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akira CT-21CBS5CPH Service Manual

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Summary of Contents for akira CT-21CBS5CPH

  • Page 2 Model: Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 3: Table Of Contents

    STRUCTION BLOCK DIAGRAM......................... 20 SERVICE DATA ..........................22 TECHNICAL DATA OF KEY ICs ......................... 22 SERVICE DATA OF KEY ICs ..........................43 APPENDIX ............................47 CIRCUIT DIAGRAM PARTS LIST Please read this manual carefully before service. Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 4: Safety Instructions And Maintenance

    4. Service and adjustment of the TV may result in changes in the nominal EHT voltage of the CRT anode. So ensure that the maximum EHT voltage does not exceed the rated value after service and adjustment. Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 5: Safety Precaution

    When replacing safety components identified by the international hazard symbols on the circuit diagram and parts list, it must be the company-approved type and must be mounted as the original. 8. Keep wires away from high temperature components. Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 6: Product Safety Notice

    TV near any heat sources such as radiators, heat registers, stove, or other apparatus that produce heat. 6. Service personnel should observe the SAFETY INSTRUCTIONS in this manual during use and servicing of this TV set. Otherwise, the resulted damage is not protected by the manufacturer. Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 7: Safety Symbol Description

    SAFETY SYMBOL DESCRIPTION Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 8: Maintenance

    6. Unplug the TV set from the wall outlet before cleaning or polishing it. Use a dry soft cloth for cleaning the exterior of the TV set or CRT screen. Do not use liquid cleaners or aerosol cleaners. Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 9: Mechanica Disassembling

    (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. Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 10: Picture Tube Removal

    5. Properly install the degaussing coil and picture tube grounding lead on the picture tube. SeeFigure2. Note: If the Picture Tube is being replaced, mount the Degaussing Coi l on the picture tube. See following Figure1.Cabinet Back Removal Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 11: Adjustments

    1.9 Slowly move the deflection yoke assembly forward or backward until a uniform green screen is obtained. 1.10 Tighten the clamp screw of the assembly temporarily. Check purity of the red raster and blue raster until purities of the three rasters meet the requirement. Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 12 2.2.6 Detach the temporarily mounted wedge and put it in either upper space. Fasten the deflection yoke assembly on the picture tube. 2.2.7 After fastening the three wedges, recheck overall convergence and ensure to get optimal convergence. Tighten the lamp screw holding the deflection yoke assembly. Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 13 Generally, white balance adjustment is made with professional equipment. It’s not practical to get good white balance only through manual adjustment. For TVs with I C bus control, change ² the bus data to adjust white balance. Fig. 2 Fig.3 Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 14: Circuit Adjustments

    It’s impossible to check the power part separately from the main 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. Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 15 Measure resistance between naked metal of the TV and feed end of the power cord to be infinity with a DC-500 high resistance meter and insulation resistance between the naked metal and degaussing coil to be over 200mΩ Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 16 As the control data have dramatic effects on functions and performance of the TV, service personnel should not tell user how to enter the SERVICE mode to avoid improper data settings. 6.2 Adjustment bus data (GDET0101-07) Table 3 Function Description for Bus Data Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 17 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 18 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 19 Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 20: Structure And Chassis Function Description

    STRUCTURE and CHASSIS FUNCTION DESCRIPTION 1. BLOCK DIAGRAM Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 21 ● AV stereo ● I C bus control ● Electronic program table ● Intelligent lock ● Biorhythm ● Calendar inquiry The chassis mainly uses the following ICs and assemblies. Table 5 - Key ICs and Assemblies Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 22: Service Data

    PIF, SIF, Video, multi-standard chroma, Sync, RGB processors. Mask ROM: TMPA8873CMANG (ROM size: 32k) Mask ROM: TMPA8873CPANG (ROM size: 48k) Mask ROM: TMPA8873CRANG (ROM size: 56k) Mask ROM: TMPA8873CSANG (ROM size: 64k) OTP ROM: TMPA8873PSANG (ROM size: 64k) Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 23 2. FEATURE Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 24: Block Diagram

    3. BLOCK DIAGRAM Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 25 While RESET of MCU is active, the MCU function stops. Hardware and software initialization sequence including power supplies control is required, because status of any hardware after the RESET period is unknown especially horizontal oscillator which is a very basic timing generator of SP operation. Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 26 5. TERMINAL INTERFACE Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 27 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 28 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 29 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 30 SIGNAL PROCESSOR BLOCK Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 31 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 32 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 33 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 34 Microcontrollers Descriptions (MROM version: TMPA8873CMANG / CPANG / CRANG /CSANG) Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 35: General Description

