Icom IC-4008A - Warranty Information; Warranty Service Instructions

5 - 2
5-2 ADJUSTMENT
REFERENCE
FREQUENCY
OUTPUT
POWER
FM
DEVIATION
SQUELCH
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
433.925000 MHz
9 mW [ITA/–1]
470 mW [CSA/–1]
±4.8 kHz
10 mV ±3 dB
Audio signal
disappears.
1
1
1
2
1
2
• Operating channel : Ch 35
• Transmitting
• Operating channel : Ch 35
• Transmitting
• Operating channel : Ch 01
• Connect an audio generator to the
[MIC] jack and set as:
1 kHz/100 mV rms
• Set an FM deviation meter as:
HPF : OFF
LPF : 20 kHz or 15 kHz
De-emphasis : OFF
Detector : (P–P)/2
• Set group No. : 01
• Transmitting
• Set group No. : OFF (– –)
• Set an audio generator output level
until the deviation is ±3.5 kHz.
• Transmitting
• Operating channel : Ch 35
• Connect an SSG to J1 on the RF unit
and set as:
Level : 0.14 µV*
(–124 dBm)
Modulation : OFF
• Receiving
• Set an SSG as :
Level : OFF
• Receiving
Top
panel
RF
RF
Front
panel
Loosely couple a fre-
quency counter to the
antenna.
Connect an RF power
meter to the RF test
port J1.
Connect an FM devia-
tion meter to the RF
test port J1.
Internal speaker
RF
RF
RF
Front
panel
C63
R206
R50
Verify
Push
and hold
[MODE]
and
[DOWN]
Verify