powersoft K Series Service Manual
  1. Manuals
  2. Brands
  3. powersoft Manuals
  4. Amplifier
  5. K Series
  6. Service manual

powersoft K Series Service Manual

Std/hgt
Hide thumbs Also See for K Series:
Table of Contents

Advertisement

Quick Links

K STD/HGT
Service Manual
©2019 Powersoft
Keep this manual
powersoft_KSTD/HGT_servman_en_4.4
for future reference

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the K Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for powersoft K Series

Summary of Contents for powersoft K Series

  • Page 1 K STD/HGT Service Manual ©2019 Powersoft Keep this manual powersoft_KSTD/HGT_servman_en_4.4 for future reference...
  • Page 2 Intentionally left blank...

  • Page 3: Table Of Contents

    Consumption of the Amplifier Output Board identification. At the end of this guide you can find a detailed Testing the Output stage drivers list with the description and the respective Powersoft internal reference code of the spare parts. Output signal presence Always use an anti-static wrist band while servicing the amplifier.

  • Page 4: Service Repairing Kit

    K6 K8 K10 K20 | SERVICE MANUAL 1. Service repairing kit: SERVICE CTRL BOARD firmware 2.0.5 SERVICE FRONT DISPLAY firmware 2.0.5 (testing purposes ONLY) (testing purposes ONLY) K STD/HGT MAINS DC CABLE RAIL BUS VOLTAGE CABLE CB000581.R CB000587.R PSU AUX VOLTAGE CABLE ZOBEL RESISTOR CABLE CB000586.R CB000588.R...

  • Page 5: Opening The Amplifier Cover

    K6 K8 K10 K20 | SERVICE MANUAL 2. Opening the amplifier cover: Disconnect the amplifier from the mains. If the amplifier has been connected to the mains in the last minutes, please proceed with attention as the internal capacitors (Fig. 1) bank could be charged and harmful! Remove the side support steel bars, unscrewing the four largest screws with a Phillips PH1 screwdriver.

  • Page 6: Layout

    K6 K8 K10 K20 | SERVICE MANUAL 4. Layout: CNTRL Board DC Converter...
  • Page 7 K6 K8 K10 K20 | SERVICE MANUAL 5. Technical specifications: Power Supply Overview +Vdc MAINS DC/DC 90 V - 270 V CONVERTER Rectifier -Vdc When the amplifier is switched on, the following actions are performed: 1. The DC/DC converter starts, and the capacitors are charged 2.
  • Page 8 K6 K8 K10 K20 | SERVICE MANUAL Power Supply Components Colour Description Notes FUSE Primary AUX Protection. EMI FILTERS TRANSFORMER Senses the MAIN’s current First Bulk Capacitor Acts before the PFC CAPACITOR (4.7 uF) Fast: saves the system from any voltage peak Low capacitance: should not reduce the ripple LITTLE CAPACITORS Usually affected by Over-Voltage, which results in the explosion of the nearby Varistor...
  • Page 9 K6 K8 K10 K20 | SERVICE MANUAL P.F.C. Boosters PFC Control Circuit Same place of D & Q Series - PAY ATTENTION: It is a different board! DC/DC Converter Colour Description Notes Boosts the Output of P.F.C. to 410 VDC COMPONENTS: 1 Coil - 2 Parallel IGBTs -...
  • Page 10 K6 K8 K10 K20 | SERVICE MANUAL Output Stage Components + Vdc - Vdc Colour Description Notes CAPACITORS Local capacitors for the Rail Bus VOLTAGE REGULATORS 2 X 2 PARALLEL MOSFETS In series with Output MOSFETs 2 DIODES In case of a fault, always chech the 2 diodes and the 4 MOSFETs 2 X 2 PARALLEL RESISTORS Remove the 2 resistors in order to check for faults on the 2 diodes! 2 FAST RECOVERY DIODES...
  • Page 11 K6 K8 K10 K20 | SERVICE MANUAL Removed IN/OUT cover Colour Description Notes CHANNEL PROTECTION FUSES 2 per channel 5 RESISTORS Sense Channel’s Output Current Protect channel from wrong input signal 2 PROTECTION VARISTORS In case of a fault, also check the 2 inductors...
  • Page 12 K6 K8 K10 K20 | SERVICE MANUAL Colour Description Notes LC CIRCUIT - LOW PASS FILTER Break Frequency at 60KHz...
  • Page 13 K6 K8 K10 K20 | SERVICE MANUAL Colour Description Notes LC CIRCUIT - NOTCH FILTER Centered at 192 KHz...
  • Page 14 K6 K8 K10 K20 | SERVICE MANUAL Colour Description Notes LC CIRCUIT - NOTCH FILTER Centered at 576 KHz (3rd harmonic of 192KHz)
  • Page 15 K6 K8 K10 K20 | SERVICE MANUAL Driver Board (located underneath the heatsink) Zobel Network (attached to the bottom of the heatsink) K Series DSP+ETH KAESOP Control...

