Adjustment Procedures; Preparation - Icom IC-RX7 Service Manual Addendum

SECTION 5.

5-1 PREPARATION

¤ REQUIRED TEST EQUIPMENTS
EQUIPMENT
Frequency range
Frequency Counter Frequency accuracy : ±1 ppm or better
Sensitivity
CAUTION!: BACK UP the originally programmed memory data in the transceiver before starting adjustment.
When the adjustment is fi nished, the memory data may be cleared.
¤ ENTERING ADJUSTMENT MODE
q Connect the stereo plug ("clone–GND" connected) to the [SP] jack.
w Push and hold [Y], [Z], [8] and [SEARCH] keys, turn the power ON.
Then the function display shows the adjustment item and adjustment frequency as below.
Adjustment frequency
¤ KEY ASSIGNMENT FOR ADJUSTMENT MODE
Selects previous adjustment item
¤ QUITING ADJUSTMENT MODE
• Turn the power OFF, then push and hold [Y], [Z], [8], [CLR SQL] and [ENT MW] keys, turn the power ON.
ADJUSTMENT PROCEDURE
GRADE AND RANGE
: 0.1–30 MHz
: 100 mV or better
"CLONE" to "GND"
To [SP]
3-conductor 3.5(d) mm plug
Adjustment item
NO.
DIAL
CLR
SQL
1 2
HOLD V
4 5
SCAN
7 8
SEARCH
.
0
ATT
EQUIPMENT
Frequency range
Standard Signal Output level
Generator (SSG)
Output impedance
Adjust the value for the item
MENU
Selects next adjustment item
ENT
Stores adjustment value/Starts automatic adjustment
MW
3
6
9
SKIP
5 - 1
GRADE AND RANGE
: 0.1–1500 MHz
: 0.1 µV to 32 mV
(–127 to –17 dBm)
: 50 Ω