B+ Voltage Adjustment Method; Screen Voltage Adjustment Method; High Voltage Adjustment Method; Contrast Adjustment Method - Kortek KTN-2001 Service Manual

KORTEK Corporation
6-10 KTN-2001 (1401) Adjustment Method
*Notes
- (1401) : Only different parts of 14"specification are expressly indicated.

1. B+ voltage adjustment method

1) Measuring terminal: D403 cathode side
2) Adjusting V/R: VR401
3) Adjusting voltage: 107±0.3V (110±0.5V) - Option
4) Measuring condition: AC 120V, 60 Hz, cross hatch pattern
5) Other voltage: 6.2±0.1V

2. Screen voltage adjustment method

1) Measuring terminal:
2) Adjusting V/R: F.B.T. screen VR
3) Adjusting voltage: to adjust so that Back Raster is 0.1 F/L
4) Measuring condition: cross hatch pattern

3. High voltage adjustment method

1) Measuring terminal: CRT anode
2) Adjusting V/R: 24KV±300V
3) Measuring condition: cross hatch pattern

4. Contrast adjustment method

1) Measuring terminal: center of screen
2) Adjusting V/R: VR702
3) Measuring condition:
- Screen voltage: 500±5V
- Video input voltage: 0.7V
- Screen brightness: To adjust into max 70F/L
4) Adjusting method:
- To supply WINDOW pattern by operation of signal source
- To adjust brightness into 70F/L by changing of V/R702 from Max to Min
KTN-2001/1401
149±0.5V (134±0.5V)
Screen size: at full scan (horizontal frequency: 15.75 KHz)
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