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Service Note 

Product 

Description: 

Service note no. 

M5000 

Modification to avoid E04 when warm 

71210T057 

 

Filename:  SNo_T057.doc  
Date: 01-03-2007 

TC Electronic 

Page 1 of 3 

 

 

This modification concerns only M5000s with serial no.

 between 280000 and 281720.

 

 

A combination of warm environment, low main voltage and electrically noise might cause the error 
message E04. 

 

To avoid this problem the following modification at the CPU PCB (M5000-x) is necessary. 

 

1. Disconnect power 

2. Remove the top cover and the bottom cover. 

3. Remove the 3 cables to the CPU-PCB. The 3 cables are connected to J2, J3 and J4. See fig. 1. 

 

 

 

 

4. Remove the CPU PCB by unscrewing 2 screws on the solder side of the PCB and by unscrewing the 2 

jack nuts. See fig. 2. 

 

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