Schematic Diagram - Sony MZ-E55 Service Manual

Refer to page 26 for IC Block Diagrams.

6-4. SCHEMATIC DIAGRAM

r
*Note:
Use R1001 only with Ver.3 of
microprocessor (IC801).
Using R1001 with other micro-
processor versions will cause
operating errors so be sure to
remove it.
You can check the version with
Test Mode (page 7).
– 21 – – 22 – – 23 –
r Waveform.
1 5
743 mVp-p
5.76 µ sec
IC901 !∞
VOLT/DIV : 200 mV AC VOLT/DIV : 0.1 V AC
IC501 @•
TIME/DIV : 5 µsec TIME/DIV : 2 µsec
VB
2 6
2.7 Vp-p
5.78 µ sec
23 µ sec
IC901 @¡
VOLT/DIV : 1 V AC VOLT/DIV : 20 mV AC
IC601 #ª
TIME/DIV : 10 µsec TIME/DIV : 2 µsec
DI
3 7
2.6 Vp-p
5.56 µ sec
482 nsec
IC901 @™
VOLT/DIV : 500 mV AC
IC601 $¡
PWMI
TIME/DIV : 200 nsec
4 8
2.0 Vp-p
5.68 µ sec
16.9344 MHz
IC551 !∞
VOLT/DIV : 500m V AC
IC601 $ª
L1
TIME/DIV : 20 nsec
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 / W or less unless otherwise
4
specified.
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 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : PLAY
• Voltages and currents are taken with a VOM (Input im-
pedance 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 : PLAY
– 24 – – 25 –
MZ-E55
269 mVp-p
63 mVp-p
7.9 Vp-p
VOLT/DIV : 2 V AC
TIME/DIV : 2 µsec
3.2 Vp-p
VOLT/DIV : 1 V AC
TIME/DIV : 2 µsec