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PRE-ALIGNMENT INSTRUCTIONS
TUNER ALIGNMENT INSTRUCTIONS
The high voltage lead should be securely taped and kept away from the chassis.
Allow a 20 minute warm-up period for the receiver and test equipment.
VHP OSCILLATOR ALIGNMENT
Connect the negative lead of a 1, 5 volt bias supply to point ^> . Positive to chassis.
Connect variable bias to IF AGC line.
Adjust bias to obtain response curve which shows no indication of overloading.
Connect the synchronized sweep voltage from the sweep generator to the horizontal input of the oscilloscope for horizontal deflection.
The Sweep Generator output lead should be terminated with its characteristic impedance, usually 50 ohms.
Use only enough Sweep Generator output to provide a usable pattern on scope.
Use 10MC sweep unless otherwise noted.
Set the Fine Tuning to the center of its range.
DUMMY
ANTENNA
Two UOS1
Carbon
Resistors
SWEEP
GENERATOR
COUPLING
Across antenna termi-
nals with 12012 in each
lead.
SWEEP
GENERATOR
FREQUENCY
213 MC
(10MC Swp)
207MC
(10MC Swp)
201MC
(10MC Swp)
195MC
(10MC Swp)
189MC
(10MC Swp)
183MC
(10MC Swp)
177MC
(10MC ;iwp)
85MC
(10MC Swp)
79MC
(10MC Swp)
69MC
(10MC Swp)
63MC
(10MC Swp)
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. 75MC
67.25MC
71.75MC
61. 2 S M C
65. 75MC
55.25MC
59. 75MC
CHANNEL
13
u
u
10
9
8
7
6
5
4
3
2
CONNECT
SCOPE
Vert. Amp. thru
47K across Video
Detector load.
ADJUST
(U01
A204
A203
A204
A205
A206
A207
A208
A209
A210
A211
A212
REMARKS
Adjust to place sound marker in trap
notch as in Fig. 201. Video marker should
fall at 50%.
VHF RF AND MIXER ALIGNMENT
This portion of the receiver has been properly aligned at the factory and is very stable. Alignment of this portion should not be required in the field.
UHF TUNER
_^________
_
.
—
This protion of the receiver has been properly aligned at the factory and is very stable. Alignment of this portion should not be required in the field.
F I G . 2 0 1
RF TUNER-BOTTOM VIEW
PAGE 6
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