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akira CT-14XBS1 Service Manual

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Summary of Contents for akira CT-14XBS1

  • Page 2 CHASSIS:TB-8803 MODEL: CT-14XBS1...

  • Page 3: Table Of Contents

    SAFETY INSTRUCTIONS ........................5 CIRCUIT ADJUSTMENTS........................6 FAULT FINDING TREES, DIAGRAMS AND OVERVIEWS............12 VARIOUS PARAMETERS OF INTEGRATED CIRCUIT ..............25 THE BUS DATA FOR TMPA8803....................... 25 ELECTRICAL PARTS LIST......................... 28 CIRCUIT DIAGRAM ..........................37 Model No: CT-14XBS1 Version 1.0...

  • Page 4: General Description

    Table 1: A14T02 mainly ICs and functions Position Type Function Description N204 TMPA8803/23/21 Micro controller and small signal processor (UOC) N901 ST24C16-W EEPROM N701 LA4267 Sound power amplifier N402 LA78040 Vertical scan output stage circuit N203 LC4053B/CD4053B AV1/AV2 Switch Model No: CT-14XBS1 Version 1.0...
  • Page 5 RECEIVER (N901) A901 ST24C16 HORIZONTAL HORIZONTAL FBT(T402) DRIVE T401 OUTPUT BSC23 V444 V411 POWER SUPPLY AC150-260V CIRCUIT Resistance Bridge +300V 50/60Hz Filter V512、 V513、 V511、 disturbance rectification C507 146V T501、 VD515 C501、 L502 VD503-VD506 114V Model No: CT-14XBS1 Version 1.0...

  • Page 6: Safety Instructions

    When replacing a burnout fuse, use the one with the same specifications as the original. When replacing old wire, wind new one round the shaft to weld. When replacing components with safety in performance, use the same type as that specified by AKIRA and install it in the former way.

  • Page 7: Circuit Adjustments

    B+ adjustment, TV signal receiving Item AKTP01/02 chassis Measuring TV SG (Signal Generator) Equipment Digital multi-meter Preparation The set is turned on Before Adj. Connect the TV SG to RF input terminal of the set. Model No: CT-14XBS1 Version 1.0...
  • Page 8 Press P+ or P- key to inspect the set if there is channel skipped, if so, searching again by SEARCH as above described. TV system adapting & AV in/output inspection Item AKTP01/02 chassis Measuring SG (with NTSC3.58). User remote controller Equipment Dual trace oscilloscope Preparation Input TV and AV signal before Adj. Model No: CT-14XBS1 Version 1.0...
  • Page 9 Stop the focus adj. VR at the point that focus is a bit worse at once, turn back to the left and then turn back to the right a little again. To be fine H. line V. line Magnified drawing of part Model No: CT-14XBS1 Version 1.0...
  • Page 10 RF AGC to 6.2±0.05V that is read on the digital multi meter. Vertical height, linearity and Hor. position adjustment Item AKTP01/02 chassis Measuring Equipment No.2 and No.3 service remote controllers Preparation Brightness, contrast and color should be set in standard before Adj. Model No: CT-14XBS1 Version 1.0...
  • Page 11 X (mute), DISP (display), PP and SLEEP key respectively, the relevant function should Press be normal. Press S-OUT key on No.5 service remote controller to set default value that stored in E 2 PROM on the chassis for product shipment. Model No: CT-14XBS1 Version 1.0...

