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akira CT-21NI9 Service Manual

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Summary of Contents for akira CT-21NI9

  • Page 2 CHASSIS: 3S10 MODEL: CT-21NI9R Model No: CT-21NI9R Version 1.0...

  • Page 3: Table Of Contents

    CONTENT SPECIFICATIONS ..........................4 X-RAY RADIATION PRECAUTION ....................5 SAFETY PRECAUTION......................... 5 PRODUCT SAFETY NOTICE........................ 5 ALIGNMENT INSTRUCTION....................... 6 CIRCUIT DIAGRAM ..........................13 Model No: CT-21NI9R 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 1. 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 Instruction

    ALIGNMENT INSTRUCTION (3S10) Preface This ADJUST MANUAL is only used for 3S10 chassis, and guides to make adjust equipments. It is only a reference. Instruments For Adjustment TV signal generator 20MHz 2-channel oscilloscope Adjust jigs Sweep Signal Generator(option) Digital voltmeter White balance adjust equipment.
  • Page 7 4-4. Main Power Adjust (B+) Switch on power switch. Measure the voltage with digital voltage meter between two terminals of C615. Adjust VR601 to obtain 110+/-0.5V on the Digital Voltage meter. (The voltage will have a little difference when use difference type of CRT.ORION A51JSW91X50 CRT is 118V;HITACH CRT is 110V) Complete TV General Adjust 5-1.
  • Page 8 5-5. SUB-Brightness Adjust Receive GREY SCALE/COLOR BAR pattern. Enter Service V2.0 mode. Press PROG +/- buttons to select Bright Max. Set a fixed value by VOL+/- buttons (The value will be difference when use difference type of CRT.. ORION A51JSW91X50 CRT is 63).
  • Page 9 DESIGN FOR ST92195 AND SET OPTIONS OPERATING: Use MENU+AV+ANAL key to enter factory mode, OK key to enter Service 2.0 mode and Design mode. Use PP key to exit Factory mode. Use PROG+/- keys to select adjust item, use VOL+/- keys to set data.
  • Page 10 Option 5: (Only used for TVs with teletext) Used to select teletext languages for different area use b0 = enable the remote controller to change Run_Time_Mode_Choice use “MENU” key b1, b2 = “Run_Time_Mode_Choice” ---------- set to 0/2/4/6!! Teletext languages option MCU1 ENGLISH, CYR2_LAT_Twist, SWEDISH, CZECH, ENGLISH, SERBIAN, LETTISH, AR_LAT_Twist...
  • Page 11 Option3: b0---- always set 0 b1--- MCU’s MUTE pin output voltage select. Set to 0 when use TDA1905(MUTE=0V), set to 1 when use TDA7496(MUTE=5V) b2--- always set 0 b3--- usually set 0 b4--- usually set 0 Option4: Only one AV input: b0=1 b2=0 Two AVs input : b0=1 b1=1 When SCART need, b0=1 b3=1 HPOS OSD: OSD left and right position, set to 001...
  • Page 12 Service V2.0 | Desing Tuner AGC | AGC Gain H Position | Option1 V Position | Option2 VAMP 50 | Option3 VAMP 60 | Option4 Bright Max | Option5 Bright Min | ST Ttext Sub Tint | HPOS OSD VCO Coarse | VPOS OSD VCO Fine | HPOS TXT...

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