Sony STR-VX4 - Page 13

FM Muting Level Adjustment
Setting:
MUTING switeh: ON
Procedure:
FM rf signal
generator vTrvie
G07 wr ee
———,
: f i Po set Po}
FM antenna OUTPUT
ne
terminal AT302
Carrier frequency: 88 MHz
Modulation: 400.H2, 76 khz deviatian (100%)
Output level: 5.6 wlf (20 dB} :
i. Tune the set to 98 MHz by. pressing the
MANUAL TUNING switches.
2... Adjust RT302 so that VTVM reading suddenly.
changes,
R202
FM Stereo Separation Adjustment ‘ ee
FM stereO i rey VIVAL
Procedure: mutaut channel | : bonnection 4 teseing 148)
FM rf stereo LCH | LH Ew
signal aes api IE eee ee :
i i :
ee vIVM Avo MB
: : bos Adjust
R-CH L-CH > RT202 for
oo aminkmam:
: R-CH RCH
FM ANT REC OUT aaa fen _
Carrier
frequency:
G8MHz
i
bo
Adjust
oe
or level: im¥ (6008) L-CH | RACH RY202 for
ode: Stereo : fel vey oe
Modulation:
|
minimum.
: o.. readingco 5
Audie (400 Hz). sub-channel: 33.78 kHz deviation [48 %)}
Pilot (19-kH2): 7.8 kHz deviation (10%)
L-CH Stereo separation: @ —{B)
R-CH Stereo separation: © ~O
The ‘separations of both channels should. be
equal.
[AM SECTION]
@ Repeat the procedures in each adjustment
several times, and the frequency coverage and
tracking adjustments should be finally done by
the trimmer capacitors
Adjustment should be done fram /
the component sida. :
1303
C7302 | 22¥
1610 kHe
vou
Le range
fF ALIGNMENT
Adjust fora maximum reading
pa VOM,
450 kHz » IPT3OL
ND
[ "TRACKING ADJUSTMENT
| Adjust for a maximum reading
om VIVA. : {
ee ious Greer
OGL | 600 ke
€T301 1406 kHz
@i4 +f signal
generator
Put the lead-wire
antenna close. to
the see
30% amplitude
modulation &y
400 Mz signal
|
|
i
|
|
Automatic Stop Level Adjustment
AM rf signal
genreraror
ARTIOT
0:04 aF AM ANT
set
Modulation: ne modulatiag. —
|
| Carrier frequency: (OOO kee
Setting:
RT301:.mechanical mid
Procedure:
1. Tune the unit to the 1,000 kHz signal,
2s Adjust output level of signal gener. so. that
the second segment of SIGNAL LED lights up.
After the second segment of SIGNAL LED goes
off, adjust RT301 so that it lights up aga)
— Pam
cpttgpeoce negara ee aia Sab era
Semiconductor Lead Layouts
28410278
288731
280809
288647-8
288834
2801986
2807 10-14
x
KL}
2847015
28C1362
2801364
28c1400
28D667-A
anode
28K 246 S4V B40
iS
1555
ao)
10E-2
HZ6A2L
HZ30-3L
Sx-761A
H27A1L
CX-778A
LA1235
nee
LA1245
cathode
LAS390
1
TL4g9cP
uPAGIC
2PD4011C
uPC4557C
™™
anode
HOSS
uPDS530134
iPass Figs
(Top view)
STK-3042
STK-2230
GL-SNYGS-A
i
on |
OF a i short
ah
' Cathode
GL-SPR20
GLONG?
anode
KV-1226