Advertisement
ADJUSTMENTS
1. Power-on the unit, and allow the power-on selftest to finish.
2. Install a jumper between
the TEST
VCO
test point and GND. This enables the FDC
Adjust
Mode.
SPEER
00000
pocoda
Ñ o
| nF:
PaBEHERBEBAEARE
cereale
cqoooooo00do0
an
cay.
po00000
a
la
pa
o
CA
y
pgpooooo000
O00000
poaa
ooon!
OODOD00"
vi
poog
e
ia
s A
|
o
[a[n nja{alan ajelu minin mimin nini
aooo
ggopcopoooaonooonog
pgpoooonpog
O
d
pa
ii
j
I
0008000000
su
aboooo000
Qgpcooo
ooodoco!
SERE peogaggaocaa
ae
eee [|
sisse
la
alle
po000000
al sl ee
ere
pe
asian
Lolo —
Roo $ WER
gron Jia E de a
Paot
poe
ooo
000000
00000
ad0od00s.
000000. TT
ee oooaoa't
se
| ome
pygooo
maa
O
eas
e] ajo]
a
pod00
pene
DOGO
0000!
y
Jn:
(et aa) ee
ae ope mae al
mee
O
Sena
DO0D0 000000000000
Ci
alaa] el
ae
a
000000.
„mr.
O00000
t
]
ft
53
aga
000000 a
Dodo
grano
GND
TEST
É Së
GND
TEST VCO
Figure 7-1.
Controller PCA.
3. After a 2-minute warmup, attach the frequency counter test leads to the VCO testpoint. The
frequency
should be 500 KHz
+5%. If adjustment is necessary, adjust the variable capacitor
C26 for a frequency of 500 KHz
£0.2% (+-1000 Hz).
4. Remove the jumper from the TEST VCO test point.
5. Recycle power and observe the selftest results.
7-2
Advertisement
