Nokia 6560 Service Manual 7rh25bbnew

CCS Technical Documentation

RH-25 Series Transceivers

Troubleshooting - Baseband

RH-25

Troubleshooting - Baseband CCS Technical Documentation

Page No

Baseband Top-Level Description................................................................................... 4

Baseband Block Diagram ............................................................................................4

Environmental Specifications ......................................................................................5

Normal and Extreme Voltages.................................................................................. 5

Temperature Conditions............................................................................................ 5

Humidity.................................................................................................................... 5

Frequencies in Baseband .............................................................................................5

Infrared Interface (IrDA) .............................................................................................6

Energy Management ....................................................................................................6

Power Supply Modes ................................................................................................ 6

Battery BLD-3........................................................................................................... 7

Power Distribution .................................................................................................... 8

DC Characteristics .......................................................................................................9

Audio Circuitry ..........................................................................................................10

Audio Block Diagram ................................................................................................11

Earpiece................................................................................................................... 11

Microphones............................................................................................................ 11

Integrated Hands-free (IHF).................................................................................... 12

Audio Accessory Receive Path ............................................................................... 12

Audio Control Signals............................................................................................. 12

Acoustics ....................................................................................................................12

Earpiece Acoustic.................................................................................................... 12

IHF Speaker Acoustics............................................................................................ 12

Microphone Acoustics............................................................................................. 13

Vibra Motor............................................................................................................. 13

Audio Modes .............................................................................................................13

Handportable Mode................................................................................................. 13

Integrated Hands-free Audio Mode......................................................................... 14

Headset Audio Mode............................................................................................... 14

Loop set Audio Mode.............................................................................................. 15

External Hands-free Audio Mode........................................................................... 15

System Connector Interface......................................................................................... 15

System Connector ......................................................................................................15

Accessory Control Interface (ACI) ............................................................................16

Signal flow on ACI line - ACI-ASIC accessory inserted........................................ 17

Signal flow on ACI line - Non ACI-ASIC accessory inserted................................ 18

FBUS....................................................................................................................... 18

VOUT (Accessory Voltage Regulator)................................................................... 19

HookInt ......................................................................................................................20

Charging ....................................................................................................................20

DC-Plug................................................................................................................... 20

VCHAR Pins of System Connector........................................................................ 20

Voltages and Currents ................................................................................................22

Main Troubleshooting Diagram ................................................................................23

Phone is Dead ............................................................................................................25

Flash Programming Fault .........................................................................................26

RH-25

CCS Technical Documentation Troubleshooting - Baseband

Flash Programming Does Not Work .........................................................................27

Phone is Jammed .......................................................................................................30

Charger Faults ............................................................................................................32

Audio Faults ...............................................................................................................33

Keypad Fault ..............................................................................................................34

Display Fault ..............................................................................................................36

Accessory Faults ........................................................................................................37

Illumination Faults .....................................................................................................38

IrDa Fault ...................................................................................................................39

RH-25

Troubleshooting - Baseband CCS Technical Documentation

Baseband Top-Level Description

RH-25 is a handportable dual band TDMA and AMPS DCT-4 generation phone for the smart classic segment.

The RH-25 Baseband consists of the DCT4 common Baseband chipset having some product-specific blocks of its own, such as pop-port system connector (also unofficially known as "Tomahawk"), IHF, IrDA, and a color display.

The Baseband engine consists basically of two major ASICs:

• Universal Energy Management IC (UEM), including the analog audio circuits, the charge control, and the voltage regulators.

• Universal Phone Processor (UPP), containing DSP, MCU, and some internal memory.

Baseband Block Diagram

The system block diagram below shows the main BB functional blocks.

Figure 1: Baseband block diagram

RH-25

CCS Technical Documentation Troubleshooting - Baseband

Environmental Specifications

Normal and Extreme Voltages

Following voltages are assumed as normal and extreme voltages for the BLD-3 battery used in RH-25:

• Nominal voltage: 3.6 V

• Lower extreme voltage: 3.1 V

• Higher extreme voltage (fast charging): 4.4 V

Temperature Conditions

Operational temperature range (all specifications met within this range)

-10°C..+55°C

Functional temperature range (Reduced performance) -30°C..+70°C

Storage temperature range: -30°C..+85°C

Humidity

Relative humidity range is 5...95%.

The Baseband module is not protected against water. Condensed or splashed water may cause interim or permanent phone malfunction.

Submergence of the phone in water will likely cause permanent damage to the phone.

