HP 3030 Service Manual - Page 99
Overcurrent/overvoltage, High-voltage power distribution, Table 4-5. Dc power distribution continued
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Note Table 4-5. Dc power distribution (continued) +24 Vdc Main motor, laser/scanner motor, solenoid, highvoltage power supply, fuser, safety circuit, door switch Overcurrent/overvoltage There are two overvoltage devices in this product: ● Fuse F101 provides overcurrent protection for the fusing system circuitry. ● Fuse F102 (110 V products only) provides overcurrent protection to the printer dc power supply circuitry. You can check or replace the fuses by removing the left cover. If either of these fuses fail, replace the engine power supply. See Power supply. High-voltage power distribution The high-voltage power supply applies an overlap of dc and ac voltage to the primary charging roller and to the developing roller. This circuit also applies a positive or negative dc voltage to the transfer roller according to the instructions from the engine control unit. ENWW Printer functions (all models) 81