JVC RC-W410 - Tuner Band Calibration and Tracking

RC-W410 B/E/G/GI/V/VX
® Routine of Check and Adjustment
no] tem Check Point “Peto Adjustment, Confirmation
osition
AM IF adjustment RADIO/AM In reception of 1404kHz signal, adjust
Since
the
AM
IF
circuit
T2
for
the
best
sensitivity.
of this model is non-
adjusting subject, do
not disturb or adjust T2
unless it needs to be
adjusted after repair.
2 | FM IF adjustment Input: Ti Tune to a fre- | 1) Remove L7 once to obtain single-peak
Hot side: Connect quency near waveform, and adjust T1 to maximize
Since the FM IF circuit
at ahie biel ie none aclip to 1C1 by 108 MHz not 10.7 MHz signal level.
adjusting subject, do clipping it. L7 to receive any | 2) After the adjustment, set and connect
not disturb or adjust T1 Output (dis- input signal. L7 as it was.
unless it needs to be criminated)
adjusted after repair. Hot side : TPS
Grounding side:
VR1
qT £8 5
M TPG
C41
pg [IC 2} 12
ie
ie]
C35 t
TP7
TP7
LW RF Tracking adjust- | Input through RADIO/LW 1) Receive 144 kHz signal.
ment Standard loop L4 2) Adjust L4 to obtain 1.3 V + 0.05 V as
antenna output level at TP3.
Output at TP3 L3 3) In reception of 144kHz signal adjust
L4 TPS
L3 to obtain maximum output level.
S)
W he , TC3 4) Receiving 290 kHz signal, adjust TC3
to obtain maximum output level.
L3, TC3 5) Alternately repeat the above steps 3)
and 4) to obtain maximum outputs
respectively.
RADIO/AM
1) Receive 522 kHz signal.
2) Adjust L6 to obtain 1.2 V + 0.05 V as
output level at TP3.
3) In reception of 603 kHz signal adjust
L5 to obtain maximum output level.
4) Receiving 1404 kHz signal, adjust TC5
to obtain maximum output level.
5) Alternately repeat the above steps 3)
and 4) to obtain maximum outputs
respectively.
4 |MWPRF Tracking adjust- | Input through
ment Standard loop
antenna
Output at TP3
12 (No. 1768)