Sony ICF-2001D - PLL and VCO Adjustments; PLL1 Frequency Adjustment (FM); VCO2 Freerun Frequency Adjustment (AM)

PLL1
FREQUENCY
ADJUSTMENT
Setup:
Band: FM
Frequency: 89.300 MHz
frequency
counter
to base Q13
Procedure:
Adjust CT4 for a 100.000000 MHz or 100 MHz + 30
Hz reading.
Adjustment Location
— main board —
_I¢F-2001 D/2010
VcO2
FREERUN
FREQUENCY
ADJUSTMENT
Setup:
Band: AM
Remove shield plate (N) and install adjustment jumper wire
between
3V
B+
and
the
gate
of
Q31,
and
then
re-install
Shield plate (N).
adjustment jumper wire
shield plate (N)
Procedure:
1. Adjust CT7 for a 54.000MHz or 54.0 MHz
+ 300 kHz reading.
. Unsolder adjustment jumper wire at B+ land side,
Connect this end to ground land. Counter reading
should now be less than 46.2 MHz.
. After the adjustment, remove the adjustment
jumper wire and properly re-install shield plate
(N).
Adjustment Location:
— main board —