GE Photofact Folder 21C115 Disassembly Instructions Manual page 10

ALIGNMENT INSTRUCTIONS (cont)
OSCILLATOR ADJUSTMENT
Leave bias connected as under Video IF alignment
Connect the synchronized sweep voltage Irom the sweep generator to the horizontal input of the oscilloscope lor horizontal deflection.
The sweep generator output lead should be terminated with its characteristic impedance, usually 50 ohms.
Set the fine tuning control to the mid-position of its range.
DUMMY
ANTENNA
Two 1200
Carbon
Resistors
SWEEP
GENERATOR
COUPLING
Across antenna ter-
minals with 12013 in
each lead.
SWEEP
GENERATOR
FREQUENCY
213MC
(10MC Swp)
207MC
(10MC Swp)
201MC
(10MC Swp)
195MC
flOMC
Swp)
189MC
OOMC Swp)
183MC
(10MC SWD)
177MC
(10MC Swp)
85MC
(10MC Swp)
79MC
(10MC Swp)
69MC
ilOMC Swp)
63MC
(lOMCSwp)
57MC
(10MC Swp)
MARKER
GENERATOR
FREQUENCY
211.25MC
215.75MC
205.25MC
209.75MC
199.25MC
203.75MC
193.25MC
197.75MC
187.25MC
191.75MC
181.25MC
185.75MC
175.25MC
179.75MC
83.25MC
87.75MC
77.25MC
81. 7 SMC
67.25MC
71.75MC
61.25MC
65.75MC
55.25MC
59.75MC
CHANNEL
13
12
11
10
9
8
7
6
5
4
3
2
CONNECT
SCOPE
Vert. Amp. thru
10KS2 resistor to
point GO . Low side
to chassis.
ADJUST
A13
AM
REMARKS
Adjust to place sound marker in the trap
notch as in Fig. 5.
RF AND MIXER ALIGNMENT
The RF and mixer portion of this receiver has been properly aligned at the factory and is very stable. Alignment of this portion should not
be attempted in the field.
o
o
n m
^ ?o
w >
•« i—
W m
P
R
KJ
FIG.4
F IG.5
PAGE 7