Icom IC-R7O Maintenance Manual page 43

Receiving . | # Display frequency: AC Millivalt Meter Adjust noise Front panel AF GAIN
gain near 28 MHz
level ta 2.5V.
* PRE/ATT: PRE ON
#* RF GAIN: completely
to right
® NOTCH: OFF
* MODE: FM
# TONE: center
® PBT: center
# SOL: completely to
left
| # AGC: FAST |
$56 output OFF (dur- |
ing no signal) |
(o) Discrimi- | 2 . | Input +14 dBp non- | FM Connect OC voltmeter
nator modulated signal from | between R20 (RO side)
SG. and jumper resistor to
its left,
Note: SSG output in 2 must be zeroed-in to within 100 Hz of display frequency.
: :
FM tuning 1. | Input +14 dBp mod- FR Connect frequency 455 kHz Front panel Main dial
ulated signal fram counter to D4.
$8.
!
|
.| Verification: FM tuning LED illuminates with +1 kHz displayed frequency in adjustment 1, and ne illumination
when + 1 KHz exceeded,
FM TUNE LED Mumination FM R22
S-meter . | SSG output: +34 dBy Built-in S-meter 59 + 40 dB
FM UNIT
Check point D4
Discriminator adj. L3 — R22 FM tuning LED adj.
C aay Cle
5 18 '
te a ae
: jCheck points
Jumper resistance