FECO MT # 90
FECO: MT # 90
MODIFICATION No: N/A
PRODUCT: MT 6XX PRINTERS
SUB-ASSEMBLY POWER SUPPLY
ESTIMATED MAN HOURS N/A
CLASS OF CHANGE: INFORMATIONAL
REASON FOR CHANGE: TYPES OF POWER SUPPLIES AND PROBLEMS

1. This feco is to clarify the different types of power supplies used in the mannesman tally 6xx range of printers.
2. MT645 and MT661

MT part vendor 38 volts notes

Number  
075 114 power systems current sense the earliest supply
075 194 multipower 5a fuse f3 fixed mains cable
076 572 multipower 5a fuse f3 plugged mains cable
080 140 multipower 5a fuse f3 current spares kit
080 662

multipower 5a fuse f3 e.star version of 0800 140

 
3.

MT691/MT681/T6082/T6092

MT part vendor 38 volts notes

Number  
076 744 power systems current sense the earliest supply
078 793 supreme power current sense in most machines
080 663 multipower 5a fuse f3 current spares kit
4.     38 volt problem
4.1   the main logic board can fail, due to a short between the 38 volt line and ground, in one of the step - motor
       drive chips.
4.2   current sensed power supplies shut down without harm, but fused versions blow their fuses.
4.3   the fuse f3 is a 5a pico fuse. MT part no. 076 733.
4.4   if a printer fails with no motor functions always check for a short between j301 pin 3 (38v) and 7 (ground)
       on the logic board before you plug in the replacement power supply. If there is a short, replace the logic
       board.

(tech serv ref mt645 sn59 rev new)

(96/05)

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