    ■ Outputs short-circuit protected to ground, supply and across the load ■ Thermally protected ■ Pin compatible with the TFA9843AJ, TFA9843(B)J, TFA9842(B)J, TFA9841J. 3. Applications ■ CRT TV, LCD TV ■ Monitors ■ PC speakers ■ Boom box ■ Mini and micro audio receivers. Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 36 3. Block Diagram Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 37: Pin Description

    4.2 Pin Description Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 38 LA78040/LA78041 (N602) Vertical Deflection Output Circuit 1) Features Low power dissipation due to built-in pump-up circuit Vertical output circuit Thermal protection circuit built in Excellent crossover characteristics DC coupling possible 2) Block Diagram Fig. 13 Block Diagram Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 39 8-pin PDIP, 8-lead JEDEC SOIC, 8-lead MAP and 8-lead TSSOP packages and is accessed via a 2-wire serial interface. In addition, the entire family is available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 5.5V) versions. Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 40 The Write Protect pin allows normal read/write operations when connected to ground (GND). When the Write Protect pin is connected to Vcc, the write protection feature is enabled and operates as shown in table 14. Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 41 AT24C16, 16K SERIAL EEPROM: Internally organized with 128 pages of 16 bytes each, the 16K requires an 11-bit data word address for random word addressing. 6 ) Block Diagram Fig. 16 7) Refer to Table 21 about Functions and Data of the IC’s Pins. Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 42 STR-G5600. Pin configuration, function and threshold of STR-G8600 are compatible with those of STR-G5600. 2) Block Diagram 3) Function of Terminal Table 15 4) Refer to table 22 about Functions and Data of the IC’s Pins Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 43: Service Data Of Key Ics

    SERVICE DATA OF KEY ICs Table 16 Ground Resistance of TMPA8873 Pins Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 44 Table 17 Operating Voltage of TMPA8873(N202)’s Pins Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 45 Table 18 Functions and Service Data TFA9842J’s Pins Table 20 Functions and Service Data LA78040’s Pins Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 46 Table 21 Functions and Service Data of AT24C08 / 16 Pins Table 22 Functions and Service Data of STR-G5653’S Pins Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 47: Appendix

    APPENDIX Model no.:CT-21CBS5CPH.doc version 1.0...

  • Page 49: Replacement Parts List

    AUDION 2SD880-Y 8475700020B LINE FILTER LCL-F16(JUB4.757.002) L801 8475700010B LINE FILTER LCL-F15(JUB4.757.001) L802 8472607070B TRANSFORMER BCK-23519L(JUB4.726.485) T801 50060010190 TRANSFORMER BCK-35-0318 50390070930 CW7805CS N802 50390020140 H11A817A V802 50390020150 HPC922 50700010730 FUSE RES. R/S/V/I50TT2.5AL250V(61802 F801 59818033250 FUSE RES. 61802.5 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 50 CARBON RES. RT13-0.166W-33KΩJ R207 51113224JU0 CARBON RES. RT13-0.166W-220KΩJ R224 51113105JU0 CARBON RES. RT13-0.166W-1MΩJ R226 51113155JT0 CARBON RES. RT13-0.166W-1.5MΩJ R240 50620102300 M. OXIDE FILM RES. RY21-0.5W-270ΩJ R222 5251C220J10 CERAMIC CAP. CC1-63V-06C-C-22PFJ C205 C207 5251C270J10 CERAMIC CAP. CC1-63V-06C-C-27PFJ C203 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 51 84756003200 INDUTANCE HXT39(JU4.756.032) 8475600310B INDUTANCE HFT550A (JUB4.756.031) 8479902470B TRANSFORMER BSC60J2(B) 67138565305 STR-G5653 N603 50390061810 TFA9842AJ/N1 67113780406 LA78040 67113780406 LA78040-E 50650020140 AUDION 3DD5023 50650020060 AUDION TT2140 R902 8782000050G CRT PCB JUG7.820.005 RW02 50620071060 CARBON RES. RT13-0.166W-15ΩJ RW03 Model no.:CT-21CBS5CPH.doc version 1.0...
  • Page 52 ELECTROLYTIC CAP. CD110X-50V-10μFM 67109138025 TSOP1238 67109138025 AT138A RP12A 67109138045 HRM380017 RP12B 8782012990C IR RECEIVE PCB JUC7.820.1299 VDP11A 51113102JU0 CARBON RES. RT13-0.166W-1KΩJ VDP11B VDP11C RP13C 61118003201 L.E.D HFBA032MP-90S3 RP14 The data are subject to change without prior notice. Model no.:CT-21CBS5CPH.doc version 1.0...

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