tJ
PC
-
V77
A/B/E/G/
UN
.....
Band Select
Switch
Position
13
14
15
SW
16
17
(A/U Version)
Sort
of
Antenna
to
be
attached
to
SSG
Dummy
Antenna
Frequency
of
SSG Preset
Memory
No. Aligning
Position
17.9MHz
M5
L6
Turn L6 until
the
voltage
of
TP9 becomes 4.
4±0.02
V.
6 MHz
to
be received 6
MHz
L4
17
MHz
to
be received 1
7 MHz
TC
-4
18
Adjust
the above aligning position (L4 & TP-4) repeatedly so
that
the tuner can be obtained
the
best sensitivity.
Item
Description
4.
FM
RF
ALIGNMENT
4-1 Conditions
of
the
receiver.
(1)
Power
source: Same
as
mentioned in
item
1-1.
(2) Function
switch
position: RADIO
(3) 8and select
switch:
FM
(4) Volume
control:
50
mW
(5) S
EA
control: Center position
(6) Variable capacitor: Refer the
following
list
shown
in item 4-3.
4-2
Condition
of
FM SSG.
(1
) Modulation: Refer the basic
condition
(2) Frequency: Refer the
following
list
shown
in
item
4-3.
(3)
Output
level
of
the
attenuator
in FM
SSG: The level shall
be
decided by
the
load resistance
of
the
receiver mentioned in
the
basic conditions.
4-3 Connection
of
sweeper
and
the
receiver.
(1
) Tuner
input
Positive side
to
TP
1.
Negative side
to
TP2.
(2) Tuner
output
Positive side
to
4-4
Alignment:
Band Select
Sort
of
Antenna
to
be Frequency
of
SSG Aligning
Switch
Position
attached
to
SSG Preset
Memory
No. Position
1
108
MHz
M5
L1
2
FM
Dummy
Adjust
L1 until
the
voltage
of
TP9 becomes
4.4±0.05
V.
3
Antenna
4
88
MHz
to
be received
90
MHz
(M2) L2
5
108
MHz
to
be received
108
MHz (M4)
TC
-2
6 Adjust the above aligning position (L2 &
TC
-2) repeatedly so that
the tuner can
be
obtained the best sensitivity.
Adjustments
after
AM
oscillation circuit replacement
Initial setting
• Set L5
to
VOM7U02
-
402.
(Seal
is
402
.)
• Position
TC
5 (trimmer) in
the
center.
1) Do tracking adjustment
of
L3
and TC3.
2) Measure the maximum sensitivity for every
100
kHz from
600
kHz (or
603
kHz)
to
1000
kHz (or
999
kHz). Then
do the following:
a)
If better than the threshold value (52
dB
/
m)
of
the max-
imum sensitivity at each frequency,
it
is
okay.
b)
If
it
becomes worse than the threshold value at around
700
kHz
to
800
kHz, set
TC
5
to
MAX
and readjust the
RF
tracking.
c)
If
it
becomes worse than the threshold value at around
900
kHz
to
1000
kHz, set
TC5
to
MIN and readjust
the
RF
tracking.
10
(No.
1740)
Reference OSC circuit parts
06
KV
1250
C25
OFS
41HJ
-391
TC5
OAT
3720
-
600M
L5
VOM7002
-401
IC2
LA1810
C260CT3OCH
-5R6Y
03
2SC2839(E) (Except for C/J version.)