  • Page 12: Fault Finding Trees, Diagrams And Overviews

    FAULT FINDING TREE, DIAGRAMS AND OVERVIEW Three-None (no raster, no picture, no sound) This failure is mainly caused by big-power circuit such as power supply, horizontal scanning, vertical scanning. The detail checking and repairing steps are as follow. Model No: CT-14XBS1 Version 1.0...
  • Page 13 Check V411,T402,T401, C515,C517,V411, Deflection coil VD552-VD555 115V Test the voltage of C415,C418,T402 N204 pin64 C412 Check T402,V411,R449 Check T402 Check L414,VD403,C411 4.5-5.5V Deflection coil CPU has sent the Check if V572 Power-off signal is broken down Model No: CT-14XBS1 Version 1.0...
  • Page 14 Note : In the TV test, we mainly observe the noise wave on the CRT and listen to the noise voice liking as “Ka…..Ka” from the loudspeakers. No picture (see the diagram on next page). Model No: CT-14XBS1 Version 1.0...
  • Page 15 No picture Check if A101 has input signal Check R553,N904,C926 Out of the “ 0-33V ” range Check the “ VT ” voltage when auto searching The voltage on the C926 Check RF signal input and adaptor In the “ 0-33V ” range No variation Check the “...
  • Page 16 (B1) may be referred without picture. The detail checking and repairing steps are as follow. Note: Before repairing, assure that the volume is on and the state of set is in “TV”. Please see the diagram on next page. Model No: CT-14XBS1 Version 1.0...
  • Page 17 The voltage on pin 9,10,11of N203 Check VD552,R573,C717,T501,N701 Hear if there is the voice liking “Ka…Ka ” in the loudspeaker via using “ Signal-input way ” by touching pin 7 of N701 Check R290,N902, N204 Check SP301, SP302, N701 Model No: CT-14XBS1 Version 1.0...
  • Page 18 CRT only moves in the horizontal orientation, so form this failure. (While checking horizontal and vertical deflection circuit’ s failure, we have better to use an oscilloscope.) Please see the diagram on next page. Model No: CT-14XBS1 Version 1.0...
  • Page 19 The deflection yoke on the CRT Check R328, C446, N402, N204 Abnormal Measuring the waveform on pin 5 of N402 Check N402 Normal Measuring the waveform on the deflection yoke Abnormal Check R442,C413,VD433,XZ411, deflection yoke Model No: CT-14XBS1 Version 1.0...
  • Page 20 The circuit around pin6 of N204 is called auto-reset circuit. If UOC detects errors in resetting, it will come to the state of programme protected. The detail checking and repairing steps are as follow: Model No: CT-14XBS1 Version 1.0...
  • Page 21 Check R574,VD922 Check T501, VD553,R558 Check N204 Check the voltage on the emitter of V902 4.98V 4.98V Check the voltage on the positive pole of VD902 Check R941 4.98V =3.6V Check R946,R945,V902 Check VD902, R947 Model No: CT-14XBS1 Version 1.0...
  • Page 22 We can judge this failure by measuring the wave of the character in an oscilloscope. The detail checking and repairing steps are as follow: No OSD Check the wave on the pin 4 of FBT Check FBT T402 Check C452, R462, VD436, R321, N204 Model No: CT-14XBS1 Version 1.0...

  • Page 23: Various Parameters Of Integrated Circuit

    Input terminals for IF signals. RF AGC Output terminal for RF AGC control level. TV YC Vcc Vcc terminal for Y/C circuit. Supply 5V. Monitor out Output terminal for CVBS or Y sihnal selected by BUS(Video SW). Model No: CT-14XBS1 Version 1.0...
  • Page 24 Power supply C: Pin functions of N402 ( LA78040 ) Symbol Function V.IN Inverting input Power supply PUMP UP Pump up out V.OUT Vertical output VCC2 Output stage VCC NON INV IN Non inv input Model No: CT-14XBS1 Version 1.0...

  • Page 25: The Bus Data For Tmpa8803

    SECAM mode 0:OFF center 1: ON 35kHz HPOS Horizontal center of 50 Hz VP50 Vertical centering of 50 Hz Vertical amplitude of 50 Hz Horizontal centering difference of 60 Hz VP60 Vertical centering difference of 60 Hz Model No: CT-14XBS1 Version 1.0...
  • Page 26 FOR YcbCr B CUTOFF GDRVS FOR YcbCr G DRIVE BDRVS FOR YcbCr B DRIVE NOIS H AFC CONTROL AOPT AKB OPTION AV OPT AV OPTION OPT2 Factory Data WAIT TIME Factory Data CUR CEN Factory Data Model No: CT-14XBS1 Version 1.0...
  • Page 27 CUR STEP Factory Data AUSTP When Mute off ,Vol.ATT up step number MODE0 Factory Data MODE1 Factory Data OSDF OSD width OSD position Factory Data NOTE: The data provided in the form provides to consult only! Model No: CT-14XBS1 Version 1.0...

