Nokia RM-155, 2366i Baseband Description and Troubleshooting
Nokia Customer Care
2366i (RM-155)
Mobile Terminal
Baseband Description and
Troubleshooting
Issue 2 - February 2007 Company Confidential ©2007 Nokia Corporation
2366i (RM-155)
Baseband Description and Troubleshooting Nokia Customer Care
Contents Page
Introduction ..................................................................................................................................................... 4
Baseband Components.................................................................................................................................. 5
Power-Up Sequence ...................................................................................................................................7
GPS...................................................................................................................................................................... 9
GPS Troubleshooting ..................................................................................................................................9
GPS Phoenix Interface ..............................................................................................................................11
Flip Detection................................................................................................................................................ 11
Troubleshooting .........................................................................................................................................11
USB .................................................................................................................................................................. 12
USB Troubleshooting ................................................................................................................................13
USB Phoenix Interface .............................................................................................................................14
Display ............................................................................................................................................................ 14
Display Troubleshooting ..........................................................................................................................15
Display and Keypad Backlight Troubleshooting ................................................................................16
Display Phoenix Interface .......................................................................................................................17
Display Backlight Troubleshooting .......................................................................................................17
Keypad Backlight Troubleshooting .......................................................................................................18
Audio............................................................................................................................................................... 18
Audio Troubleshooting .............................................................................................................................18
Audio Phoenix Interface ..........................................................................................................................19
System Connector........................................................................................................................................ 20
Accessory Detection .................................................................................................................................21
Flash Programming ..................................................................................................................................... 21
Flashing Tool ...............................................................................................................................................21
Flashing Phoenix Interface .....................................................................................................................21
Battery Interface Circuit............................................................................................................................ 22
Charging......................................................................................................................................................... 22
Alignment ...................................................................................................................................................... 24
AMS Baseband Calibration...................................................................................................................... 24
Final UI Check............................................................................................................................................... 25
Problems During Flash and Alignment .................................................................................................. 25
No Communication - Flash .....................................................................................................................25
No Communication - Alignment ...........................................................................................................25
Failed Self Test/Calibration .....................................................................................................................25
Other Potential Problems .......................................................................................................................... 26
Mobile Terminal Does Not Power Up ...................................................................................................26
Shutdown after 32 Seconds ...................................................................................................................26
No Audio ......................................................................................................................................................26
Keypad Malfunction .................................................................................................................................26
No LCD Display ...........................................................................................................................................26
Phoenix Tools................................................................................................................................................ 27
Local Mode ..................................................................................................................................................27
Reading the Mobile Terminal ...................................................................................................
Running the Self Test ...............................................................................................................................30
Checking the Baseband Regulator/General I/O parameters ..........................................................31
Flashing the Mobile Terminal .................................................................................................................32
Flashing - EZ-Flash................................................................................................................................ 32
..............28
Page 2 Company Confidential Issue 2 - February 2007
2366i (RM-155)
Nokia Customer Care Baseband Description and Troubleshooting
Reference ....................................................................................................................................................... 33
Signal References ......................................................................................................................................33
Issue 2 - February 2007 Company Confidential Page 3
2366i (RM-155)
Baseband Description and Troubleshooting Nokia Customer Care
Introduction
The 2366i baseband module is a tri-mode, code division multiple access (CDMA),
dual-band engine and is based on the DCT4.5 standard. The baseband engine includes
two major Application Specific Integrated Circuits (ASICs):
• D2200 Universal Energy Management Cost Reduced Integrated Circuit (UEMCR
IC), which includes the audio circuits, charge control, and voltage regulators
• D2800 Universal Phone Processor (UPP) — Main processor, which includes system
logic for CDMA, two Digital Signal Processors (DSPs), the Main Control Unit
(MCU), and the memory.
The BL-5C Li-ion battery is the main power source, with a nominal capacity of 820 mAh.
