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Alignment
indicator
Connect to
V.T.V.M.
AM det.
output tab
AM det.
output tab
Set radio dial to
Adjust for
L109
(OSC coil)
TC-8
(OSC trim.)
145 kHz
{Low end)
310 kHz
(High end)
L106
145 kHz
(ANT coil)
Maximum
TC-7
see
(ANT trim.)
Maximum
FM-{F Alignment
FM 1F sweep gen.
1
Test point TP-1
Alignment
indicator
Connect to
Oscilloscope
Max.
Sweep centered
FM det.
Symmetrical
10.7 MHz
output tab
response.
equal heights
Symmetrical
response.
centered
10.7 MHz
FM det.
output tab
Sweep centered
10.7 MHz
LW-RF Alignment
Step
Set signal to
AM signal gen.
LW 145 kHz
Loop antenna
(Modulated)
310 kHz
(Repeat steps 1 and 2 to obtain frequency range.)
145 kHz
AM det.
{Modulated)
output tab
310 kHz
AM det.
poePentenna
(Modulated)
output tab
a
ae
(Repeat steps 4 and 5 to minimize tracking error, and also step 3 if necessary.)
FM-RF Alignment
ee
Step
pisier seu
Set signa! to
naicator
Set radio dial to
Adjust
Adjust for
FM signal gen.
V.T.V.M.
88 MHz
FM det
L103
.
Antenna terminal
(Modulated!
88 MHz
(OSC coil)
Maximum
;
107 MHz
FM det.
TC-2
(Repeat steps 1 and 2 to obtain frequency range.)
88 MHz
FM det.
L101
:
107 MHz
FM det.
TC-1
i
ae
(Repeat steps 4 and 5 to minimize tracking error, and step 3 if necessary.)
Set radio dial to
Adjust for
IF T7101
Max. Freq.
\ET402
Max. Freq.
IF T401
How to change the upper limit of FM frequency range from 108 MHz to 104 MHz.
Symbol! No.
Description
108 MHz
104 MHz
(Repeat 1 and 2 to obtain a balanced ''S"' curve linearity.)
L103
FM Coil
1-At
87-006-015-01
1-"t
87-006-036-01
C110
Ceramic capacitor
13pF
88-212-130-01
20pF
88-213-200-01
For Service Manuals Contact
MAURITRON TECHNICAL SERVICES
8 Cherry Tree Rd, Chinnor
Oxon OX9 4QY
Tel:- 01844-351694 Fax:- 01844-352554
Email:- enquiries@mauritron.co.uk
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