Nokia 2220 Servicehandbuch

RH-42

System Module

CCS Technical Documentation

Page 22

 Nokia Corporation          Confidential

Issue 2 09/2003

The interface for RH-42 production testing is a 5-pin pad layout in the BB area (see the 
following figure). The production tester connects to these pads by using spring connec-
tors. The interface includes the MBUS, FBUSRX, FBUSTX, VPP, and GND signals. The pad 
size is 1.7 mm. The same pads are used also for AS test equipment, such as the module 
jig and the service cable.

As BB asics and flash memory are CSP components, the visibility of BB signals is very 
poor. This makes the measuring of most of the BB signals impossible. In order to debug 
the BB, at least to some level, the most important signals can be accessed from the 
0.6 mm test points. The figure below shows the test points located between the UEM and 
the UPP. There is an opening in the baseband shield to provide access to these pads.

3. FBUS_RX

 

8.  GND

 

6.  VPP

7.MBUS

 

2. FBUS_TX

J 4 1 4

J 4 0 3

J 4 1 3

J 4 0 2

J 4 0 4

J 4 0 5

J 4 0 7

J 4 1 5

J 4 0 8

J 4 1 2

J 4 0 6

J 4 0 9

J 4 1 1

J 4 1 0

U E M   (D 2 0 0 )

U P P   ( D 4 0 0 )  

P U R X

S L E E P X

S L E E P C L K

U E M I N T

C B U S C L K

C B U S D A

C B U S E N X

M B U S T X

M B U S R X

F B U S T X

F B U S R X

D B U S C L K

D B U S D A

D B U S E N 1 X