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Part No. SKSM0281 E7LGV MAY 1997

Colour Television

Service Manual

Give complete "SERVICE REF. NO." for parts
order or servicing, it is shown on the rating sheet
on the cabinet back of the TV set.

Note
This TV receiver will not work properly in foreign
countries where the television transmission sys-
tem and power source differ from the design
specifications. Refer to the specifications for the
design specifications

Model: C25EG27

(W.EUROPE)

Ser Ref No. C25EG27-01

Product Code: 111320506
Chassis: EC5-A

Original Manual

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25DT1

Power Source

AC220~240V 50Hz

Television System

System BG

Colour System

PAL

Receiving Channels

VHF : E2~E12
CATV : X,Y,Z,S1~S41
UHF : 21~69

Aerial input impedance

75ohm

AV Terminal

21 pin SCART (AV1)

Speakers (two)

8ohm, 5 x 9 cm

Sound output

3W (cont.)

Picture tube

63 cm diagonal, 90˙

Visible picture

59 cm (diagonal)

Dimensions (W x H xD)

680 x 536 x 450 mm

Weight

25.5 kg

Page

Safety precautions ..............................2
Block diagram

Main signal routing ..........................3
Power signal routing ........................4

Circuit description .............................5~6
Service control adjustments..............7~8
Circuit alignment .................................9
Memory IC replacement ....................10
Special functions................................11
Cabinet parts list ................................12
Chassis electricl parts list ...............13~20
Schematic Diagram .........................loose

SPECIFICATIONS

CONTENTS

Содержание 111320506

Страница 1: ... A Original Manual 25DT1 Power Source AC220 240V 50Hz Television System System BG Colour System PAL Receiving Channels VHF E2 E12 CATV X Y Z S1 S41 UHF 21 69 Aerial input impedance 75ohm AV Terminal 21 pin SCART AV1 Speakers two 8ohm 5 x 9 cm Sound output 3W cont Picture tube 63 cm diagonal 90 Visible picture 59 cm diagonal Dimensions W x H xD 680 x 536 x 450 mm Weight 25 5 kg Page Safety precauti...

Страница 2: ...ny area of a receiver Components indicated by mark in the parts list and the schematic diagram designate components in which safe ty can be of special significance It is particularly recommended that only parts designated on the parts list in this manual be used for component replacement designated by mark No deviations from resistance wattage or voltage ratings may be made for replacement items d...

Страница 3: ...lour Volume 7 13 TV AV 30 R Y 31 B Y 29 R Y 28 B Y 30 R Y 31 B Y 29 R Y 28 B Y 50 Sound R out 18 G out 19 B out 20 CVBS out 7 SIF in 5 Int video 13 Ext video 15 Ext audio 6 Audio out 1 H out 37 41 43 V F B V out 4 2 4 2 8 R out Q711 G out Q721 B out Q701 IC501 V out H out circuit Q431 Q432 V control circuit Deflection Yoke T471 Flyback Trans High Voltage Q151 X151 X161 Q161 Q154 Q241 SCART 19 20 2...

Страница 4: ...3 C607 D601 D604 T611 converter trans AC in IC801 CPU IC802 Memory A1901 RC Pre amp A101 Tuner IC271 1H delay IC001 Audio out Speaker CRT Unit T471 FBT Horizontal Drive circuit IC501 V out IC201 IF video chroma def 44 8 3 MB 10 36 9 1 9 8 6 2 2 V deflection 5V 9V 5V 8V 8V 18V 9V 180V 150V 24V 24V Power supply circuit Standby signal from CPU pin 8 150V ...

Страница 5: ... Y signal and chroma signal in IC201 These pins are used in common with H V sync separation input The peaking of Y signal is adjusted by DC voltage of pin14 SHARPNESS control The chroma signal is divided into R Y and B Y chroma signals demodulated in IC201 and output from pin30 R Y and pin31 B Y These chroma signals pass through the 1H delay line cir cuit IC271 and they are input to pin29 R Y and ...

Страница 6: ... variations in the beam current 7 CPU System and Teletext Control Pin description Pin1 Tuning voltage output Pin2 Band switch output 3 UHF Pin3 Sharpness control output 6 bit DAC Pin4 Colour control output 6 bit DAC Pin5 Contrast control output 6 bit DAC Pin6 Brightness control output 6 bit DAC Pin7 Volume control output 6 bit DAC Pin8 Power ON OFF output Power On Lo Pin9 AFT signal input Pin10 Op...

Страница 7: ...Q432 H output IC501 V output VR462 PCC ADJ VR461 H Width VR501 V Size SW501 V center JS501 TP D IC271 1H delay TP A K1001 IC281 VR361 VR131 AGC A101 Tuner IC201 IF Video Chroma Def VC141 T141 T101 SIF decoder B1 POWER SUPPLY ADJ TU AGC ADJ AFT ADJ GREY SCALE ADJ FOCUS ADJ MAIN BOARD HIGH VOLTAGE H WIDTH ADJ V CENTRE ADJ H CENTRE ADJ V SIZE ADJ VR702 B Drive VR712 R Drive VR701 B Bias VR721 G Bias ...

