Sony XR-1800R Service Manual ▷ View online
– 17 –
SECTION 5
DIAGRAMS
5-1.
NOTES FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : MW
〈〈
〉〉
: LW
[
] : TAPE PLAYBACK
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
f
: MW (LW)
E
: TAPE PLAYBACK
• Abbreviation
G
: German model.
SE
: South European model.
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
¢
: internal component.
• b
: Pattern from the side which enables seeing.
– 18 –
• Waveforms
– MAIN Board –
– MAIN Board –
1
IC1
8
(X IN)
2
IC1
!¡
(XT IN)
4
IC150
0
(XI)
– KEY Board –
1
IC900
^º
(OSC)
3
IC121
@º
(XO)
3.2 Vp-p
125 ns
2 Vp-p
30.5
µ
s
3.7 Vp-p
139 ns
2.1 Vp-p
230 ns
2.4 Vp-p
26.6
µ
s
XR-1800R
– 19 –
– 20 –
5-2.
PRINTED WIRING BOARD – MAIN Section –
• Semiconductor
Location
Ref. No.
Location
D50
E-1
D51
E-1
D52
F-3
D53
F-3
D61
F-4
D62
F-4
D63
F-4
D64
F-4
D65
G-3
D66
G-3
D67
G-5
D100
D-6
D350
F-5
D351
E-4
D501
C-4
D502
C-4
D550
D-3
D600
B-4
D601
C-3
D602
B-3
D603
C-3
D604
D-2
D605
D-2
D606
D-2
D607
D-1
D608
D-2
D609
C-2
D610
D-1
IC1
F-2
IC50
G-2
IC120
C-7
IC121
D-6
IC150
F5
IC350
F-6
IC450
D-4
IC500
B-5
Q50
G-3
Q51
G-3
Q100
F-7
Q101
E-6
Q102
E-6
Q103
E-6
Q104
E-6
Q105
E-6
Q106
D-6
Q120
D-7
Q121
C-7
Q150
E-4
Q151
E-5
Q250
E-7
Q251
E-7
Q252
E-4
Q350
F-5
Q351
E-5
Q554
D-3
Q556
D-3
Q600
D-3
Q601
D-2
Q602
D-2
Q603
D-2
Q604
D-2
Q605
D-2
Q607
C-2
Q608
D-3
Q609
D-3
Q610
D-2
Q611
G-3
Q612
G-2
Q613
C-2
Q614
D-2
Q615
C-2
(Page 26)
– 21 –
– 22 –
XR-1800R
5-3.
SCHEMATIC DIAGRAM – MAIN Section (1/2) –
•
See page 18 for Waveforms.
•
See page 29 for IC Block Diagrams.
Click on the first or last page to see other XR-1800R service manuals if exist.