  • Page 16: Troubleshooting

    K6 K8 K10 K20 | SERVICE MANUAL 5. Troubleshooting: Checking the Amplifier Board: Check the MOSFETs with a multimeter set to Ohm by probing between the rail buses and the output current sensing resistors. (Fig. 5): Checking CH1 MOFETs, positive rail (Fig.

  • Page 17: Checking The Power Supply Board

    K6 K8 K10 K20 | SERVICE MANUAL Checking the Power Supply Board Lift one side of each fuse in order to check it’s integrity. With the multimeter set to Ohm, check for continuity in the fuses and the varistor highlighted in (Fig. 9) Ω...
  • Page 18 K6 K8 K10 K20 | SERVICE MANUAL AUX SUPPLY -Vdc +Vdc -Vdc 18Vdc 140mA Supply an external 18V DC on connector J4 of the power MLX90P3 supply control board (KALSU) by means of the PSU AUX VOLTAGE CABLE (Fig. 11) VAUX Verify that current draw is as portrayed in the following table:...

  • Page 19: Removing The Power Supply Board

    K6 K8 K10 K20 | SERVICE MANUAL 6. Removing the Power Supply Board: Disconnect the faston between the power supply board and the output amplifier board and release the fan’s power cables as portrayed in (Fig. 13) (Fig. 13) Disconnect and remove the flat cable bridge highlighted in (Fig.
  • Page 20 K6 K8 K10 K20 | SERVICE MANUAL Remove the amplifier mains connector by unscrewing the four hexagonal screws highlighted in (Fig. 17) with a 2mm hexagonal screwdriver (Fig. 17) Remove the power supply board by unscrewing it from the amplifier chassis: remove all 10 screws with a Phillips PH 1 screwdriver and the two brass risers with a 5mm hexagonal key as illustrated in the following picture.
  • Page 21 K6 K8 K10 K20 | SERVICE MANUAL Once all these 12 screws have been taken out, remove the power supply board heat sink screws highlighted in (Fig. 18) with a 2,5mm hexagonal screwdrive: (Fig. 18) Last step before being able to remove the power supply board is to unscrew the cable holders indicated in (Fig.

  • Page 22: Removing The Amplifier Output Board

    K6 K8 K10 K20 | SERVICE MANUAL 7. Removing the Amplifier Output Board: Before removing the amplifier output board, please proceed in discharging the power supply capacitors as illustrated in chapter Remove the rear panel’s connectors by unscrewing all 10 screws marked in (Fig.21) (Fig.
  • Page 23 K6 K8 K10 K20 | SERVICE MANUAL Remove the 7 screws that hold in place the amplifier output board with a Phillips PH1 screwdriver, please be aware that on K20s screws 4 and 5 can be masked by the silicon glue. Overview The amplifier output board is now separated from the amplifier chassis.

  • Page 24: Removing The Kalin Heatsink

    K6 K8 K10 K20 | SERVICE MANUAL 8. Removing the KALIN Heatsink: Once the power supply board has been removed from the amplifier chassis as described in chapter 3, it is possible to proceed in removing its single parts in order to gain access to the component level repairs.

