DOWNLOAD Sony XDR-S20 Service Manual ↓ Size: 1.49 MB | Pages: 26 in PDF or view online for FREE

Model
XDR-S20
Pages
26
Size
1.49 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
xdr-s20.pdf
Date
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5
XDR-S20
2-2. CHASSIS SECTION
2-3. KEY BOARD
4
 
screw
     (M 3
 
×
 6 lock ace)
1
 
knob (VOL)
2
 
knob (TUNE MODE) 
3
 
knob (TUNE)
three claws
two claws
5
 
telescopic antenna
cabinet (rear) assy
6
 screw
     ((+) BV tapping (B2.6))
8
 CN301 (5P)
9
 CN951 (3P)
0
 antenna contact plate
qa
 chassis section
7
1
 four screws
4
 KEY board
2
claw
claw
claw
3
Remove the three solders. 
6
XDR-S20
2-4. MODULE ASSY (TU1)
4
 module assy (TU1)
1
 CN1
claw
claw
claw
3
Remove the two solders. 
2
Remove the solder.
2-5. MAIN BOARD, MICRO COMPUTER BOARD
3
 arm (jog B)
4
 arm (jog A)
5
 two screws 
8
 MAIN board
2
 retainer plate
qs
 MICRO COMPUTER board
chassis
6
 screw
9
 screw
0
 screw
qa
 screw
7
 screw
claw
claw
claw
claw
1
 two screws
     ((+) P tapping (B2.6))
7
XDR-S20
FM  SECTION
BAND switch: FM
FM FREQUENCY COVERAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital voltmeter
L4
87.5 MHz
1.4 
±
 0.1 V
Confirmation
108.0 MHz
5.8 
±
 1.0 V
FM TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter.
L3, L5
87.5 MHz
CT1
108.0 MHz
Adjustment Location: MAIN BOARD
SECTION  3
ELECTRICAL  ADJUSTMENTS
telescopic
antenna terminal
0.01
µ
F
FM RF signal
generator
22.5kHz frequency deviation 
by 400Hz signal
Output level: as low as possible
set
16 
Ω
set
Headphone jack (J301)
level meter 
digital
voltmeter 
100 k
Ω
TP (VT)
L3:
FM TRACKING ADJUSTMENT
L5:
FM TRACKING ADJUSTMENT
L4:
FM FREQUENCY COVERAGE 
ADJUSTMENT
CT1:
FM TRACKING ADJUSTMENT
IC1
CF3
CF2
CF1
– MAIN BOARD  (COMPONENT SIDE) –
•
Repeat the procedures in each adjustment several times, and
the frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
2
6
C26
R6
-
JC8
X1
IC1
30
16
1
15
C15
JC102
JC5
C31
C24
C28
R24
R11
R12
C17
C18
C25
L3
L5
L4
R31
R32
C27
CT1
C30
5
C33
JW26
C14
C13
R19
D7
R13
D8
R23
R26
R27
R25
R22
R21
R20
Q3
B C E
JW31
JW32
JW33
JC602
JC601
JC103
R606
R605
R604
R602
JW34
S601
S603
S602
S604
JW35
C37
TUNE MODE
TP
(VT)
– MAIN BOARD – (CONDUCTOR SIDE)
TP(VT)
8
XDR-S20
SECTION  4
DIAGRAMS
•
Note for Printed Wiring Boards and Schematic Diagrams
for schematic diagram:
•
All capacitors are in 
µ
F unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
•
All resistors are in 
Ω
 and 
1
/
4
 
W or less unless otherwise
specified.
•
C
: panel designation.
•
A
: B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : FM
<         >
  
: DAB
•
Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
•
Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
•
Circled numbers refer to waveforms.
•
Signal path.
F
: FM
E
: DAB
for printed wiring boards:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
Note: The components identified by mark 
0
 or dotted
line with mark 
0
 are critical for safety.
Replace only with part number specified.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
• Circuit Boards Location
KEY board
MICRO COMPUTER board
HEADPHONE JACK board
AC INLET board
POWER board
MAIN board 
TU1
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