Page 4 Company Confidential Issue 2 - February 2007
2366i (RM-155)
Nokia Customer Care Baseband Description and Troubleshooting
Baseband Components
G7100
VCORE
D3000
32KHz
VFlash1
D2200
D2800
VR3
VANA
19.2MHz
VPP
FBus Tx
MBus Tx/Rx
FBus Rx
VR1A
VR1B
VIO
VSIM
Figure 1: PWB - bottom side
Issue 2 - February 2007 Company Confidential Page 5
2366i (RM-155)
Baseband Description and Troubleshooting Nokia Customer Care
Figure 2: PWB - top side
Page 6 Company Confidential Issue 2 - February 2007
2366i (RM-155)
Nokia Customer Care Baseband Description and Troubleshooting
Power-Up Sequence
When the mobile terminal is dead or jammed, check the power-up sequence of the
baseband area. Verify all regulator and reset signals are correct to ensure proper power
up of the UEMCR and the UPP integrated circuits.
Reset mode is entered and the watchdog
starts. VCORE is enabled, and provides
power to the UPP.
End of settling time (only if Vbat >Vcoff+)
VFlash1 regulator is enabled.
VR3, VANA, VIO are enabled. PURX is held
low.
UPP, MCU, and DSP are reset; PURX
releases.
Figure 3: Power-up sequence and timing
Issue 2 - February 2007 Company Confidential Page 7
2366i (RM-155)
Baseband Description and Troubleshooting Nokia Customer Care
CH1- PURX
CH2-MBUS
CH3-FBUSTX
CH4-FBUSRX
Data transfer has
started (Fbus_RX)
Figure 4: Measured power-on sequence and timing - flash programming
Page 8 Company Confidential Issue 2 - February 2007
2366i (RM-155)
Nokia Customer Care Baseband Description and Troubleshooting
GPS
The GPS turns on by using Vcore and VIO from the UEMCR IC. The GPS communicates
with the UPP using the UART interface, turning on the GPS engine’s BB integrated circuit
and RF integrated circuit. These synchronize with the mobile terminal using the 19.2
Mhz clock. The mobile terminal computes the location coordinates from signals received
from the satellites and sends them to the emergency desk.
Secondary UARD
(Diagnostic)
Figure 5: GPS Block Diagram
System Clock
19.2 MHz (CDMA)
The GPS baseband module performs the following:
• Accepts the GPS raw data from the front end
• Processes the raw data to provide the CE with location information (2 CPUs)
• Accepts commands from the CE
• Mode (sleep, idle, etc.)
• RF control commands
• GPS configuration
• Provides power for the FPS RF
GPS Troubleshooting
Check the following connections and signals (see Figure 6):
• Power source Vcore and VIO
• CLK19M2_GPS = 19.2 Mhz
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2366i (RM-155)
Baseband Description and Troubleshooting Nokia Customer Care
•VRF is enabled
• VRF_GPS =2.78 V dc
• GPS clock = 16.384 Mhz
• Use Phoenix to run Test Mode 1
• USART activity
• GPS antenna
Figure 6: RF and BB GPS integrated circuits (ICs)
• GPS_EN_RESET (1.8V)
• GPS_SLEEPCLK (32.768kHz)
Page 10 Company Confidential Issue 2 - February 2007
2366i (RM-155)
Nokia Customer Care Baseband Description and Troubleshooting
GPS Phoenix Interface
Run the GPS Quick Test in Phoenix to check the GPS BB.
CW Test fails unless CW Tone is
injected into the GPS RF Connector
Flip Detection
The Flip Detect circuit uses a Hall-effect sensor to recognize the position of the flip
cover. The sensor has an open-collector output that is pulled low when a magnetic field
of sufficient strength is present at the sensor. The sensor is located on the Baseband
PWB, and the corresponding magnet is mounted in the mechanics of the flip. See
Figure 8 for the circuit diagram.
Figure 7: Phoenix GPS Quick Test option
Figure 8: Flip detection circuit
Troubleshooting
1. Check that the components are correctly mounted and soldered.
2. Check the voltage on VFLASH1. If not present, check the UEMCR IC.
3. Check that the input to KEYB1 on the UEMCR is low.
4. Check that the magnet is correctly located with respect to the sensor.
Issue 2 - February 2007 Company Confidential Page 11
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