Table of Contents
Advertisement
ICF-M88B
0 dB=1 µV
[AM]
Setting:
Function: RADIO
BAND: AM
Put the lead-wire
AM RF signal
antenna close to
generator
the set.
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
[FM]
Setting:
Function: RADIO
BAND: FM
MAIN board
FM RF signal
TP13 (FM IN)
generator
0.01 µ F
22.5 kHz frequency
deviation by 400 Hz
MAIN board
signal
TP10 (RF GND)
Output level:
as low as possible
MAIN board
TP9 (VT)
TP8 (GND)
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be finally done by the trimmer
capacitors.
• Remove FM antenna in FM adjustment.
8
SECTION 5
ELECTRICAL ADJUSTMENTS
MAIN board
TP12 (SP OUT)
level meter
8 Ω
+
set
–
MAIN board
TP15 (AF GND)
MAIN board
TP12 (SP OUT)
level meter
8 Ω
+
set
–
MAIN board
TP15 (AF GND)
digital voltmeter
100 k Ω
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
L1
530 kHz
Confirmation
1,710 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
ANT1
CT1
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Confirmation
108.0 MHz
Confirmation
87.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2
CT2
Adjustment Location: MAIN board (See page 9)
450 kHz
Reading on Digital Voltmeter
1.2 ± 0.1 V
7.2 ± 0.5 V
590 kHz
1,490 kHz
Reading on Digital Voltmeter
8.9 ± 1.0 V
2.3 ± 0.5 V
87.5 MHz
108.0 MHz
Advertisement
Table of Contents
