Vector G08 Series Faq page 24

Symptom: One Or More Colors Is Missing
Check the transistors and diodes on the Input Clamp board for shorts or opens when one or more
colors is missing from the display, and the G-80 boards are known to be good.
connections from the Input Clamp board to the deflection board.
Symptom: Picture Flickers In and Out
This is a difficult problem to solve, as this symptom can be caused my many things:
•
Fluctuating voltages from power supply to the game boardset
•
Bad connections of XY pair with card cage in G-80 game boardset
•
Bad connections of ribbon cables between XY pair in G-80 game boardset
•
Bad connections to HV unit from the deflection board
•
Bad connections at the Input Clamp board (cracked solder joints)
•
Bad connections at the deflection board (cracked solder joints)
I would start by reseating connections in this order: connections to the power supply, to the game
boardset, the XY pair, and the ribbon cable between them. Also, re-solder the pins on the Input
Clamp board and deflection PCB. If that does not fix it, you will need a scope to see where the
signal is getting dropped.
G08 Vector Monitor Guide
Check the
Page 24 of 41