JVC RX-504VBK Service Manual page 35

RX-504VBK/RX-504VLBK
RX-505VTN/RX-SO5VLTN
T101 7102 —_-TC106
VR167 S YS) @>
oS No TP101
LP101
3 i
=)
OD 1105 Pe as
a
=)
LP102 T104
103
FE101
T106 7105
FRONT
1. FM section
Mi FM oscillator :
(1) Set the frequency display to "108.0MHz".
(2) Confirm the FM inter-station noise is received.
(3) Confirm the voltage of test point "TP101" becomes
8.0V+2.0V.
(4) Set the frequency display to "87.5MHz"
and confirm the voltage of test point
"TP101" becomes 0.6V~2.6V.
M@ FM detector coil : 7105, T106
(1) Connect a digital voltmeter to test point "TP102",
and receive to "100.1MHz" signal with SSG ATT 70
dB.
(2) Adjust T105 so that the digital voltmeter reads
O0+1.5mV.
(3) At the same time, Adjust T106 so that the
distortion of the output is minimised.
M@ FMseparation: VR167
(For continental Europe, Germany, Australlia
and the U.K.)
(1) Receive a stereo signal.
(2) Adjust VR 167 so that channel separation
becomes maximam.
2. MW section
Note: () — : Australlia,jthe U.K. and
Continental Europe
{} : Other coutries
Channel space 9kHz
[] :Other coutries
Channel space 10kHz
| @ MW oscillator : T103
(1) Set the frequency display to (522kHz) {531kHz}
[530kHz] and confirm the voltage of test point
TP101 becomes 0.9V+0.2V.
(2) Set the frequency display to (1629kHz) {1602kHz}
{1600kHz] and confirm the voltage of test point
TP101 becomes (7.5V £0.8V) {7.2V £0.7V}
(7.2£0.7V].
(3) If its voltage exceeds the allowance, adjust T103 to
obtain the voltage.
M MW antenna coil : T101
(1) Connect a loop antenna to the "AM Loop" terminal
on the rear panel.
(2) Adjust T101 to obtain the best receiving sensitivity
on 600KHz or 608kHz.
MMW antenna trimmer : TC105
(1) Adjust TC105 to obtain the best receiving
sensitivity on 1400kHz or 1404kHz.
LW section (for RX-504VLBK,505VLTN)
Note:[ ] for Italy
B LW oscillation :1104
(1) Set the frequency display to 144kHz and adjust T104
so that the voltage of TP10i becomes
0.8£0.4V[(0.8V £0.1V].
(2) Set the frequency display to 353kHz [290kHz] and
confirm the voltge of test point TP101 becomes
7.7V £0.6V [5.7V £0.5].
@ LW antenna coil : T102
(1) Connect a loop antenna to the "AM Loop" terminal on
the rear panel.
(2) Adjust T102 to obtain the best receiving sensitivity on
164kHz [164kHz].
Bi LW antennatrimmer : TC106
(1) Adjust TC106 to obtain the best receiving sensitivity
on 353kHz [245kHz).
(No.20220) 1-35