XR-M510
25
25
Note on Printed Wiring Board:
•
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
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side)
the parts face are indicated.
7-5.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
U
: B+ Line.
•
H
: adjustment for repair.
• 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
(
) : MW
[
] : LW
〈〈
〉〉
: TAPE PLAYBACK
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: MW/LW
L
: BUS AUDIO IN
E
: TAPE PLAY
• Abbreviation
SE
: South European model
• Please refer to servicing notes (page 3) for system of
TYPE A and B.
• Waveforms
– MAIN Board –
1
IC700
5
OSCI
2
IC601
ud
X1A
3
IC601
od
X1
4
IC607
ih
EXTAL
– DISPLAY Board –
5
IC901
oh
OSC
2.4 Vp-p
231 ns
3.1 Vp-p
305
µ
s
3 Vp-p
54 ns
3.2 Vp-p
22.8
µ
s
3.2 Vp-p
22.8
µ
s
5.5 Vp-p
272 ns
6
IC902
oh
OSC
• DISPLAY board is four-layer printed board.
However, the patterns of layers 2 and 3 have not been included
in this diagrams.
• Abbreviation
SE
: South European model
• Please refer to servicing notes (page 3) for system of TYPE A
and B.