Frequencies in Baseband

There are several clock frequencies at the baseband part. The following table lists all available frequencies. The asynchronous and diagnostic busses are not included.

Frequency Context UPP UEM Flash Comments

54 MHz Memory clock X X

19.44 MHz RF clock X

13MHz DBUS, RFBusClk X X

Up to 1MHz RFConvClk X X

Table 1: Frequency List

1.08MHz CBUS Clock X X AMPS mode: 1.25MHz

32kHz Sleep Clock X

1.2kHz ACI X X

1.625MHz up to 6.5MHz

Display IF X Frequency depends on

RH-25

Troubleshooting - Baseband CCS Technical Documentation

Infrared Interface (IrDA)

RH-25 supports data connectivity via an infrared link. An IR module is integrated into the phone, connected to the IR interface of the UPP ASIC.

Energy Management

The energy management of RH-25 is based on BB 4.0 architecture. A semi-fixed battery (BLD-3) supplies power primarily to UEM ASIC and the RF PA. UEM includes several regulators to supply RF and baseband. It provides the energy management including power up/down procedure.

Power Supply Modes

The functional behavior of the UEM can be divided into seven different states. Since the UEM controls the regulated power distribution of the phone, each of these states affects the general functionality of the phone:

•No supply

• Backup

•Power off

• Reset

•Power on

• Sleep

•Protection

The different states of the UEM are detailed in the sections below.

No Supply

In the NO_SUPPLY mode, the UEM has no supply voltage (VBAT < V V_BU tery are either disconnected or both discharged to a low voltage level.

The UEM will recover from NO_SUPPLY into RESET mode if the VBAT voltage level rises above the V

Backup

In BACK_UP mode the main battery is either disconnected or has a low voltage level (VBAT < V

and VBACK <

MSTR

). This mode is due to the fact that both the main battery and the backup bat-

COFF-

level by either reconnecting the main battery or charge it to such level.

MSTR+

and VBACK > V_BU

MSTR-

COFF+

The regulator VRTC that supplies the real-time clock is disabled in BACK_UP mode. Instead the unregulated backup battery voltage VBACK supplies the output of the VRTC. All other regulators are disabled and the phone has no functionality.

The UEM will recover from BACK_UP mode into RESET mode if VBAT rises above V

MSTR+

Power Off

In order for the UEM to be in PWR_OFF mode, it must have supply voltage (VBAT > V

MSTR+

RH-25

CCS Technical Documentation Troubleshooting - Baseband

The regulator VRTC regulator is enabled and supplying the RTC within the UEM. The UEM will enter RESET mode after a 20 ms delay whenever one of the below listed conditions is logically true:

• The power button is activated

• Charger connection is detected

• RTC alarm is detected

The UEM will enter PWR_OFF from all other modes except NO_SUPPLY and BACK_UP if the internal watchdog elapses.

Reset

When the UEM enters RESET mode from PWR_OFF mode, the watchdog is enabled. If the VBAT fails to rise above the power-up voltage level V

(3.1 V) before the watchdog

COFF+

elapses, the UEM will enter PWR_OFF mode. Otherwise, after a 200 ms delay, the regulator VFLASH1 will be enabled and after an additional delay of 500 µs, the regulators VANA, VIO, VCORE, and VR3 will be enabled. All other regulators( i.e., VFLASH2, VSIM, VR1, VR2, and VR4 - VR7) are software controlled and disabled by default. After an additional delay of 20 ms, the UEM enters PWR_ON mode.

Power On

In PWR_ON, the UEM is fully functional in the sense that all internal circuits are powered up or can be by means of software. The UEM will enter PWR_OFF mode if VBAT drops below V

enter PWR_OFF mode if either of the watchdogs Operational State Machine (approx. 100 µs), Security (32 sec.), or Power Key (4 sec.) elapses or if any of the regulators trigger the thermal protection circuitry

Sleep

The UEM can be forced into SLEEP mode by the UPP by setting the input SLEEPX low for more than 60 µs. This state is entered when the external UPP activity is low (phone in sleep) and thereby lowering the internal current consumption of the UEM. The regulator VANA is disabled and VR1 - VR7 are either disabled or in low quiescent mode.

