Specifications; Power Up Procedure Without M1002 Boards; Dismantling And Reassembly Precautions - YORKVILLE AudioPro AP3000 Service Manual

STEP 3: POWER UP PROCEDURE WITHOUT M1002 BOARDS
It is extremely important that you never power up an AP3000 with the interconnecting cables between the circuit
boards not connected.
Time and possible further damage will be reduced if you test M1011 and M1002 boards separately. To do this you
must use the M1011 and M1002 test connecters. These are shown in figures #5 and #6. These can be made if the
Molex connector parts are available or order them from the Yorkville Service Parts Dept. With the test connectors
connected to every board, slowly variac up the line AC voltage.
NOTE: It may be simplier to remove the power supply connections to M1002 boards not being troubleshooted to
reduce the possibility of further damage. With the M1011 test connector connected, a sinewave can be passed
through the board and be seen on test points 5 and 6. With the M1002 test connector installed, static DC
measurements can be made. A slight DC offset may be present on the board?s output as there will not be any DC
correcting feedback.
STEP 4: DISMANTLING AND REASSEMBLY PRECAUTIONS
A. When removing power supply wires or resoldering wires to eyelets on the M1011 board, double check that there
are no solder bridges or icicles bridging traces or other eyelets. Failure to do so will result in the destruction of
newly installed boards as well as other boards in the unit. Also make sure wire color codes are correctly oriented
in their proper eyelets, and be careful that ribbon cables don? t get pinched or cut under the M1011 board.
B. When reinstalling M1002 boards, make sure the output wires, i.e. the red and yellow signal and black ground
wires, are not reversed. If either or both channels are reversed, the amp will stay in protect mode with the red
protect LED staying on or sampling on and off.
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SPECIFICATIONS

POWER
•
All values are in WATTS at 1KHz, except FTC 20Hz-20KHz.
•
Measurements made with regulated 120 VAC sine wave at line cord.
•
All values are rounded down to the nearest 25 watts
BURST AVERAGE
Measured as a 2 cycle burst at 1KHz, 8:1 duty. (Continuous measurements may require line currents >15 Amps).
ONE CHANNEL DRIVEN (WATTS).
LOAD CONT. AVG.
8 ohms 550 650 1500
4 ohms 900 1250 3000 800
2 ohms 1500 2250 6000 1200
BOTH CHANNELS DRIVEN (WATTS).
LOAD CONT. AVG.
8 ohms 475 625 1500 425
4 ohms 750 1200 3000 650
2 ohms 1200 2175 6000 950
BRIDGED (WATTS)
LOAD CONT. AVG.
16 ohms 925 1225 3000 850
8 ohms 1500 2400 6000 1300
4 ohms 2400 4350 12000 1900
THD DISTORTION ( measured at 1 dB below rated power BW = 80KHz)
LOAD AT 1KHz
8 ohms <0.003 %
4 ohms <0.004 %
2 ohms <0.008 %
CROSSTALK:
INPUT IMPEDANCE:
INPUT SENSITIVITY:
FREQUENCY RESPONSE:
HUM AND NOISE:
DC OFFSET:
PROTECTION:
COOLING:
SLEW RATE:
DAMPING FACTOR:
MAX OUTPUT CURRENT:
TURN ON/OFF:
EFFICIENCY:
WEIGHT:
SIZE:
POWER SUPPLY:
POWER COMSUMPTION:
BURST AVG. PEAK INSTANT
475
BURST AVG. PEAK INSTANT
BURST AVG. PEAK INSTANT
20Hz - 20KHz
<0.04 %
<0.05 %
<0.06 %
-75 dB below full power at 1KHz
-60 dB below full power, 20Hz - 20KHz
20K ohms balanced, 10 Kohms unbalanced
1.4 VRMS sine wave = full power (36 dB gain).
Within 1dB, 20Hz to 20KHz (50Hz boost sw out)
-105 dB below max output RMS voltage, unweighted
less than 25 millivolts
fully protected, DC, LOAD and THERMAL
interleaved heatsink with DC servo controlled fan
Power amp: 30 V/usec, 60 V/usec in bridged mode
(rise time limited to 18 V/usec by input filter).
>500, 20Hz - 400Hz, into 8 ohms
100 amperes for 10 milliseconds, 50 amperes continuous
< 15 milliwatts / seconds, 0.5 Wpk (1s on delay).
Better than 75% at full power into 4 ohms
42 pounds 17.75 Kilograms
3.5" x 19" x 15.75" (front panel to binding posts)
Toroidal transformer and combination
power switch/circuit breaker
Will not exceed 13.5 Amps under actual conditions
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FTC 20-20KHz
FTC 20-20KHz
FTC 20-20KHz