NEC NC1600C Service Manual

Also see for DLP CINEMA NC1600C: User manual Specifications Important information

Contents

NEC NC1600C Service Manual Manual pdf 206 page image

“Confidential, Do Not Duplicate without written authorization from NEC.”8-1CIRCUIT DESCRIPTIONDescription of power supply circuit operation1 Lamp power supply (KSX-4000NEVT)The specifications are outlined below.• A maximum output of 138A/4kW is obtainable.• Input comes in a single phase, ranged from 200V to 240V.The communication system in conjunction with the CPU PWB is of the RS-232C protocol.A high voltage generator (igniter) needed for the starting of the lamp is installed beside the lamp powersupply.The igniter output has to be handled with care because a high voltage of a maximum of 40kV is generatedwhen the lamp is started.2 Standby power supply (LEB100F-0524)When the circuit protector is turned ON, the input AC voltage begins to be applied.The output comes in 5V and 24V. The source voltages are applied to the necessary spots via the PJDIVPWB.The power output of 24V is used exclusively for the optional teach panel.The power output of 5V is fed to the ETHER PWB, CPU PWB, and part of the PJDIV PWB.3 Main power supply (AC6-2HECB-00)(AC6-HE2CB-00)The input AC voltage is applied when the relay of the AC PWB is turned ON.(The input AC voltage is not applied even though the circuit protector is simply turned ON.)The output voltages are 3.3V, 5V, 12V, and 24V. The source voltages are applied to the necessary spots viathe PJDIV PWB.In particular, high voltage accuracy is required for 3.3V and 5V. Adjustments are needed at the time ofreplacement of the main power and the PJDIV PWB.(High voltage accuracy is particularly required for the TI board. If accuracy is not secured, an error will becaused in the TI board.)Method of voltage adjustmentsAt the measuring point TP on the PJDIV WB, connect the voltmeter + probe to TP and — probe to FG.TP8005: 3.3V check TP Adequate range 3.40V ± 0.05V.TP8004: 5V check TP Adequate range 5.05V ± 0.05V.Based on the values of the above-mentioned voltmeter, adjust the VR of the main power supply to theadequate range.In the state of deviation from MM2000B (optional), there is the main power supply on the deep right and thereare four white VRs.First from the left is a VR for 3.3VSecond from the left is a VR for 5VThird from the left is a VR for 12V (for reference)Fourth from the left is a VR for 24V (for reference)The units of the NC2500S (AC6-HE2CB-00) and the NC1600C (AC6-2HECB-00) come in the same shape.However, they have to be handled with care because they have different output capacities.