JVC 250 - Manual (Page 148)

Chapter 7---Troubleshooting
7-10 Model 250 Service Manual
Video Amplifier PCB LED
Figure 7-8 Video Amplifier PCB LED.
The VA_OK LED on the Video Amplifier PCB is illuminated green when all the
CRT deflection circuits are operating properly (/DEFL_OK), the supply voltages
(±15 V, +6.2 V, and +80 V) are present at the Video Amplifier PCB, and all the
CRT Yoke connectors are properly installed (see Figure 7-15 and Figure 7-16).