SIEMENS C35, M35, S35 Repair Documentation Level 2.5e

C35(i), M35(i), S35i

Level 2.5e

Repair Documentation

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V1.0 Page 1 of 35 ICM MP CC ST
P35 Company Confidential 03/01

Table of Contents:

1 LIST OF LEVEL 2,5E PARTS P35............................................................................................................4

2 REQUIRED EQUIPMENT..........................................................................................................................5

3 REQUIRED SOFTWARE............................................................................................................................5

4 RADIO PART................................................................................................................................................6

4.1 POWER SUPPLY FOR RF PART.............................................................................................................6

4.2 FREQUENCY GENERATION...................................................................................................................7

4.2.1 DISCRETE 13MHZ VCXO................................................................................................................7

4.2.2 VCO LO1..............................................................................................................................................8

4.2.3 VCO LO2..............................................................................................................................................9

4.2.4 PLL IC LMX 2379............................................................................................................................10

4.3 ANTENNA SWITCH.................................................................................................................................11

4.4 RECEIVER.................................................................................................................................................12

4.4.1 LNA-PCN AND FILTER....................................................................................................................12

4.4.2 LNA-GSM AND FILTER...................................................................................................................13

4.4.3 MIXER, IF-AMPLIFIER AND DEMODULATOR .......................................................................14

4.4.4 BRIGHT IC BLOCKDIAGRAMM .................................................................................................15

4.5 TRANSMITTER........................................................................................................................................16

4.5.1 MOULATOR AND UP-CONVERSION LOOP................................................................................16

4.5.2 POWER AMPLIFIER AND ANTENNA SWITCH..........................................................................17

5 POWER SUPPLY........................................................................................................................................18

5.1 OVERVIEW AND VOLTAGES................................................................................................................18

5.2 POVER SUPPLY ASIC..............................................................................................................................19

5.3 BATTERY MEASUREMENTS AND CHARGING CONCEPT............................................................25

6 LOGIC PART...............................................................................................................................................29

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6.1 OVERVIEW LOGIC................................................................................................................................29

6.2 OVERVIEW EGOLD...............................................................................................................................30

6.3 OVERVIEW EGAIM...............................................................................................................................31

6.4 ACOUSTICS AND ILLUMINATION......................................................................................................32

6.4.1 GERNERAL.........................................................................................................................................32

6.4.2 RINGER AND VIBRA........................................................................................................................34

6.4.3 MICROPHONE AND LOUDSPEAKER...........................................................................................35

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1. List of available level 2,5e parts P35

ID-No Type Name(function)/Location Rep-Code Order No.
D100 IC GAIM /Logic 4GAI L36820-L6071-D670

D103 IC Egold/ Logic 4EGO L36810-G6096-D670

D200 IC ASIC/ Pow.Supply 4PSA L36145-J4682-Y16

D402 IC LMX-PLL/RF 4PLL L36820-L6038-D670

Z4450 IC Bright/RF 4BRI L36820-L6048-D670

N400/401 IC Volt. Reg./RF 4REG L36810-C6049-D670

N501 IC Op.Amp./RF 4OPA L36810-C6053-D670

N502 IC PA/RF 4PAM L36851-Z2002-A40

V211 Trans. Charg./Logic 4CHT L36830-C1046-D670

V305 Trans. Ringer-Light/logic 4RIT L36830-C1081-D670

V305 Trans. Vibra/logic 4VIT L36702-C1340-S67

V460 Trans. LNA/logic 4LNA L36840-C2039-D670

V501/502 Trans. TX/RF 4SWT L36840-C4013-D670

V508 Trans. TX/RF 4SWT L36840-C4014-D670

V306/800 Diode Vibra-Ringer/Logic 4RID L36840-D53-D670

Z100 Quartz Egold/Logic 4OSC L36145-F102-Y8 (B1 lay.)

4OSC L36145-F102-Y9 (B2 lay.)

Z601 Quartz 13MHz/RF 4VCX L36145-F220-Y4

Z404 VCO 1LO/RF 4VC1 L36145-G100-Y68

Z480 VCO TX/RF 4VCT L36145-G100-Y37

Z440 Filter IF/RF 4IFF L36145-K280-Y132

Z450 Filter RX-PCN/RF 4FI1 L36145-K280-Y133

Z451 Filter RX-PCN/RF 4Fi2 L36145-K280-Y135

Z460 Filter RX-GSM/RF 4FI3 L36145-K280-Y118

Z461 Filter RX-GSM/RF 4FI4 L36145-K280-Y121

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2. Required Equipment for Level 2,5e P35

Ø GSM-Tester (CMU200 or 4400S incl. Options)
Ø PC-incl. Monitor, Keyboard and Mouse
Ø Bootadapter 2000 (L36880-N9241-A200)
Ø Troubleshooting Frame P35 (F30032-A74-A1)
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 Supply Cables
Ø Dongle (F30032-P28-A1)
Ø BGA Soldering equipment

Reference: Equipment recommendation Level 2,5e

3. Required Software for Level 2,5e P35

Ø Windows NT Version4
Ø Winsui P35
Ø Winswup
Ø Windows software for GSM-Tester
Ø Software for 13MHz adjustment

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4. Radio Part

The radio part converts the I/Q base band signals supplied by the logic (EGAIM) Notes
into RF-signals with characteristics as per the GSM recommendation
(transmission) which are radiated by the antenna.
Or the radio part converts the received GMSK signal supplied by the antenna
into IQ base band signals which can then be further processed by the logic
(EGAIM). The radio part is designed for Dual Band operation and can therefore
serve the frequency bands EGSM900 and GSM1800. The radio part can never
transmit and receive in both bands simultaneously. However, the monitor time
slot can be selected independently of the frequency band.
Transmitter and receiver are of course never operated simultaneously.

