100M CE 10 UF 250V TC5T021204 TRANSISTOR SILICON 2SC2120Y TPE2 C501 E02LT3102M CE 1000 UF 25V Q603 TCAT032034 TRANSISTOR SILICON KTC3203_Y AT or C502 E0JTB0513K CE 0 001 UF 500V TC5T021204 TRANSISTOR SILICO...

Page 72: ...01 043225010F TRANSFORMER FLYBACK 3225010F FH501 06710T0006 HOLDER FUSE EYF 52BC FH502 06710T0006 HOLDER FUSE EYF 52BC K001 129A000010 WEDGE 8115529 K002 129A000010 WEDGE 8115529 K003 129A000010 WEDGE 8115529 MG801 026A062704 MAGNET CONVERGENCE 29MMSTAR OS101 077Q014003 REMOTE RECEIVER PIC 28143SY 2 PH003 069W01001A CONNECTOR PCB SIDE 003P 2100 PH004 069W01001A CONNECTOR PCB SIDE 003P 2100 RY501 0...

Page 73: ...M3K0 07E SPEC NO O R NO A143508 ...

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