Siemens A35 Operator's manual

V1.0 Page 1of38 ICM MP CC ST
A35-A36-A40 CompanyConfidential 09/01
A35/A36/A40
Level 2.5e
Repair Documentation
V 1.0

V1.0 Page 2of38 ICM MP CC ST
A35-A36-A40 CompanyConfidential 09/01
Table of Contents:
1LIST OF LEVEL 2,5E PARTS A35/36......................................................................................................4
2REQUIRED EQUIPMENT..........................................................................................................................5
3REQUIRED SOFTWARE............................................................................................................................5
4RADIO PART................................................................................................................................................6
4.1 POWER SUPPLY FOR RF PART.............................................................................................................6
4.2 FREQUENCY GENERATION...................................................................................................................7
4.2.1 DISCRETE 13MHZVCXO................................................................................................................7
4.2.2 VCO LO1..............................................................................................................................................8
4.2.3 VCO LO2..............................................................................................................................................9
4.2.4 PLL IC PART OF SMARTI............................................................................................................10
4.3 ANTENNA SWITCH.................................................................................................................................11
4.4 RECEIVER.................................................................................................................................................12
4.4.1 RECEIVER GSM900/1800................................................................................................................12
4.4.2 MIXER, IF-AMPLIFIER AND DEMODULATOR .......................................................................13
4.4.3 SMARTI IC ........................................................................................................................................14
4.5 TRANSMITTER........................................................................................................................................15
4.5.1 MOULATOR AND UP-CONVERSION LOOP................................................................................15
4.5.2 POWER AMPLIFIER AND ANTENNA SWITCH..........................................................................16
5POWER SUPPLY........................................................................................................................................17
5.1 OVERVIEW AND VOLTAGES................................................................................................................17
5.2 POVER SUPPLY ASIC..............................................................................................................................18
6 BATTERY AND CHARGING....................................................................................................................24
6.1 BATTERY...................................................................................................................................................24
6.2 CHARGING CONCEPT............................................................................................................................24

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7 LOGIC PART...............................................................................................................................................26
7.1 OVERVIEW LOGIC................................................................................................................................26
7.2 OVERVIEW EGOLD+............................................................................................................................28
7.3 OVERVIEW EGAIMINSIDE EGOLD+..............................................................................................29
8 MMI FUNCTIONS......................................................................................................................................32
8.1 ACOUSTICS................................................................................................................................................32
8.1.1 VIBRA...................................................................................................................................................32
8.1.2 MICROPHONE AND LOUDSPEAKER (RINGER).......................................................................33
8.2 LIGHT (KEYPAD AND BACKLIGHT)..................................................................................................35
8.3 SIM-CARD AND DISPLAY......................................................................................................................36
8.4 CONNECTORS...........................................................................................................................................37
8.4.1 I/O CONNECTOR...............................................................................................................................37
8.4.2 BATTERY CONNECTOR..................................................................................................................38

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A35-A36-A40 CompanyConfidential 09/01
1. List of available level 2,5e parts A3x
ID-No Type Name(function)/Location Rep-Code Order No.
V100 Transistor TXon1/Logic 4SWTL36840-C4009-D670
D100 IC Egold+/Logic 4EGO L36810-G6103-D670
Z100 Quartz OSC_Egold+/Logic 4OSC L36145-F102-Y10
V200 Transistor Charge/Logic 4CHTL36830-C1064-D670
D200 IC ASIC/Pow.Supply4SPAL36145-J4682-Y23
N201 IC Volt.Reg./Logic 4REG L36810-C6062-D670
V193 Transistor Light/Logic 4LITL36830-C1096-D670
V501 Transistor TX_PA/RF 4PATL36840-C4013-D670
V502 Transistor TX_PA/RF 4PATL36840-C4013-D670
V508 Transistor TX_PA/RF 4PATL36840-C4014-D670
N501 IC Op.Amp/RF 4OPAL36810-C6053-D670
V435 Transistor Volt_SW/RF 4SWTL36840-C4009-D670
V509 Transistor Diplex_SW/RF 4TDI L36840-C4035-D670
V510 Transistor Diplex_SW/RF 4TDI L36840-C4010-D670
V506 Transistor Diplex_SW/RF 4TDI L36840-C4009-D670
V507 Transistor Diplex_SW/RF 4TDI L36840-C4009-D670
N430 IC Volt.Reg./RF 4REG L36820-C6070-D670
N431 IC Volt.Reg./RF 4REG L36820-C6147-D670
Z502 IC PA/RF 4PAML36851-Z2002-A40
D400 IC Demod/Mod/RF 4DEML36820-L6102-D670
Z500 Filter IF_360/RF 4IFF L36145-K280-Y127
Z555 Filter RX_PCN/RF 4FI1 L36145-K280-Y165
Z556 Filter RX_GSM/RF 4FI3 L36145-K280-Y160
D550 IC LNA/RF 4LNAL36820-L6047-D670
Z600 Quartz 13MHz/RF 4VCX L36145-F220-Y6
Z530 VCO 1LO_VCO 4VC1 L36145-G100-Y50
Z570 VCO TX/RF 4VCTL36145-G100-Y32
V530 Transistor 1LO/RF 4TLO L36820-C6047-D670
V601 Transistor 13_AMP/RF 4T13 L36840-C4039-D670
V230 Transistor Vibra/Logic 4VITL36702-C1340-S67

