– 43 – – 44 – – 45 –
MZ-R55
6-9. SCHEMATIC DIAGRAM — MAIN SECTION (2/3) — • Refer to page 49 for IC Block Diagrams.
(Page 42)
(Page 42)
(Page 42)
(Page 48)
(Page 42)
(Page 42)
(Page 47)
(Page 48)
5
6
IC802
$º
2.3Vp-p
VOLT/DIV : 0.1V AC
TIME/DIV : 10µsec
IC805
8
1.4Vp-p
• Waveforms
12kHz
32kHz
VOLT/DIV : 1V AC
TIME/DIV : 20nsec
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.
• C : panel designation.
• A : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3 V and fed with regulated dc power
supply from external power voltage jack.
• Voltage and waveforms are dc with respect to ground
under no-signal conditions.
no mark : PB
( ) : REC
• Voltages are taken with a VOM (Input impedance 10 MΩ).
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.
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