I have been following this thread with interest, as I have also just replaced the belt after three years of light use. The printer probably has no more than 150 prints run through it. I received the exact same 58:11 error as several other people have reported. The manual obviously indicates some problem with the ESP (reseat/reconnect/clean/adjust). I was mystified since I found at least four other references online to the exact problem after the belt had been replaced, so I assumed it to be unlikely that that the ESP had failed, unless everybody broke it in the same manner when replacing the carriage assembly.
I tore down the printer a second time, and took out the ESP. Looked brand new, almost no ink overspray at all, even on the mirror cover. I cleaned the cover and surrounding areas and checked the condition of the sensor, it looked normal. I replaced everything and booted up, then received the exact same error message again.
I then called tech support, and was willing to spend $39.95 to get a useful answer. Had to insist on higher level tech support as the first two people just told me to replace the color sensor if I got the 58:11 error code. Makes no sense since 58:10 would indicate replacement necessary.
Finally got "Joe", a senior support person who told me free of charge ' this is a one time exception because this is information that we usually only give to technicians...' that since I was not a qualified service technician it is very possible that I broke something when replacing the carriage assembly. ( I did in fact break something- the so called rear carriage bushing- a small piece of plastic at the top rear of the carriage assembly, which is easy to do when replacing the carriage assembly since it needs to be slid in very carefully to clear the bar at the top otherwise it will simply snap in two. I superglued it back together until I can get a replacement. I'm pretty sure that this has little to do with the ESP sensor though- but one never knows)
Anyway he then proceeded to tell me that it is possible that the mirror lens did not open and shut properly, and this might be causing the test to fail. I told him the mirror was in fact opening and shutting properly. He then asked whether I had gotten to the stage in the test where the colored lights were shining onto the paper, and I replied, no only the white light. This indicated to him that the ESP might be damaged- or, and this is the important part- that the belt tension might be too tight, thus causing the carriage assembly to have lifted higher than normal. This might be the cause of the delta E 92 greater than 8 error. I still don't understand the logic exactly other than the fact that the higher the carriage assembly- the further away the lens is from the paper- thus the higher number perhaps? but it seems to indicate that perhaps everyone who replaced the belt as a user without the service technicians' knowledge might be missing a few important adjustments! My next step is to check the belt tension and loosen it. Right now when I replaced the belt I fully tightened the bolt which attached the belt tensioner to the printer, perhaps loosening this will change the height of the carriage assembly thus letting the sensor see the paper better?
I am simply not quite ready to believe that the ESP, which was working perfectly fine when I took the printer apart, is now broken. I was quite careful when reassembling the carriage assembly (for the most part!) but Joe did mention that the ESP was very delicate and could easily be damaged.
Does anyone else have any information about the proper tension on the belt tensioner, whether it needs to be fully tightened or perhaps only partially? Any input would be greatly appreciated.