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TROUBLESHOOTING
Controller Electronics and Power Supply Assembly
Figure 4-1 represents the power supply and controller electronics of the printed circuit assembly.
Along with key components, the test points are also labeled.
Sa
Sig
8
©
©
.
92
Me
TRIO +5Y
+5]
Hees
Of
9 +12v
i"
«
Lens
QO]
TPB +¥C
(48 VOLTS CONSTANT)
Eg ofa Ea
110
u1s
PIA
wPW
VCO
U4 PROC
|
[4] ®
Utd
FDC
1]
[U2 Rav |
me
P—iL
oy
JA
=
wT
gop. ERE TREE EET
lo
e 3%
000
000 @
ALL JUMPERS ARE SHOWN IN NORMAL OPERATING POSITION.
FIGURE 4-1
FIGURE 4-2
4-2
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