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akira CT-14XA9A, Service Manual

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akira CT-14XA9A Service Manual Download Page 10

 

10 

 

Model No: CT-14XA9A 
Version 1.0

 

 

 
 
 
Fig. 1 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fig 2. 
 
 

Summary of Contents for CT-14XA9A

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 14XA9A Version 1 0 M M Mo o od d de e el l l G G Gr r ro o ou u up p p C C CT T T 1 1 14 4 4X X XA A A9 9 9 CHASSIS EX 1A1 MODEL CT 14XA9A...

Page 3: ...Safety instructions 5 Safety precaution 6 Product safety notice 7 Adjustment 9 Control buttons 19 Structure chassis function description 24 Service data 27 Replacement parts 49 Circuit diagram 67 Exp...

Page 4: ...25MHz 168 25 216 25MHz UHF C 13 C57 471 25 863 25MHz CATV Z1 Z7 111 0 167 0MHz Z8 Z35 223 0 447 0MHz Channels preset 236 Antenna input 75 ohm unbalanced Picture tube Effective screen dimensions Approx...

Page 5: ...gh Voltage Check procedure in this manual 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...

Page 6: ...und 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 s...

Page 7: ...th other large power equipment Doing so may result in too large load causing fire 4 Do not allow anything to rest on or roll over the power cord Protect the power cord from being walked on modified cu...

Page 8: ...l 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...

Page 9: ...f the TV set 1 3 Operate the TV for at least 15 minutes 1 4 Degauss the TV set using a specific degaussing coil 1 5 Set the brightness and contrast to maximum 1 6 Counter clockwise rotate the R B low...

Page 10: ...10 Model No CT 14XA9A Version 1 0 Fig 1 Fig 2...

Page 11: ...ergence is obtained 2 2 Circumference convergence adjustment 2 2 1 Loosen the clamp screw holding the deflection yoke assembly and allow it tilting 2 2 2 Temporarily put the first wedge between the pi...

Page 12: ...12 Model No CT 14XA9A Version 1 0 Fig 3...

Page 13: ...n 1 4 Turn on the degausser Slowly move it around the screen and slowly take it away from the TV 1 5 Repeat the above steps until the TV is degaussed completely 2 Supply Voltage Adjustment Caution B v...

Page 14: ...ord to be infinity with a DC 500 high resistance meter and insulation resistance between the naked metal and degaussing coil to be over 20M12 6 DESIGN SERVICE mode 6 1 To enter the USER SERVICE mode C...

Page 15: ...correction for large screen only 5EWT 6EWT 1F Trapezoidal correction for large screen only 5VSL 6VSL 1F Vertical slope for large screen only 5VAM 6VAM 1F Vertical amplitude For 50Hz 5VAM is displayed...

Page 16: ...To write in logo use the buttons to highlight an adjustment and the buttons to adjust 3 The data sheet may differ dependent on different models 4 The data sheet may differ dependent on different CRTs...

Page 17: ...CT_ SWITCH_ON Memory power on If turned off by the remote control then the TV is turned on by the remote control if turned off by the MAIN POWER SWITCH then turned on by the MAIN POWER SWITCH 1 2 OP_H...

Page 18: ...P_PSNS Sensitivity 0 2 OP_BSCREEN Black screen when changing channels 1 yes 0 No 1 3 OP_SECAM 1 SECAM option 1 4 OP_DFL Disable flash protection 0 5 OP_SIF External input for sound IF circuit 1 6 OP_E...

Page 19: ...19 Model No CT 14XA9A Version 1 0 CONTROL BUTTONS 1 Control Buttons 1 1 Rear panel 1 2 Front panel...

Page 20: ...or and INDEX buttons also function as fast menu selection in the TV mode Notes 1 When in operation please point your remote control directly to the infrared sensor 2 Do not expose the remote control t...

Page 21: ...am in the TUNING menu press the VOL button The TV will search automatically in sequence After auto search the TV will store receivable channels and returns to POS 1 Unused position number is automatic...

