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CCS Technical Documentation
RH-12/RH-28 Series Transceivers
6(a) - Baseband Troubleshooting
Instructions
Issue 1 02/04 Nokia Corporation
RH-12/RH-28
Baseband Troubleshooting Instructions CCS Technical Documentation
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Page 2 Nokia Corporation Issue 1 02/04
RH-12/RH-28
CCS Technical Documentation Baseband Troubleshooting Instructions
Table of Contents
Page No
Introduction.................................................................................................................... 5
General Failures ............................................................................................................. 6
Phone is dead ...............................................................................................................6
Flash programming doesn't work ................................................................................7
Charging Failure ..........................................................................................................8
Phone doesn't stay on, or phone is jammed ................................................................9
Display Information: "Contact Service" ....................................................................10
Function Failures.......................................................................................................... 12
Camera Failure ...........................................................................................................12
No picture................................................................................................................ 12
Viewfinder working but no picture taken when pressing select-key ...................... 14
FM-radio Failure ........................................................................................................15
Infrared Communication Failure ...............................................................................16
SIM Failure ................................................................................................................17
MMC Failure .............................................................................................................18
Bluetooth Failure .......................................................................................................19
Display Failure ...........................................................................................................20
USB Data Transmission Failure ................................................................................21
Functional Cover Failure ...........................................................................................22
Audio Failure .............................................................................................................24
Uplink or downlink failure...................................................................................... 24
Uplink missing audio signal.................................................................................... 25
Uplink weak audio signal........................................................................................ 26
Uplink distorted audio signal .................................................................................. 27
Uplink TDMA noise................................................................................................ 28
Downlink missing audio signal ............................................................................... 29
Downlink weak audio signal ................................................................................... 30
Downlink distorted audio signal ............................................................................. 31
Downlink noise in audio signal............................................................................... 32
Downlink TDMA noise........................................................................................... 33
Various noise problems........................................................................................... 34
BT audio errors........................................................................................................ 35
Vibra errors ............................................................................................................. 36
BackLight Failure ......................................................................................................37
Key Failure ................................................................................................................38
Power Key Failure................................................................................................... 38
Volume Key Failure ................................................................................................ 39
Keypad Failure ........................................................................................................ 40
Issue 1 02/04 Nokia Corporation Page 3
RH-12/RH-28
Baseband Troubleshooting Instructions CCS Technical Documentation
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Page 4 Nokia Corporation Issue 1 02/04
RH-12/RH-28
CCS Technical Documentation Baseband Troubleshooting Instructions
Introduction
This document describes in overview the different hardware error possibilities for the
RH-12/RH-28 phone.
Not every possible hardware error is described in this document, but only those possible
to correct.
Issue 1 02/04 Nokia Corporation Page 5
RH-12/RH-28
Baseband Troubleshooting Instructions CCS Technical Documentation
General Failures
Phone is dead
This means that the phone doesn't use any current at all when supply is connected and/
or power key is pressed.
It is assumed that the voltage supplied is 3,9Vdc. UEME will prevent any functionality at
battery/supply levels below 2,9Vdc and the software will shut the phone down at 3,1Vdc.
Figure 1: Phone is dead
Phone is dead
Yes
Failure in VBAT line:
Measure voltage on L260, L261,
Check X100, L260, L261, L262,
L262, L263, L264, L265 and L206. NO
L263, L264, L265, L206, C260,
Should be ~3,9V
C261, C262, C283 and pwb
Yes
Measure voltages on both sides of
Check:
R302 when power key is pressed. NO
R302, S323 (power key) and pwb
Should be ~0V.
Yes
Check:
Sleep clock on J401:
NO B200, C209, C210, D200 and
~32,768kHz, 1,8Vpp
PWB
Yes
Measure voltage on PURX =
Check:
1,8Vdc on J404 or N131 pin 3 NO
D200 and pwb
~1sec after power key is pressed.
Yes
Measure voltage on VR3=2,78Vdc Check:
NO
on C295 pin1 D200, C295 and pwb
Yes
Verify that system clock is @
Check:
~26MHz, min 300mVACpp on
C422, R420, C514, C515, L515,
C422 pin2 towards D400 (TIKU) NO
N500 (Helgo), G501 (26MHZ
with regular probe Cin ~10-13pF /
XTAL) and pwb.
10M
Yes
Check:
D400 (TIKU) and D450, D451
(Flashes) and D455 SDRAM
Page 6 Nokia Corporation Issue 1 02/04
RH-12/RH-28
CCS Technical Documentation Baseband Troubleshooting Instructions
Flash programming doesn't work
The flash programming on RH-12/RH-28 boards is only possible via the pads on the PWB.
In case of Flash failure in production (FLALI station), problem is most likely related to
SMD problems. Possible failures could be Short-circuiting of balls under