Nominal Current Consumption - Nokia NHL-2NA Series Troubleshooting Instructions

NHL-2NA
• Check that board-to-board connector, hotbar and adapter connections are OK,
and connectors make good contacts.
• If liquid damage, stop repairing!
If some module (eg. Camera, display, grip) is not working:
• Try working module
If this not helping
• Check supply voltages for failed module
• Check clock(s) for failed module
=> Go to relevant chapter of this document
Flash phone before disassembling it if fault is not obvious and Phoenix connection is
OK.
Dissasemble phone:
Try to locate failed module, is it LG4, LS4, UI or camera module.
• Check failed module visually:
Mechanical damages?
Solder joints OK?
Continue with specific troubleshooting procedure for the module:
• If there is an obvious fault, repair it before reflashing the device
• Flash first if a fault is not obvious
If flashing is not working go to flashing troubleshooting
Due to CSP packages short circuits or broken solder joints are not easily seen. If the
examined signal seems to be continuously in low or high level, then measure for possible
short circuit to ground (signal low) or to supply voltage (signal high) Note that if a prob-
lem is not found from any visible contact/component it can be under CSPs where the sig-
nal is connected.
Care must be taken when assembling and disassembling the tranceiver. Failure to do this
may result in unnecessary damage to device.
NOTE! if some ASIC is changed see chapter Bluetooth troubleshooting

Nominal current consumption

NOTE: Service tools need some amount of current to work. (FLA-21: 1-2mA and MJF-9Q:
2-6mA
Page 2 ¤Nokia Corporation
CCS Technical Documentation
Issue 1 07/02