SONY PMC-DR50L, PMC-DR70L Service Manual
PMC-DR50L/DR70L
SERVICE MANUAL
Ver 1.0 1999.09
Photo : PMC-DR70L
TAPE Model Name Using Similar Mechanism NEW
Section T ape Tr ansport Mechanism Type MF-PMCDR50
CD
Section
AEP Model
UK Model
E Model
PMC-DR50L/DR70L
Tourist Model
PMC-DR50L
Model Name Using Similar Mechanism NEW
MD Mechanism Type KSM-213CCP
Optical Pick-up Type KSS-213C
SPECIFICATIONS
– Continued on page 2 –
MICROFILM
PERSONAL COMPONENT SYSTEM
5-5. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) –
p
p
r
Refer to page 74 for IC Block Diagram.
PMC-DR50L/DR70L
r
Waveforms – MAIN SECTION (1/3) –
1
1.5Vp-
75kHz
IC3 @¡
2
IC4 !¢
VOLT/DIV : 0.5 V AC
TIME/DIV : 5 msec
556mVp-
4.332MHz
VOLT/DIV : 0.2 V AC
TIME/DIV : 50 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/
specified.
¢
•
• U : B+ Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
• Voltages are tak en with a V OM (Input impedance 10 MΩ).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
: internal component.
under no-signal (detuned) conditions.
no mark : FM
( ) : MW
<>: LW
Voltage variations may be noted due to normal production tolerances.
Voltage variations may be noted due to normal production tolerances.
F : FM
f : MW
L : LW
4
W or less unless otherwise
– 39 – – 41 –– 40 –
PMC-DR50L/DR70L
5-6. SCHEMATIC DIAGRAM – MAIN SECTION (2/3) –
r
Refer to page 74 for IC Block Diagrams.
r
Refer to page 45 for Waveforms.r Refer to page 45 for Notes.
– 42 – – 44 –– 43 –
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