hp Color 9850mfp OTHER CONTROLS 15.2 Parts that operate only when the power switch (SW1) is turned on 15.2.1 Parts that operate when the reset switch (SW1) is turned on SW1 SW2 II UNIT EXPLANATION (OPTION) Q3228A Q5686A/Q5687A (OPTION) Q5690A (OPTION) ACDB RL2 DCPS2 24VDC RL3 HTR1,2 TRNS1 TRNS2 Fixing unit RL1 DCPS4 (OPTION) When the reset switch (SW1) turns on, AC power is supplied to the DC power unit 1 (DCPS1), AC drive board (ACDB) and the DC power unit 4: optional (DCPS4). As a result, DCPS1 supplies 5VDC to the overall control board (OACB) to monitor it with the main switch (SW2).
15.2.2 Parts that operate when the main switch (SW2) is turned on When the main switch (SW2) is turned on, the overall control board (OACB) detects this condition and sends a control signal to the DC power unit /1 (DCPS1) and the AC drive board (ACDB). The ACDB turns ON the HTR relay (RL3) in the board and provides 24VAC to each heater via the trans- As a result, DCPS1 supplies 3.5VDC, 5VDC, 12VDC and 24VDC to all the boards and optional devices. former/engine (TRNS1) and the transformer/HCI (TRNS2). 2-75 5VDC DCPS1 3.3VDC 5VDC 12VDC 5VDC 12VDC 5VDC 12VDC 24VDC 5VDC 5VDC REMOTE OACB