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2. Required Equipment for Level 2,5e A35/36/40
Ø GSM-Tester (CMU200 or 4400S incl. Options)
Ø PC-incl. Monitor, Keyboard and Mouse
Ø Bootadapter 2000 (L36880-N9241-A200)
Ø Troubleshooting Frame A35/36 (F30032-P81-A2)
Ø Power Supply
Ø Spectrum Analyser (Advantest 3221)
Ø RF-Probe incl. Power Supply(e.g. from Agilent)
Ø Oscilloscope incl. Probe
Ø RF-Connector (N<>SMA(f))
Ø Power SupplyCables
Ø Dongle (F30032-P28-A1)
Ø BGASoldering equipment
Reference: Equipment recommendation Level 2,5e
3. Required Software for Level 2,5e A35/36/40
Ø Windows NTVersion4
Ø Winsui version1.22 or higher
Ø Winswup
Ø Windows software for GSM-Tester ( Cats or CMU-GO)
Ø Software for 13MHz adjustment
Ø Internet unblocking solution for “Service Mode”

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4. Radio Part
The radio part converts the I/Q base band signals supplied, bythe logic (EGOLD+) Notes
into RF-signals with characteristics as per the GSM recommendation
(transmission) which are radiated bythe antenna.
Or the radio part converts the received GMSK signal, supplied bythe antenna
into I/Q base band signals, which can be further processed bythe logic (EGOLD+).
The radio part is designed for Dual Band operation and can therefore serve the
frequencybands EGSM900 and GSM1800. The radio part can never transmit and
receive in both bands simultaneously. However, the monitor time lot can be selected
independentlyofthe frequencyband.
Transmitter and receiver are ofcourse never operated simultaneously.
The radio part consists of the following blocks:
• Power supply(RF-Voltage regulators)
• Synthesizer (partlylocated in SMARTI)
• Receiver (partlylocated in SMARTI)
• Transmitter (Up conversion loop partlylocated in SMARTI)
• Transmitter (Power amplifier)
• Antenna Switch
4.1 Power SupplyRF-Part
Two voltage regulators (N430/431) with a nominal output voltage of2.8V are
used, to performthe required “RF-Voltages”.
The voltage regulator N430 is activated via SLEEPQ_SMARTI provided bythe
EGOLD+ (TDMA-Timer H12).
The voltage regulator N431 is activated via VCXOEN provided by
the EGOLD+ (Functional P7).
The name ofthe voltages are: a) VCC_SYN activated by VCXOEN
and b) VCC2_8 activated by SLEEPQ_SMARTI
For both voltages BATT+ is required.

