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Test Equipment Connections*
GENERAL . . . . . . . . . . . . . . . . Set channel selector to the highest
unused channel.
Instruction (Page 6)
AC
Connect.
power plug through the isolation trans-
former to power supply.
Calibrate for a two inch equal OSV P-P
display.
Before attempting this alignment, check the PIF response and realign if necessary. Make sure that the signal appearing at the
output of the video detector has an amplitude of 1V P-P.
STEP
ADJUSTMENT
Readjust Marker Generator for visible 36,875MHz marker, if necessary, without distorting the response cuIye.
1
2
Move the core of T201 to its bottom end of range.
3
4
AFT Discriminator
APT Transformer
6
Repeat Steps 3 through 5 so that the final response curve matches Response Curve, "B".
When property aligned maximum allowable amplitude ratio above and below zero reference is approximately A=B.
7
(See Response Curve "B").
Check all channels for same response, if response is not the same, adjust T208, T209 for each charmeL
With the tuner set to an outside signal, observe whether or not the AFT locks in a black and white station and a colour station.
If AFT is found to lock in B/W but not colour, perform the Burst Alignment. If AFT does not B/W or colour, repeat this
8
Note:
AFT alignment.
RF AFT ALIGNMENT
Refer to Figure 9 .
Read the General Alignment
ALIGNMENT PROCEDURE
SWEEP
M A R K E R
GENERATOR
GENERATOR
I
Note:
Set base line in centre of CRT for reference.
SWEEP GENERATOR . . . . . . . Connect the IF video output
through the Output Pad
V
for a 1
P-P output.
MARKER GENERATOR . . . Adjust to produce 36.875
MHz couple loosely to Sweep Generator output cable
to provide marker.
COMPONENT
Adjust T208 to obtain the maximum amplitude
and response cuve "A" as shown in Figure 8.
Adjust T209 to bring 36.875MHz marker to the
Adjust T208 to make the S curve symmetrical
as shown in Figure 8.
Figure 8.
A
or B. (Figure 5 ) Set
PROCEDURE
Response Curve "B"
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Troubleshooting
