User Guide
Table Of Contents
- Amendment Record Sheet
- Copyright
- Warnings and cautions
- For your safety
- Care and maintenance
- ESD protection
- Battery information
- Company Policy
- Nokia 1680c; Nokia 1681c Service Manual Structure
- 1 General Information
- 2 Service Tools and Service Concepts
- 3 Baseband Troubleshooting Instructions
- General baseband troubleshooting
- SIM related faults
- User interface
- Audio troubleshooting
- Audio troubleshooting using phoenix
- Check microphone using "Hp microphone in Ext speaker out" loop
- Check earpiece using "Ext microphone in Hp speaker out" loop
- Check IHF & ringing tone function using "Buzzer"
- Check vibra function using "Vibra control"
- Earpiece fault
- IHF/ringing tone fault
- Microphone fault
- Headset earpiece fault
- Headset microphone fault
- 4 RF Troubleshooting Instructions
- 5 Camera Module Troubleshooting (Only for RM-394/RM-395)
- 6 System Module
- Glossary
Signal
name
From To Para-meter Input characteristics Function
Min Typ Max Unit
TXP2 UPP RF-IC 1 1.38 1.88 V Depends of
the RF design
(GenIO6
)
0 0 0.4 V
Load
Resistance
10 kW
Load
Capacitanc
e
20 pF
Timing
Accuracy
¼ symbo
l
RFBusEn1
X
UPP RF-IC 1 1.38 1.88 V RFIC Chip SelX
0 0 0.4 V
Internal PU
Current
50 uA
Load
resistance
10 kW
Load
capacitanc
e
20 pF
RFBusDa UPP /
RF-IC
RF-
IC/
UPP
1 1.38 1.88 V Bi-directional
RF Control
serial bus
data,
0 0 0.4 V
Load
resistance
10 kW
Load
capacitanc
e
20 pF
Data
frequency
13 MHz
RFBusClk UPP RF IC 1 1.38 1.88 V RF Control
serial bus bit
clock
0 0 0.4 V
Load
resistance
10 kW
Load
capacitanc
e
20 pF
Data
frequency
13 MHz
RM-394; RM-395; RH-118
System Module
Issue 1 COMPANY CONFIDENTIAL Page 6 –11
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