JVC 250 service manual Scan Reversal PCB - Outputs

Chapter 5---Electronics

Y_RGB_YOKE (neg.) - bottom of red, green, and blue y-axis convergence yokes.

RGB_LOCK (neg.) - interlock for red, green, and blue deflection yokes (5 V when closed or 0 V when open).

Scan Reversal PCB - Outputs

H_LOCK (neg.) - Horizontal Interlock for the yoke connectors to the Horizontal Vertical Deflection PCB (about 5 V when closed, 15 V when open).

FRONT/REAR - front or rear projection status line to Horizontal Vertical Deflection PCB (front = low, rear = high).

FLOOR/CEIL - floor or ceiling status line to the Horizontal Vertical Deflection PCB (floor = low, ceiling = high).

DEFL_OK - deflection status line from the Horizontal Vertical Deflection PCB (high (about 2 V) = good, low = no scan).

X_RGB(neg) - current feedback signals of the red, green, and blue Horizontal Convergence Amplifier for the x-axis to the Convergence Deflection PCB.

Y_RGB (neg.) - current feedback signals of the red, green, and blue Horizontal Convergence Amplifier for the y-axis to the Convergence Deflection PCB.

To Yokes

H_RGB_YOKE (pos.) - top of red, green, and blue horizontal deflection yokes.

V_RGB_YOKE (pos.) - top of red, green, and blue vertical deflection yokes.

RGB_LOCK (pos.) - interlock for red, green, and blue yokes (5 V when closed or 15 V when open).

X_RGB_YOKE (pos.) - top of red, green, and blue x-axis convergence yokes.

Y_RGB_YOKE (pos.) - top of red, green, and blue y-axis convergence yokes.

Model 250 Service Manual 5-35