akira CT-25TW9AN Service Manual Download Page 30

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Model No: CT-25TW9A

Version 1.0

MECHANICAL DISASSEMBLY

Cabinet back removal

1. Refer to figure 1, remove 10 screws.
2. Pull off cabinet back and remove.

Chassis removal

1. Remove cabinet back.
2. Discharge the picture tube anode (2

anode lead) to the dag coating (picture tube grounding

lead).

3. Disconnect Degaussing coil socket (KE), picture tube socket, Deflection yoke connector

(KDY), speaker connectors (KL and KR) and 2

anode lead.

4. Remove chassis completely by sliding it straight back.

DEGAUSSING

COIL

DEGAUSSING

COIL HOLDER

To CRT Unit

ground

PICTURE TUBE

GROUNDING LEAD

DEGAUSSING

COIL SOCKET

Summary of Contents for CT-25TW9AN

Page 1: ...C C Co o ol l lo o ou u ur r r T T TV V V S S Se e er r rv v vi i ic c ce e e M M Ma a an n nu u ua a al l l...

Page 2: ...2 Model No CT 25TW9AN Version 1 0 9 CHASSIS 5P60 MODEL CT 25TW9AN...

Page 3: ...CONTENT SAFETY NOTICE 4 TECHNICAL SPECIFICATION 5 GENERAL SPECIFICATION 6 CHASSIS BLOCK DIAGRAM 7 CHASSIS WIRING DIAGRAM 17 PBC BOARD 18 SERVICE ADJUSTMENT 21 MECHANICAL DISASSEMBLY 30 SCHEMATIC DIAG...

Page 4: ...of X RADIATION in television receiver is the picture tube The picture tube is specially constructed to limit X RADIATION emissions For continued X_RADIATION protection the replacement tube must be the...

Page 5: ...nnel Memories NTSC Playback Front or Side AV Input S Video Input On Screen Display Sleep Timer Auto Search Store Shut Off Full function Remote Control 8W X 2 Speakers 746 W x 483 D x 519 H mm Weight 3...

Page 6: ...CH 471 25 863 25 MHz TUNING SYSTEM VS TUNING 1 AV IN 1 AV OUT 1 FRONT AV INPUT 1 S VIDEO IN 1 YUV IN OPTION AV IN OUT 21 PIN SCART OPTION Y C IN y 1 0 0 2Vp p 75 ohm c 0 7Vp p 75 ohm VIDEO IN 1 0 0 2V...

Page 7: ...7 Model No CT 25TW9AN Version 1 0 CHASSIS BLOCK DIAGRAM...

Page 8: ...UNIVERSAL HI FI AUDIO PROCESSOR TDA9859H IC605 IC606 REGULATORS L7800 SERIES 1 INPUT 2 OUTPUT SERIES PASS ELEMENT SOA PROTECTION REFERENCE VOLTAGE ERROR AMPLIFIER THERRMAL PROTECTION STARTING CIRCUIT...

Page 9: ...9 Model No CT 25TW9AN Version 1 0 IC 402 SRS TRUBASS NJM2192 AM...

Page 10: ...10 Model No CT 25TW9AN Version 1 0 IC 401 AV SWITCH W IIC BUS CONTROL M52797SP...

Page 11: ...11 Model No CT 25TW9AN Version 1 0 IC 101 SYSTEM TV SIGNAL PROCESSOR TELETEXT TDA93XXPS N2 5I...

Page 12: ...12 Model No CT 25TW9AN Version 1 0 IC 103 DIGITAL TV SOUND DEMODULATOR DECODER TDA9874AH...

Page 13: ...13 Model No CT 25TW9AN Version 1 0 IC 302 VERTICAL DEFLECTION BOOSTER TDA4863AJ IC 404 BTL AUDIO AMPLIFIER TDA8944J...

Page 14: ...14 Model No CT 25TW9AN Version 1 0 IC 803 MULTISTANDARD COMB FILTE TDA9181T IC 802 HEF4052...