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4.2 Frequencygeneration
4.2.1 Synthesizer : The discrete VCXO (13MHz)
The Axx 13MHzsignal is generated bya discrete VCXO. consisting ofa colpitts Notes
oscillator with a crystal Z600 and a post-switched buffer stage as oscillator switch.
The subsequent oscillating circuit (C611,C619, L600) and the resistor R611
create a de-coupling ofthe synthesiser frominterference signals, coming fromthe
logic (SIN13M (functional F13M)).
The oscillator frequencyis controlled bythe EGOLD+ (functional R3) generated
AFC_PNM signal, and the capacitydiode V600, to ensure that the circuit is
working is stable conditions < 7,7ms after switching on the oscillator.
To reduce the charging time ofthe lowpass (R615, C616) the resistor R615 is
bridged bythe diode V602.
For temperature control a temperature-dependent resistor R613 is placed near the
VCXO.
The required voltage VCC_SYN is provided bythe N431.
The picture 4211 shows the signal at the collector oftransistor V601_2.
EGOLD+
V1.3
GND GND
47K
R615
AFC
Signalform
C110
C616
100N
100N
AFC_PNM
GND
C600
10N
R600
V602
BAS170W
1
2
3
1 2 3
30K 22K
R106
to EGOLD+
to SMARTI
4211

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4.2.2 Synthesizer : LO1
The first local oscillator (LO1) consists ofthe D400 PLL part, a loop filter Notes
and a VCO (Z530) module. This LO1 circuit generates frequencies from1445MHz
to 1520MHzfor GSM 1800 RX-operation, and from1285MHzto 1361MHz
for the other operations. The Z530 is switchable to select the channels in stages of
200kHz. The VCO module is activated bythe EGOLD+ signal
PLLON (TDMA-Timer J12) via V530. The switching between GSM900 and GSM1800 is
realised bythe OSW signal fromthe SMARTI (D400 pin 21),
The channel programming happens via the EGOLD+. signals SYGCCL, SYGCDT,
SYNSTR.
The VCO output signal fulfils three functions:
a) It enables the SMARTI IC to mix the RXIF-Frequency(360 MHz)
b) It enables the SMARTI IC to mix the TXIF-Frequency(424 MHz)
c) It ensures with the help ofthe 13MHzsignal and the SMARTIs PLL part the
frequencystabilitybygenerating a control voltage at (SMARTIpin 20)
The required voltages are: VCC2_8 for D400 provided by N430.
VCC_SYN for the VCO provided by N431
The picture 4221 shows the VCO output signal
The picture 4222 shows the control voltage
The picture 4223 shows the programming signals for the PLL
4221
4223
4222

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4.2.3 Synthesizer : LO2
The second local oscillator (LO2) consists of:Notes
a) the SMARTIs (D400) PLL part
b) the 13MHzreference signal
c) a switchable VCO (inside the SMARTi)
d) an external filter (C509,C510,R501).
The VCO generates 2 frequencies (1440MHzfor RX-Mode and 1696 MHzfor
TX-Mode).
Both frequencies are divided by4, to get the 360MHzdemodulator frequencyand
the 424MHzmodulator frequency.
The RX/TX switching is done internally, initiated bythe EGOLD+ through the
SYGCCL, SYGCDT,SYNSTR signals.
Using the EGOLD+ signal PUPLO2 (TDMA-Timer L11) at pin 16, the second local
oscillator is switched “ON and OFF”
The required voltage VCC2_8 for D400 is provided by N430
PUPLO2
External
filter LO2

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4.2.4 Synthesizer : PLL
PLL as a part of the PMB6250 (SMARTI) IC D400
Blockdiagramm

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4.3 Antenna switch (electrical)
Internal > Receiver/Transmitter <> GSM900/1800
The Axx mobile has in opposite to P35 onlyone antenna switch (electrical). Notes
The electrical antenna switch (Diplexer Z503) is used for the differentiation
between the receiving and transmitting signals, just like the differentiation
between GSM900 and GSM1800.
To do so the transistors V506,V507,V509 and V510 are used to switch the
diplexer signals VC1–VC4 as required.
Please note, that Axx mobiles have no external antenna connector.
The matrix belowshows the different conditions at the diplexer and the
accompanying signals.
from PA
to PCN receiver
to GSMreceiver

