– 23 –
– 24 –
– 21 –
– 22 –
ZS-X7
z
Circuit Boards Location
CD board
SW (1) board
SW (2) board
MAIN board
CONTROL board
OPEN/CLOSE board
RELAY board
REGULATOR board
TUNER board
HEADPHONE board
DC IN board
BATT (R) board
BATT (L) board
RESET board
6-3. SCHEMATIC DIAGRAM (TUNER SECTION)
r
Refer to page 45 for IC Block Diagram.
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.
•
¢
: internal component.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 12 V and fed with regulated dc power
supply from external power voltage jack (J901).
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
) : AM
• 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
r
Waveform
1
VOLT/DIV : 0.1V AC
TIME/DIV : 5
µ
sec
274 mVp-p
32.768 kHz
IC2
wa
XOUT
