Advertisement
ALIGNMENT
INSTRUCTIONS
2. FM-STEREO ALIGNMENT (Refer to Fig. 10)
FREQUENCY & DISTANCE ON DIAL SCAL
|
SCA FILTER ALIGNMENT
PL?
TABLE
To accurately align the proper frequencies to the dial scale,
EQUIPMENT CONNECTION
Bene
put
AF OSCILLATOR COUPLING
OSCILLOSCOPE
'i
|
550 kHz
y
67 kHz
Connect vert. amp. of scope to point
|
y
Connect to EXT. FM signal
t
TP301.
1500 kHz
159.9mm
6%
reg
ves
terminal.
Common to chassis.
S9QOMHz
22:8
1. AM/FM-iF
& RF ALIGNMENT
sel
Kr"
AM-IF & RF ALIGNMENT
(Refer to Fig. 10 and 11)
seal
9 A"
CH9
|
SIGNAL
SIGNAL
GENERATOR
GENERATOR
INDICATOR
ADJUST
REMARKS
COUPLING
FREQUENCY
SETTING
Fashion loop of several turns
Point of noninter-
Output meter across
ingly, using the ''Start Point''
mark on the dial scale as a
3
z
Adjust for minimum
oscilloscope
L301 (67kHz Filter Coil)
pattern.
reference point.
19kHz AMP. and LIGHTING LEVEL ALIGNMENT
EQUIPMENT CONNECTION
|
:
ADJUST
REMARKS. 0x
SIGNAL GENERATOR
OSCILLOSCOPE
=
Connect to EXT. FM antenna terminal
Connect vert Amp. of scope to point
L301 (19kHz Pick-up Coil)
Adjust L301, L303 for maximum
through Dummy antenna.
TP302 Common to chassis.
L303 (38kHz Coil)
oscilloscope pattern of 38 kHz.
€
w i
adalat
455 kHz
EXT Soeaker
Jack
Adjust for maximum
134 CH35
of wire an
ts iate signal into
(400 Hz Mod.)
erence.
peaker
Jac
ataut
loop of receiver.
(on/about 600 kHz)
(L).
|
ALIGNMENT CIRCUIT
ADJUSTMENT
REMARKS
550 kHz
Adjust for maximum
L202 (OSC Coil)
ee
550 kHz
output by sliding
coil(L801)
ee
|
(400 Hz Mod)
Leo1 (ANT Col) | oe eee.
eh ea
Adjust R317 for the lighting level on SG is 224B.
ra ey
uting
Leve
si
=
1500 kHz
C134 eden
Adjust for maximum
y
ewe
(400 Hz Mod.)
1500 kHz
P
(ANT
Sati Repeat steps (2)
38kHz
SUB
CHANNEL
CARRIER
LEAK
ALIGNMENT
at
131
+ ;
an
T
sae)
EQUIPMENT CONNECTION
Notes:
1. Cement antenna bobbin with wax after completing alignment.
eres
BceILOCCOPE
ADJUST
REMARKS
|
2. Make certain that speaker system is connected to the turne when alignment.
Connect to EXT. FM antenna terminal
Connect vert. Amp. of scope to point
R302 (38kHz Sub Ch. Carrier
Adjust for minimum oscilloscope
;
through Dummy
antenna.
TP303. Common
to chassis.
Leak
Control
| caat
FM-IF AND DETECTOR ALIGNMENT WITH OSCILLOSCOPE
(Refer to Fig. 10)
'
'
'
iia!
ee
PO
eager
ae
ae
INDICATOR
ADJUST
REMARKS
SEPARATION
ALIGNMENT
|
Eas ~
ee
ALIGNMENT CIRCUIT
ADJUSTMENT
REMARKS
Adjust T.01 of primary for maxi-
Adjust R304 and L303 for the minimum indication on VTVM from the
Connect vert. amp. of
Tor (FM Ist IFT)
mum amplitude.
SEPARATION
R304, L303
right side output when the left side of stereo modulator is modulated.
scope thru. electrolytic
Adjust R304 and L303 in the same way for the right side.
.
.
capacitor (25V 0.1uF)
sa nas a
ee
ese
to point TP203.
Adjust 7201 for maximum ampli-
;
O poin
oint of non-interference
Gonnntevebasc
=
T
tude and symmertrical curve.
91
OC)
TP101 terminal.
(ON/about 89 MHz)
Re E
Gna)
:
(Refer to Fig. A)
Common
to chassis.
Connect vert. amp. of
Adjust T202 so that proper linearity
scope to point TP204.
T 202 (Disc.)
between 100 kHz
Common to chassis.
(Refer to Fig. B)
rc
202
a
@
AM
IFT
TP303
T203
48)
Note:
Remove line cord antenna from FM external terminal when aligning.
FM-RF
ALIGNMENT
(Refer to Fig. 11)
|
@
SIGNAL SIGNAL
SIGNAL
RADIO
T204 |
COUPLING
FREQUENCY
SETTING
GENERATOR
GENERATOR
DIAL
INDICATOR
ADJUST
REMARKS
FM IFT
|
[D boo
!
[ tP301
Connect to EXT FM antenna
L104 (FM OSC Coil)
terminal through FM
|
90 MHz
Output meter across
Adjust for maximum
L101 (FM ANT Coil)
dummy antenna Common
(400 Hz Mod.}
EXT Speaker Jack (L).
output.
L102 (FM Detector Coil)
L104
L102
peu
FMOSC Cail
ey cre
Fcscm} jC)
38kHz
Sub Ch
amer Leak Control
D
@M
L301
9kHz
Pickup Coil
eparation
0
to ahassis.
C119 (FM OSC Trimmer)
Adjust for maximum
106 MHz
(400 Hz Mod.)
R304
106 MHz
C102 (FM ANT Trimmer)
output Repeat steps
C109 (FM Detector Trimmer)
(1) and (2).
TP302
Note:
As three output responses will be present proper tuning is the center frequency.
Fig. 10
Fig. 11
Advertisement