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4.4 Receivers
4.4.1 Receiver: GSM900/1800 Diplexer > Filter > LNA> Mixer
Fromthe antenna switch up to the IF-Mixer, the GSM1800 receiver circuit Notes
consists of:
a) a ceramic front end filter (Z555)
b) a LNA (Low Noise Amplifier D550)
c) and a subsequent discrete distortion LC-high-pass-filter.
For GSM900 the signal flowis as follows: Fromthe antenna switch, via a SAWfilter
(Z556), through the LNA (D550) and a discrete distortion LC-low-pass-filter to the
IF-Mixer..
The amplification ofboth LNA´s is approx. 20dB with a matched 50 ohmoutput.
The LNA is switched “On” with the signal LNAON (SMARTI pin 36).
For switching between GSM1800 and GSM900 the signal BSW is generated from
the (SMARTI pin 37).
The signal LNAG (SMARTI pin 33) is in use, ifthe received signal level is too high.
with LNAG “active”, the LNA reduces the incoming signal in one step by20dB
The non-symmetrical LNA output is connected to the IF mixer via a discrete
balancing and adaptation circuit. This circuit converts the asymmetrical
signal into a symmetrical signal.
The required voltage VCC2_8 is provided by N430
4411
4412
4413
4414

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4.4.2 Receiver : Mixer, IF Amplifier and Demodulator
The symmetrical LNA amplified EGSM900 and GSM1800 signals arrive at the Notes
SMARTI pins 31,32,34,35, to be mixed down to the IF frequencyof360MHz..
To do so, the LO1 is guided via the SMARTI pins 22,23 to the different mixers.
Frequencycalculation ofthe LO1: (Freq.GSM = RF+IF and Freq.PCN = RF-IF)
After mixing, the IF is filtered byan external SAW-Filter (Z500) to arrive again at the
SMARTI (input ofthe PGC-Amplifier).
The programmable PGC-Amplifier ensures an equalized level ofthe IF-Signal at the
input ofthe I/Q demodulator. To performthis, the PGC-Amplifier is switched
in 2 dB steps using the EGOLD+ signals (SYNSTR;SYGCDT;SYGCCL).
The demodulation is realised bythe I/Q demodulator. To mix out the IF, the
2nd local oscillator frequency(1440MHz) divided by4, is used.
Finallythe “I” and “Q” signals are amplified and readyfor further operations
through the GAIM part ofthe EGOLD+ (A/D conversion) as RX_I,RX_IX-RX_Q,RX_QX
at the SMARTI pins 1,3,4,48
The required voltage VCC2_8 is provided by N430
to
baseband
from LNA
4433
4434

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4.4.3 SMARTI IC
Not active

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4.5 Transmitter
4.5.1 Transmitter: Modulator and Up-conversion Loop
The Axx modulation is based on the principle ofthe up-conversion modulation Notes
phase locked loop and is accomplished via the SMARTI(D400).
The 2nd local oszillator provides the quadratic modulator with the TX IF signals
(1696MHzdivided by4 = 424MHz).
This resulting GMSK RF signal is compared in a phase detector with the down mixed
GMSK RF signal fromthe TX-VCO to get a control voltage for the TX-VCO.
Down mixing, is done in an internal mixer.
To close the loop, the control voltage (output ofphase detector) is connected to the
switchable TX-VCO (Z570) after passing a lowpass filter.
The TX-VCO, a “two in one” VCO is switched with the EGOLD+ signals
GSM_TX_VCOENQ(TDMA-Timer J13) and PCN_TX_VCOENQ(TDMA-Timer K12) into
the different modes.
The required voltage VCC_2,8 is provided by N430
4512
4511
: 4
Phase
Detector
I Q
Mod
ulator
2.LO
1696 MHz
1.LO
1285-1361 MHz
424 MHz
424 MHz
424 MHz
TX-VCO
TP
880-915 MHz
1710-1785 MHz
Mod Signal
4513

