Service Manual

RPU416A Level Diagram
Rx Section
SG output level for obtaining 12Db/SINAD when injected to each point Modulate the AF level with a frequency of 1kHz and deviation of 1.5kHz
through a 470pF coupling capacitor. (Narrow), 3kHz(Wide) . Then take the signal form the signal generator
Measure the 1
st
Local level on a RF VTVM. when the AF output has been adjusted to 0.63Vrms with the AF vol.
Tx Section
Measure the audio frequency on an AFVTVM and radio frequency on a RF VTVM at high impedance . Set the MIC input to obtain a modulation factor of 60%
with the transmit frequency at center and a modulation frequency of 1kHz .
ANT
L112
C145
R22 4
5R
L2 0 3 , L2 1 4
1st Local
0.1Vrms
IC200
C212
Q201
R21 0
SP
Q307
IC302
VR
IC300
-116.5dBm -113dBm -98dBm -103dBm -104dBm -106.5dBm -103dBm 1018mVrms 175mVrms 23.5mVrms 0.63Vrms
L2 0 8
RF cen te r IF 38.85MHz
AF 1kHz
Q202
R21 1
R21 7
XF200
Q203
VR501
IC500
MIC
Q4
Q6
Q100
Q101 Q102
AF VTVM RF VTVM
Q107
Q105
C114C108C106
C100
C40
D5
AN T
4W
16mVrms 430mVrms 310mVrms 0.15Vrms 0.44Vrms
0.8Vrms
0.62Vrms