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akira CT-14CQS5CPT, Service Manual

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Model no.:CT-21CQS5CPT.doc 
version 1.0 

3

 
 
CONTENTS 

 

SAFETY INSTRUCTIONS AND MAINTENANCE

..........................................................................

4 

 

SAFETY PRECAUTION .......................................................................................................................................... 5 
 
PRODUCT SAFETY NOTICE ................................................................................................................................. 6 
 
SAFETY SYMBOL DESCRIPTION ........................................................................................................................ 7 
 
MAINTENANCE  ..................................................................................................................................................... 8 
 

SPECIFICATION

....................................................................................................................................................

9

 

 
CONTROL & FUNCTION

...................................................................................................................................

10

 

 

MECHANICA DISASSEMBLING

....................................................................................................

12

 

 

ADJUSTMENTS

..................................................................................................................................

14 

 

SET-UP ADJUSTMENTS....................................................................................................................................... 14 
 
CIRCUIT ADJUSTMENTS .................................................................................................................................... 16 

 

STRUCTURE AND CHASSIS FUNCTION DESCRIPTION

.........................................................

23

 

 

STRUCTION BLOCK DIAGRAM......................................................................................................................... 23 
 
CHASSIS DESCRIPTION ...................................................................................................................................... 23 
 

SERVICE DATA

..................................................................................................................................

25

 

 

 
 
 

 

APPENDIX

..........................................................................................................................................

38

 

 

CIRCUIT DIAGRAM 

PARTS  LIST

 

 

 
 

 

 
 
 
 

 
 

 

 
 

Please read this manual carefully before service

.

                                    

 

 

Summary of Contents for CT-14CQS5CPT

Page 1: ...C C Co o ol l lo o or 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: ...Model no CT 21CQS5CPT doc version 1 0 2 Model C C CT T T 2 2 21 1 1C C CQ Q QS S S5 5 5C C CP P PT T T C C Ch h ha a as s ss s si i is s s E E ET T TE E E 2 2 2 ...

Page 3: ...SCRIPTION 7 MAINTENANCE 8 SPECIFICATION 9 CONTROL FUNCTION 10 MECHANICA DISASSEMBLING 12 ADJUSTMENTS 14 SET UP ADJUSTMENTS 14 CIRCUIT ADJUSTMENTS 16 STRUCTURE AND CHASSIS FUNCTION DESCRIPTION 23 STRUCTION BLOCK DIAGRAM 23 CHASSIS DESCRIPTION 23 SERVICE DATA 25 APPENDIX 38 CIRCUIT DIAGRAM PARTS LIST Please read this manual carefully before service ...

Page 4: ...l using an accurate EHT voltmeter 2 The only source of X RAY radiation in this TV is the CRT The TV minimizes X RAY radiation which ensures safety during normal operation To prevent X ray radiation the replacement CRT must be identical to the original fitted as specified in the parts list 3 Some components used in this TV have safety related characteristics preventing the CRT from emitting X ray r...

Page 5: ...ound when the TV is in operation Install a suitable isolating transformer of beyond rated overall power when servicing or connecting any test equipment for the sake of safety 4 When replacing ICs use specific tools or a static proof electric iron with small power below 35W 5 Do not use a magnetized screwdriver when tightening or loosing the deflection yoke assembly to avoid electronic gun magnetiz...

Page 6: ...read the parts list in this manual carefully Substitute replacement components which do not have the same safety characteristics as specified in the parts list may create X ray radiation 2 Do not slap or beat the cabinet or CRT since this may result in fire or explosion 3 Never allow the TV sharing a plug or socket with other large power equipment Doing so may result in too large load causing fire...

Page 7: ...Model no CT 21CQS5CPT doc version 1 0 7 SAFETY SYMBOL DESCRIPTION ...

Page 8: ... 3 Allow enough space at least 10cm between the TV and wall or enclosures for proper ventilation 4 Slots and openings in the cabinet should never be blocked by clothes or other objects 5 Please power off the TV set and disconnect it from the wall immediately if any abnormal condition are met such as bad smell belching smoke sparkling abnormal sound no picture sound raster Hold the plug firmly when...

Page 9: ... 1 0 9 SPECIFICATION RF System Colour Sound system PAL SECAM BG DK I NTSC M 4 43 3 58 Programs Preset 236 0 235 Antenna Input 75Ω unbalanced Power Source 110 240V 50 60Hz Designs and specifications are subject to change without notice ...

Page 10: ...Model no CT 21CQS5CPT doc version 1 0 10 CONTROL FUNCTION Front Panel Rear Panel The pictures showed are for function illustration Please refer to the TV as the standard ...

