– 51 –
– 52 –
– 49 –
– 50 –
PMC-DR50
5-10. SCHEMATIC DIAGRAM – CONTOROL SECTION –
Note:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
U
: B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : RADIO (COMMON)
(
) : CD
<
> : REC
[
] : PLAY
• 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.
z
Waveforms (CD SECTION)
1
IC701
ed
(RFO)
2
3
4
5
6
VOLT/DIV : 0.5 V AC
TIME/DIV : 1
µ
sec
IC701
6
(FEO)
IC701
rg
(TO)
IC751
wl
(PCO)
IC751
el
,
r;
(LRCK)
IC751
ua
(XTAO)
VOLT/DIV : 1 V AC
TIME/DIV : 1 msec
VOLT/DIV : 20mV AC
TIME/DIV : 1 msec
VOLT/DIV : 0.5 V AC
TIME/DIV : 5
µ
sec
VOLT/DIV : 1 V AC
TIME/DIV : 5
µ
sec
VOLT/DIV : 0.1V AC
TIME/DIV : 20 nsec
1.0 – 1.5Vp-p
0.6Vp-p
0.7Vp-p
875mVp-p
0.1162MHz
8.6
µ
sec
4.7Vp-p
22.85
µ
sec
271mVp-p
16.9344MHz
(PLAY MODE)
(PLAY MODE)
(PLAY MODE)
z
Waveforms – CONTROL SECTION –
1
IC801
rs
2
VOLT/DIV : 1V AC
TIME/DIV : 10
µ
sec
IC801
r;
VOLT/DIV : 0.5V AC
TIME/DIV : 50 nsec
4.8Vp-p
32.768kHz
2.5Vp-p
8MHz