From SLEEP the UEM enters PWR_ON if SLEEPX goes high, PWR_OFF mode if watchdog elapses or BACK_UP mode if VBAT drops below V

Protection Mode

The UEM has two separate protection limits for over temperature conditions: one for the charging switch and one for the regulators. The temperature circuitry measures the onchip temperature. In case of charging over temperature, the circuit turns the charging switch off. In case of over temperature in any of the regulators, the UEM powers off.

for a period of time longer than 5 µs. The UEM will furthermore

COOF-

MSTR-

Battery BLD-3

RH-25 uses the BLD-3 Li-ion battery with a capacity of 780mAh. BLD-3 is a case-less battery; the main advantage of a case-less battery type is the overall size, particularly the thickness and the number of contact terminals.

RH-25

Troubleshooting - Baseband CCS Technical Documentation

BLD-3 has a four-pin connector. BSI resistor value is 75Kohm.

Power Distribution

Under normal conditions, the battery powers the baseband module. Individual regulators located within the UEM regulate the battery voltage VBAT. These regulators supply the different parts of the phone. Eight regulators are dedicated to the RF module of the phone, and six to the baseband module.

The regulator VCORE is likewise adjustable and controlled by registers written by the MCU. VCORE supplies the core of the UPP and can be adjusted on the fly by the MCU if DSP capacity is inadequate. Higher VCORE supply (1.8 V) results in faster core operations in the UPP.

Regulators VANA, VFLASH1, and VIO are solely controlled by the UEM and cannot be enabled or disabled by the MCU. Furthermore, VFLASH1 and VIO are both ON, though in low quiescent mode when phone is in sleep mode. An output current of 500 µA can be drawn from the regulators. VIO supplies the UPP, FLASH and LCD, VFLASH1 supplies LCD and the IrDA module. VANA is supplying analog parts internally in the UEM as well as the baseband audio circuitry and pull-up resistors on the input of the UEM slow AD converters.

System connector provides a voltage to supply accessories. The white LED's need a higher voltage supply as the battery can provide in bad condition. Separate external regulators supply both consumers.

The regulators VR1A, VR1B, VR2 - VR7 and IPA1 - IPA4 are controlled by the DSP via the DBus. VR4 - VR7 are controlled by the UEM as well and are disabled in sleep regardless of DSP writings.

VBAT/VBATTRF is furthermore distributed, unregulated, to the RF power amplifier, audio power amplifier and external baseband regulators.

The CHACON module in the UEM controls the charging of the main battery. Furthermore it contains a 3.2 Vdc regulator for charging of the backup battery and a 1.8 Vdc regulator supplying the internal real time clock.

RH-25

CCS Technical Documentation Troubleshooting - Baseband

Baseband

UEM

RF Regulators

VR1A VR1B

VR2-7

SIM

VSIM

Battery

BAT

LED regulator

ACC regulator

PA Supply

VCORE

Baseband Regulators

RTC

CHACON

VOUT

Tomahawk System Connector

VANA

VIO

VFLASH1

VFLASH2

Figure 2: Baseband power distribution

IHF PA

UPP

FLASH

LCD

Backup

battery

LED

Keyboard/display

IRDA

DC Characteristics

The following table reflects the specifications of voltage and current regulators within the UEM:

Regulator Target

VR1A RF 4.6 4.75 4.9 0 10

VR2

VR3 RF 2.70 2.78 2.86 0.1 20

VR4 RF 2.70 2.78 2.86 0.1 50

VR5, VR6

VR7 RF 2.70 2.78 2.86 0.1 45

VrefRF01 RF 1.334 1.35 1.366 - 0.1

Table 2: UEM regulator outputs

Output Voltage (V) Output Current

(mA)

Min Typ Max Min Max

RF 2.70 2.78 2.86 0.1 100

0.1

RF 2.70 2.78 2.86 0.1 50

0.1

RH-25

Troubleshooting - Baseband CCS Technical Documentation

Output Voltage (V) Output Current

Regulator Target

Min Typ Max Min Max

VIO

VSIM

VANA BB 2.70 2.78 2.86 0.005 80

VCORE

VFLASH1 BB 2.70 2.78 2.86 0.005

VFLASH2

BB 1.72 1.8 1.88 0.005

BB 1.745

2.91

BB 1.000

1.235

1.425

1.710

0.974

1.215

1.410

1.692

BB 2.70 2.78 2.86 0.005 40

1.8

3.0

1.053

1.3

1.5

1.8

1.053

1.3

1.5

1.8

1.855

3.09

1.106

1.365

1.575

1.890

1.132

1.365

1.575

1.890

0.005

85 100 120

0.005

(mA)

150

0.500

85 100 120

200 200 200 200

1.5

1 The second current value indicates the maximum possible output current of the

regulator when in low quiescent mode.

