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Error code reference
Samsung Multifunction Printer Error Code #04-001
LSU Hsync error: after LD on, the laser beam detect signal is not generated or is irregular.
SourceSamsung SCX-6545N - Full Service Manualp. 4-95
Diagnostic procedure
The full #04-001 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check the Beam Detect signal. If there is a BD signal, replace the Main board. If not, check the LD control signal.
SourceSamsung SCX-6545N - Full Service Manualp. 4-95
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
1 manual in the MyPros+ library documents this code for Samsung multifunction printer.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
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