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28

K2 K3 | SERVICE MANUAL

By means of an oscilloscope, check the signal on the
Q11, Q12 Gates. (Fig. 30)

(Fig. 30)

Q11

Q12

In case of absence of signal ask for either

KT000833.R K LGT DC/DC CONV KIT
KT000801.R K LGT DC/DC CONV KIT

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Summary of Contents for K2 DSP+AESOP

Page 1: ...Keep this manual for future reference 2019 Powersoft powersoft_K2K3_servman_en_v4 4 Service Manual K2 K3 Top class amplification covering any power needs in touring applications...

Page 2: ...Intentionally left blank...

Page 3: ...ained for the most common faults The components to be replaced are clearly shown to help their identification At the end of this guide you can find a detailed list with the description and the respect...

Page 4: ...X VOLTAGE CABLE CB000586 R RAIL BUS VOLTAGE CABLE CB000587 R K AMP AUX VOLTAGE CABLE CB000584 R ZOBEL RESISTOR CABLE CB000588 R SERVICE CTRL BOARD firmware 2 0 5 testing purposes ONLY SERVICE FRONT DI...

Page 5: ...n the center using a smaller Phillips PH 0 Fig 1 Remove the amplifier cover by unscrewing the eight screws four in the front two in the centre and three in the back using a Phillips PH 0 screwdriver F...

Page 6: ...cting a 40 W 230V lamp to the connectors portrayed in Fig 4 Lamp min 40W 230V best 60W 230V Fig 4 Once the amplifier is open and its power supply fully discharged it is possible to start removing the...

Page 7: ...PFC starts rising the current Boosts the capacitors voltage to 410VDC 3 The amplifier is operational after 3 sec This sequence of powering processes are followed to limit the inrush current of the MA...

Page 8: ...netic interferences FIRST BULK CAPACITORS 4 7 uF Act before P F C Fast saves the system from any voltage peak TRANSISTOR Voltage Regulator of the Primary AUX power supply TRANSISTOR Activates the Fan...

Page 9: ...ur Description Notes POWER IGBTs Used for the DC DC Converter 3 DIODES Secondary Rectifier 2 PARALLEL TRANSFRMERS Manage current for the entire system and the AUX TRANSFORMER Senses the current in the...

Page 10: ...10 K2 K3 SERVICE MANUAL INDEX Colour Description COIL 3 MOSFETS DIODE CONTROL CIRCUIT P F C Booster The P F C Booster boosts the P F C Output to 410 VDC...

Page 11: ...11 K2 K3 SERVICE MANUAL INDEX Colour Description CONNECTION TO THE OUTPUT STAGE...

Page 12: ...e checking the Diode Diodes and MOSFETS are paralleled Check both VOLTAGE REGULATORS CAPACITORS 4 RESISTORS Sense the channel s ouput current LC CIRCUIT LOW PASS FILTER Break Frequency at 60KHz LC CIR...

Page 13: ...13 K2 K3 SERVICE MANUAL INDEX Driver Board The Zobel Resistor Network is located underneath the Heatsink Heatsink Removed Driver Board still mounted KAESOP DSP Control 2 2 3 3 1 1...

Page 14: ...be 45mA 10 Fig 8 With the multimeter set to Ohm check for continuity in the fuses and the varistor highlighted in Fig 6 Fig 6 With the multimeter set to Ohm check for short circuit between TP1 and TP...

Page 15: ...ets by probing between the highlighted end of the fuse holder and the top if the resistors as portrayed in the following pictures Amp Board Overview Continuity between these test points is an indicato...

Page 16: ...n between the power supply board and the output amplifier board Fig 9 Disconnect and remove the flat cable bridge between the power supply board and output amplifier board as portrayed in Fig 10 Fig 9...

Page 17: ...he 7 screws and the brass riser to be removed with a Phillips head and a socketed screwdriver Fig 12 Disconnect the amplifier power switch cable by removing the faston behind it as portrayed in Fig 11...

Page 18: ...18 K2 K3 SERVICE MANUAL INDEX Detail of screws number 1 2 Detail of screws 3 and 4 Detail of screw number 5 Detail of screw number 6 Detail of screw number 7 Detail of brass riser screw number 8...