Page 11: ...Model no CT 21CQS5CPT doc version 1 0 11 Remote Control ...

Page 12: ...ack and remove CHASSIS REMOVAL 1 Remove cabinet back 2 Discharge 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 KL and KR and 2nd anode lead 4 Remove chassis completely by sliding it straight back ...

Page 13: ...1 Remove chassis referring to Chassis Removal instructions 2 Place cabinet front face down on the soft surface 3 Remove the screw one ach corner of the picture tube and GENTLY lift the picture tube out of the cabinet 4 Install a replacement picture tube in reverse order 5 Properly install the degaussing coil and picture tube grounding lead on the picture tube SeeFigure2 Note If the Picture Tube is...

Page 14: ... power switch of the TV set Operate the TV for at least 15 minutes Degauss the TV set using a specific degaussing coil Set the brightness and contrast to maximum Counter clockwise rotate the R B low brightness potentiometers to the end and rotate the green low brightness potentiometer to center Receive green raster pattern signals Loosen the clamp screw holding the deflection yoke assembly and sli...

Page 15: ...al convergence is obtained Circumference convergence adjustment Loosen the clamp screw holding the deflection yoke assembly and allow it tilting Temporarily put the first wedge between the picture tube and deflection yoke assembly Move front of the deflection yoke up or down to obtain better convergence in circumference Push the mounted wedge in to fix the yoke temporarily Put the second wedge int...

Page 16: ...2 I C bus control first change the bus data 2 1 Degaussing A degaussing coil is built inside the TV set Each time the TV is powered on the degaussing coil will automatically degauss the TV If the TV is magnetized by external strong magnetic field causing color spot on the screen use a specific degausser to demagnetize the TV in the following ways Otherwise color distortion will be shown on the scr...

Page 17: ...ain chassis board as the part is mounted on the main chassis board The power components etc should be checked for burnout when power on If burned out do not power on the TV again until the cause is found out 2 3 High Voltage Inspection Measure voltages of test points on the main PCB with the digital voltmeter Measure the CRT high voltage with the high voltage testing equipment and heater voltage w...

Page 18: ...0 IF PRESET VALUE 1 IFP2 00 IF PRESET VALUE2 TINT 20 BASE BAND TINT CONTROL TWBK 88 TIME OF WIDE BLANKING PWL 15 Peak white limted OIF 20 Off set if demodulatour 5HP 6HP adjustable HOR PARALLELOGRAM CORRECTION 5HB 6HB adjustable HOR BOW CORRECTION 5HSH 6HSH adjustable HORIZONTAL SHIFT 5HZD 6HZD 0A DVD HORIZONTAL SHIFT 5EWW 6EWW adjustable E W WIDTH 5EWP 6EWP adjustable E W PARABOLA WIDTH 5UCR 6UCR...

Page 19: ...sition of LOGO COL1 04 The color of first line LOGO COL2 04 The color of second line LOGO TIME 0F The time of No signal auto off IFFS 02 IF 38MHZ 03 38 9MHZ 02 45 75MHZ 01 HDOL 0A Cathode drive level AGC 03 AGC time VG2B 1A VG2 bright set SBRI 24 Sub bright MBRI 30 Max bright SCON 20 Sub contrast MCON 39 Max contrast SCOL 32 Sub color OP1 Optional 1 OP2 Optional 2 OP3 Optional 3 OP4 Optional 4 OP5...

Page 20: ...nglish Paneuro 0 5 OP_USER_LOGO USER S LOGO SETUP 0 6 OP_ON_BLACK 1 b l u e b a c k 0 b l a c k back 0 OP2 7 OP_FSL 0 0 OP_ENGLISH OSD language 1 ENGLISH 1 1 OP_CZECH OSD language 1 CZECH 1 2 OP_SLOVAK OSD language 1 SLOVAK 1 3 OP_RUSSIAN OSD language 1 RUSSIAN 1 4 OP_FRENCH OSD language 1 FRENCH 1 5 OP_GERMAN OSD language 1 GERMAN 1 6 OP_ITALY OSD language 1 ITALY 1 OP3 7 OP_SPANISH OSD language ...

Page 21: ...CH 00001 SLOVAK 00010 0 5 OP_FORF 1 6 OP_FORS OP_FORS FORF 00 AUTO 60HZ 01 KEEP LAST 10 FORCE 60HZ 11 AUTO 50HZ 1 OP7 7 OP_HOTEL_ON_PROG 1 Startup on channel 1 hotel model available0 0 OP_AUTO_TEST Power on self test 1 yes 0 no 0 1 OP_PSNS sensibility 0 2 OP_B SCREEN Black screen1 Yes 0 No 0 3 OP_SECAM 1 SECAM 1 4 OP_DFL Disable flash protection 1 5 OP_SIF 0 6 OP_EXT_SIF0 1 OP8 7 OP_EXT_SIF1 D K 0...

