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JVC CT1421
Service Manual


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

Description of JVC CT1421 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 8 (click to view)
C-T1421

ELECTRICAL ADJUSTMENTS
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. 2-2 appears on the display. 5. Press the channel button (2) on the remote control to select the "R.BIAS". 6. Using the VOL. UP/DOWN button on the remote control, adjust the R.BIAS. 7. Press the CH. UP/DOWN button on the remote control to select the "G.BIAS", "B.BIAS", "R.DRIVE", "G.DRIVE" or "B.DRIVE". 8. Using the VOL. UP/DOWN button on the remote control, adjust the G.BIAS, B.BIAS, R.DRIVE, G.DRIVE or B.DRIVE. 9. Perform the above adjustments 7 and 8 until the white color is looked like a white. 1. 2. R.BIAS 3. G.BIAS 4. B.BIAS 5. R.DRIVE 6. G.DRIVE 7. B.DRIVE 8. AGC AUTO 2-7: 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. 2-3 appears on the display. 4. Press the channel button (1) on the remote control to select "H. PHASE 50/60". 5. Press the VOL. UP/DOWN button on the remote control until the right and left screen size of the vertical line becomes the same. 6. Receive the center cross signal of NTSC. Then perform the above adjustments 2~5. 2-8: VERTICAL LINEARITY NOTE: Adjust after performing adjustments in section 2-7. 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. 2-3 appears on the display. 4. Press the channel button (5) on the remote control to select "V. LIN 50/60". 5. Press the VOL. UP/DOWN 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. Then perform the above adjustments 2~5. 2-9: VERTICAL POSITION NOTE: Adjust after performing adjustments in section 2-8. 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. 2-3 appears on the display. 4. Press the channel button (4) on the remote control to select "V. POSI 50/60". 5. Adjust the VR401 until the horizontal line becomes fit to the notch of the shadow mask. 0. RETURN Fig. 2-2 2-10: VERTICAL SIZE NOTE: Adjust after performing adjustments in section 2-9. 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. 2-3 appears on the display. 4. Press the channel button (3) on the remote control to select "V. SIZE 50/60". 5. Press the VOL. UP/DOWN 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. Then perform the above adjustments 2~6.

1. H. PHASE 50/60 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

Fig. 2-3

8

No.51843

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