  • Page 25: Cleaning The Heatsink

    K6 K8 K10 K20 | SERVICE MANUAL Cleaning the Heatsink: Peel off the SilPad from both sides of the heatsink Using a plastic scraper, remove the leftover glue Dampen a clean cloth with some isopropyl alcohol and wipe off the excess residues. Delicately swab the residues off the components.

  • Page 26: Power Supply Kalsu Removal

    (Fig. 31) (Fig. 32) 10. Fan and Fan Driver Replacement: To keep the amplifier within the correct range of working temperatures, K Series amps have two fans controlled by NTC sensors and microprocessor. The fan’s correct working state is: - fan speed increases when the amplifier’s internal temperature rises - fan is at full speed for approximately half a second at power up - fan does not run in absence of input signal with an environmental temperature of 18°-20°...
  • Page 27 K6 K8 K10 K20 | SERVICE MANUAL proceed in removing the entire rear panel. (Fig. 35) (Fig. 35) Once the rear panel has been removed, remove the RJ45 connector. (Fig. 36) (Fig. 36) Unscrew the fans power cables. (Fig. 37) (Fig.

  • Page 28: Removing The K-Front Display

    Now remove the display from the front panel unscrewing (Fig. 42) the four screws marked in (Fig. 43). When replacing the K-FRONT, please provide Powersoft the Model and Serial Number of the amplifier, since the K-FRONT will be customized for that specific amp.

  • Page 29: Removing The K-Cntrl Board

    K6 K8 K10 K20 | SERVICE MANUAL 12. Removing the K-CNTRL board: To remove the amplifier control board, please proceed by discharging the power supply as explained in chapter Remove the 3 screws higlighted in (Fig. 44). (Fig. 44) Extract the amp board with care. Once the control board is replaced, it is mandatory to reinstall the firmware as illustrated in chapter 8.

  • Page 30: Output Current Offset Calibration

    K6 K8 K10 K20 | SERVICE MANUAL Offset output current reset procedure Output attenuation shall be set at 0 dB: go to Menu → setting → amplifier setting → Output attenuation Gain shall be set to 32 dB and V shal be set according to the amplifier model: go to Menu →...

  • Page 31: Dc Voltage Tests

    K6 K8 K10 K20 | SERVICE MANUAL 13. DC voltage test: Remove the existing CTRL BOARD from the output stage board and insert the SERVICE CTRL BOARD. (Fig. 46) (Fig. 46) Install the two heat sink on the each voltage regulator U1, U2 as portrayed in (Fig.
  • Page 32 K6 K8 K10 K20 | SERVICE MANUAL Connect the two Zobel Resistors on the male faston connectors assembled on the output stage FA13, FA14 for channel 1 FA15, FA16 for channel 2 (Fig. 49) (Fig. 49) Connect the ribbon cable (20 pins) K AMP VOLTAGE AUX CABLE between CN14 of output stage board and the...

  • Page 33: Consumption Of The Amplifier Output Board

    K6 K8 K10 K20 | SERVICE MANUAL Consumption of the amplifier output board On the dual voltage power supply sets the output voltage at +/-18 VDC and check the current drawn by the amp board: +18 VDC approx. 0,85 A (with rail bus voltage at 0 VDC) -18 VDC approx.
  • Page 34 K6 K8 K10 K20 | SERVICE MANUAL Increase the Rail Bus voltage gradually (we suggest 5 Vdc per step) untill it reaches 30 Vdc. Verify that the consumption does not exceed 1.2 A (typical 850mA). With Rail Bus voltage at +30 Vdc, verify the consumption of the auxiliary voltages; it should be approximatively 0,11 A with spikes up to 0.15 A As portrayed in the picture below.

  • Page 35: Testing The Output Stage Drivers

    K6 K8 K10 K20 | SERVICE MANUAL Testing the output stage drivers If the results of the previous tests are sitisfactory, by means of an oscilloscope check for the presence of a square wave in all 8 highlighted points.

  • Page 36: Output Signal Presence

    K6 K8 K10 K20 | SERVICE MANUAL Output signal presence Connect a signal generator or a CD player on the CH1 and CH2 inputs of output stage board. By means of an oscilloscope, verify the presence of an audio signal on each and all of the five sense resistors assembled in vertical position on both channels.