Page 22: ...P_BLANK BLANK 0 5 OP_BLANK BLANK 0 6 OP_BLANK BLANK 0 7 OP_TEXT_KEY 1 remote control unit TEXT key available 1 Notes The data sheet may differ dependent on different models The data sheet may differ dependent on different CRTs for the same model ...

Page 23: ...ty and compact circuit with fewer external components The chassis widely used in small and medium TVs provides much more convenience for manufacturing and technical service It includes UOC TDA9384PS N3 3 for PAL NTSC SECAM small signal processing and bus control EEPROM AT24C08 for data memory TDA4863AJ for vertical output power amplifying TFA9842AJ for audio power amplifying Thick film IC STR G565...

Page 24: ...N3 3 noTEXT 2 N100 TDA9345PS N3 3 1 page TEXT slim C R T n o Small signal processor micro control unit MCU TEXT page TEXT slim CRT1 3 N601 TFA9842AJ Audio power amplifier TDA4863AJ 4 N300 TDA4864AJ slim CRT Vertical scan output stage circuit 5 N801 STR G5653 Switch mode power supply control TAF5 C4I21 TAF5 C4I23 IF 38MHz tuner TAF5 E4I22 IF 38 9MHz tuner 6 A001 TAF5 U2F22 IF 45 75MHz tuner ...

Page 25: ...uit Integrated luminance delay line with adjustable delay time Picture improvement features with peaking with switchable centre frequency depeaking variable positive negative overshoot ratio and video dependent coring and blue and black stretching All features are available for CVBS Y C and YPBPR signals Tint control for external RGB YPBPR signals Integrated chroma band pass filter with switchable...

Page 26: ...bit Data pointer Stand by Idle and Power Down modes 14 bits PWM for Voltage Synthesis Tuning 8 bit A D converter 4 multiplexed inputs for the A D converter and 5 PWM 6 bits outputs for control of TV analogue signals TDA95XX series 4 pins which can be programmed as general I O pin ADC input or PWM 6 bit output TDA93XX series Data Capture Text memory for 1 or 10 pages In the 10 page versions invento...

Page 27: ...duction of defined area Cursor Special Graphics Characters with two planes allowing four colours per character 32 software redefinable On Screen display characters 4 WST Character sets G0 G2 in single device e g Latin Cyrillic Greek Arabic G1 Mosaic graphics Limited G3 Line drawing characters WST Character sets and Closed Caption Character set in single QUICK REFERENCE DATA SYMBOL PARAMETER MIN TY...

Page 28: ... Output signals Demodulated CVBS output V o IFVO p p peak to peak value 2 0 V sound IF intercarrier output in QSS V o QSSO rms versions RMS value 100 Mv demodulated AM sound output in V o AMOUT rms QSS versions RMS value 500 mV V o CVBSO p p selected CVBS output peak to peak value 2 0 V I o AGCOUT tuner AGC output current range 0 5 mA V oRGB p p RGB output signal amplitudes peak to peak value 2 0 ...

Page 29: ...Model no CT 21CQS5CPT doc version 1 0 29 BLOCK DIAGRAM ...

Page 30: ...decoupling of digital circuit of TV processor PH2LF 16 phase 2 filter PH1LF 17 phase 1 filter GND3 18 ground 3 for TV processor DECBG 19 bandgap decoupling AVL EWD 1 20 Automatic Volume Levelling 90versions E W drive output 110versions VDRB 21 vertical drive B output VDRA 22 vertical drive A output IFIN1 23 IF input 1 IFIN2 24 IF input 2 IREF 25 reference current input VSC 26 vertical sawtooth cap...

Page 31: ...r input BLKIN 50 black current input V guard input RO 51 Red output GO 52 Green output BO 53 Blue output VDDA 54 analog supply of Teletext decoder and digital supply of TV processor 3 3 V VPE 55 OTP Programming Voltage VDDC 56 digital supply to core 3 3 V OSCGND 57 oscillator ground supply XTALIN 58 crystal oscillator input XTALOUT 59 crystal oscillator output RESET 60 reset VDDP 61 digital supply...

Page 32: ...mperature measurements inside the chip This gives maximum output power for all supply voltages and load conditions with no unnecessary audio holes Almost any supply voltage and load impedance combination can be made as long as thermal boundary conditions number of channels used external heatsink and ambient temperature allow it 2 2 Features 2 Channel SE 1 W to 7 5 W operation possibility Soft clip...

