Ricoh D127 Field Service Manual page 156

5. System Maintenance Reference
The table lists the information shown with SP2-220 (Vsg/Vsp/Vsdp/Vt/Vtref Dilay).
SP
SP2-220-1 Vsp
(VP in the display)
SP2-220-2 Vsg
(VG in the display)
SP2-220-3 Vsdp
SP2-220-4 Vt
SP2-220-5 Vtref
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Error condition
Vsp < 2.5V or
(Vsp – Vsp) < 1.00V
Vsp > 2.5V or
(Vsg – Vsg) < 1.00V
No Error Conditions
Vt > 4.5V or
Vt < 0.2V
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Possible cause
• Toner density very low
• ID sensor pattern not
created
• ID sensor defective
• ID sensor dirty
• Drum not charged
• TD sensor defective
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Remarks
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