MC-S50
14
14
Note on Printed Wiring Board:
•
Y
: parts extracted from the conductor side.
•
f
: internal component.
•
: 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.
4-2.
NOTE FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS
• AUDIO, LOGIC and POWER boards are multi-layer printed
board.
However, the patterns of intermediate-layer have not been in-
cluded in this 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.
•
%
: indicates tolerance.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground in
playback mode.
no mark : 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.
• 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
: PLAYBACK
*
The voltage and waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
form that of conventional IC.
*
Lead Layouts (IC601 and IC901)
surface
Lead layout of conventional IC
CSP (chip size package)
4-3.
PRINTED WIRING BOARD – LOGIC Board –
: Uses unleaded solder.
(NOT SUPPLIED)
(NOT SUPPLIED)
(NOT SUPPLIED)
(NOT SUPPLIED)
B
E
C
B
C
D
1
2
3
4
5
A
Ref. No.
Location
• Semiconductor
Location
D801
B-5
D802
C-2
D901
C-2
D902
C-2
D903
D-3
IC601
D-4
IC602
B-3
IC603
A-3
IC604
C-3
IC801
B-4
IC901
D-2
Q901
D-3
(Page 18)
(Page 16)
