Operating instructions
Tahle
5·8.
Trouble;;hooting
,
Frequency.Deviation-l\Ie~
sure
(FDM)
Mode
(Conlinued)
TROUBLE
CHECK
NORMAL
INDICATION
REFER
TO
SIGNAL
LEVEL
light on,
FREQUENCY
meter
r
eads
off
scale.
NOTE
The
preceding
trouble-
shooting
proc
edures
also
apply to
the
Signal G
en-
erator
mode
of
operat
ion .
.
FREQ.-DEV.
MEASURE
Inoperative
in
this
position
only .
No
audio
, SIGNAL
LEVEL
light on. (Nor mal ope r
ation
of FM
Deviation
Meter,
Model
302.)
FREQUE:\CY
m
eter
operative
but FM
DEVIATIO~
meter
on
Model 302
does
not
indicate
or
no
trace
on
Oscilloscop
e,
Model
301.
CARRIER
FREQUE:\CY
SELECTOR
Erratic
FREQCE:\CY
meter
action
in one
or
more
of the
crystal
positions.
NOTE
This
is
also
ch
aracter-
i
stic
of
the
Signal Gen-
erator
mode
of oper atio n.
Output of
-12V
regulator
9.9
MHz
generator.
Q4, Q5
RF
Plug-in
or
Broad-
band
Mixer
.
pin
7.
Local
oscillator
connec-
tor
or
coaxial
relay
cable.
Coaxial
relay
CH-K1
or
Harmonic
Generator
output.
(Li
sten
for
relay
operation
while
switching
function
switch
to
dif-
ferent
positions.)
Sp
eaker
connection.
Audio
amplifier
.
Speaker.
FM
Deviation
Meter
or
Oscilloscope
Q9
Switch
contacts
on
CARRIER FREQUENCY
SELECTOR.
-12V
±O.lV
at
CH-J6-14.
80-100
MVat
CH-Jl-2.
B.
Greater
than
600
MV.
700 MV at
CH-J7
700 MV at
FP-A2-Jl.
Audible
tone
in
FM
position.
1. 0
audio
at
CH-A5-17
output
with
50 MV
input.
3. Of) dc
resi
stance.
3.2
vdc
Power
Supply
board
0100
(Figure
6-2).
Multi-Oscillator
board
0103
(Figure
6-5).
Second
IF
and D
is
-
criminator
bo
ard
0054
(Figure
6-1).
Applicable
instruction
manual.
Figure
5-1.
Figure
5-2,
and
Har-
monic
Generator
board
0102
(Figure
6-4).
Power
Supply
board
0100
(Figure
6-2).
Power
Supply
board
0100
(Figure
6-2).
Right-hand
side
cover.
Applicable
instruction
manual.
Second
IF
and
Dis-
criminator
board
0054
(Figure
6-1).
Figure
5-2
.
5-15
5601"0015"1