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manual abstract
YAMAHA CORPORATION Name des Importeurs ■ Front Panel ■ Rear 1. POWER This altemate-action switch turns on the AC input to the supply, and thereby provides the necessary output voltages to the console via the umbilical power cable. Pressing the switch a second time turns off the power. 3. (Grille) The power supply is cooled by a pair of quiet running fans that pull air through front-panel grilles and exhaust it through vents at the back. A reticulated foam element behind each grille filters the air entering the power supply. 2. Operation Monitor This panel of LEDs indicates when power is present at the various power supply outputs, as well as other aspects of the power supply's operation. A row of NORMAL LEDs is illuminated when +48V, +12V, +19V, and -19V outputs are operating. Below that is a corresponding row of UNUSUAL LEDs, one or more of which illuminates if the output is not within normal tolerance. There is also a green POWER indicator that is illuminated when power is turned on, a red THERMAL indicator that is illuminated when the power supply has overheated (and automatically shut down), and a digital indicator that displays the AC line voltage input to the power supply. * Cleaning The Air Filters: The reticulated foam air filters on the front of the power supply screen cooling air as it is drawn through the unit. When the foam becomes clogged or dirty, it should be cleaned; check it periodically. Using a 3 mm alien wrench, remove the four cap screws that secure each front grille. The foam elements may now be removed and rinsed in cool water. For greasy or stubborn dirt, dip the elements in a mild solution of detergent and water, then rinse with clear water. Blot and/or air dry the elements thoroughly before returning them to the amplifier. DO NOT USE SOLVENTS TO CLEAN THE FOAM ELEMENTS. 4. DC OUTPUT (Umbilical Connector) This locking, multi-pin connector provides the necessary DC voltages from the PW4000 power supply to the PM4000 console. The cable must be connected correctly before attempting to operate the console. See Figure 1 for the pin assignments. CAUTION: Always make certain that the PW4000 power is turned OFF prior to connecting or disconnecting the umbilical cable at the console or at the power supply. 5. FUSES Three main fuses and one sub fuse protect the primary and secondary portions of the PW4000 power supply. They should be replaced only with fuses of the same current rating and type (250 V Slo-Blow): See power supply specifications. NOTE: Internal fuses in the PW4000 are also present, but should not normally blow. These are for service by qualified service personnel only. 6. (Power Cord) This power cable connects the PW4000 to the AC power mains. A grounded (3-wire) outlet of at least 15 amperes capacity should be used. 7. LINE VOLTAGE INDICATOR (Switch) When this slide switch is in the ON position, the front-panel digital indicator (2) will display the line voltage regardless of the position of the POWER switch (1). Power Supply Specifications Power Requirements Japan CSA/UL General 100 V, 50/60 Hz 48 Channel 40 Channel 32 Channel 24 Channel 1100 W 1000 W 900 W 800 W 120 V, 60 Hz 1500 VA 1250 W 230/240 V, 50/60 Hz 1250 W DC Output Voltages ±20 V 13 A + 12 V 8 A +48 V 0.7 A Fuses Japan, CSA/UL Main (x3) 6 A 250 V Sub (x1) 1 A 250 V General Main (x3) T3.15 A 250 V Sub (x1) T500 mA 250 V Dimensions (W x H x D) 480.0 x 186.0 x 460.6 mm 18.8 x 7.3 x 18.1 inches Weight 36 kg 79.4 pounds CABLE END (MALE) PIN № FUNCTION 1 -19V 2 -19 V 3 FRAME GND 4 -19V 5 -19V 6 FRAME GND 7 FRAME GND 8 +19V 9 +19V 10 ±19V GND 11 ±19V GND 12 +12V GND 13 +19V 14 +19V PIN № | FUNCTION 15 ±19V GND 16 ±19V GND 17 +12VGND 18 +12VGND 19 PM CAUTION {+} 20 +48V 21 +48V GND 22 +12V 23 +12V 24 PW CAUTION {-) 25 NC 26 NC 27 +12V Figure 1. PW4000 Umbilical Conn...