Sony ICF-2001D - Sync Adjustment; Synchronous Detection Adjustment Procedure

ICF-2001D/2010
SYNC ADJUSTMENT
Note: Frequency setting may alter when adjusted
with shield plate (K) removed from sync
board.
USB and LSB/CW modes are not provided for
sets to the Middle Easts and Saudi Arabia.
Setup:
Band: AM
Mode: as directed
AM RF GAIN control: as adequate
Frequency: as directed
(11,800.0 kHz when AM RF SSG is
used)
MANUAL TUNE MODE: SLOW
SYNC switch: as directed
Remove shield plate (K) and connect a test /ead to pin6
(varicap voltage) for VT VM and frequency counter and
re-install shield plate (K)
AF output ——*
Procedure:
1
. Correctly and just tune in the set to a known,
stable and strong AM station in NARROW and
SYNC OFF modes.
. Set mode to USB.
3. Adjust VT1 fora 1.5V DC VTVM reading.
. Adjust CT601 for a zero-beat note and waveform.
> morn.
NG OK NG
. Turn SYNC switch on and, adjust VT2 and set it
to the point at which SYNC LOWER indicator just
turns off to SYNC UPPER indication.
Slowly turn VT2 back to the point at which SYNC
UPPER indicator just turns off to SYNC LOWER
indication, and leave VT2 as is.
UPPER (©) e tt bs O
LOWER +$ O tt
. Turn MANUAL TUNING knob to obtain a fre-
quency indication just 100 Hz above the carrier of
the station being received. (only ‘‘one’ advance-
ment in the first digit). Now, the SYNC UPPER
indicator should lit.
. Frequency counter should read 3.640 MHz +100
Hz.
Adjustment Location:
— main board —
Vv72