Private Communication Systems
Mobile Phones
S6 Power PCN
S8 PCN
Level 2.5
Repair Documentation
V 1.1
V1.1 |
Page 1 of 23 |
PN MP ST |
D. Schnoor
08/98
Private Communication Systems
Mobile Phones
Table of Contents: |
|
1 INTRODUCTION ................................................................................................................................................ |
3 |
2 TCXO |
|
................................................................................................................................................................................... |
4 |
3 FUSE 1A |
|
................................................................................................................................................................................... |
8 |
4 FUSE 0.25 A |
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................................................................................................................................................................................. |
11 |
5 MOLEX CONNECTOR |
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................................................................................................................................................................................. |
16 |
6 RINGER |
|
................................................................................................................................................................................. |
20 |
V1.1 |
Page 2 of 23 |
PN MP ST |
D. Schnoor
08/98
Private Communication Systems
Mobile Phones
This manual is intended to help you carry out S6 power PCN repairs on level 2.5, meaning limited component repairs. Failure highlights are documented and should be repaired in the local workshops.
The S8 PCN uses the same MMI and RF/Control module as the S6 power PCN but has a different casing.
It must be noted that all repairs have to be carried out in an environment set up according to the ESD (Electrostatic Discharge Sensitive Devices) regulations defined in international standards.
If you have any questions regarding the repair procedures or spare parts do not hesitate to contact our technical support team in Kamp-Lintfort, Germany:
Tel.: +49 2842 95 4666
Fax: +49 2842 95 4302
e-mail: dominik.schnoor@klf.siemens.de
V1.1 |
Page 3 of 23 |
PN MP ST |
D. Schnoor
08/98
Private Communication Systems
Mobile Phones
2.1Affected Units |
|
2.1.1Type: |
S6 Power PCN |
2.1.2Affected IMEIs / Date Codes: All / All |
|
2.1.3Affected SW-Versions: |
All |
2.1.4Fault Code for LSO reporting: |
3TCX |
Network Search
Handset not logging into network
Frequency error in synchronized mode >90 Hz
No location update possible
The TCXO (Temperature Compenseated Crystal Oscillator) is responsible for generating the
13 MHz reference frequency of the handset.
If it is defective, the handset cannot synchronize to the base station anymore.
........ Mandatory
........ Repair
........ Optional
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Private Communication Systems
Mobile Phones
........ Not Yet Defined
Check the output frequency of the TCXO using the level-2 testing program for S6 Power PCN.
Set the „Simulator“ option in the S611.INI file to 0 and restart
the program. Start the test, when the program says „Check power and phase of external antenna with your GSM-Tester“, switch the CMD to „LOCAL“ mode and enter the „MODULE TEST“.
On the CMD display you can see the frequency error of the handset. (Make sure that the CMD is on channel 124, power level 5!)
If the frequency error is higher than 2kHz, the TCXO has to be replaced.
Use hot air blower to remove defective TCXO.
Avoid excessive heat!
Watch surrounding components!
Resolder new TCXO afterwards.
Not possible!
Retest handset after repair as described above. The frequency error must now be < 2kHz.
V1.1 |
Page 5 of 23 |
PN MP ST |
D. Schnoor
08/98
Private Communication Systems
Mobile Phones
TCXO
Part-Number: L36145-G300-Y19
Hot Air Blower
Soldering Iron
None
Desolder Wick / Braid
Solder
V1.1 |
Page 6 of 23 |
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D. Schnoor
08/98
Private Communication Systems
Mobile Phones
Figure 1: S6 Power PCN Board TCXO Side
Figure 2: TCXO (Z601) Placement (Top View)
V1.1 Page 7 of 23 PN MP ST
D. Schnoor
08/98