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TV ALIGNMENT INSTRUCTIONS
ALIGNMENT INSTRUCTIONS— READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
The high voltage shock hazard may be eliminated by removing the horizontal oscillator tube (V16) from its socket.
The plug on the focus and deflection/assembly must be in place to operate the set.
Remove the converter tube (V2) and replace it with a 6J6 which has pin 1 removed. This will disable the local oscillator and prevent erroneous indica-
tions.
SOUND IF ALIGNMENT USING AM SIGNAL GENERATOR AND VTVM
DUMMY
ANTENNA
. 001MFD
. 001MFD
. 001MFD
SIGNAL
GENERATOR
COUPLING
High side to pin 1 (Grid)
of 6AU6 (Vll). Low side
to chassis.
High side to pin 1 (Grid)
of 6AU6 (V10). Low
side to chassis.
SIGNAL
GENERATOR
FREQUENCY
21MC
(Unmod.)
CHANNEL
Any
CONNECT
VTVM
DC Probe thru 1 Meg.
to Point^X Common
:o chassis.
DC Probe to Potnt^J>.
Common to chassis.
DC Probe thru 1 Meg.
to PoinK^. Common
o chassis.
ADJUST
Al
A2
A3
REMARKS
Detune A2 to maximum counter clockwise. Adjust
Al for maximum deflection.
•Adjust for zero reading. A positive and negative
reading will be obtained on either side of the correct
setting.
Adjust for maximum deflection.
SOUND IF ALIGNMENT USING FM SIGNAL GENERATOR AND OSCILLOSCOPE
Use frequency modulated signal with 60 % modulation and 450KC sweep. Use 120 ^ sawtooth voltage in scope for horizontal deflection.
DUMMY
ANTENNA
. 001MFD
. 001MFD
SWEEP
GENERATOR
COUPLING
High side to pin 1 (Grid)
of 6AU6 (V10). Low side
to chassis.
SWEEP
GENERATOR
FREQUENCY
21MC
(450KC
SWP)
MARKER
GENERATOR
FREQUENCY
21MC
CHANNEL
Any
CONNECT
SCOPE
Vert. Amp. to Point
ffi>. Low side to
chassis.
Vert. Amp. to Point
xTJ>. Low side to
chassis.
ADJUST
A1.A3
A2
REMARKS
Adjust for maximum amplitude and
symmetry as per figure 1.
Adjust A2 so 21MC occurs at center of
crossover lines as per figure 2. SLIGHTLY
retouch Al for maximum amplitude and
straightness of crossover lines. Continue
with step 4.
VIDEO IF ALIGNMENT
Connect the negative lead of a 3 volt battery to the junction of R25 and R26, connect the positive lead to chassis.
* NOTE: In later productions, receivers where R40 is 1800S2, R45 is 18KS2 and L26 has been added, the frequencies to which A9 and A10 are tuned
have been reversed. In those receivers, A9 is tuned to 24. 35MC, and A10 is tuned to 22. 5MC.
DUMMY
ANTENNA
Direct
Direct
Direct
Direct
Direct
Direct
Direct
Direct
Direct
SWEEP
GENERATOR
COUPLING
High side to ungrounded
tube shield floating over
dummy converter tube
(V2). Low side to
chassis.
"
"
"
"
SWEEP
GENERATOR
FREQUENCY
Not used
"
"
"
24MC
(10MC SWP)
MARKER
GENERATOR
FREQUENCY
21MC
27MC
19. SMC
» 22. SMC
•24.35MC
21. 75MC
25. SMC
22. SMC
21. 85MC
24.75MC
25. SMC
26.25MC
CHANNEL
Any
"
"
"
CONNECT
SCOPE
Use VTVM
DC Probe to Poinf@>.
Common to chassis.
"
"
€
't. Amp. to Point
Low side to
ssis.
ADJUST
A4, A5
A6.A7
A8
A9
AID
All
A12
A13, A14
REMARKS
Adjust for MINIMUM deflection.
Adjust for maximum deflection. See note
above.
"
Connect 330fi carbon resistors across
R33, R36, R40 and R45. Adjust A13
and A14 for response curve similar to
figure 3. Remove all 330ft resistors.
Check for response curve similar to
figure 4. If necessary retouch A9 thru
A14 for proper response.
FIG. I
FIG.5
FIG.6
RF OSCILLATOR ADJUSTMENTS
PAGE 1O
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