Sony ICF-2001D - Adjustments; Timer-Clock Frequency Adjustment

ICF-2001D/2010
SECTION 3
ADJUSTMENTS
TIMER-CLOCK
FREQUENCY
ADJUSTMENT
3-1. ADJUSTMENTS
Note:
1.
Disassembly
is
required
to
perform
electrical
ad—
Note:
Remove
shield
plate
(J)
on
the
Key
Board
re-
justments,
Refer
to
SECTION
>
“DISASSEM-
ferring
to
the
DISASSEMBLY
section.
Make
BLY”.
Two
regulated
DC
power
supplies
are
need-
jumper-wire
connections,
or
re-install
shield
ed
for
a
complete
operation
of
the
set.
The
set
plate
(J)
after
connecting
frequency
counter.
does
not
work
good
only
with
a
4.5V
DC
supply.
Be
sure
to
connect
two
power
supplies
to
the
proper points shown. frequency counter ;
capable of low-frequency counting
to pin 20 of 1C502
Setup:
2.
Positions
of
controls
and
switches
are
as
follows
‘unless
otherwise
specified.
MAIN
POWER
switch:
ON
POWER
switch:
ON
tebe
tb
grolnd
AM
ATT
switch:
DX
MANUAL
TUNE
MODE:
as
required
TONE
control:
HIGH
VOLUME
control:
as
required
All
key
switches:
as
required
3.
When
shield
plates/cases
are
removed,
be
sure
to
é
Yh
ff
PWN
'
connect
jumper
wires
across
appropriate
soldering
dh
4
4\)
lands
to
recover
electrical
connections
without
shield
plates/cases.
4. Checkings to the key-input operation of the key
board can be made independently by grounding
pin 9 (UNLOCK) of IC502, ie., by macking a
locked
condition.
{fs
3
i
frequency
counter
Procedure:
Adjust CT501 for a 32.7680 kHz counting.
Adjustment Location:
— key board —
shield plate (J)
ground