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TOSHIBA 14AR21
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of TOSHIBA 14AR21 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 12 (click to view)
14AR21

à SERVICE ADJUSTMENT
RF AGC Adjustment
1. Receive a good local channel. 2. Enter the service mode signal category and select the service adjustment "AGC". 3. Set the data value to point where no noise or beat appears. 4. Select another channel to confirm that no noise or beat appears.

CHROMA ADJUSTMENT
No. Adjusting point 1 SUB-TINT (I2C BUS CONTROL) Adjusting procedure/conditions 1. Receive the "Colour Bar" signal through AV in. 2. Connect the oscilloscope to TP853 (Pin (5) of P882) BLUE-OUT. » Range : 100mV/div. (AC)(Use Probe 10:1) » Sweep time : 10 µsec/div. 3. Call the "SUB-TINT" mode in service mode. Adjust the "SUB-TINT" bus data to obtain the waveform shown as Fig 1. 4. "SUB-TINT" bus data decrease 4 steps to get final waveform. (Fig 2.) 5. Clear the SERVICE mode. Waveform and others
WAVEFORM 1
SAME LEVEL

FINAL WAVEFORM

W Y CY G MG R B

Fig 1

Fig 2

HORIZONTAL AND VERTICAL DEFLECTION LOOP ADJUSTMENT
No. Adjusting point 1 V-SLOPE(I2C BUS CONTROL) Adjusting procedure/conditions 1. Receive Monoscope Pattern Signal. 2. Call the "V-LIN" mode. 3. Increase or decrease "V-LIN" by Volume key till the horizontal line in the center of monoscope is just at the position where the blanking starts. Waveform and others

2

V-CENTER (I2C 1. Call the "V-CENT" mode. BUS CONTROL) 2. Increase or decrease "V-CENT" by Volume key till the picture is centered. 1. Call the "V-AMP" mode. 2. Increase or decrease "V - AMP" by Volume key to set overscan of 10.0% typical. Adjustment Spec 10.0% range ±1%. FIXED DATA, NO NEED TO ADJUST.

3

V - AMP (I2C BUS CONTROL)

4

S-CORRECTION (I2C BUS CONTROL) H - CENTER

5

1. Call the "H-CENT" mode. 2. Increase or decrease "H-CENT" by Volume key to center the picture horizontal. 1. Receive the "Monoscope Pattern" signal. 2. Press R/C to set Picture NORMAL condition. 3. Adjust the focus control to get the best focus.

6

Focus adjustment

11

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