Page 15: ...15 Model No CT 25TW9AN Version 1 0 IC 601 PHOTO TRANSISTOR TLP621 IC 604 POWER SWITCH KA5Q12XXRF TLP621 1 2 3 4 1 ANODE 2 CATHODE 3 EMITTER 4 COLLECTOT...

Page 16: ...B E C18 15 C B E B42 0 C B E B42 1 C B E C B E A1015 PNP PNP NPN NPN PNP C21 20 C B E PNP C27 17 C B E NPN NPN L7805 INPUT GND OUTPUT L7812 INPUT GND OUTPUT L7809 INPUT GND OUTPUT Se140 Vout SENSE COL...

Page 17: ...CN 706 FROM Cn805 H403 CN 703 FROM CN801A FOCUS SCREEN CN401A H502 FROM CN 302 CN 601 CN 602 H501 FROM CN 203 CN 806 TO CN 705 CN 805 TO CN 706 CN 203 TO H501 CN 202 TO KEYBOARD CN 803 TO CN 704 CN 80...

Page 18: ...18 Model No CT 25TW9AN Version 1 0 PBC BOARD...

Page 19: ...19 Model No CT 25TW9AN Version 1 0 CAM350 PRO V 6 0 Wed Jan 15 10 17 54 2003 Untitled...

Page 20: ...20 Model No CT 25TW9AN Version 1 0 SIDE FRONT AV AV PCB TOP LAYER CONTROL PCB TOP LAYER 5800 D25TMY 01...

Page 21: ...ance c Pattern Generator d DC regulator power supply e Digital Voltmeter f Sweep signal generator g 20MHz 2 channel Oscilloscope h Signal condition ITEMS LOGO PICTURE CARRIER PATTERN SYSTEM SOUND MODE...

Page 22: ...nter at the center of CRT screen in factory mode ii Receive 50HZ monoscope pattern Set TV standard status Adjust 5VAM to obtain picture s vertical redisplay ratio more than 90 in factory mode Vertical...

Page 23: ...R Horizontal bow 60Hz 6BOW Horizontal shift 60Hz 6HSH EW width 60Hz 6EWW EW parabola width 60Hz 6EWP EW upper corner parabola 60Hz 6UCR EW lower corner parabola 60Hz 6LCR EW trapezium 60Hz 6EWT f OSD...

Page 24: ...o NOISE on screen iv Press key to exit factory mode i E2PROM initialization i When in repairing we can replace E2PROM by other empty or unempty E2PROM but you must initialize E2PROM to avoid unknown t...

Page 25: ...25 Model No CT 25TW9AN Version 1 0 Service items This appendix shows information about service items that are available The table list all possible available service items with its...

Page 26: ...26 Model No CT 25TW9AN Version 1 0...

Page 27: ...27 Model No CT 25TW9AN Version 1 0...

Page 28: ...28 Model No CT 25TW9AN Version 1 0...

Page 29: ...ake the green area at the center of CRT screen 6 Slowly push the deflection yoke toward the front of CRT and set it where a uniform green field is obtained Tighten the clamp screw of the deflection yo...

Page 30: ...scharge the picture tube anode 2nd anode lead to the dag coating picture tube grounding lead 3 Disconnect Degaussing coil socket KE picture tube socket Deflection yoke connector KDY speaker connectors...

Page 31: ...tube 1 Remove chassis referring to chassis removal instructions 2 Place cabinet front face down on the soft surface 3 Remove the screw on each corner of the picture tube and GENTLY lift the picture tu...

Page 32: ...270PF D505 1N4148 D506 BA157 2 R528 12K S Gnd R526 220 S Gnd R531 22 R532 2 2K R533 270 R534 22 Q531 C4544 Q532 BF420 Q533 BF421 R535 270 C502 270PF D502 1N4148 D503 BA157 2 R538 12K S Gnd R536 220 S...

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