MAN Roland 300 PROBLEM with SPS

[Ruslan]

Good afternoon, we have a problem with the Man Roland 305 + LV printing machine. When starting the equipment from the main switch, the machine starts loading the software. At the moment when it reaches the time of 3 beeps and the start of the engine blowing and the opening of the air supply valves to the system, this does not occur. After 3 beeps, the equipment is blocked, errors appear on the error screen. I attach a screenshot of the errors to the described problem. This problem occurred periodically and earlier, but rebooting the machine allowed to solve the problem, errors disappeared. It was not possible to identify the problem, since it was not tied to any situation. The machine always started normally, but the machine was blocked during operation. Now the problem occurs when the system boots.
I saw that other members of the forum had similar errors, but there are no steps to solve this problem. I would appreciate advice in solving the problem.

 

[CHOCK]

Hi sir:
Please do this steps:

1) Perform a visual inspection : look for loose and broken wires, improperly seated connectors, loose or broken wires
misset switch, missing jumpers. and so on.
Chech for obviously damaged component(components burned or discolore due to overheating);
Dust + dirt + tear +wear

2) Reseating Boards and components:
Edge connectors are a common souorce of problems. Power down the system and remove the PC boards. Examine the edge connector
for contamination and clean with contacts cleaner contacts. Reseat any loose components such as scoketed ICs) . Reseat the
boards and power up.

3) Power supply checks:
Check the power supply for missing voltages and voltages out of spec. A digital multimieter DMM can be necessary, as
voltage specifications are quite tight: logic supplies for example: must be within + 5% percent of 5Vdc. All the
multiple supplies and all must be checked.

4) Board swapping:
Board swapping involves the substitutiono of a known godd board for a suspect one.


5) Clock for CPU:
Check the frecuency with frequency counter or a DMM included frecuency counter( like Fluke DMM)


6)Reset CPU:
reset cpu see the attached schematic.

7) Measure the battery backup: 3.6Vdc

 

[Ruslan]

Thanks, sir, for such a quick reply.

The problem has been around for over 2 months. During this time the contacts of boards, connecting wires, fiber optic connectors for contamination and damage were checked.
Checked the rated power at the points you specified. Service technician Man Roland diagnosed the configuration of the equipment, forced all the slave stations to respond and conform to the configuration. Fiber optic lines signal normal operation. We have checked the working equipment of the SPS boards for each circuitry responsible for receiving and transmitting the signal; UWR input and output b RTR boards are checked. During the diagnostic process, it was found that the exchange of information packets on the network was not working properly. Signal or no UWR from the master SPS; the signal is not transmitted from the UWR to the master SPS. Diagnosis showed that the SPS-master card executes the protocol in the process, every 18 seconds the processor and some chips go into restart without receiving a signal or the signal does not match. We dropped the processor and even changed it to the same processor. We checked all removable processors and pleats with checkpoints for work purpose. The errors have not changed.
We have also reinstalled the MMS and MMS software.

 

[CHOCK]

Hi sir
What about the clock +Vcc power supply? for the CPU microprocessor is there in Tolerance?

If you are measuring +5Vdc and you got it 5.3Vdc the power supply is faulty, Not signal, and board working good.
the same for +24Vdc,etc test again carefully, and follow my steps. Please

Reset the cpU?

you look the boards for dry and colder joint??

what about edge connectors, ?

You can replace by swapping board, but if the edge connectors are faulty??

Again the common sense+ and 5 sense is the most invaluable tools for Troubleshooting and Diagnostic.

 

[drukman]

I don't understand where you are from. If you speak Russian, German, English, Romanian, Bulgarian or Serbian call +359 888557474. You have a problem with the LVL communication of the machine or SPS bus master board.

You can also use Viber at any time.

 

[CHOCK]

I am living in Managua, Nicaragua Central America.
After Mexico, is coming Guatemala, Salvador, Honduras and then Nicaragua.
I am speaking Spanish+English.

 

[Ruslan]

Good afternoon, I want to thank all the forum participants who took an active part in solving the problem. We solved the problem by installing the new SPS-Master board. Given the options that were proposed by the participants, we were able to localize the problem and tried to solve it by repairing the board. Replacing the main elements and microcircuits did not give a result. The MMS SPS program did not work. We still want to repair this board. Perhaps someone has experience repairing such boards. The electronic circuit of such a board? What is the algorithm of the processes?

 

[CHOCK]

ok sir.
Great Job.

 

[sergios68]

Hi Ruslan.

there is a tool called rodimo to define which SPS station is not closing the optic fiber loop, this tool is used by manroland technicians, you must run this tool when the fail is present, the tool shows the list of all stations from the configuration and the status of each one. it is possible that there is a defective DC source in some station that afect the station itself then is disconnected to avoid a big damage. other possibility is some digital input or output board is partially in short circuit. do you can share more information about the machine Nr and serial number from the ID plate located at printinh unit 1, the serial number appear in the first page of circuit diagrams book.