– 31 –
– 32 –
– 34 –
– 33 –
– 35 –
6-5. SCHEMATIC DIAGRAM (MAIN SECTION)
r
Refer to page 51 for IC Block Diagrams.
ZS-D50
r
Waveforms (Main Section)
1
ERASE HEAD
ATT : 1/10
VOLT/DIV : 1 V AC
TIME/DIV : 5
µ
sec
2
3
4
Q305 COLLECTOR
VOLT/DIV : 5 V AC
TIME/DIV : 5
µ
sec
5
Q303, 304 EMITTER
VOLT/DIV : 5 V AC
TIME/DIV : 5
µ
sec
T301
ATT : 1/10
VOLT/DIV : 1 V AC
TIME/DIV : 5
µ
sec
T301
VOLT/DIV : 2 V AC
TIME/DIV : 5
µ
sec
25.8 Vp-p
16.65
µ
sec
61 Vp-p
16.65
µ
sec
13.7 Vp-p
16.65
µ
sec
17.6 Vp-p
16.65
µ
sec
17.6 Vp-p
16.65
µ
sec
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.
Note: The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
•
U
: B+ Line.
• Power voltage is dc 12V and fed with regulated dc power
supply from external power voltage jack.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
<
> : REC
• 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.
• Signal path.
F
: FM
E
: PB (L-CH)
a
: REC (L-CH)
d
: PB (R-CH)
G
: REC (R-CH)
J
: CD