Страница 8: ...counter clock wise 5 Connect a short lead between pin30 of IC801 and GND to enter the service mode 6 Set screen VR for one colour to be just visible BIAS VR ADJUSTMENT 7 By using VR701 VR711 or VR721 adjust line to be white 8 Disconnect a short lead DRIVE VR ADJUSTMENT 9 By using VR701 and VR711 adjust white balance HIGH VOLTAGE WIDTH ADJUSTMENT HIGH VOLTAGE ADJUSTMENT 1 Tune the receiver to circu...

Страница 9: ... Input probe Marker frequency Sweep ATT 0dB 176mVrms 75 SETTING C644 IC201 pin48 IC201 pin45 Side b IC201 pin7 38 9MHz 20dB Adjustment By using T141 adjust P to be maximum amplitude Waveform CIRCUIT ALIGNMENT VIF alignment 0 002µF 75Ω 1kΩ a b 10kΩ Input probe Output probe P ...

Страница 10: ...V set the following picture will appear on the screen 2 Confirm SET number of all items is 0 by pressing the Function button 3 If it is not 0 change to 0 by the Level button Changing the SET number automatically memo rised 4 Press the Recall button to return the normal TV mode For more information please refer to special functions on the instruction manual MEMORY IC REPLACEMENT Important Notice 1 ...

Страница 11: ...disconnected This TV set allows you to set up the following special functions Maximum volume setting and prohibition of presetting ITEM 1 Sets the current volume as the maximum volume level and prohibition of presetting SET 0 NO SET 1 YES Start up programme position ITEM 2 Presets the programme position when the set is switched on SET 0 Last programme position start SET 1 Programme position 1 star...

Страница 12: ...T BACK E7LC A 5 610 261 4404 DEC BOARD F2SGV 610 253 2449 HOLDER AC CORD GBR D4VA 6 610 261 3032 SPRING E7GC 7 610 266 1736 DEC SHEET E7PA ACCESSORIES 8 JXYC RC TRANSMITTER SKP10086 A INST MANUAL E7PG 1 SKP10087 A INST MANUAL E7PG 2 645 000 6708 BATTERY MANGAN COMPOSITE Ref No Part No Description Ref No Part No Description 7 4 1 5 3 6 2 1 2 3 4 5 6 7 8 9 0 i P P P P TV F X 8 CABINET PARTS LIST SER...

Страница 13: ... considered when a component replacement is made in any area of a receiver Components indicated by a mark in this parts list and the circuit diagram show components whose value have spe cial significance to product safety It is particularly recommended that only parts specified on the following parts list be used for components replacement pointed out by the mark Note Parts order must contain Serv...

Страница 14: ...5 018 9203 TR 2SC3895 T CTV YB Q631 406 007 2106 TR JC546A 406 007 2007 TR JC546B 405 019 1909 TR 2SC536 E NP 405 019 2708 TR 2SC536 F NP 405 019 3804 TR 2SC536 G NP Q651 405 089 0000 TR 2SA1707 S 405 089 0109 TR 2SA1707 T 405 009 6907 TR 2SB985 S 405 009 7003 TR 2SB985 T Q661 405 008 4805 TR 2SB764 E Q682 406 007 2106 TR JC546A 406 007 2007 TR JC546B 405 019 1909 TR 2SC536 E NP 405 019 2708 TR 2S...

Страница 15: ...1U K 63V 403 237 8007 MT COMPO 0 1U J 50V C203 403 073 9107 CERAMIC 4700P K 50V C204 403 068 0409 CERAMIC 0 1U Z 25V 403 070 2606 CERAMIC 0 1U Z 50V C205 403 068 0409 CERAMIC 0 1U Z 25V 403 070 2606 CERAMIC 0 1U Z 50V C206 403 068 0409 CERAMIC 0 1U Z 25V 403 070 2606 CERAMIC 0 1U Z 50V C207 403 068 0409 CERAMIC 0 1U Z 25V 403 070 2606 CERAMIC 0 1U Z 50V C208 403 068 0409 CERAMIC 0 1U Z 25V 403 070...

Страница 16: ...1 6W R1009 401 038 2200 MT GLAZE 27K JA 1 10W R101 401 038 6505 MT GLAZE 47K JA 1 10W R1011 401 027 6608 CARBON 75 JA 1 6W R1015 401 027 6608 CARBON 75 JA 1 6W R1016 401 027 6608 CARBON 75 JA 1 6W R1019 401 027 6608 CARBON 75 JA 1 6W R102 401 037 6803 MT GLAZE 12K JA 1 10W R1020 401 027 6608 CARBON 75 JA 1 6W R1021 401 038 6307 MT GLAZE 470 JA 1 10W R1022 401 024 7400 CARBON 10K JA 1 6W R1023 401 ...

