RM-127
4 - Service Tools and Service ConceptsNokia Customer Care
Service Tools
■ List of service tools
The table below gives a short overview of service tools that can be used for testing, erro r analysis and repair of product RM-127, refer to various set-ups.
10pcs 2A fuse for MJ-22 module jig
10pcs Test pins for MJ-22 module jig
10pcs Test pins for MJ-22 module jig
1pc Wing screw M3x20 for MJ-22 module jig
10pcs Test pins for SF-17 POS flash adaptor
10pcs Flash interface pins for DA-61 docking station adaptor
10pcs SIM interface pins for DA-61 docking station adaptor
RM-127
4 - Service Tools and Service ConceptsNokia Customer Care
■ JVB-1 docking station with DA-61 docking station adapter
The JVB-1 docking station has been designed for calibration and software update use. The DA61 docking station adapter makes signal connections to the phone. JVB-1 and DA-61 are used
as one unit.
JVB-1 main electrical functions include the following:
•adjustable VBATT calibration voltage, current measurement limit voltage
“VCHAR”, current measurement calibration “ICHAR”
•adjustable ADC calibration voltage via BTEMP and BSI signal
•BTEMP and BSI calibration resistor
•signals from FBUS to the phone via parallel jig
•control via FBUS or USB
•Flash OK/FAIL indication
In calibration mode JVB-1 is powered by external power supply 11-16V DC. In flashing power
for the phone can be taken from FPS-8 or external power supply 11-16V DC.
Nokia Customer Care4 - Service Tools and Service Concepts
■ DA-61 docking station adapter
Docking station adapter DA-61 with special white adapter is designed for assembled RM-127
phones. The docking station adapter supports testing, flashing, energy management calibration. If used in conjunction with the RF-coupler SA-25, also RF function testing is possible.
Features include:
•compatible for JBV-1
•easy phone attachment and detachment
•reliable phone locking
•switch for reliable detection of phone attachment
•replaceable test pins
•internal SIM holder with interface to phone SIM reader
RM-127
4 - Service Tools and Service ConceptsNokia Customer Care
■ SA-25 antenna coupler
RF antenna coupler for use with the docking station adapter (DA-61).
Extends the docking station adapter to allow RF function tests in GSM bands 850, 900, 1800
and 1900 MHz.
Features include:
•easy attachment to DA-61 without use of tools
•reliable RF connection to phone module under test
•low attenuation and small “ripple” over the width of each GSM band
RM-127
4 - Service Tools and Service ConceptsNokia Customer Care
Remove the four screws fixing the PWB by using Torx T6 screw driver. These screws are too
short, therefore four longer screws are delivered together with the coupler.
RM-127
4 - Service Tools and Service ConceptsNokia Customer Care
■ SF-17 CCS POS flash adapter
Point of sales flash adapter for RM-127 phones.
SF-17 establishes a simple environment for SW update purposes and connects to the same
flash test pattern and the phone battery contacts.
Features include:
•flashing and testing of the attached phone
•overvoltage and reverse polarity protection of adapter and attached phone
•green LED: power supply valid and attached to the phone (3.5V<Vcc<7V)
•red LED: overvoltage condition, phone power supply disconnected (Vcc>7V)
•shielded 10-pin Western connector towards flash equipment or PC
•3mm DC-jack for phone and adapter power supply
•phone battery contacts (VCC, GND, BSI)
•flash test pattern pins
View of SF-17
Spare parts
There are no serviceable parts inside SF-17, and SF-17 is not de signed for disassembly. Only
serviceable part are the spring loaded test pins that can be replaced without soldering and disassembly. Used test pin type is SX-1-J-2.0-G from manufacturer IDI.
Bent pins can be extracted from adapter’s receptacle using a tool. T o rn off pins can be replaced
using a slowly spinning 0.8 mm. For more detail, please refer to th e Service Tool Troubleshooting section.