Vector G08 Series Faq page 20

It is difficult to determine if it is the custom chip that is causing a problem. Here is a listing of the
pins of the custom chip on the deflection board:
Pin 1 wiper of height pot. Other inputs to pot are Y analog signal and Y yoke output
Pin 2 Output that drives X deflection circuit
Pin 3 wiper of horizontal center. Other inputs to pot are -9.1VDC and +9.1VDC
Pin 4 GND
Pin 5 Connected to width pot. Wiper is connected to X yoke output, and other input is NC
Pin 6 +9.1VDC
Pin 7 hooked to pin 10 via 12pf capacitor. According to manual, output should be 7.5VDC
Pin 8 NC
Pin 9 hooked to GND via 1K resistor
Pin 10 Y analog input
Pin 11 Y analog input
Pin 12 -9.1VDC
Pin 13 connected to pin 14 via 22k resistor
Pin 14 X analog input
Pin 15 connected to pin 14 via 22k resistor (same as pin 13)
Pin 16 Y input; hooked to pin 10 via 22pf capacitor and 30k resistor in parallel
Pin 17 wiper for vertical center; Other inputs to pot are -9.1VDC and +9.1VDC
Pin 18 output that drives Y circuit
If you are getting bad readings at the yoke output, check pins 2 and 18; they should also be varying
in values. If one or the other is stuck, check to see that the X and Y inputs to the monitor are
reaching the chip (pins 14 and 10). If the X and Y analog inputs look good but the outputs of the
chip still look bad, most likely this chip is bad, and the only solution to date is finding another good
one. If the outputs look good, then you can narrow it down to devices in the deflection circuit.
If there is something wrong, determine which circuit and thus which parts are in question. Check
voltages on the deflection board and look at the schematics. If the output to the yoke is +62V, then
a transistor that controls the +62V is probably in question. So forth for the –62V.
If everything looks good, power down the monitor, hook up the yoke, and power up the monitor.
G08 Vector Monitor Guide
Page 20 of 41