[Dead] CAnon ir1022a no power

[pantsman]

HI,
I have a canon ir 1022a that appears to be dead.

I have changed the power supply pcb assembly but this has not fixed it.

the machine went dead whilst i was in the office but it didnt go BANG or anything it just died.

Any ideas gratefully received

thanks

Pantsman

[teckat]

HI,
I have a canon ir 1022a that appears to be dead.

I have changed the power supply pcb assembly but this has not fixed it.

the machine went dead whilst i was in the office but it didnt go BANG or anything it just died.

Any ideas gratefully received

thanks

Pantsman

did u check outlet voltage ?
did u check circuit breaker ?
did u check SW1 ?

do u have AC in/ AC out /
what about DC V

When the main power switch (SW1) is turned on, AC power is supplied to the low-voltage power supply circuit in the power supply PCB.
The low-voltage power supply circuit supplies +3.3 V, +5 V, and +24 V to operate the machine.
+24 V is supplied to the motors, fan, electromagnetic clutch, solenoid, etc. +5 V and +3.3 V are supplied to the DC controller PCB, image processor PCB, analog processor PCB.
There are two types of +24 V voltages: +24 VR which is normally supplied from the low voltage power supply and +24 VU which is cut off when the left door is opened. The +24VU is supplied to the DC controller PCB and main motor. The +24 VU also plays the role of a door open detection signal (DOPEN). This signal
allows the CPU to detect that the left door has opened.

Power supply PCB Generates DC power from AC power.
Main power switch (SW1) Supplies AC power to the power supply PCB.

Interlock switch (SW2/SW3) Detects opening/closing of the left door and front cover, and cuts off +24 VR.

The power supply PCB is equipped with an over-current/over-voltage protection mechanism to prevent damage to the power circuit in the event of an over-current or over-voltage, as caused by a short circuit or the like on the load side.

If the over-current/over-voltage protective mechanism has gone ON, disconnect the power cord, and correct the fault; then, connect the power cord once gain to reset the machine. If short circuiting and resetting are repeated, the internal fuse (F1, F2) can melt