Nokia 500 Service Manual page 35

RM-750
Service Tools and Service Concepts
Issue 1
JXS-1
Because the WCDMA network disturbs the RX side testing of the WCDMA
phone and the Tx signal of the WCDMA phone can severely disturb the
WCDMA network, a shield box is needed in all testing, tuning and fault
finding which requires WCDMA RF signal.
The shield box is not an active device, it contains only passive filtering
components for RF attenuation.
MJ-300
Module jig MJ-300 is designed for regional Central Services for engine
testing. It can be used for flashing via USB and RF, battery and system
testing.
The main functions are:
• Powering with external power
• CU-4 interface adapter to phone (requires SS-227)
• WLAN/BT/GPS RF-interfaces with probes
• GSM/WCDMA RF-interfaces with probes
• BSI mode selector (Tabby and Lynx interface, selected with battery
cable)
• VBATT interface (Tabby and Lynx interface, selected with battery
cable)
• CA-158RS cable is used together with this jig for RF testing
VBATT functions can be performed in the CU-4 (requires SS-227).
Calibration voltages and currents e.g. are protected and monitored by
the CU-4 interface software (protection for over-current, overvoltage
and reverse voltage).
VBATT can be powered through MJ-300 (SS-227 not required) with
external power. MJ-300 provides the VBATT with SMPS regulation to
3.9V/2A and regulation bypass with overvoltage protection (trip point
~4.4VDC). The VBATT external supply is provided with overvoltage
protection (trip point ~16.5VDC), polarity protection and over-current
protection (fuse 2.5A slow).
PK-1
PK-1 is a hardware protection key with a USB interface. It has the same
functionality as the PKD-1 series dongle.
PK-1 is meant for use with a PC that does not have a series interface.
To use this USB dongle for security service functions please register
the dongle in the same way as the PKD-1 series dongle.
COMPANY CONFIDENTIAL
Copyright © 2011 Nokia. All rights reserved.
RF shield box
Module jig
Software protection
key
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