Страница 17: ...OLID 5 6M KA 1 2W R629 402 000 8305 SOLID 5 6M KA 1 2W R635 401 012 8105 CARBON 100K JA 1 4W R636 401 020 2003 CARBON 4 7K JA 1 4W R637 401 015 4708 CARBON 180K JA 1 4W R638 401 061 4400 OXIDE MT 33K JA 1W R639 401 024 9701 CARBON 12K JA 1 6W R642 401 059 3903 OXIDE MT 1 5K JA 1W R645 402 052 2405 WIRE WOUND 18 KA FH 3W R646 401 025 7805 CARBON 2 2K JA 1 6W R651 401 012 7009 CARBON 10K JA 1 4W R65...

Страница 18: ...0 237 1000 PIPE CORE L615 645 002 1787 CORE PIPE L801 645 008 2894 INDUCTOR 5 6U K L841 645 008 0203 INDUCTOR 5 6U K L871 645 008 0203 INDUCTOR 5 6U K L881 645 011 0221 INDUCTOR 1 5U K DIODE D001 408 007 8607 DIODE 1N4148 407 013 1206 DIODE 1S1555 D002 408 007 8607 DIODE 1N4148 407 013 1206 DIODE 1S1555 D1007 407 063 8309 ZENER DIODE MTZJ11C 407 158 3400 ZENER DIODE UZ 11BSC D1011 407 063 8309 ZEN...

Страница 19: ...1 1041 UNIT REMOCON RECEIVER TP A 645 008 4058 TERMINAL PLUG TP D 645 008 4058 TERMINAL PLUG TP E 645 008 4058 TERMINAL PLUG K1001 645 005 5867 SOCKET RGB 21P 610 234 3779 SOCKET 21P K1001Z 610 261 2813 MOUNTING BRKT F2WV KR 1 645 008 4058 TERMINAL PLUG KR 2 645 008 4058 TERMINAL PLUG KR 3 645 008 4058 TERMINAL PLUG KSC 645 008 4058 TERMINAL PLUG PS601 408 013 3801 TH PTH451C262BF140M270 SW1901 61...

Страница 20: ...01 009 6602 CARBON 3 3K JA 1 2W R727 401 020 0801 CARBON 470 JA 1 4W R741 401 020 2003 CARBON 4 7K JA 1 4W R742 401 018 3807 CARBON 3 3K JA 1 4W R744 401 018 2800 CARBON 330 JA 1 4W VARIABLE RESISTOR VR701 645 003 5722 VR SEMI 4 7K N VR702 645 003 5647 VR SEMI 1K N VR711 645 003 5722 VR SEMI 4 7K N VR712 645 003 5647 VR SEMI 1K N VR721 645 003 5722 VR SEMI 4 7K N MISCELLANEOUS K701 610 233 7990 CR...

Страница 21: ...1 R637 R638 IC691 R635 R636 D641 D649 R639 R651 Q651 R652 Q686 R689 R688 Q685 D685 C685 R687 R686 Q682 C691 Q631 R681 VR631 R643 R642 D683 L631 L633 L635 L634 IC661P1 C663 L661 C662 R663 D669 R661 D661 D662 IC661 Q661 D644 D643 R662 R666 R626 T611 Q613 R623 C607 R624 PS601 L612 L611 JS612 R602 D615A R625 R628 R629 C621 C617 Q612 C615 R619 C614 R622 R621 R620 R615 D617 D616 R617 C603 C604 C605 C606...

Страница 22: ... Q431 E 0V C 10 8V B 0 3V Q154 E 3 1V C 0V B 2 4V Q153 E 9 3V C 2 3V B 8 7V Q152 E 3 2V C 8 7V B 0V Q151 E 3 8V C 0V B 3 2V Q501 E 0V C 4 7V B 0V Q203 E 0V C 6 0V B 0V Q202 E 0V C 0 4V B 0V Q201 E 0V C 0V B 0 8V Q1204 E 0V C 11 9V B 0V Q3483 E 1 9V C 8 4V B 2 5V Q1252 E 7 9V C 11 9V B 8 4V Q1251 E 7 7V C 11 9V B 8 4V Q3482 E 7 7V C 11 9V B 8 4V Q2621 E 1 9V C 143 8V B 2 2V Q3481 E 1 9V C 8 4V B 2 ...

Страница 23: ...Main CRT Board Pannello Principal Cinescopio Circuit side Lato del Circuito ...

Страница 24: ...anico 4 Ruotare fino in fondo in senso antiorario 5 Collegare un cortofilo mezzo spillo 30 di IC801 e GND terra a entrare in servizio modo VR701 VR711 o VR721 6 Regolare VR di schermo per un solo colore in modo che sia ben visibile REGOLAZIONE VR DEL BIAS POLARIZZAZIONE 7 Servendosi di VR701 VR711 o VR721 regolare la linea in modo che sia bianca 8 Staccare la cortofilo REGOLAZIONE VR DEL DRIVE ECC...

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