Noritsu 430 ailing

[OldSchoolPhotolab]

 

while the condition of the 430 appeared quite nice and it cleaned up well, there are further headaches.   

 

saturday we powered it up (running with water in the tanks), it warmed/pumped/etc perfectly…

sunday, soon after start-up, it was fine for about 20 minutes…then the air turned blue…and a little flame appeared at the bottom of the lower circuit board… yikes

i am certain we are going to need the circuit board replaced…and the electrical schematics…

does anyone have a board to sell or the electrical diagram/schematics? the board number is: J303568-03.

also, if anyone has any ideas/thoughts as to what changed to create this issue between startup on day one and startup on day two… let me know

thank you, steve

oldschoolphotolab@gmail.com 

 

 

[Minilab service]

This film processor use two voltages - about 230 V and about 110V . You should check film processor connection circuit. Might be you connected wrong and overvoltage burned elements on J303568 . On attachment connection circuit. Have two service manuals for this model. Both with circuit diagrams. Also have part list, but the most parts can't get from Noritsu. These film processors long time discontinued.

QSF-430L power.pdf

[yustas]

Lab is not new.
Almost all electronics in such old film processor are potencially supposed to be dead at any time due to exhausted electronic components and power supply unit.
Clogged relay could be a cause of the fire.
I recommend do not set up auto warming up of the FP in the future.
You may have a fire.
I sent you all information regarding the wiring and manuals, as far as I remember.
So if you really need it - let me know please.

[Ignatius]

Heater(check with voltmeter) or SSR - controls heater switching on/off(replace on PCB)fault. Can be repaired. 

[Dave S]

The usual cause of this is cracked solder joints on the Solid state relays that control the heaters.

The vibration of the machine cracks the joints, then they start to arc and burn the circuit board. The solution is to check and resolder all the bad joints.

Edited February 6, 2018 by Dave S

[davidlam]

Totally agreed with Dave S.   it is due to poor Solid state relays solder joint with machine age. 

check and re-solder all bad joints . . . or make wire bridges bypassing burning area.   I had met a few times this Relay PCB had burnt with hole

Need to be very carefully and once it is done. . .  .

After repair . . . Better don't use program timer mode to warm up in the mornings   while  430 was unattended (nobody in shop I mean ) unless you are 200% confident with the repair