User manual SONY HDVF-20A

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Manual abstract: user guide SONY HDVF-20A

Detailed instructions for use are in the User's Guide.

 [. . . ] HD ELECTRONIC VIEWFINDER

HDVF-20A

MAINTENANCE MANUAL 1st Edition Serial No. WARNING
This manual is intended for qualified service personnel only. To reduce the risk of electric shock,  fire or injury,  do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. Refer all servicing to qualified service personnel. 

! [. . . ] Therefore,  repeat these adjustments until all specifications are satisfied. Shoot the resolution chart so that the chart frame is aligned with the underscanned monitor frame with the zoom control. Adjustment points : 1RV112/DF-58 1RV106/DF-58 1Centering magnet Specification : Adjust 1RV112 and 1RV106 so that the chart frame position within the CRT frame is as shown below. Turn the centering magnet only when centering the chart. 

About 3 mm *1

About 1 mm*1 CRT frame Chart frame
*1

: Measure on the CRT surface

(Viewfinder screen) . Adjust the iris of the lens so that the output level (Y level) at TEST OUT connector on the camera is 500 ± 50 mV. PEAKING control : Fully counterclockwise 3 Adjustment Procedures 1. Vertical Linearity Adjustment Adjustment point : 1RV108/DF-58 Specification : Minimize the distortion of the four circles at the corners of the resolution chart. 

3. Press the portion A to the lower chassis as shown below to recreate the same situation as when the upper chassis is installed to the viewfinder,  and confirm that the picture is positioned in the center of the viewfinder. 

Centerring magnet

A

2-6 (E)

HDVF-20A

2-9. Bright Extent Adjustment
Subject : Note This bright extent adjustment,  "2-7. Picture Frame Adjustment" affect each other. Therefore,  repeat these adjustments until all specifications are satisfied. Shoot the resolution chart so that the chart frame is aligned with the underscanned monitor frame with the zoom control. 
CN101

Resolution chart

CN102 RV120

RV119 RV107 RV106 RV112 RV108 RV101 RV121 RV123 RV113 RV114 RV102 RV111 RV109 RV105 RV118 RV117 RV104 RV103 RV115 RV122 RV110

(Viewfinder screen) . Adjust the iris of the lens so that the output level (Y level) at TEST OUT connector on the camera is 500 ± 50 mV. BRIGHT control : Fully counterclockwise 3 . CONTRAST control : Fully counterclockwise 3 . PEAKING control : Fully counterclockwise 3 Adjustment Procedure Switch the format to 60i,  50i and 48i by the camera and adjust the following RVs corresponding to each format. 
RV-204

RV116

DF-58 - component side -

RV-203

Adjustment point :

Specification :

1RV205/VR-266 (60i) 1RV207/VR-266 (50i) 1RV208/VR-266 (48i) The central circle of the resolution chart shall be barely discriminated. 
RV-201

RV-202 RV-207 RV-206 RV-205 RV-208

VR-266 - component side HDVF-20A

2-7 (E)

2-10. Horizontal Picture Positioning Adjustment

2-10. Horizontal Picture Positioning Adjustment
Subject : Resolution chart

Preparations . Shoot the resolution chart so that the chart frame is aligned with the underscanned monitor frame with the zoom control. 

CN102 RV120

RV119 RV107 RV106 RV112 RV108 RV101 RV121

(Viewfinder screen)

CN101

RV123 RV113 RV114

RV122 RV110 RV109 RV105 RV118 RV117 RV104 RV103 RV115

. Adjust the iris of the lens so that the output level (Y level) at TEST OUT connector on the camera is 500 ± 50 mV. CONTRAST control : Fully counterclockwise 3 . PEAKING control : Fully counterclockwise 3 Adjustment Procedure Switch the format to 60i,  50i and 48i by the camera and adjust the following RVs corresponding to each format. Adjustment point : 1RV101/DF-58 (60i) 1RV121/DF-58 (50i) 1RV122/DF-58 (48i) Adjust the position of the resolution chart for A = B

RV102 RV111

RV116

DF-58 - component side -

Specification :

RV-203 RV-204

RV-201

A

B Underscanned monitor frame (raster)
RV-206

Chart frame

RV-202 RV-207 RV-205 RV-208

VR-266 - component side -

2-8 (E)

HDVF-20A

2-11.  [. . . ] MC74HC4538N TC74HC4538AFS-EL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MC74HC4538N TC74HC4538AFT(EL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MC74HC4538N TC7S08FU(TE85R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TC7S08F TC7S32FU(TE85R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  [. . . ]

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