PLACE THE MAIN BOARD ON THE P637, POSITION B, AND
CONNECT IT TO THE RADIO BOARD VIA THE 4-WAY
EXTENSION LEAD. FIT A BATTERY. POWER UP THE
RADIO BOARD BY CONNECTING A LINK BETWEEN PINS 1
AND 4 ON SK2
CONNECT A SCOPE WITH A x1 PROBE TO SK101 PIN 3. IS
THERE 150-200mV 455kHz p-p?
THE PROBLEM IS THE
CONNECTOR OR ON
THE MAIN BOARD
IS THERE 150-200mV
455kHz p-p?
TRY TUNING L101 TO
PEAK SIGNAL AT
SK101 PIN 3
REMOVE SCREEN
TURN THE SIGNAL GENERATOR OFF.
PUT A x10 PROBE ON THE BASE OF
TR103
YES
NO
YES
NO
C1
C (RPR 551IS RADIO BOARD)
CONNECT A MINIATURE CO-AX FROM THE SIGNAL
GENERATOR TO SK102 PIN 1 AND 0V. APPLY AN
ON-CHANNEL SIGNAL AT -30dBm
RPR 550IS Series
TM1188 Issue 1Page 5 - 12
Figure 4: Fault-Finding Guide
(Continued)
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