  • Page 37: Firmware Update Procedure

    We suggest updating to the latest release all K amps DSPs you receive for service. To facilitate this, and to solve a possible “NO LINK” error, we can ship a FIRMWARE UPDATE CARD (Powersoft code PC000112). K amps WITHOUT DSP DO NOT NEED TO BE UPGRADED.

  • Page 38: Updating The Smart Card

    K6 K8 K10 K20 | SERVICE MANUAL Updating the Smart Card: By means of the PFF file and the Powersoft Firmware Updater Software it is possible to update the firmware stored into the Powersoft Firmware Update Smart Card. The PFF file is a package of firmwares for KFRONT, KCNTRL and KDSP boards of K Series or Duecanali amplifier.
  • Page 39 (Fig. 56) If 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. 57) (Fig. 57) Remember to mark the smart card according to the firmware version.

  • Page 40: Menu Diagrams

    K6 K8 K10 K20 | SERVICE MANUAL Menu Diagrams Main Menu Diagram DSP Settings...
  • Page 41 K6 K8 K10 K20 | SERVICE MANUAL 15. Copying the PAM files from a Virtual Machine 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 virtual one.

  • Page 42: Error Codes

    K6 K8 K10 K20 | SERVICE MANUAL 16. Error Codes: The error code value displayed in the main screen is the sum of Error code Error description the single error code values. 192KHz clock not present Positive 15V aux Example: 4301=4000+200+100+1 means Negative 15V aux Positive power bus Ch2 + Positive 5V analog...
  • Page 43 K6 K8 K10 K20 | SERVICE MANUAL KT000812.R KIT KT000813.R HGT DC/DC CONV KIT HGT PFC KT000810.R KT000811.R KIT KIT STD FAN STD AMP 1 CH KT000808.R KT000809.R KIT STD NO PWR KIT STD OVRVTG KT000806.R KT000807.R KIT STD DC/DC CONV KIT STD PFC KT000888.R KIT DISP.

  • Page 44: Mechanical Parts

    CB000193 PSU MAIN SWITCH CABLE ME000258 Lexan Base x KSTD & KHGT GEN 1 GEN 2 GEN 3 Fans through the various evolutions of the K Series. All are compatible and retrofittable. VN000025.R - Actual K Series Fan (Gen 3)
  • Page 45 K6 K8 K10 K20 | SERVICE MANUAL Powersoft K STD - K HGT ME000214 ME000220 ME000215 ME000219 ME000284 TA000005.00 ME000214 ME000284 ME000209 ME000212 ME000287.2 (RS485) ME000372.2 (ETH) ME000281 ME000211 ME000258 ME000213 ME000216 ME000218 ME000334 ME000210...
  • Page 46 K6 K8 K10 K20 | SERVICE MANUAL K - Series Mechanical parts “Powersoft vers.” K_STD _HGT_No _ETH version Part Number Description SM00P489.3 K_STD_HGT_Front_Rear_side Rs 485 Vers. SM00L489.3 K_STD_HGT_Platform Rs 485 Vers. K_STD _HGT_ETH version SM00P909.3 K_STD_HGT_Front_Rear_side ETH Vers. SM00P489.3 K_STD_HGT_Front_Rear_side Rs 485 Vers.
  • Page 47 K6 K8 K10 K20 | SERVICE MANUAL Martin Audio 9.6 K, 12 K, 18 K ME000324 ME000330 ME000328 ME000329 ME000284 TA000005.00 ME000324 ME000284 ME000209 ME000332 ME000333.2 (RS485) ME000281 ME000211 ME000258 ME000327 ME000216 ME000324 ME000334 ME000326...
  • Page 48 K6 K8 K10 K20 | SERVICE MANUAL K - Series Mechanical parts “Martin Audio vers.” K - STD HGT No ETH version Part Number Description SM00P919.3 MA_9.6_12_18_Front_Rear_side Rs 485 Vers. SM00L489.3 K_STD_HGT_Platform Rs 485 Vers. SM00P919.3 MA_9.6_12_18_Front_Rear_side Rs 485 Vers. Part Number Description ME000211...
  • Page 49 K6 K8 K10 K20 | SERVICE MANUAL Outline T7, T9, T11 ME000324 ME000320 ME000215 ME000319 ME000284 TA000005.00 ME000321 ME000284 ME000209 ME000322 ME000317.2 (RS485) ME000281 ME000211 ME000258 ME000213 ME000216 ME000318 ME000334 ME000210...
  • Page 50 SM00P917.3 Outline_T7_9_11_Front_Rear_side Rs 485 Vers. Part Number Description ME000211 Half rear panel ME000317.2 Outline rear black panel x Rs 485 vers. ME000284 K Series alluminium handle ME000321 Front side gray plate ME000322 Lateral plate ML000016 EMI Spring VI000112 Screw SCW|TBEI_|M3X6 SM00L489.3...
  • Page 51 K6 K8 K10 K20 | SERVICE MANUAL K - Series Mechanical parts “Void vers.” K - STD HGT No ETH version Part Number Description SM0F1059.3 VOID_Front_side SM0P1059.3 VOID_V9_Front_Rear_side ETH Vers. SM00L489.3 K_STD_HGT_Platform Rs 485 Vers. SM00L489.3 K_STD_HGT_Platform Rs 485 Vers. Part Number Description FI000021...