2 The output voltages are split into two different current categories. The upper part

is the lower range of output current, and the lower part is the higher range of output current.

3 Condition in sleep-mode depends on MCU writings to UEM regulator register

solely.

4 Condition in sleep-mode depends on DSP writings to UEM register.

When the accessory regulator, N100, is active, it will turn Vout ON (2.8V) and provide 70mA current.

Audio Circuitry

This section describes the audio-HW inside the Baseband. (External audio components and acoustics are not considered with the details in this section.)

The main topology comes from other phones using BB4.0 engine, where the audio-HW is mostly integrated into the UEM-ASIC. The biggest difference is that RH-25 has integrated hands-free (IHF).

RH-25

CCS Technical Documentation Troubleshooting - Baseband

Audio Block Diagram

Earpiece

RH-25 uses an earpiece, which is also referred to as a PICO speaker. This is a 32 ohm speaker with the diameter of 8 mm.

Earpiece is fed by the differential signals EARP and EARN from UEM. The signals run quite directly from UEM to the earpiece, only some passive ands EMC protection components are needed

The external earpiece signals are fed by the HF and HFCM pins.

The level (swing) of earpiece-signals can be adjusted by register values inside UEM. These signals have a common voltage level of 1.35 V (0.8 V for HF) at UEM pins.

Microphones

An EMC-improved type of microphone is used as internal microphone in RH-25, diameter of which is 2.2mm.

Internal microphone circuitry is driven single-ended. Microphone needs bias voltage, which is provided by UEM and is fed through a resistor to the microphone. A resistor is also needed to the other side of the microphone, (i.e., between microphone and GND), in order to provide the differential signals to UEM. Audio signals are AC-coupled from the microphone.

Figure 3: Audio block diagram

RH-25

Troubleshooting - Baseband CCS Technical Documentation

For the external microphone a differential input is used.

MIC1N and MIC1P (audio signals) and MICB1 (bias voltage) are used for the internal microphone. MIC2N and MIC2P and MICB2 are used for external microphone.

Integrated Hands-free (IHF)

The speaker used for IHF is a 16 mm diameter speaker with 8 Ohm impedance, also known as a MALT speaker.

IHF circuitry uses differential outputs from UEM.

Depending on the audio mode, the IHF amplifier is driven either from UEM HF / HFCM or XEAR audio outputs. The IHF audio power amplifier (APA) LM4855 has a bridge-tied-load (BTL) output in order to get the maximum use of supply voltage. The supply voltage for driving circuitry of speaker is VBAT, thus the swing across the speaker is (VBAT.

The shutdown of the IHF PA is controlled by UPP using GENIO14.

Audio Accessory Receive Path

In RH-25, the accessory receive path is directly driven from UEM HF / HFCM differential audio outputs, the output signal complies with the Pop-port accessory interface.

For EMC protection, ferrites are connected in series to the earpiece; for ESD protection, varistors are used.

Audio Control Signals

The HEADINT signal is needed for recognizing the external device (e.g., headset) connected to the system. The recognition is based on the ACI-pin on the system connector, which is shorted to ground inside the external device.

The button of the external device generates HOOKINT. This is used to answer or to end a phone call.

Acoustics

Earpiece Acoustic

RH-25 uses the PICO 8mm earpiece.

This earpiece is mounted into the UI-shield assembly, the sealing of the front volume is achieved using a foam gasket mounted on the front of the speaker. The UI shield is sealed using a rubber sealing between UI shield and A-cover to create an acoustic path.

IHF Speaker Acoustics

The MALT speaker is used in RH-25 for integrated hands-free and ringing tone applications.

The IHF speaker is mounted to the IHF enclosure on a foam sealing ring. The IHF enclo-

+ 28 hidden pages

Nokia 6560 Service Manual 7rh25bbnew

Troubleshooting - Baseband

Contents

Baseband Top-Level Description

Baseband Block Diagram

Environmental Specifications

Normal and Extreme Voltages

Temperature Conditions

Humidity

Frequencies in Baseband

Infrared Interface (IrDA)

Energy Management

Power Supply Modes

Battery BLD-3

Power Distribution

DC Characteristics

Audio Circuitry

Audio Block Diagram

Earpiece

Microphones

Integrated Hands-free (IHF)

Audio Accessory Receive Path

Audio Control Signals

Acoustics

Earpiece Acoustic

IHF Speaker Acoustics