Icom IC-R8500 - Section 5 Adjustment Procedures; 5-2 Power Supply Voltage and PLL Adjustment

SECTION 5
ADJUSTMENT PROCEDURES
5-1
METER REFERENCE ADJUSTMENT
NOTE:
This adjustment 1$
not necessary unless the CPU or EEPROM ICs are replaced. The set data would not be cleared by CPU resetting.
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITIONS DOT MATRIX DISPLAY OPERATION
ENTERING
ADJUSTMENT
SET MODE
•
Connect
a
terminator to the [REMOTE]
connector on the
rear panel.
•
While
pushing
the [M-CH] and
[ENT]
dutches, turn power ON.
Push 0123
Push
[0]
to
enter meter
reference
set
mode;
use
[M-CH] /[ENT]
switch
to
select item.
METER
INDICATION
1
•
Set the
meter indication to
"S3"
with
^e
(DIAL).
Push
[M-CHJ.
2
•
Set
the
meter indication to
“S5"
with the
[DIAL].
SET
S5
•
Push
[M-CH],
3
•
Set
the
meter indication to
"S7"
with
the
[DIAL],
SET
S7
Push [M-CH].
1
•
Set the meter indication to "S9" with the
[DIAL].
1
SET S9
Push [M-CH].
5
Set the
meter
Indication to “S9+20" with
the [DIAL].
SET
S9+20
Push [M-CH].
6
Set the
meter indication to
’S9+40"
with
the [DIAL].
SET S9+40
Push
(M-CHJ.
1
•
Set
the meter indication
to
"S9<fS0'* with
the [DIAL].
SET S9+60
Push
(M-CHJ.
5-2
POWER SUPPLY VOLTAGE AND PLL ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITIONS
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT LOCATION UNIT ADJUST
POWER
SUPPLY
VOLTAGE
•
Connect an AO-55 to the (DC IN].
•
Displayed freq. : 1100.000 MHz
•
Mode
: Any
•
Receiving
MAIN Connect
a
voltmeter to
Jl5pin 2.
12.5V
MAIN
R280
REFERENCE
FREQUENCY
1
•
Displayed freq.
: Any
•
Mode
:
Any
PLL Connect
a
Irequency
counter
to P5.
15.100000 MHz
PLL
The trimmer
capacitor
of
XI
2 Connect an RF volt-
meter
(50 Q
im-
pedance) to P5.
2 dBm ±3 dB Verify
6-1