  • Page 28: Electrical Parts List

    R323 D10B101J-T Carbon resistor RT13-1/6W-100Ω±5% R609 D10B101J-T Carbon resistor RT13-1/6W-100Ω±5% W214 D10B101J-T Carbon resistor RT13-1/6W-100Ω±5% R201 D10B151J-T Carbon resistor RT13-1/6W-150Ω±5% R404 D10B151J-T Carbon resistor RT13-1/6W-150Ω±5% R601 D10B151J-T Carbon resistor RT13-1/6W-150Ω±5% R611 D10B151J-T Carbon resistor RT13-1/6W-150Ω±5% Model No: CT-14XBS1 Version 1.0...
  • Page 29 R249 D10B392J-T Carbon resistor RT13-1/6W-3.9KΩ±5% R251 D10B392J-T Carbon resistor RT13-1/6W-3.9KΩ±5% R446 D10B392J-T Carbon resistor RT13-1/6W-3.9KΩ±5% R916 D10B392J-T Carbon resistor RT13-1/6W-3.9KΩ±5% R928 D10B392J-T Carbon resistor RT13-1/6W-3.9KΩ±5% R930 D10B392J-T Carbon resistor RT13-1/6W-3.9KΩ±5% R945 D10B472J-T Carbon resistor RT13-1/6W-4.7KΩ±5% Model No: CT-14XBS1 Version 1.0...
  • Page 30 R1001 D10B333J-T Carbon resistor RT13-1/6W-33KΩ±5% R450 D10B473J-T Carbon resistor RT13-1/6W-47KΩ±5% R246 D10B683J-T Carbon resistor RT13-1/6W-68KΩ±5% R243 D10B104J-T Carbon resistor RT13-1/6W-100KΩ±5% R473 D10B104J-T Carbon resistor RT13-1/6W-100KΩ±5% R7003 D10B104J-T Carbon resistor RT13-1/6W-100KΩ±5% R233 D10B224J-T Carbon resistor RT13-1/6W-220KΩ±5% Model No: CT-14XBS1 Version 1.0...
  • Page 31 R550 ! Fuse resistor F10D1R0J-C RF10-1/2W-1Ω±5% R573 ! F10D1R0J-C Fuse resistor RF10-1/2W-1Ω±5% R449 W11H3R9K Wire-wound resistor RXG6-5W-3.9Ω-J R502 ! W10J3R9K Wire-wound resistor RXG6-6W-3.9Ω-J PS551 P10X180J-C Thermistor PTC-180HM RP501 V11D202B Potentiometer WI06-2AA2KΩ C902 C2CF200J-T Ceramic capacitor CC1-06A-CH-50/63V-20pF-J Model No: CT-14XBS1 Version 1.0...
  • Page 32 C2BW102K-O Ceramic capacitor CT81-08C-2R-1KV-1000pF-K C555 C2BW471K-O Ceramic capacitor CT81-08C-2R-1KV-470pF-K C556 C2RX221K-O Ceramic capacitor CT81-08C-2R-2KV-220pF-K C418 C2RX471K-O Ceramic capacitor CT81-08C-2R-2KV-470pF-K VD530 C2RX681K-O Ceramic capacitor CT81-08C-2R-2KV-680pF-K C630 C2EX222Z-O Ceramic capacitor CT81-08C-2R-2KV-2200pF-K C535 ! C2EM102M-O Ceramic capacitor CTJ1-AC250V-1000PF-±20% Model No: CT-14XBS1 Version 1.0...
  • Page 33 E20FR47M-T Electrolytic Capacitor CD110-50V-0.47uF –M C204 E20FR47M-T Electrolytic Capacitor CD110-50V-0.47uF –M C301 E20FR47M-T Electrolytic Capacitor CD110-50V-0.47uF –M C303 E20FR47M-T Electrolytic Capacitor CD110-50V-0.47uF –M C308 E20FR47M-T Electrolytic Capacitor CD110-50V-0.47uF -M C205 E20F1R0M-T Electrolytic Capacitor CD110-50V-1uF –M Model No: CT-14XBS1 Version 1.0...
  • Page 34 L104 L3X1150K-T Inductor LGA0307-15uH-K L201 L3X1150K-T Inductor LGA0307-15uH-K L230 L3X1150K-T Inductor LGA0307-15uH-K L302 L3X1150K-T Inductor LGA0307-15uH-K L305 L3X1150K-T Inductor LGA0307-15uH-K L901 L3X1150K-T Inductor LGA0307-15uH-K L501 ! LMXX0002 Degaussing coil VD515 ! RX0001XX Photoelectricity coupler PC817B/C Model No: CT-14XBS1 Version 1.0...
  • Page 35 IXXX0173 BR ST24C16-W V230 RXA1015X-T Audion 2SA1015Y/2SA608/2SA733Q V232 RXA1015X-T Audion 2SA1015Y/2SA608/2SA733Q V233 RXA1015X-T Audion 2SA1015Y/2SA608/2SA733Q V302 RXA1015X-T Audion 2SA1015Y/2SA608/2SA733Q V511 RXA1015X-T Audion 2SA1015Y/2SA608/2SA733Q V602 RXA1015X-T Audion 2SA1015Y/2SA608/2SA733Q V902 RXA1015X-T Audion 2SA1015Y/2SA608/2SA733Q V570 RXB764XX-T Audion 2SB764 Model No: CT-14XBS1 Version 1.0...
  • Page 36 Touch switch PUSH SW.(L:5mm) SW1003 KXXX0101 Touch switch PUSH SW.(L:5mm) SW1004 KXXX0101 Touch switch PUSH SW.(L:5mm) SW1005 KXXX0101 Touch switch PUSH SW.(L:5mm) SW1006 KXXX0101 Touch switch PUSH SW.(L:5mm) Z901 XC0004XX-A XTLO 8.0M(20P) FXXX0020 IRICO 37SX110Y22-DC05 Model No: CT-14XBS1 Version 1.0...

  • Page 37: Circuit Diagram

    Circuit diagram...