Gasboy CFN Series Diagnostic Manual - Manual (Page 283)

CFN System
1310 7-47
Possible Cause Checks Corrective Action
Blown picofuse. Measure the voltage between
the black (DC ground) and
orange (+5 VDC) wires on P2
of the console CPU PCB
(consoles I, IA and II) or
between TP1 (+5 VDC) or
TP2 (gnd) (consoles IA+ and
II+). If +5 VDC is measured at
power supply but not at PCB,
replace power supply
assembly (consoles I, IA, and
II). For consoles IA+ and II+,
replace fuse on CPU PCB.
Defective VF display board or
defective console CPU board. Try VF display self-test. Replace the VF display board
if test fails. Replace the
Console CPU board if VF
display works in self-test.