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akira CT-21DR9 Service Manual

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Summary of Contents for akira CT-21DR9

  • Page 2 CHASSIS: SS1 MODEL: CT-21DR9A CT-21DR9CP CT-21DR9CP(SKD) CT-21DR9R CT-21DR9R(SKD) Model No: CT-21DR9A_21DR9CP_21DR9CP(SKD)_21DR9R_21DR9R(SKD) Version 1.0...

  • Page 3: Table Of Contents

    CONTENTS Specifications ............……………………………. ….. 4 X-Ray Radiation Precaution ……………………………………………………….. 5 Safety Precaution …………………………………………………………………… 5 Product Safety Notice ………………………………………………………………. 5 Alignment Instructions ……………………………………………………….………6 Schematic Diagram …………………………………………………………………. 11 Model No: CT-21DR9A_21DR9CP_21DR9CP(SKD)_21DR9R_21DR9R(SKD) Version 1.0...

  • Page 4: Specifications

    SPECIFICATIONS RECEIVING SYSTEM Sound System : A = BG/DK/I/M, R, N = BG/DK/I, CP = BG Colour System : A = PAL/SECAM/NTSC/NTSC P/B R, N = PAL/SECAM/NTSC P/B CP = PAL/NTSC P/B Picture Tube : 54 cm (21”) diagonal Ext. Antenna : 75 Ohm Coaxial Cable Ext.

  • Page 5: X-Ray Radiation Precaution

    CAUTION Before serving the chassis, read the “X-Ray Radiation Precaution”, “Safety Precaution” and “Product Safety Notice” on this page. X-RAY RADIATION PRECAUTION Excessive high voltage can produce potentially hazardous X-Ray Radiation. To avoid such hazards, the high voltage must not be above the specified limit. The normal value of the high voltage of this receiver is 24KV at zero beam current (minimum brightness) under 220V AC power source.

  • Page 6: Alignment Instructions

    ALIGNMENT INSTRUCTION (A) MAIN CHASSIS ALIGNMENT INSTRUCTION Equipment requirement:- 1.1 Colour Television signal generator or Central TV signal generator 1.2 IF alignment – Philips Gen. 5418 or 5518 1.3 Scope 20 MHz – 2 channels types 1.4 Digital multi-meter with LED display 4 digits 1.5 Factory mode remote control unit Channels setting required:- Channel -1...
  • Page 7 B+ Voltage Alignment:- 4.1 Set and connected all the points. 4.2 Locate the RP551 alignment VR location. 4.3 Use digital multi-meter to measure the B+ voltage. 4.4 Switch on the TV chassis and connect by Philips pattern for alignment. 4.5 Align the Rp551 VR with the digital multi-meter to the required spec voltage110 Volt +/- 0.5V,(14”&21”) and 129.5Volt +/- 0.5V (25”/29”/34”).
  • Page 8 10.10 Use strong and weak signal to check the colour picture condition. After adjust the signal level to 35-40 dB and the colour should not gone. The picture and sound must be OK. At 60 dB the picture should not have snow noise. 10.11 Ensure the factory mode setting are set.
  • Page 9 Setting of company logo: 2.1. Switch on the TV set and set the TV in AV mode, Press Remote control “DISP” key and the TV screen will display “AV” and follow by presetting the Numeric key “6”, “4”, “8”, “3” to enter the company logo setting.
  • Page 10 Table 2 Selection OSD Display Setting Description 14” 14”/21” 25”/29” 34” Reading Items limit BLK…STR.DET Black strick detect AFT.GAIN AFT improvement V.SETUP Vertical set-up CD.MODE VOS standards GRAY MOD Internal gray mode set 0:100%, 0:50% B.GAM.DEF Blue Gam selection RG.GAM.SEF Blue Gam adjustment BRIGHT ABL.TH ABL setting, 0-start, 7-late...