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Nokia 616 Service Manual: Fault Finding Chart For Gsm1800 Transmitter

Carkit phone (tfe-4/rv-1).
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Fault finding chart for GSM1800 transmitter

Use Phoenix to select
TX_Data Type: "1" or "0"
TX Power Level: 5
Yes
Oscilloscope
R612
C627
C717
C623
C605
Yes
Oscilloscope
C715
C715
C716
C716
Yes
Oscilloscope
C702
C701
C703
C803
Yes
Spectrum analyzer
R819 in
Yes
Use Phoenix to select
TX_Data Type: Random
TX Power Level: 5
Yes
Spectrum analyzer
L801 B1_in
(PA N801
Pout_DCS)
Power = +22 dBm, 1747.8 MHz
Yes
Spectrum analyzer
RF-connector
Pout = +20 dBm, 1747.8 MHz
Yes
DCS TX
OK
Issue 2.0 Mar/2005
Company Confidential
VREF01
Vdc =
VR2
Vdc =
TXP
V =
VR5
Vdc =
VR3
Vdc =
TXIOUTP
Vac = 0.4 Vpp, Vdc = 1.1 V
TXIOUTN
Vac = 0.4 Vpp, Vdc = 1.1 V
TXQOUTP
Vac = 0.4 Vpp, Vdc = 1.1 V
TXQOUTN
Vac = 0.4 Vpp, Vdc = 1.1 V
CONT1
Vdc = 2.78 Volt
CONT2
Vdc = 0 Volt
CONT3
Vdc = 0 Volt
VBD
Vdc = 2.78 Volt
TX_1800
P>= -3 dBm, 1747.8 MHz
Check PA N801
Check Power Loop
No
L801,V801
Check TXC
Check
No
Directional Coupler (L801)
Antenna Switch (Z601)
Copyright © 2005 Nokia Corporation.
Company Confidential
TF4 Technical Information
A
1.35 Volt
2.78 Volt
No
1.8 Volt
2.78 Volt
2.78 Volt
A
67kHz
No
67kHz
67kHz
67kHz
A
No
A
No
A
A
A
A
TFE-4/RV-1
Check
Base Band
Check
Base Band
Check:
Mjoelner Serial
Interface
Mjoelner
Check
DCS Balun T701
Mjoelner
Synthesizer
Page 8b-59

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