Page 19: ...K2 K3 SERVICE MANUAL INDEX Once all 8 screws have been removed remove the power supply board heat sink outer most screws with an M3 hexagonal key as portrayed in Fig 13 Heat sink screws removed Fig 1...

Page 20: ...holder by pressing on its sides then remove the mains socket screws as portayed in Fig 14 Fig 14 Mains connector screws removed Proceed in unscrewing the nut that holds the earth ground cable behind...

Page 21: ...crewing all 14 higlighted screws portrayed in Fig 16 it is possible to remove the rear panel Fig 16 Removed rear panel Fig 17 Fig 18 Lastly remove the Fan by unscrewing the two cable holders and the t...

Page 22: ...to remove the power supply board from the chassis as portrayed in Fig 19 Gently lift and pull the board paying attention not to damage any of its components Fan removed from the amplifier chassis Fig...

Page 23: ...With a thin piece of strong plastic pry all the components off the heatsink so that a little gap is formed between the two as portrayed in Fig 21 It is now possible to safely remove the heatsink by si...

Page 24: ...en a clean cloth with some isopropyl alcohol and wipe off the excess residues Delicately swab the residues off the components Replacing the Gap Pads Carefully scrape off all residues from the heatsink...

Page 25: ...fuses Fig 24 Locate TP1 and TP2 on the KLASV11 board and check the resistance between these two Test Points Fig 25 Fig 23 Fig 24 Fig 25 Locate the F1 F2 fuses and the TP1 TP2 Test Points Fig 23 If the...

Page 26: ...K3 SERVICE MANUAL INDEX Locate the Q3 Q4 Q5 Mosfets Fig 26 Set the multimeter to Ohm and check the Mosfets as portrayed in Fig 27 Fig 26 Fig 27 If the resistance is 0 ask for the KT000834 R K LGT PFC...

Page 27: ...Fig 28 Supply 18 Vdc by slowly incrementing the Voltage from 0 Vdc Check for proper absorption it should be 45mA 10 Fig 29 Fig 29 If the absorption value doesn t match the DC DC converter is faulted a...

Page 28: ...ICE MANUAL INDEX By means of an oscilloscope check the signal on the Q11 Q12 Gates Fig 30 Fig 30 Q11 Q12 In case of absence of signal ask for either KT000833 R K LGT DC DC CONV KIT KT000801 R K LGT DC...

Page 29: ...to two DC power supply and slowly increment the voltages to the illustrated values in order to check the absorption Fig 31 Mains Inlet 50V 20mA 10 CN5 18V 40mA 10 If the outcome is positive repeat th...

Page 30: ...30 K2 K3 SERVICE MANUAL INDEX Locate the FA1 FA2 FA3 Faston connectors Fig 32 Fig 32 Fig 33 With a multimeter check the Rails s voltages Fig 38 FA1 Rail 10Vdc 13Vdc FA2 Ground FA3 Rail 10Vdc 13Vdc...

Page 31: ...31 K2 K3 SERVICE MANUAL INDEX Plug a switch to the fastons highlighted in Fig 34 as portrayed in Fig 35 Fig 34 Fig 35 Final inspection AC mains...

Page 32: ...ase the voltage on the variac to 80Vac Check all the control LEDs highlighted in Fig 37 they should light up as soon as the variac reaches 80 Vac output Warning this test is meant to be carried out wi...

Page 33: ...r output board Before removing the amplifier output board please discharge the power supply capacitors as illustrated in chapter 3 Start from unscrewing the rear panel connectors removing the mains co...

Page 34: ...e the two flat cables between the power supply board and the amplifier output board Fig 40 Fig 40 Flat cable removed Remove the nuts holding the amplifier output board heat sink as portrayed in Fig 41...

Page 35: ...K2 K3 SERVICE MANUAL INDEX Amplifier output board overview Screws 2 3 and 4 Screw 1 Screw 5 and 6 Screw 7 Now remove the amplifier output board by unscrewing all 7 screws marked in the following pictu...

