Sanyo CP21KS2K Service Manual

Also see for CP21KS2K: Instruction manual Instruction manual

-15-Service Mode AdjustmentsFollowing adjustments should be carried out when the memory IC is replaced. How to enter the service mode andadjust values, please refer to “ Entering to Service mode” on page 8.NOTE: Do not attempt this adjustment with weak signal.(1) Tune the receiver to most clearest (or strongest) VHFstation in your area. Set the brightness and contrastcontrols to maximum. Set the colour control tominimum.(2) Select 91 [ Align RF AGC Threshold ] in the service mode.(3) Change value until the snow noise just disappears.(4) Exit from service mode.Item 91 [ALIGN RF AGC THRESHOLD] RF AGC(1) Receive a monochrome circular pattern.(2) Set the brightness and contrast to normal.(3) Select 5 [Align Sync. to Fly Back Phase ] in the servicemode.(4) Change value to be optimum horizontal centre position.(5) Exit from service mode.Item 5 [ALIGN SYNC. TO FLY BACK PHASE H-PHA(1) Receive a monochrome circular pattern..(2) Set the brightness and contrast to maximum.(3) Select 7 [Align Vertical Amplitude ] in the service mode.(4) Change value to be optimum vertical size.(5) Exit from service mode.Item 7 [V-SIZE 50] VERTICAL SIZEHorizontal centreVertical sizec UpperCenterBottomdeabUpperCenterBottom(1) Receive a crosshatch pattern.(2) Select a picture mode of NATURAL by pressing thePICTURE MODE button.(3) Select 19 [Align Vertical S-Correction ] in the servicemode.(4) Adjust Vertical S-letter Correction so that the differenceof “c”, “d” and “e” becomes less than 2 mm by pressingthe VOLUME + or - button.(5) Confirm Vertical Linearity and adjust Vertical Centerthen Vertical Size.(6) Exit from service mode.Item 19 [ALIGN VERTICAL S-CORRECTION] V SC(1) Receive a crosshatch pattern.(2) Select a picture mode of NATURAL by pressing thePICTURE MODE button.(3) Select 17 [Align Vertical Linearity ] in the service mode.(4) Adjust Vertical Linearity so that the difference of “a” and“b” becomes less than 3mm by pressing VOLUME + or- button.(5) Exit from service mode.Item 17 [ALIGN VERTICAL LINEARITY] V LIN