Page 33: ...Model no CT 21CQS5CPT doc version 1 0 33 ...

Page 34: ...the supply voltages are independently adjustable to optimize power consumption and flyback time For the TDA4863AJ or TA4864AJ the flyback supply voltage will be generated internally by doubling the supply voltage and therefore a separate flyback supply voltage is not needed 3 3 Block diagram of TDA4863AJ and TDA4864AJ PIN SYMBOL DESCRIPTION 1 VP1 positive supply voltage 1 2 VP3 flyback generator o...

Page 35: ... including erase Byte write and page write programming between 1 and 16 bytes Typical programming time 6ms 1 0ms for up to 16 bytes High reliability Endurance 106 cycles 1 Data retention 40 years 1 ESD protection 4000 V on all pins 8 pin DIP DSO packages Available for extended temperature ranges Industrial 40to 85 Automotive 40to 125 4 2 Pin Configuration 4 3 Pin Description SERIAL CLOCK SCL The S...

Page 36: ...QS5CPT doc version 1 0 36 4 4 Memory Organization AT24C08 8K SERIAL EEPROM Internally organized with 64 pages of 16 bytes each the 8K requires a 10 bit data word address for random word addressing 4 4 5 Block Diagram ...

Page 37: ...MOSFET with a high precise error amplifier The ICs feature fewer external components small size and standard power supply 5 2 Block Diagram Terminal No Symbols Description Functions 1 D Drain Terminal MOS FET drain 2 S Source Terminal MOS FET source 3 GND Ground Terminal Ground 4 VIN Power supply Terminal Input of power supply for control 5 O C P F B Over current Feedback Input of over current det...

Page 38: ...Model no CT 21CQS5CPT doc version 1 0 38 APPENDIX ...

Page 39: ......

Page 40: ...200A 50810012410 CHIP CAP 0805CG470J500NT 2 C582 C585 50810012430 CHIP CAP 0805CG561J500NT 1 C215A 52A72680J04 CHIP CAP 0805CG681J500NT 1 C240 50810012440 CHIP CAP 0805CG821J500NT 1 C171A 50810013650 CHIP CAP 0805CG102J500NT 7 C165 50810012330 CHIP CAP 0805B102K500NT C166 C186A C233 C430 C508 C509 50810012340 C 0805B222K500NT 1 C157 50810012550 CHIP RES 0805B332K500NT 2 C047 C168 C061 C159 5081001...

Page 41: ...2 C801 C804 526134P7M11 ELECTROLYTIC CAP CD110X 16V 4 7μFM 1 C486 52623010060 ELECTROLYTIC CAP CD110X 16V 10μFM 10 C169 C501 C502 C507 C572 C581 C595 C584 C583 C586 52613470M11 ELECTROLYTIC CAP CD110X 16V 47μFM 3 C242 C051 C125 52613101M11 ELECTROLYTIC CAP CD110X 16V 100μFM 8 C013 C033 C188 C190A C217 C592A C827 C866 52613102M11 ELECTROLYTIC CAP CD110X 16V 1000μFM 1 C153 52613222M11 ELECTROLYTIC C...

Page 42: ...RES RT13 0 166W 100KΩJ 2 R603 RS604 50620071310 CARBON RES RT14 0 25W 4 7KΩJ 2 R649 R650 52532472K11 CERAMIC RES CT1 63V 10C 2B4 4700PFK 2 C601 CS602 52367224J10 MYLAR RES CL21X 50V 0 22μFJ 2 C603 CS604 52623010060 ELECTROLYTIC CAP CD110X 16V 10μFM 3 C125B C611 C512 52613220M11 ELECTROLYTIC CAP CD110X 16V 22μFM 1 C605 52613221M11 ELECTROLYTIC CAP CD110X 16V 220μFM 1 C606 52616102M11 ELECTROLYTIC C...

Page 43: ...212082AT5 DIODE W05Z8 2A 1 D931 62126880010 AUDION 2SC2688 L 3 V901 62126880010 AUDION 3DA2688 L V911 50650030570 AUDION 3DA2688 V921 50650030520 AUDION 3DA2688 F 637080422W5 AUDION BF422 3 V902 637080422W5 AUDION 3DG422 V912 V922 637080423W5 AUDION BF423 3 V903 637080423W5 AUDION 3CG423 V913 V923 50910010000 GZS CRT SOCKET GZS8 6 AC 1 GZ01 5360861F000 GZS CRT SOCKET GZS8 6 1F 515172P7J90 FUSE RES...

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