iRC3220 panel blackout

[Alan Aya]

Having problem with few of the iRC3220.
When print or copy, the panel blackout when the start button is depress, on/off the machine doesn't do any good.Have already tried replace MN cont, Power supply, DC cont, HVTs, panel but no good.
Anybody can land me a helping hand would be appreciated.

Thank you

[SCREWTAPE]

Could be your sram pcb.
You have two dc power supply's.
and the fuse pcb can cause that same issue.

[teckat]

Having problem with few of the iRC3220.
When print or copy, the panel blackout when the start button is depress, on/off the machine doesn't do any good.Have already tried replace MN cont, Power supply, DC cont, HVTs, panel but no good.
Anybody can land me a helping hand would be appreciated.

Thank you

check your wall voltage /most important -what is reading between Neutral & Gd/need below 1/2v.
The fuse pcb causes a lot of issues on this model/ just because a Fuse reads good continuity-it does not mean the correct voltage is there ,if u have a fuse that should read 5v & it reads 3.5v u have an issue.

try this >turn off printer> unplug main controller fan > turn on>see if LCD screen comes up/and pops an Error code/ if so /i would look to the fuse pcb, I have had a fuse with low voltage cause this/ on this Fuse PCB u need to test for correct voltage across it/do u have the fuse print out for component location & voltages ??
Replace the DC Power Supply (FM1-0408-000) and the Fuse PCB (FG3-3020-000) at the same time.

does the control panel ON indicator stay green ??
The LCD is ok until u press start button, then it turns black ??
so now it will not power up ?

if panel is dark w/no LCD back light & start key is green /look for an issue on Power Distribution PCB
PIC00003..jpg
Did this problem happen before u worked on it or after ?
just some suggestions to follow

[Alan Aya]

The fuse pcb causes a lot of issues on this model/ just because a Fuse reads good continuity-it does not mean the correct voltage is there ,if u have a fuse that should read 5v & it reads 3.5v u have an issue.

try this >turn off printer> unplug main controller fan > turn on>see if LCD screen comes up/and pops an Error code/ if so /i would look to the fuse pcb, I have had a fuse with low voltage cause this/ on this Fuse PCB u need to test for correct voltage across it/do u have the fuse print out for component location & voltages ??
Replace the DC Power Supply (FM1-0408-000) and the Fuse PCB (FG3-3020-000) at the same time.

does the control panel ON indicator stay green ??
The LCD is ok until u press start button, then it turns black ??
so now it will not power up ?

if panel is dark w/no LCD back light & start key is green up look for an issue on Power Distribution PCB
[ATTACH=CONFIG]3727[/ATTACH]
Did this problem happen before u worked on it or after ?
just some suggestions to follow

Actually these machines are from two of my dealers asking for help after they have tried without success.
When there is no problem i can on the machine and the machine able to warm up and ready.It is a intermittent issue. Once the problem occur i will not able to get it on again, so what i do was i tried to replace the component i mentioned in the 1st post (pc by pc) but no luck.I also tried to pulled out and reconnect the connectors on the MN cont,DC cont, Power supply and also the HVTs without changing the component and sometime it can be on, warm up and ready.

[D_L_P]

If it seems to be related to when an operation such as print/copy starts, I think Screwtape had a good idea about the RAM. It can cause random reboot's or lockups.

[teckat]

Main Controller PCB has an LED101 which is ON during normal operation. When you experience a blank LCD screen, inspect the Main Controller PCB LED101, if the LED is OFF, then replace the SRAM PCB (FG3-3669-000) which is mounted on the Sub Main Controller PCB.

If the Fuse for the voltage for the control panel acts like a resistor, the voltage will drop from 3.3 vdc to 1.2 vdc= intermittent blank control panel
as I stated before u need to check that fuse pcb. *********

u need to follow some of these procedures / troubleshooting an issue is a step by step procedure/ I don not jump all over the place and replace PCB'S
FUSE Pcb must function correctly !!!!!!!!!!!

When a overcurrent or a short to ground occurs in the machine such as a motor binding or a wire shorted to the frame of the machine, a fuse on the DC-fuse PCB should open to prevent damage to the machine. The DC-fuse PCB is located in the rear lower left of the machine mounted on the DC-power supply. The circuit diagram for the power distribution is found on page 105 & 106 of the technical reference guide.
The fuse, voltage, connectors, and the destination of the voltage is listed below.
Fuse Voltage Connector Destination Connector
3.3 Volts DC have pink wires
FU11 3.3vdc J59-1 Power distribution PCB J1502-1
FU11 3.3vdc J59-2 Power distribution PCB J1502-2
FU13 3.3vdc J60-3 Power distribution PCB J1501-3
FU13 3.3vdc J60-4 Power distribution PCB J1501-4
FU14 3.3vdc J61-5 Fax G3-G4 J560-3
FU14 3.3vdc J61-6 Fax G3-G4 J560-4
FU15 3.3vdc J61-7 Fax G3-G4 J560-6
FU22 3.3vdc J64-9 DC controller J100-9
FU22 3.3vdc J64-10 DC controller J100-10
5 Volts DC have brown wires
FU16 5vdc J61-13 Fax G3-G4 J560-11
FU17 5vdc J60-1 Power distribution PCB J1501-1
FU17 5vdc J61-11 Fax G3-G4 J560-9
FU17 5vdc J61-12 Fax G3-G4 J560-10
FU23 5vdc J71-5 DC controller J106-1
FU27 5vdc J68-3 Duplex devivery PCB J440-3
12 Volts DC have orange wires
FU12 12vdc J59-5 Power distribution PCB J1502-5
FU18 12vdc J60-8 Power distribution PCB J1501-8
FU31 12vdc J64-7 DC controller J100-7
14 volts DC
FU32 14vdc J65-1 NO output
24 Volts DC have red wires
FU20 24vdc J62-1 H3 Fixing unit J802-4
FU21 24vdc J64-1 DC controller J100-1
FU21 24vdc J64-2 DC controller J100-2
FU24 24vdc J74-1 Power distribution PCB J1509-2
FU24 24vdc J66-1 Fax PCIP J559-1
FU25 24vdc J67-2 Reader J565-1
FU25 24vdc J67-3 Reader J565-2
FU26 24vdc J68-1 Duplex delivery PCB J440-1
FU28 24vdc J70-1 HV2 sub PCB J91-1
FU29 24vdc J70-3 Drum ITB motor J93-1
keep in a safe place _just to add on u need 24v to the Fuse Pcb/ & if Duplex Driver PCB shorts out/as it does on most of these models,When you turn the machine ON, you get a blank screen and the power light flashes a few times and then goes OFF.there is your short=replace Duplex Driver PCB & Fuse pcb same time.