Page 22: ...can dramatically quicken channel selection After select Skip in the TUNING menu press the VOL VOL buttons to set Skip On When the TUNING menu has disappeared press the CH CH buttons and you will find...

Page 23: ...eing received is good in ease of influencing picture definition 4 Color temperature adjustment You may select one of color of background as preferred among Normal Cool and Warm mode The adjusted Color...

Page 24: ...24 Model No CT 14XA9A Version 1 0 STRUCTURE AND CHASSIS FUNCTION DESCRIPTION Structure Block Diagram Fig 4 Structure Block Diagram for EX 1A1 Chassis Series...

Page 25: ...25 Model No CT 14XA9A Version 1 0 Block Diagram For Supply Voltage System Fig 5 Block Diagram for EX 1A 1A1 1A2 Supply Voltage System...

Page 26: ...series PAL NTSC SECAM reception 100 236 programs preset Various input output terminals including SCART RCA and S VIDEO Selectable picture sound modes Multilingual on screen display TELETEXT option Aud...

Page 27: ...can be made between versions with mono inter carrier sound FM demodulator and versions with QSS IF amplifier The mono inter carrier sound versions have a selective FM PLL demodulator which can be swit...

Page 28: ...WatchDog timer Auxiliary RAM page pointer 16 bit Data pointer Stand by Idle and Power Down PD mode 14 bits PWM for Voltage Synthesis Tuning 8 bit A D converter 4 pins which can be programmed as genera...

Page 29: ...Globally selectable scan lines per row 9 10 13 16 and character matrix 12x10 12x13 12x16 VxH Fringing Shadow selectable from N S E W direction Fringe colour selectable Meshing of defined area Contras...

Page 30: ...center frequency Audio switch Automatic Volume Levelling Automatic Volume Levelling or subcarrier output for combfilter applications Qss sound IF amplifier with separate input and AGC circuit AM sound...

Page 31: ...31 Model No CT 14XA9A Version 1 0 3 Block diagram...

Page 32: ...32 Model No CT 14XA9A Version 1 0...

Page 33: ...se 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 East West drive output VDRB 21 vertical drive B output VDRA 22...

Page 34: ...port 1 2 or external interrupt 0 input Notes 1 The function of pin 20 28 29 31 32 35 and 44 is dependent on the IC version mono inter carrier FM demodulator QSS IF amplifier and East West output or no...

Page 35: ...35 Model No CT 14XA9A Version 1 0 Fig 8 Pin Configuration SDIP 64...

Page 36: ...ne side connected to an independent input output Y0 and Y1 and the other side connected to a common input output Z With E LOW one of the two switches is selected low impedance ON state by Sn With E HI...

Page 37: ...Package Designator North America Pinning YOA to YOC Independent inputs outputs Y1A to Y1C Independent inputs outputs SA to SC Select inputs E Enable input active LOW ZA to ZC Common inputs outputs 3 F...

Page 38: ...plifier TDA7057AQ TDA7057AQ 2x8W Stereo BTL Audio Output Amplifier with DC Volume Control 1 Features DC volume control Few external components Mute mode Short circuit proof No switch on and switch off...

Page 39: ...39 Model No CT 14XA9A Version 1 0 Fig 12...

Page 40: ...ircuit of the output pins 7 and 4 Short circuit of the output pins to Temperature protection High EMC immunity because of common mode inputs A guard signal in zoom mode 2 General Description The TDA83...

Page 41: ...Adaptation to Different Sources One Stereo Output Treble and Bass Control in 2 0dB Steps Volume Control in 1 0dB Steps Two Speaker Attenuators Two Independent Speaker Control in 1 0db Steps for Balanc...

Page 42: ...42 Model No CT 14XA9A Version 1 0 3 Block Diagram Fig 15 4 Pin Connection Fig 16...