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4.5.2 Transmitter : Power Amplifer Amplifier and Antenna Switch
Splited bya discrete circuit into EGSM900 and GSM1800, the TXVCO output signal Notes
arrives at the power amplifier. The dual band power amplifier module (Z502)
is assembled on a ceramic substrate in one housing. The module amplifies the
output signal ofthe TXVCO to the required PCL (controlled bythe feedbackcircuit
according to settings fromthe logic) .The different amplifiers are switched on by
TXONPCN/TXONGSM via the transistor (V508). The signal PA_Comp is required for
the operation point setting oflowGSM PCLs. The power amplifier is supplied directly
fromthe battery(BATT+).
After amplification the signal passes on the wayto the antenna the diplexer (Z503).
A part ofthe TX output signal is decoupled via a directional coupler (realised by
conductive tracks), is equalised and temperature compensated bya detector
diode (V505).
This so gained voltage, is compared through an operation amplifier (N501) with the
PA_RAMP signal provided fromEGOLD+(Baseband H2). The resulting voltage is
switched with the signals TXONPCN and TXONGSM (V509) to the control ports of
the PA.
The required voltage BATT+ is provided bythe battery.
The required voltage VCC2.8SW is provided bytransistor V435 byusing TXON1
fromthe EGOLD+(TDMA-Timer H14) and V100.
4522
4521
4523
4524

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5. Power Supply
5.1 Overviewand Voltages Notes
The following restrictions must be considered:
• The phone cannot be operated without battery.
• The phone will be damaged ifthe batteryis inserted the wrong wayround
(the mechanics ofthe phone prevent the batteryfrombeing put in the
wrong wayround). The electric systemassumes that the batteryas been
inserted correctly.
Voltages overview
SV Funk
RadioPartLOGIK EGOLD+ FLASH
AMD
8Mbit
AMD
16Mbit
Intel
8Mbit
Intel
16Mbit
ST
8Mbit
ST
16Mbit
DISPLAY
SIM
LED
Vibra
I / O
I / O I / O I / O I / O I / O I / O
I / O
I / O
SV Logik
SV-ASIC
2 Volt
2.65Volt Reg.
2.9 Volt
BATT+
RTC
PA
2.8 Volt Reg.1 PA-Regelung
TXVCO
SMARTI
13 MHz
2.8 Volt Regl.2
2 Volt(RTC)
Ri
Linear-
regulator
[ASIC]
Linear-
[ASIC]
1,6 A
TX
110 mA max.
2,9V +-2%
2,65V +-3%
140mA max.
220mA max.
2,8V +- 3,5%
2,8V +- 3,5%
75 mA max.
45 mA max.
EGOLD+ Core
Flash
Display
Illumination, Display
+ Keypad, Vibra (optional)
Flash 2) + SIM
EGOLD+ Portpin
RX, TX
RF Synth / VCXO
NiMH 600mAh
PA
+Control
Linear-
regulator
[ASIC]
2,07V +-3%
VDDRTC
Linear-
regulator
[ASIC]
2,0V +-5%
100mA max.
10mA max.
EGOLD+ Ringing
(16Ohm HK+GAIM)
193mA + 20mA.
55mA+6mA
22 µF
(at PA)
Display
20mA max.
1mA max.
2) Intel 55mA max.
ST 20mA max.
100mA max.
100mA max.
regulator
Linear-
N430
regulator
Linear-
N431
regulator

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5.2 STV-ASIC
The power supplyASIC contains the following functions: Notes
• Control of“switching on” the mobile phone via
1.The ON/OFF Key. (ON_OFF)
2.The bottomconnector with (External Power)
3.The Real Time ClockRTC (ON_OFF2)
• Watchdog monitoring
1.Control of“switching off” the mobile phone via WATCHDOG_µP.
2. Watchdog observation
• “Switching off” of mobile phone in the case of overvoltage at battery
connectors.
• Generation ofRESETsignal for EGOLD+, Flash and MMI components
• Generation of2.90 V via linear controller for the logic IC.
• Generation of2.65 V via linear controller for the logic IC.
• Generation of2.00 V via linear controller for the logic IC.
• Batterycharge support:
1.Normal charging
2.Trickle charging, ifthe batteryvoltage is below3,2 V
• Timer generation:
All internal timers and pulses are derived froma 900 kHz ±10% internal oscillator.
Responsible for the frequencystabilityis an external resistor (R213) (1%) at the
RREF pin
5.2.1 Switch “ON” sequence
- Generation ofthe “2,0; 2,65; 2,9” voltages
- Generation ofthe “RESET_2,0V and RESET_2,65V”
- Generation ofthe “POWER_ON” through N201
- Generation ofthe “Watch Dog” signal through the EGOLD+
after “POWER_ON”

