Fm Radio Troubleshooting; Fig 14 Fm Radio Troubleshooting - Nokia RM-14 Rf Troubleshooting And Manual Tuning

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FM radio troubleshooting

Phoenix: Testing -> FM radio -> Power on.
FM signal: Frequency = 100 MHz, frequency deviation = 67.5 kHz, modulation fre-
quency = 1 kHz, R=L, pilot tone on and RF level -67 dBm. Signal is injected at X102
bottom connector pin 11, 12, 13 or 14.
Alternative: Use FM signal received by headset.
Measure audio voltage a) VAFL = 200 mVpp
(1 kHz) 850 mVDC (C6180, both sides
b) VAFR = 200mVpp (1 kHz) 850 mVDC
(C6182, both sides).
Measure CPOUT voltage = 0.9 V @ 100 MHz (C6162).
Measure RF level at antenna input (C6176).
18
Figure 14:FM radio troubleshooting
FM Radio Troubleshooting
NOK
OK
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
RF Troubleshooting and Manual Tuning
OK
NOK
Check 6158, R6159,
R6160, C6162
and C6157
NOK
Visual inspect C110, C111 and L1103
(all bottom side) and
C6179, C6176, C6178 and L6176
RM-14
FM Radio OK
ISSUE 1 11/04