– 37 – – 38 – – 39 –
MZ-R55
6-7. SCHEMATIC DIAGRAM — MAIN SECTION (1/3) — • Refer to page 46 for IC Block Diagrams.
(Page 43)
(Page 40)
(Page 42)
(Page 45)
(Page 44)
(Page 40)
(Page 40)
(Page 42)
• Waveforms
1
2
3
4
Approx. 0.5Vp-p
IC501 @ª
IC503
!¡
2.4Vp-p
IC501
#•
IC503
!¶
2.4Vp-p
22.5MHz
1.0±0.3Vp-p
13.4msec
VOLT/DIV : 1V AC
TIME/DIV : 20nsec
VOLT/DIV : 0.5V AC
TIME/DIV : 1µsec
VOLT/DIV : 0.1V AC
TIME/DIV : 0.1msec
VOLT/DIV : 1V AC
TIME/DIV : 5msec
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 ! or dotted line
with mark ! are critical for safety.
Replace only with part number specified.
• A : B+ Line.
• 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
∗
: Impossible to measure
• 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.
• Signal path.
J : PB (digital)
c : REC (digital)
• Abbreviation
HK : Hong Kong model.
JE : Tourist model.
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