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Power supplyASIC
Pin Configuration in accordance with Component Specifications:
Functions Pin
Requirements Implementation / Explanation
“Switching on” the
mobile phone ON_OFF
EXT_POWER
ON_OFF2
The following 3 “switch on” conditions will be accepted:
• Falling slope to ON_OFF
• Rising slope to EXT_POWER
• Rising slope to ON_OFF2
Ifone ofthis 3 conditions is recognised, the ASIC switches
into the POWER-Up state and the internal oscillator starts.
After T1 (approx. 60ms) the source ofthe “switch on” signal is
checked again. Ifthe required level is no longer present, the
mobile phone will not switch on and the ASIC switches to the
POWER-DOWN mode. Ifthe required level is still there, the
mobile phone will “switch on”. To do so VCXOEN (internal
SLEEP) will go to HIGH and the 3 voltage regulators VREG1
(2,9V), VREG2 (2,0V)and VREG3 (2,65V) are active.
After T2 (approx. 60ms) counted from“switch on” (i.e. 120ms
frominitial recognition ofthe “switch on” condition) the supply
voltages for 1V9, 2V65 and 2V9 will be checked. Ifthe 1V9
and 2V9 voltages are in order, timer T3 will start and RESET
will be enabled after approx. 60ms.
To ascertain bywhat signal the phone was switched on, the
E-Gold checks the following signals.
KB7 >>>>>>>>>>> to checkthe “On-Off Keypad button”
RTC_INT>>>>>>>> to checkthe timer “on-off”
EXT_Power_µc>>> to checkON-OFF via accessory

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Functions Pin
Requirements Implementation / Explanation
Watchdog
monitoring WATCHDOG_UP The first Watchdog Impulse ofthe EGOLD+
• must be operated at the latest 800ms after the
rising edge ofthe “Reset” signal and
• the WD-Signal must have a rising edge.
Ifone ofthese conditions is not fulfilled, the mobile phone will
switch off.
Ifthis conditions are fulfilled, rising and falling edges are
evaluated alternatelyand used to reset the WD-Timer. With
each edge at the WATCHDOG_UP pin the WD-Timer will be
reseted. Conditions:
The next (inverted to the previous one) edge have to occur
within a time of0.4s...2.6s. Ifthe next edge is recognised
before expiryof0.4s or after an expiryof2.6s or ifthe next
recognised edge is not inverted, the mobile phone will switch
off.
Regular “switch
off” of the
mobile phone
WATCHDOG_UP Switching off ofthe phone is possible, as described in the
watchdog monitoring control, ifthe EGOLD+ is not longer
serving the WATCHDOG_UP pin.
“Switching off” means:
RESETto LOW
POWER_ON to LOW
CHARGE to HIGH-Z.
Regulator 1V9, 2V65 and 2V9 are “OFF”
The ASIC goes into the POWER-DOWN mode.
LowVoltage
Detector LOWVDD Not used
Reset Signal RESET Power-Up:
During the entire “switch on” procedure the RESETsignal is
on “LOW-Level”. Ifthe “switch on” conditions are fulfilled the
change to “HIGH-Level” is taken place after 180ms.
Power Fail:
In the “unit on“ mode the voltage levels ofthe 1.9V and 2.9V
voltage supplyshall be monitored. Ifone ofthis voltages drops
belowa certain level for longer than 10µs, the RESETsignal
switches to “LOW-Level”.
Switch off of the
phone in the
case of
overvoltage at
the battery
VDD In the case ofa too high voltage at the VDD,(voltage level
5.8V ±0.2V within 1µs), the mobile phone will switch off.
Voltage Supply
for the Logic VREG2
U2V0 The linear controller is designed for 1.92V(±3%) and a
maximumcurrent of100 mA.
It consists basicallyofan internal operation amplifier, an
integrated p-channel output transistor as well as an external
capacitor (C = 2.2µF) for stabilising the voltage. This regulated
voltage is measured internally.
In case ofan internallymeasured voltage >3.1V , the output
transistor will switch off.