  • Page 52: Replacement Boards

    Live Green Earth CV000043 OP000001 *When Ordering, inform the Powersoft Customer Care about Product Serial Number and Amp Model for customization. **If the unit displays the “Check Rail Fuses” message after the FW Upgrade, please contact the Powersoft Customer Care.

  • Page 53: Kdsp Board Installation

    Screw on the same holes the brass spacers support standoff as on (Fig. 60). It is possible to retrofit the optional K-DSP on every K Series amplifier with serial number greater than 19062, older serial num- bers need to be sent to Powersoft, please contact Powersoft for further informations.

  • Page 54: Kaesop Board Installation

    Open the front panel left grid removing the screw as in (Fig. 64). It is possible to retrofit the optional KAESOP board on every K Series amplifier with serial number greater than 19062, older serial numbers need to be sent to Powersoft, please contact Powersoft for further informations.  ...
  • Page 55   K6 K8 K10 K20 | SERVICE MANUAL Once the flat cables are inserted, position the new RJ45 board Screw the brass spacers provided with the KAESOP kit. (Fig. 73) using the same black screw and brass spacer support standoff  ...
  • Page 56 Install procedure is showed in the 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 parallel manner, taking just a couple of minutes for completing the  ...
  • Page 57 K6 K8 K10 K20 | SERVICE MANUAL         Lastly, perform a Firmware update as described in the previous section.
  • Page 58 KPA 2400 MA 12K T ELEVEN K10cb MA 18K T TWENTYONE K 22 BIAS V9 OEM STEP UP PROCEDURE WARNING In order to perform the step-up procedure for OEM amplifiers, please contact Powersoft to receive a customized step up card.
  • Page 59 K6 K8 K10 K20 | SERVICE MANUAL IMPORTANT SAFETY ADDENDUM The aim of this addendum is to describe the safety precautions to be undertaken when servicing any Powersoft amplifier/module. WE RECOMMEND THAT ALL SERVICE OPERATIONS ARE CARRIED OUT BY A TRAINED TECHNICIAN IF NOT EXPLICITLY STATED OTHERWISE, DISCONNECT THE AMPLIFIER FROM THE MAINS.
  • Page 60 Intentionally left blank...
  • Page 61 Tel: +39 055 735 0230 Fax: +39 055 735 6235 General inquiries: info@powersoft.it Sales: sales@powersoft.it Application & technical support: support@powersoft.it Service & maintenance: service@powersoft.it powersoft-audio.com Data are subject to change without notice. For latest update please refer to the online version available on www.powersoft-audio.com...

This manual is also suitable for:

K6K8K10K20

Table of Contents

Save PDF