Technics ST-G460 - Page 7

e Adjustment points.
SEPARATION ADJUSTMENT 7 FM SIGNAL GENERATOR CONDITION
. fi Modulation...............cccceceeneees Stereo ‘“‘L’”’ mode or ‘‘R”
1.Test equipment connection is shown in figure. ae oe m
2'Set the unit to “FM” mode. ‘ | Dee een oe | FM STEREO FM DET ~— FM DET
3.Set the radio frequency display and signal generator to pila a eas setae oes 19kHz) SEPARATION FM MPX Coil Coil
100.10MHz. utput OV CN acinar iirasasscteenioe aes ADJ. VCO. ADJ. (100.1|MHz) (100.IMHz)
4.Adjust VR301 so that the R-CH output is minimized when
stereo modulator is in “L”(L-CH modulation) mode. AC EVM VRSOI VRS02 Toe Nol
an Hl
rare ee, eee |
Z20!
®) OO
3
LPF
(fc
=
15
kHz~
19kHz)
noi
™
NA
EG
FM
SIGNAL
GENERATOR
CONDITION
'
4
a
BNEaGHI
CRD
BGK
FM
STEREO
DISTORTION
ADJUSTMENT
,
Ei
onl
&)
{ y) _ Modulation Stereo “L” mode or ‘‘R”’ TP301 :
1.
Test
equipment
connection
is
shown
in
figure.
mode
45%,
Pilot
10%
FJ
—_—
2.Set the unit to “FM” mode. Modulation frequency ea FM STRENGTH
LEVEL ADJ.
3. Set the radio frequency display and signal generator to Output level
100.10 MHz.
4. Adjust L1 so that the distortion factor of L-CH is minimized.
5. Make sure that the distortion factors of L-CH and R-CH are eS an)
nearly the same with each other to minimum. oveees Out
FM ANT —— Qutput
Notes: aed a
1. The adjusting screwdriver used should be made of resin.
2.L1 should be rotated no more 1/4 turn (90 deg.) on either side.
Stereo
modulator
Adjust
bal
+90°
FM SIGNAL STRENGTH LEVEL ADJUSTMENT
1. Test equipment connection is shown in figure. M
se . odulation frequency
2.Set the unit to “FM and IF normal” mode. Output level
ee
frequency
display
and
signal
generator
to
8
TERMINAL
GUIDE
OF
IC’S,
TRANSISTORS
AND
DIODES
4.Change FL display from “frequency” to “dB” by pressing
the FM signal button.
5. Adjust VR101 so that 54dB is indicated. ‘54dB” is
indicated on the FL display.
6. Repeat steps 4, 5.
seeces
000
AN6554F
LM7001 } 16 pin |
MS50941-421SP
| AN7274NS | 3
| AN7472S_—_
2SA1309, 2SC3311
2SD1450,
DTC144ES,
2SA1253R
MA165, MA150FV
1SR35200
Anode
MA4062, MA4082M
MA4140M, MA4051M
MA4300M
Anode
2501310, 2SC3940
Cathode
Cao—_4q——0 A
Cathode
Cac-—fg—o A