Page 36: ...cables connecting the optional KAESOP board if installed to the front panel RJ45 plugs as portrayed in Fig 42 Pull back the amplifier output board in order to unplug the two control board s flat cable...

Page 37: ...ally possible to remove the amplifier output board from the amplifier chassis as portrayed in Fig 44 Fig 44 Amplifier output board out of the amplifier chassis Gently lift and pull the board paying at...

Page 38: ...crew all 10 bolts highlighted in Fig 45 Fig 45 With a thin piece of strong plastic pry all the components off the heatsink so that a little gap is formed between the two as portrayed in Fig 46 Fig 46...

Page 39: ...ve the leftover glue Spray some WD40 or equivalent on a clean cloth and wipe off the excess residues Replacing the Gap Pads Carefully scrape off all residues from the heatsink mounted components remov...

Page 40: ...ondition of the Mosfets of every channel The test can be done by measuring the resistance value between the pins of the output mosfets assembled on the output stage board Here below the mosfets relate...

Page 41: ...sistor on the male faston connectors assembled on the output stage Fig 52 FA1001 FA1002 for channel 1 FA2001 FA2002 for channel 2 Insert the SERVICE FRONT BOARD Fig 51 Connect the ribbon cable 8 pins...

Page 42: ...Power supply must be set to 0 Vdc and the voltage gradually increased to spec in order not to damage the internal components On the other dual voltage power supply sets the output voltage at 0 VDC Co...

Page 43: ...follow 18 VDC approx 1 15 A 18 VDC approx 0 25 A Connect signal generator or a CD player on the input of CH1 and CH2 of output stage board and feed it with an EIAJ test signal Fig 57 Re assemble the...

Page 44: ...ig 61 7 Removing the fan Prior to removing the fan please proceed in discharging the power supply s capacitors bank as explained in chapter 3 Begin the fan disassembly by unscrewing the fans power cab...

Page 45: ...ore removing the display discharge the power supply capacitors bank as explained in chapter 3 Remove the Faston connectors connecting the amplifier power switch as portrayed in Fig 62 Now remove the f...

Page 46: ...stomized for that specific amp The K FRONT must be replaced entirely when either one of the following components is faulty Card Reader Pushbuttons LEDs In case of a fault in the Display such as pixel...

Page 47: ...essed with one hand 4 With the other hand turn the amplifier on and wait 3 6 seconds 5 Right after the fan test full throttle blow when the yellow LEDs on the panel begin blinking you can release the...

Page 48: ...ards and Firmware cards after version 3 26 4 are eligible to be updated In order to load the firmware into the Powersoft Firmware Update Smart Card follow these steps Download the firmware package fro...

Page 49: ...you forget to press the first right hand MENU button on your amplifier BEFORE inserting the smart card the Powersoft Firmware Updater Software displays the warning message portrayed on Fig 73 Fig 73 R...

Page 50: ...table Go to Menu Setup Service and insert the Service password With a variac set the AC mains at 230 VAC and calibrate the mains for 220 230 V AC mains press the VMains Cal HIGH and insert the value...

Page 51: ...Vpeak sine wave stationary signal No load on the output stage Check on the display if the Vrms value has sets approx 80 Vrms By acting on the channel potentiometer Fig 76 set the output current at 0 t...

Page 52: ...52 K2 K3 SERVICE MANUAL INDEX Menu Diagrams Main Menu Diagram DSP Settings...

Page 53: ...chine to a Real Machine Import a Virtual AMP from the Model List Open Discovery Remote Entities Drag Drop the real amp onto the virtual one An arrow should appear when hovering the real AMP over the v...

Page 54: ...ux PSU 4 Negative 15V aux PSU 8 Positive 5V analog PSU 100 Negative power rail Ch1 PSU 200 Negative power rail Ch2 PSU 2000 Positive power rail Ch1 PSU 4000 Positive power rail Ch2 PSU 8000 External a...

Page 55: ...8 R K DISP REPAIR KIT KT000805 R K LGT AMP 1CH KIT KT000833 R K LGT DC DC CONV KIT KT000801 R K LGT DC DC CONV KIT KT000834 R K LGT PFC KIT KT000804 R K LGT FAN KIT KT000803 R K LGT PSU OVRVTG Part Nu...