The radio part consists of the following blocks:

• Power supply

• Synthesizer

• Receiver

• Transmitter

• Transmitter (Power amplifier)

• Antenna Switch

4.1 Power Supply RF-Part

Two voltage regulators (N400/401) with a nominal output voltage of 2.8V in the
SOT23-5 housing are used. The voltage regulator N400 is activated via

VCXOEN provided by the ASIC.

The voltage regulator N401 is activated via SLEEPQ provided by the Egold.
To reduce interference signals a 220µF electrolytic capacitor is
connected to the input of the regulators.

The name of the voltages are: a) UTXVCO activated by VCXOEN
and b) VCCBRIGHT activated by SLEEPQ

For both voltages BATT+ is required.

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4211

4.2 Frequency generation

4.2.1 Synthesizer : The discrete VCXO (13MHz)

The generation of the 13MHz signal is done in the P35 via a discrete VCXO. Notes
A Colpitts oscillator with a post-switched buffer stage is used as oscillator switch.
The subsequent oscillating circuit (C607,C683, L600) and the resistor R650
create a de-coupling of the synthesiser from interference signals coming from the
logic.
The oscillator frequency is controlled by the (AFC_PNM) signal which is generated
from the EGOLD and the capacity diode V600.
To reduce the charging time of the low pass (R671, C671) the resistor R671 is
bridged by the diode V671
For the temperature control a temperature-dependent resistance R673 is placed
near the VCXO.

The required voltage VCC_VCXO is provided by the N400 (UTXVCO) through R411
The picture 4211 shows you the signal at the collector of the transistor V685.

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4221

4222

4.2.2 Synthesizer : LO1

The first local oscillator (LO1) consists of the PLL-IC (D402), a loop filter Notes
and a VCO (Z404) module. This LO1 circuit generates frequencies from
1144MHz to 1191MHz for GSM 900 operation and from 1574MHz to 1666MHz for
GSM 1800 operation. It is switched to select the channels in stages of 200kHz.
The loop filter has a limit frequency of approx. 10kHz and a periodic suppression.
The VCO module is switched on via the signal PUPLO (V401).
The switching between GSM900 and GSM1800 is done via the signal _GSM (V402),
generated by (D402) through the programming signals SYGCCL, SYGCDT,SYNSTR
The VCO output signal enables the BRIGHT IC to mix the IF-Frequency (225 MHz)
The VCO output is also guided to the PLL-IC (D402) to ensure the frequency stability
(DO1<>VCTRL). To do so the 13MHz frequency is used as the reference signal for
the PLL circuit.
The programming of the PLL-IC is realised by the EGOLD with the signals:

SYGCCL; SYGCDT and SYNSTR.

The required voltage VCCBRIGHT is provided by N401.
The _GSM (not GSM900) signal is on “H” level

The picture 4221 shows the VCO output signal
The picture 4222 shows the programming signals for the PLL

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4231

4.2.3 Synthesizer : LO2

The second local oscillator (LO2) consists of the PLL-IC (D402), a loop filter, the Notes
BRIGHT IC and a discrete VCO. The LO2 circuit generates the frequencies 520MHz
or 540MHz as required. The mobile phone normally uses the frequency 540MHz.
The LO2 switches to 520MHz in the GSM1800 TX mode only. The Signal (_GSM) is
used for switching. The loop filter has a limit frequency of approx. 10kHz and a
periodic suppression.
The oscillator is constructed discretely, whereby the active part and its operating
point setting are integrated in the BRIGHT (see BRIGHT Block diagram) .
The PUPLO signal is switching on the discrete LO2 circuit.
The BRIGHT IC is supplied via L445 with VCCBRIGHT

The required voltage VCCBRIGHT is provided by N401
The picture 4231 shows the LO2 output signal

from PLL

to PLL

Bright IC

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4.2.4 Synthesizer : PLL

PLL-IC LMX2379SLBX (D402)

Blockdiagramm

The required voltage VCCBRIGHT is provided by N401

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4.3 Antenna switch (mechanical/electrical)

Internal/External <> GSM900/1800 <> Receiver/Transmitter Notes

The P35 mobile consists of two antenna switches.
a: The mechanical antenna switch (connector X501) for the differentiation

between the internal and external antenna.

b: The electrical antenna switch (Diplexer Z503) for the differentiation between

the receiving and transmitting signals, just like the differentiation between
GSM900 and GSM1800
To do so the signals “_GSM; TXONPA; RXON2” are required to switch the
input signals VC1–VC4.

The matrix below shows the different conditions at the Diplexer and the
accompanying signals.

VC1 (pin2) VC2 (pin4) VC3 (pin8) VC4 (pin10)

GSM TX

GSM RX

PCN TX

PCN RX

high

low

low

low

low

high

low

low

low

low

low

high

low

low

high

low

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