Sony ICF-6800W - VCO Adjustments

13. VCO1 FREQUENCY COVERAGE
| ICF-6800W ICF-68OOW |
MEMO
WHEN THE INTERNAL FREQUENCY
ADJUSTMENT COUNTER IS DEFECTIVE
Note: Perform this adjustment from the lowest frequency.
Perform
the
adjustment
from
the
step
|
to
3°
external frequency counter
successively.
;
’
main
board
(conductor
side)
Setting:
BAND SELECTOR switch: SW
Procedure:
Note: For all the steps, disable VCO2 by touching CV1-11
with a finger as shown below.
INTERNAL FREQUENCY | INTERNAL FREQUENCY
SW
BAND
MW/SW
COUNTER
IS
NORMAL
|COUNTER
IS
DEFECTIVE
SELECTOR
TUNING
DIAL
INTERNAL
FREQUENCY
COUNTER INDICATION
EXTERNAL FREQUENCY
COUNTER INDICATION
10 MHz switch...0 | full-counter- i 2145 + 30kHz 21200 + 30kHz
1.
1
MHz
switch...
0*|
clockwise
34
(2115
—
2175
kHz)
(21170
—
21230kHz)
(SW1) | 10MHz switch... 0 : 11045 + 30kHz
1 MHz switch...9 | full clockwise CT8 4 (11015 — 11075 kHz)
10 MHz switch... 10 full-counter-
2 MHz switch... 0 clockwise
20745 + 30kHz
(sw2) | 10MHz switch .. 10 ;
1 MHz switch...9 | full clockwise | CT10 (20715 — 20775 kHz)
10MHz switch.. 20 | full-counter- 21745 + 30kHz
3. 1 MHz switch... 0 clockwise (21715 — 21775 kHz)
sw3 itch ..
¥9) TOME teh 29- Tu ctoawie
(hot side)
LE
30100 + 30kHz
(30070 — 30130kHz)
11745 + 30kHz 30800 + 30kHz
(11715 — 11775 kHz) 30770 — 30830 kHz
39800 + 30kHz
(39770 — 39830kHQ
40800 + 30kHz
(40770 — 40830 kHz)
30645 + 30kHz 49700 + 30kHz
(30615 — 30675 kHz) (49670 — 49730 kHz)
Loosen the selector knob a bit and turn and set to ‘“‘0”.
Touch this
conductor.
(vco2)
—~45—
—~46-—