– 31 –
– 32 –
6-3-2. SCHEMATIC DIAGRAM — MAIN BOARD (1/4) — • Refer to page 46 for IC Block Diagrams.
MZ-E90
(Page 33)
(Page 37)
(Page 36)
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
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.
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
•
A
: B+ Line.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltage and waveforms are dc with respect to ground
under no-signal conditions.
no mark : PB
∗
: 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.
J
: PB
1
IC501
1
(TE) (TP523)
2
IC501
890qa
Approx.
12mVp-p
Approx.
130mVp-p
3
IC501
ed
(RF OUT) (TP528)
4
IC501
rf
(FE) (TP525)
Approx.
1.2Vp-p
Approx.
10mVp-p
• Waveforms
(MODE:PLAY)
