Tuner Section Schematic Diagram - Sony STR-AV880 Service Manual

STR-AV880 STR-AV8&80
2-4, TUNER SECTION SCHEMATIC DIAGRAM
Note on Schematic Diagram: ® Switch
@ All capacitors are in wF unless otherwise noted. pF: ueF
50WV or less are not indicated except for electrolytics
Switch Position
and tantalums. : $301 FM ANT-A ON
e All resistors are in Q and % W or less unless otherwise $302 FM ANT-B OFF TM302 : erie 7POOT a ar
specified. $303 AM OFF ela Rios Al a
@ ammmfeem > FM signal path, $304 SCAN : OFF Rac be 'N08 37108
® A: internal component. $305 METER SELECT power output spectrum ANT-B a 9 (Ol Rt FM RFC)
e +Evd+ : nonflammable resistor. $306 IF BAND NORMAL if as ROE | ati L103 'ee | tion
: ° $307 VIDEO
OFF
= s 47 | iL FM RF«2) cio?
0,65] 102 ye j-—4
© mmm © B+ bus. r- wT® re — ; Sl (Tj a es 2.2p (0) (y iLife
© mem : B— bus. $308 1 EE | C tgtyls ) ie niaak
e [_] : adjustment for repair. as ; ee ate D102 3 Q
. . Ino O Hi o
e@ Voltages are dc with respect to ground unless otherwise 5311 PRESET OFF a Acs cos abate i E (i! ck
noted. 4, l0OKF OO1T 474F0.017 ETE: ciog L il 0.001
e@ Readings are taken under no-signal (detuned) conditions $312 FM MODE STEREO His i y Vanes -
with a VOM (50 kQ/V). $313 SEARCH START OFF _
( ): $314 FM LEVEL OFF DIO! — 103 ——4
F . $315 AUDIO OFF KV1320
e sea pelesl pee
ae
Biggs PyS Teles
$316
2
OFF
TM903 oscilloscope.
Voltage variations may be noted due to normal produc- aa 2 BEE
tion tolerances. $319 0 OFF AM
$320 | ERASE OFF tr cant aa
Note: The components identified by shading and mark $321 3 OFF uPC4S7OHA Kvio26""
A ate critical for safety. Replace only with $322 6 OFF ASE
t b ifi $323 9 OFF DI4I , 142 Be
$325 CARTRIDGE MC 1$1555 a
$326 STATION SCAN (—} -
$328 STATION SCAN (+) ce
Note on Ceramic Filter (CF101, 102, and 103) $329 | TAPE 1 OFF |
Replacement and Solder Jumper Connection, BaD TAREE, OFF ee.
FM IF circuit employs three ranks of ceramic fiiter (CF101, Piger eee i a | | |
102, and 103) which have different center frequency. CF 104, S38e 8 i MIDE 2 eer |
102, and 103 should be used the ceramic filters of same rank. Soae EY DEE
The solder jumper connection will be different depending on ant PHONG One
the rank of ceramic filter. (The solder jumper connection is Sees EMIAM EM mi
necessary to match the center frequency of the ceramic filter ag SOUR OFF KViz20 ee
$337 VOLUME (—) =
$338 VOLUME (+) =
Rank of FM $341 | BALANCE (R) OFF
ceramic filter intermediate $342 TREBLE (+) -
(MHz) | (50k) | frequency (MHz) $343 TREBLE (—) -
$344 BALANCE (L) OFF
$345 VIDEO 2 F/R FRONT
$346 BASS (+) -
used with FM intermediate frequency.)
FM OSC Ose
White (10.75) 10.75
Red (10.7) 10,7
Black (10.65)
10.65
$347 BASS
(—)
=
PROGRAMMABLE
COUNTER
' i
|
22H
Q104 Q103
2SC2724 —C ecaraa—C
$348 MUTE OFF
connected: O $349 FLAT ore (iidL YE gd yy eb
not connected: X $350 MEMORY OFF
color mark $351 ACOUSTIC OFF
(White, Red, Black) $361 SUBSONIC OFF
SYSTEM POWER OFF
SURROUND OFF
SPEAKERS-A ON N/\ je
SPEAKERS-B OFF
* "Qo7pSEC
AN
POWER
—49— | -_ —50—