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•FM RF ALIGNMENT
•FM STEREO ALIGNMENT
----_
......
'-'-
nl
B;5
~
PILOT
76
kHz
VR2
eI
DC
BALANCE
FM
2nd
IO.7MHz
---.
T3
o
Azimuth
Screw
o
Fig. 20
CJ
AM ANT
550kHz
L304
•ALIGNMENT POINT ·Please refer to Circ·uit Board fortest points locaton.
FM SIGNALGENERATOR FREQUENCY DC
BAND DISPLAY VOLTMETER ADJUSTMENT REMARKS
..
_CONNECTIONS FREQUENCY SETTING
Disconnect No signal 87.5MHz
V·.·(+)
L5 Adjustfor
1.2±0.05
V
applied
V··(-)
(FMOSCCoil)
readig onDC voltmeter.
FM Disconnect Nosignal 108 MHz V...
(+)
CT3 Adjustfor
8±0.1
V
applied
V···(-)
(FMOSC Trimmer) reading on DC voltmeter.
Repeatsteps (1) and (2).
FM SIGNALGENERATOR FREQUENCY AC
BAND DISPLAY VOLTMETER ADJUSTMENT REMARKS
CONNECTIONS FREQUENCY SETTING
Antennasocket 89 MHz
...
(+)
L1 (FM ANTCoil) Adjust for maximum
(FMRFDummy
(400 Hz
30%)
89 MHz V
..
(-) L4 (FM ANTCoil) reading on AC voltmeter
Fig. 19)
FM "107MHz 107 MHz T..
(+)
CT1
(FMANT
"
Trimmer)
-(400 Hz
30%)
v··(-)
CT2 (FM ANT
Timmer)
Repeatsteps 4and
5.
FM SIGNAL GENERATOR FREQUENCY DC
BAND DISPLAY VOLTMETER ADJUSTMENT REMARKS
CONNECTIONS FREQUENCY SETTING (center
"0")
Antennascoket 89 MHz
V·
..
·(+)
T3
AdjustT3 for
-0.05~0.05
V
FM (400Hz,
30%
89 MHz V
..
··(-) (FM
1FT)
reading on DCvoltmeter.
Mod. 60dB)
.
Notes:
1.
Stereo modulator
................
-Connect
stereomodulator output to EXT MOD terminal of signal generator.
-Pilot
signal modulationto
"10%"
.
2. FM signal generator .. . . . . . . . . . . - Frequency approximately 100 MHz/Output level to
"60~
70dB", 1
~3
mY.
-Modulationmode to
"FM".
CIRCUIT SIGNAL FREQUENCY AC ADJUSTMENT REMARKS
GENRATOR COUNTER VOLTMETER
High sidethru.
PILOT 89 MHz 100kO to test
--
VR2 Adjustfor 76.00
kHz±50
Hzreadign on
(0% Mod. 80dB) pointVNegative I(Pilot) frequency counter.
sidetoV
89 MHz Makeadjustment so that when the antenna
SEPARATION (400 Hz. 30% Mod. f
..
LCh
(+)
VR1
inputis sUbjected to LmodUlation (or R
...Rch
(+)
80dB) ...
(-)
(Separation) modulation.) Rchannel output(or L
channel output) becomes minimum.
•AZIMUTH ALIGNMENT
TAPE AC AC ADJUSTMENT REMARKS
VOLTMETERG) VOLTMETER@
Playbackthe azimuth tape. Across headset Across headset
V··Lch
(+)
Adjustfor same reading on AC
V..Rch
(+)
voltmeterCD and @.
v··(-)
(6)
L-_---L
_
•DC BALANCE NB ALIGNMENT
(2)
(1)
(3)
(5)
(4)
II1ARKS
.2±0.05V
Cvoltmeter
.8±0.1 v
DC
voltmeter
II1ARKS
laximum
~r
"
JlARKS
laximum
~
rmaximum
mon
ope.
'ig. 16)
laximum
laximum
'ig. 17) Fig.
21
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lID