Page 43: ...to 24dB 1 0 0 1 0 dB EA Attenuation Set Error AV 24 to 47dB 1 5 0 1 5 dB AV 0 to 24dB 0 1 dB ET Tracking Error AV 24 to 47dB 0 2 DB VDC DC Step adjacent attenuation steps from 0dB to AV max 0 0 5 3 mv...

Page 44: ...zed as 1024 2048 bytes and 64 128 pages x 16 bytes Page protection mode flexible page by page hardware write protection Additional protection EEPROM of 64 128 bits 1 bit per data page Protection setti...

Page 45: ...45 Model No CT 14XA9A Version 1 0 2 Pin Configuration Fig 17 3 Block Diagram...

Page 46: ...cycle current limiting under voltage lockout with hysteresis over voltage protection and thermal shutdown protects the power supply during the normal overload and fault conditions Low current startup...

Page 47: ...47 Model No CT 14XA9A Version 1 0 3 Pin Configuration and Functions...

Page 48: ...nction for STR F6654 Pin No Symbol Function Description 1 OCP FB Over current protection detection signal voltage limiting signal input 2 S MOSFET source 3 D MOSFET drain 4 VIN Supply voltage input fo...

Page 49: ...166W 68 Ohm J R048 Carbon film resistor NAS1 6680J R302 Carbon film resistor RT13 0 166W 68 Ohm J R302 Carbon film resistor NAS1 6680J R303 Carbon film resistor RT13 0 166W 75 Ohm J R303 Carbon film...

Page 50: ...R364 Carbon film resistor RT13 0 166W 100 Ohm J R364 Carbon film resistor NAS 1 6101J R430A Carbon film resistor RT13 0 166W 100 Ohm J R430A Carbon film resistor NAS1 6101J RCLM Carbon film resistor R...

Page 51: ...Carbon film resistor RT13 0 166W 470 Ohm J R361 Carbon film resistor NAS 1 6471J R879 Carbon film resistor RT13 0 166W 470 Ohm J R879 Carbon film resistor NAS1 6471J R107 Carbon film resistor RT13 0...

Page 52: ...film resistor RT13 0 166W 2 2K Ohm J R065 Carbon film resistor NAS1 6222J R248 Carbon film resistor RT13 0 166W 2 2K Ohm J R248 Carbon film resistor NAS1 6222J R265 Carbon film resistor RT13 0 166W 2...

Page 53: ...R009 Carbon film resistor RT13 0 166W 10K Ohm J R009 Carbon film resistor NAS1 6103J R137A Carbon film resistor RT13 0 166W 10K Ohm J R137A Carbon film resistor NAS1 6103J R137B Carbon film resistor R...

Page 54: ...05 Carbon film resistor RT13 0 166W 10K Ohm J RX205 Carbon film resistor NAS 1 6103J R002 Carbon film resistor RT13 0 166W 10K Ohm J R002 Carbon film resistor NAS1 6103J R158 Carbon film resistor RT13...

Page 55: ...003 Carbon film resistor RT13 0 166W 68K Ohm J R003 Carbon film resistor NAS1 6683J R006 Carbon film resistor RT13 0 166W 100K Ohm J R006 Carbon film resistor NAS 1 6104J R109 Carbon film resistor RT1...

Page 56: ...25W 4 7K Ohm J R872 Carbon film resistor NAS1 4472J R872A Carbon film resistor RT14 0 25W 5 1K Ohm J R872A Carbon film resistor NAS1 4512J R403 Metal film resistor RT14 0 25W 5 1K Ohm J R167 Metal fi...

Page 57: ...r CC 1 63V 06a SL 47PFJ C371A Ceramic capacitor CCl 63V 06a SL 47PFJ C381A Ceramic capacitor CC1 63V 08a C 100PFJ C003 Ceramic capacitor CC 1 63V 08a C 100PFJ C882 Ceramic capacitor CCl 63V 08a C 100P...

Page 58: ...2E4 1000PFM Y1 C809 Ceramic capacitor CT81 400VAC 11c 2E4 1000PFM Y1 C810 Ceramic capacitor CT81 1KV 10C 2B4 1000PFM C811 Ceramic capacitor CT81 1KV 10C 2B4 1000PFM C871 Ceramic capacitor CT81 1KV 10C...

