Pioneer SX-535 User manual

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SERVICE MANIIAL
AM IFM STEREO RECEIVER
sixr535
KCU. FV, GN
'r--t NOTE:
MODEL SX-535 COMF,S IN THREE VERSIONS DISTINGUISHED AS FOLLOWS:
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Round label on
rear panel Voltage Type
KCU
FV
GN
120V only
110v, r20v,130v,
22OV and 240V
(Switchable)
220V only
CSA (Canada) and UL (U,S.A.)
approved
General export model with
de-emphasis selector switch
SEMCO (Sweden), NEMCO
(Norway) and DEMCO (Denmark)
approved
<74E02Y61H> (v)rqoNEER=

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CONTENTS
1. SPEC|F|CAT|ONS... .....3
2. FRONTPANELFACTLTTTES .... 5
3. CONNECTION DIAGRAM
4. DTSASSEMBLY. .....8
5. BLOCK DIAGRAM AND LEVEL DIAGRAM 9 ,
6. PARTS LOCATION . . .11
7. ADJUSTMENTS
8. DIAL CORD STRINGING . . .22
9. PACKING METHOD AND PARTS NUMBERS . . . . .23
10. EXPLODED VIEW AND PARTS LIST . . .24
11. SCHEMATIC DIAGRAM, P.C. BOARD PATTERNS AND PARTS LIST
11.1 Schematic Diagram . .Zg
1'1.2 Electro-parts List . . .31
11.3 TunerAssembly(AwE-046)... .....33
11.4 EqualizerAmplifierAssembly(AWF-014) ... ....40
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11.7 PowerAmplifierAssembly(AWH-0351 ... ..rtg
11.8 Power Supply Circuit Assembly (AWR-06S, AWR-0671 . .Sz

sX-535
3. CONNffi#Kffiffiru DIAGRAM
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t
SPEAKER SYSTEMS
(A) (B)
OUTDOOR
FM ANTENNA T.TVF€ ATUTENNA AM ANTENNA
{indoor or outdoorl R IGHT [.EFT
CHANNEL CHANNEL
GROUruD
Connect to
lfround tgrminal
of turntable,
tapc dock" otc.
For 75f2
coaxial cable
TURNTABLE
R DIN TYPE
F ffi:ffi:'#!x.,o'r
@
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FM DE.EMPHASIS SWITCH
ln some countries, the receiver
is dslivered with a selector switch
for adjusting the FM deemphasis
from 5O to 7Spsec. lf your unit
is eguipped with such a siwtch
on the rear pane!, and. if the high
sound rangp gives an inrpression
of rnnakness move the deem.
phasis switch to its other posi-
tion. {5 line voltage rnodel only}
LINE OUTPUT
LINE INPUT
LINE
I
CARTRIDGE TAPE DECK
TAPE PLAYER (open-reel, cassettel
OTECTION FUSE
TAPE DECK
(opcn-recl, cascttel
LEFT RIGHT
CHANNEL CHANNEL
t-ol
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T-
4.DISAS$EMBLY
To remove the wooden cabinet, remove 2 screws each fastening either
side and lift the cabinet while sliding it backwards.
Pull off all the knobs"
To remove the front panel, remove 2 screws fastening its top and nuts
and washers holding each of BASS and FUNCTION control shafts.
To remove the bot,tom plate, remove a total of 15 screws.
1.
q
.t
o.
4.
^\o
x
Wooden
Cabi net
[s".\ffiq
Nt'
IP
i "=b".l
Bottom Plate

7. ADJUSTMENTS
FM Section
1. Switch positions on the SX-535:
FUNCTION
FM MUTING
POWER .. ..,c
2. Connection of instruments:
FM Signal Generator (FM SG)
AC Voltmeter
Distortion rneter
Oscilloseope
3. Set FM SG to
1-00d8 output.
4. T\rne FM SG and SX-535 to dial readings of 87.4MHz (left scale end) and
adjust T3 so that signal meter makes maximum deflection
LUOVo modulation
FM
OFF (pressed in)
ON
Connect to FM ANTENNA termi-
nals through 300Q dummy anten-
na.
Connect in parallel to TAPE REC
jack.
(17 SkHz deviation) at 400H2 and
EiX-Ei35
D.
6.
7.
8.
9.
10.
o
11
L2.
13.
L4.
15.
16.
Adjust T5 (lower core) so that tuning meter points to the center.
Set FM SG output to 8-10d8 and adjust T1, T2 and T3 to maximize
audio frequency output level.
Tune FM SG and SX-535 to dial readings of 106MHz and adjust TC3 so
FM SG output is
that signal meter makes maximum deflection when
100d8.
Set FM SG output to 8-10d8 and
maximize audio frequeney output level. adjust TCl , TCz and TCB to
Tune FM SG and SX-535 to dial readings of 87. 4MHz and adjust T4 so
that signal meter makes manimum deflection when FM SG output is
1 00d8.
Set FM SG output to 8-10d8 and adjust T1, T2 and T3 to maximize
audio frequency output level.
Repeat steps 7 through 10 so that output is maximized when the dial
indieates the given frequeneies.
Tune FM SG and SX-535 to dial readings of 87.4MHz andadjust T4 to
maximize audio frequency out'put level when FM SG output is 8-10d8.
Detune SX-535 so that only noise is received.
Adjust Tb (lower core) so that tuning meter points to the center.
Tune FM SG and SX-535 to dial readings of 98MHz. Fine tune SX-535,
observing tuning meter.
Set FM SG output to 60dB and adjust T5 (upper core) to minimize
distortion;
Set FM SG output to 100dB and adjust VR4 so that signal meter
readings
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13

FM MPX Section
o The SX-535 incorporates a PLL demodulator circuit. This adjustment
should only be made when MPX IC has been replaced.
o This adjustment should be made after completion of FM section
adjustment.
1. Switch positions on the SX-535:
FUNCTION
FM MUTING FM
OFF (pressed in)
ON
Conneet to FM ANTENNA termi-
nals through 300O dummy anten-
na.
Connect to FM SG's external mod-
ulator terminals.
Connect horizontal input to MPX
SG's PILOT OUT termianls and
vertical input to No. 18 terminal of
tuner assembly.
Distortion meter Connect to TAPE REC jack.
3. Tune FM SG and SX-535 to dial readings of 98MHz.
4. Set MPX SG to +67.5kH2 deviation at lkHz for left and right ehannels
and FM SG output to 60d8.
5. Produce a Lissajous pattern on oseilloscope and adjust VR1 to make the
pattern still.
POWER
2. Connection of instruments:
FM Signal Generator (FM SG)
MPX Signal Generator (MPX SG) .
Oscilloscope
6. Set MPX SG to !67.5kH2
and to t7.5kHz deviation
60d8.
7 " Adjust T4 to
channel.
Nci. 18
deviation at lkHz for left and right ehannels
for 19kHz pilot signal. Set FM SG output to
minimize distortion of audio frequencies for left or right
Tuner Assembly (AWE-0461
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