Comestero rm5 - Faulty outputs: VERSION WITH ULN2003; Faulty outputs: VERSION WITH TRANSISTOR; Faulty coils:

COMESTERO GROUP M21/03.02
Rev.02
of 25/09/03
Page 32 of 34
circuit, it should change its status, if not, try and make weldings again on Q13,R79,C44 or replace
these components.
Faulty outputs: VERSION WITH ULN2003
Replace ULN2003, Check continuity between it and pin-out.
Faulty outputs: VERSION WITH TRANSISTOR
Replace output transistors
Ch1= Q16; Ch2= Q17; Ch3= Q18; Ch4= Q19; Ch5= Q20; Ch6= Q21;
Q16-Q21= BC817
Faulty coils:
Check and make again weldings related to the check points described below.
Check with tester as Ohmmeter (Coils on board)
Check point Check point Ohm Component
1 2 50 Ohm LF
3 4 20 Ohm HFU
7 8 10 Ohm HFL
CN1 CONNECTOR (Coils on door)
2 8 20 Ohm LF
4 8 10 Ohm HFL
6 8 20 Ohm HFU
If a problem concerning the coils installed on RM5 board is found out, it is advisable to send the
coin validator to Comestero for repairs, if a problem is found out on the door coils, it is sufficient to
change the door and the relevant flex.
Amplitude:
Check voltage on C25 (Red terminal) it must be 3.5 Vdc.
Check HFL coils (See Faulty coils)
Cash sensor (TLP):