Canon imageRUNNER ADVANCE C5051 Series Service Manual page 485

Item Check■item
(2) Relay■PCB
J421
Riser■PCB
J104
Check■for■any■trapped■cables■and■short■circuit■between■J421■of■the■Relay■PCB■and■J104■of■
the■Riser■PCB.
1.■Disconnect■the■connectors■of■J421■and■J104.
2.■Check■if■power■is■distributed■between■all■pins■of■J421■connector■and■all■the■corresponding■
pins■of■J104■connector.■Normal■value:■0■ohm
<In■case■FU6■or■FU7■on■the■Relay■PCB■is■blown■out>■
3.■Check■for■any■trapped■cables■and■short■circuit■between■pin■1■of■J421■connector■and■all■
the■pins■of■J104■connector■(except■for■the■corresponding■one),■as■well■as■between■pin■1■of■
J421■and■the■chassis.■Normal■value:■∞■ohm
4.■Check■the■rest■of■the■pins■of■J421■connector■in■the■same■manner■as■step■3.
6
Troubleshooting■>■Startup■System■Failure■Diagnosis■>■Flow■E:■12V■Power■Supply■System■Flow■>■Flow■for■narrowing■down■troubles
Location
J421
J104
6 Troubleshooting■>■Startup■System■Failure■Diagnosis■>■Flow■E:■12V■Power■Supply■System■Flow■>■Flow■for■narrowing■down■troubles
Check■the■output■from■the■AC■Power■Supply
Item Check■item
(3) AC■driver■
pins■5■-■pins■
7
Normal■
value:■
AC100V
AC■driver■pins■5■-■pins■7(Normal■value:■AC100V)
T-6-15
6-31
Location
pins 5 - pins 7
6-31