Nokia 6150 Service & Repair Hints page 38

No RX (no rx calibration...RSSI reading highest value)
N600 SUMMA faulty / poor soldering
•
check the UHF- and VHF oscillator frequency
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check the control-lines for the PLL, pin 5, 6, 7 from N600
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check the UHF-VC on pin 21 N600 1,9V-3.2V depending of the channel
•
check the VHF-VC on pin 12 N600 2,6V
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check the 5V VCP supply voltage drop over R606 (normal 0,2V)
•
change the N600 SUMMA
Figure 14: PLL-SCKL Signal
Figure 15:PLL-SDAT Signal
Figure 16:PLL-SENA Signal
version 1.0 / 19.10.1999
CONFIDENTIAL
(see the diagrams below)
Service & Analysis Center Europe
Training Team
Page 38 of 41