Page 59: ...or CL21X 50V 470MFJ C481 Polyester film capacitor CL21X 100V 0 22MFJ C512 Polypropylene capacitor CBB21 160V 0 056MFJ C801 Polypropylene capacitor CL21X 250V 0 1MFJ C802 Polypropylene capacitor CBB 13...

Page 60: ...ctrolytic capacitor CD 110X 16V 100MFM C477 Aluminum electrolytic capacitor CD 110X 16V 220MFM C453 Aluminum electrolytic capacitor CD 110X 16V 220MFM C116 Aluminum electrolytic capacitor CD 110X 16V...

Page 61: ...MHJ IA21 Feed through inductor TEM2000 IA22 Feed through inductor TEM2000 L502 Feed through inductor TEM2011 L506 Horizontal linear inductor TEM2011 L505 Width coil ZZ008 VD882 Diode HXT49 D895 Diode...

Page 62: ...3CG1015 Y V353 Triode 2PA1015 Y V890 Triode 2SA1015 Y V890 Triode 3CG1015 Y V890 Triode 2PAI015 Y V251 Triode 2SA1015 Y V251 Triode 3CG1015 Y V251 Triode 2PA1015 Y VX200 Triode 2SA1015 Y VX200 Triode...

Page 63: ...15 Y V391 Triode 2SC1815 Y V391 Triode 2PC 1815 Y V605 Triode 3DG1815 Y V605 Triode 2SC1815 Y V605 Triode 2PC1815 Y V871 Triode 3DG18i5 Y V871 Triode 2SC1815 Y V871 Triode 2PC1815 Y V888 Triode 3DG181...

Page 64: ...F16 T804 Switch transformer BCK 24005L JUB4 726 083 F801 Delay fuse RT20 250V 3 15A XS801 AV terminals AYLP 33 9YUV T401 FBT BSC60H JUB4 799 044 1 XS301 S terminals PH S KK01 Feather touch switch KA3...

Page 65: ...esistor NAS1 4221J RY16 Carbon film resistor RT14 0 25W 220 Ohm J RY16 Carbon film resistor NAS1 4221J RY17 Carbon film resistor RT14 0 25W 330 Ohm J RY17 Carbon film resistor NAS1 4331J RY18 Carbon f...

Page 66: ...JS 2A VY01 Triode 3DA2688F VY01 Triode 2SC2688 L VY02 Triode 3DA2688F VY02 Triode 2SC2688 L VY03 Triode 3DA2688F VY03 Triode 2SC2688 L VY04 Triode BF422 VY06 Triode BF422 VY08 Triode BF422 VY05 Triode...

Page 67: ...Model no CT 14XA9A Version 1 0 CIRCUIT DIAGRAM 67...

Page 68: ...Model no CT 14XA9A Version 1 0 CIRCUIT DIAGRAM 68...

Page 69: ...Model no CT 14XA9A Version 1 0 EXPLODED VIEWEXPLOW 69...

Page 70: ...1 0 PART LIST NO PART NAME QTY 1 Main board assembly 1 2 CRT assembly 1 3 Front cover 1 4 Back cover 1 5 CRT RGB PCB assembly 1 6 Seal cap 1 7 Rubber spacer 4 8 Tapping screw 4 x 12BTHO 4 9 Tapping sc...

Page 71: ...Model no CT 14XA9A Version 1 0 WIRING DIAGRAM 71...

Page 72: ...Model no CT 14XA9A Version 1 0 PBC BOARD 722...

Page 73: ...Model no CT 14XA9A Version 1 0 PBC BOARD 733...

Page 74: ...Model no CT 14XA9A Version 1 0 PBC BOARD 74...

Page 75: ...Model no CT 14XA9A Version 1 0 PBC BOARD 755...

Page 76: ...Model no CT 14XA9A Version 1 0 PPBC BOARD 766...

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