Page 56: ...p Side Cover Screw short VI000024 Heatsink Screw ME000235 Heatsink Brass Spacer VI000034 Rear Connector Screw VI000057 Internal Board Screw VI000110 Internal Board Pillar VI000112 Rear Bracket Screw V...

Page 57: ...INDEX INDEX ME000214 ME000220 ME000215 ME000219 ME000214 ME000284 ME000359 ME000360 ME000391 ME000363 ME000213 ME000334 ME000218 ME000210 ME000357 ME000358 ME000370 2 RS485 TA000005 00 ME000284 ME0003...

Page 58: ...vers ME000360 2 Lateral inox plate ML000016 2 EMI Spring VI000112 1 Screw SCW TBEI_ M3X6 K_LGT _No_ETH version Part Number Description SM00F645 3 K_Series_Front_side SM00P645 3 K_LGT_Front_Rear_side...

Page 59: ...K3 SERVICE MANUAL INDEX Martin Audio 5 2 K ME000324 ME000330 ME000328 ME000329 ME000324 ME000359 ME000376 ME000391 ME000363 ME000327 ME000334 ME000487 ME000326 ME000357 ME000358 ME000368 RS485 TA0000...

Page 60: ...0330 1 MA LX front side ME000282 1 EMI shield protection ME000283 1 EMI shield 2 plugs series ME000334 1 K Funcard reader protection SC000061 1 Trasparent bug TA000005 00 1 K Series Lexan front protec...

Page 61: ...ERVICE MANUAL INDEX OUTLINE T5 ME000327 ME000320 ME000215 ME000319 ME000321 ME000284 ME000359 ME000375 ME000391 ME000363 ME000213 ME000334 ME000487 ME000210 ME000357 ME000358 ME000366 2 RS485 TA000005...

Page 62: ...061 1 Trasparent bug TA000005 00 1 K Series Lexan front protection VI000021 1 Spacer SPC M3X12 VI000082 4 Screw SCW TSPZ_ M4X8 VI000112 4 Screw SCW TBEI_ M3X6 VI000140 4 Screw SCW ATCCH M2 9X6 5 VI000...

Page 63: ...204 Martin Audio PC000114 3 11 9 Power Cord CV000063 K LGT Japan US Taiwan Canada Brazil CV000071 K LGT Australia CV000061 K LGT EU CV000068 K LGT China When Ordering inform the Powersoft Customer Car...

Page 64: ...7 rail leds should be off or it is needed to discharge capacitors bank Locate the control board positioned in the front left corner of the amplifier as in Fig 78 and remove the screws of the control...

Page 65: ...Kit comes as two brass spacers two spacers two flat cables a KAESOP board protected in an electrostatic shielding envelope a front panel RJ45 board protected in another electrostatic shielding envelop...

Page 66: ...a Phillips PH0 screwdriver Screw the brass spacers provided with the KAESOP kit Fig 92 Once the KAESOP board has been correctly positioned on top of the control board pay particular attention to the f...

Page 67: ...following pictures The Powersoft Firmware Updater utility can be used to update the KAESOP board firmware with an easy guided procedure The software can update an unlimited number of amplifiers in a p...

Page 68: ...68 K2 K3 SERVICE MANUAL INDEX Lastly perform a Firmware update as described in the previous section...

Page 69: ...dio Outline Lemuse Void APG DUECANALI 3904 DUECANALI 5204 K2 JP 2000 SA20 2 K3 MA 5 2 K T FIVE JP 3000 BIAS V3 SA30 2 OEM STEP UP PROCEDURE WARNING In order to perform the step up procedure for OEM am...

Page 70: ...ust be Worn Observe precaution for handling Electrostatic Discharge sensitive devices Safety precautions We recommend to follow all precautions stated by the law while handling sensitive electrical co...

Page 71: ...Intentionally left blank...

Page 72: ...version available on www powersoft audio com Powersoft S p A Via Enrico Conti 5 50018 Scandicci FI Italy Tel 39 055 735 0230 Fax 39 055 735 6235 General inquiries info powersoft it Sales sales powers...

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