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AIWA VXT149
Service Manual


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

Description of AIWA VXT149 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.

The manual is available in languages: English

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Text excerpt from page 27 (click to view)
ELECTRICAL ADJUSTMENTS
(TV SECTION)
2-4: CONSTANT VOLTAGE 1. Connect the digital voltmeter to TP401. 2. Set condition is AV MODE without signal. 3. Adjust the VR502 until the DC voltage is 135 ± 0.5V. 2-5: CUT OFF 1. Place the set with Aging Test for more than 15 minutes. 2. Set condition is AV MODE without signal. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (5) on the remote control to select "OTHERS". The Fig. 2-2 appears on the display. 5. Press the channel button (5) on the remote control to select "CUT OFF". 6. Adjust the Screen Volume until a dim raster is obtained. 2-6: WHITE BALANCE NOTE: Adjust after performing CUT OFF adjustment. 1. Place the set with Aging Test for more than 15 minutes. 2. Receive the white 100% signal from the Pattern Generator. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (2) on the remote control to select "AKB". The Fig. 2-3 appears on the display. Press the channel button (2) on the remote control to select the "R.BIAS". Using the PLAY or STOP button on the remote control, adjust the R.BIAS. Press the CH. UP/DOWN button on the remote control to select the "G.BIAS", "B.BIAS", "R.DRIVE", "G.DRIVE" or "B.DRIVE". Using the PLAY or STOP button on the remote control, adjust the G.BIAS, B.BIAS, R.DRIVE, G.DRIVE or B.DRIVE. Perform the above adjustments 7 and 8 until the white color is looked like a white. 1. AKB AUTO 2. R.BIAS 3. G.BIAS 4. B.BIAS 5. R.DRIVE 6. G.DRIVE 7. B.DRIVE 8. AGC AUTO 2-8: HORIZONTAL PHASE 1. Receive the center cross signal from the Pattern Generator. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control to select "H/V". The Fig. 2-4 appears on the display. 4. Press the channel button (1) on the remote control to select "H. PHASE". 5. Press the PLAY or STOP button on the remote control until the vertical line becomes fit to the notch of the shadow mask. 1. H. PHASE 2. H. BLK 3. V. SIZE 50/60 4. V. POSI 50/60 5. V. LIN 50/60 6. V. SC 50/60 7. V. COMP 8. (H FREQ)

0. RETURN

"The adjustment item 8 is not used for this model." Fig. 2-4 2-9: VERTICAL SIZE NOTE: Adjust after performing adjustments in section 2-8. 1. Receive the cross hatch signal from the Pattern Generator. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control to select "H/V". The Fig. 2-4 appears on the display. 4. Press the channel button (3) on the remote control to select "V. SIZE 50/60". 5. Press the PLAY or STOP button on the remote control until the rectangle on the center of the screen becomes square. 6. Receive a broadcast and check if the picture is normal. 7. Receive the cross hatch signal of NTSC. (Audio Video Input) 8. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~5. 2-10: VERTICAL LINEARITY NOTE: Adjust after performing adjustments in section 2-9.

5. 6. 7.

8.

9.

0. RETURN

"The adjustment items 1 and 8 are not used for this model." Fig. 2-3 2-7: FOCUS 1. Receive a broadcast. 2. Turn the Focus Volume fully counterclockwise once. 3. Adjust the Focus Volume until picture is distinct.

1. Receive the cross hatch signal from the Pattern Generator. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control to select "H/V". The Fig. 2-4 appears on the display. 4. Press the channel button (5) on the remote control to select "V. LIN 50/60". 5. Press the PLAY or STOP button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes minimum. 6. Receive the cross hatch signal of NTSC. (Audio Video Input) 7. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~5.

D2-2

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