Clavia_Nord_Electro_2_Service_Manual 电路图.pdf

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1、Rev. 1.0 2005-06-10 Page 1/5 Nord Electro 2 Service Manual Revision history Rev. 1.0 First release. Overview There are three different Nord Electro 2 models: - 61 note keyboard version - 73 note keyboard version - rack version Uploading OS and sounds The operating system and sampled sounds are store

2、d in FLASH circuits on the main board. For information on how to update the OS and uploading sounds, visit www.clavia.se. Click on Products/Nord Electro 2 and then choose either ”free software” or ”free sounds”. Returning to factory settings It is not possible to return to factory settings without c

3、onnecting the Nord Electro to a computer. Once connected, you can dump the factory settings and the latest OS. Visit http:/www.clavia.se for details. Running the test program The test program is stored in an EPROM located in position U17. If the version is older than 0.20, there is no test program i

4、s available. To find out which EPROM version that is installed, the Nord Electro needs to be opened. In order to trace a hardware error easier, each Nord synthesizer has a test program. This program is primarily used in production in order to test all functions. However, any user can access the test

5、 program by holding down certain buttons at power up. The functions provided by the test program allow a quick and easy search for possible errors in the hardware. Test results are shown on the Electros display. If a test is successful, the display reads ”rd”. If errors are detected, en error code i

6、s shown in the display. The error codes are listed under the section ”Error codes” at the end of this document. Rack version 63 note keyboard version 73 note keyboard version RadioFans.CN 收音机爱 好者资料库 Rev. 1.0 2005-06-10 Page 2/5 WARNING: Improper use of the test program can result in malfunctioning o

7、f the synth. It may only be used by qualified service personnel and is not intended for end users. In order to execute the different tests on a Nord Electro 2, press and hold at power up. All LEDs and the display should now be lit. After finishing each test successfully, the test program jumps forwa

8、rd to the next step. The active test is shown in the display. To toggle manually between tests, press or . Checking the LEDs and buttons Press all buttons to switch off the LEDs. Once switched off, they can not be switched on again without restarting the test. Switching off all LEDs makes the test j

9、ump forward to the next stage. Checking the knobs Turning a knob from fully counter clockwise to fully clockwise should generate a value between 0 and 7F, respectively. The value is shown in the display. It should change linearly with the potentiometer travel. Turning each knob fully counter clockwi

10、se to fully clockwise makes the test jump forward to the next stage. Checking the keyboard Press one key at a time to check its function. If a ”note on” message from that key is detected, the display counts up one step. When all keys are pressed, the test jumps forward to the next stage. This test d

11、oes not report velocity response. Checking the pedal inputs Connect a sustain pedal to the sustain pedal input, a switch pedal to the Rotor speed input and a control or volume pedal to the Control pedal input. Pressing and releasing the sustain pedal should generate values 0 and 7F, shown in the dis

12、play. This applies to the Rotor speed input as well. Rocking the control pedal back and forth should generate values between 0 and 7F, shown in the display. For Yamaha control pedals, you have to switch the tip and ring signals for the pedal to work properly with the Electro 2. See this document: ht

13、tp:/www.clavia.se/nordelectro/fc7_modification.htm. To make the test jump forward to the next stage, unplug all pedals and then reconnect and unplug the control pedal. Checking the DAC This test should output a clean sine wave on the left (d1) and right (d2) outputs. Toggle the output with . Adjust

14、the volume with the volume knob. If the output is distorted, try adjusting the trim pots found in the lower left corner of the main board (VR2 for left output, VR1 for right) with a non conductive (ceramic) screwdriver. RadioFans.CN 收音机爱 好者资料库 Rev. 1.0 2005-06-10 Page 3/5 Hardware structure The hard

15、ware is common for all three products; one power supply unit, one main board and one panel board. Power Supply The Nord Electro is supplied internally with several different voltages. These are +3.3 V, 5 V and 12 V. For more information on where to measure these voltages, see the schematic for the p

16、ower supply. The fuse should be 300 mA for a 115 V and a 100 V supply, and 125 mA for a 230 V supply. Main board The main board is equipped with four DSPs (U16-U19), which are controlled by a host processor (U14) with two RAM circuits (U9-U10, 128k*8 bits each). The code for the host processor is st

17、ored in an EPROM (U17). OS and sampled sounds (all sounds except organ) are stored in four FLASH circuits (U1- U4, 4M*16 bits each). Audio D/A conversion is done by U20. A/D conversion of the control pedal takes place on the panel board (see schematic for details). All input and output jacks are fil

18、tered from radio signals with an EMI-filter. External jacks are a 26 pole connector for the panel board, a 10 pole connector for the power supply unit and two keyboard connectors. Panel Board On the panel board you will find all control functions of the Nord Electro. It is also on the panel board th

19、at the model of the Nord Electro is hardware configured. See section ”How to configure keyboard or rack version” for details. The panel board is connected to the main board with a 26 pole ribbon cable. It is through this cable the panel board gets its current supply. How to detach the circuit boards

20、 WARNING: Take necessary precautions against ESD before handling the circuit boards. Opening the synth Keyboard version: Loosen the screws as shown in the figure below. Lift the front of the wooden ends to open the top. The picture shows which screws that should be removed on a Nord Electro 73 key v

21、ersion. For the 63 key version, the two screws close to each other at the top of the picture does not exist. RadioFans.CN 收音机爱 好者资料库 Rev. 1.0 2005-06-10 Page 4/5 Rack version Loosen the two screws on the back side and the two screws on the front side that holds the top to the chassis. You can now li

22、ft off the top. Removing the Power Supply Unit Loosen the five screws holding the PSU to the chassis. Loosen the two screws on the back panel next to the AC inlet. Finally remove the 10 pole ribbon cable connector and lift out the PSU. Removing the Main Board Loosen the four screws holding the main

23、board to the chassis. Loosen the nuts and remove the washers around the ” jacks on the back panel. Also loosen the four screws holding the MIDI IN and OUT jacks to the chassis. Remove the 26 pole ribbon cable connector to the panel board, the 10 pole ribbon cable connector to the PSU and the two rib

24、bon cable connectors to the keyboard. You can now lift out the main board. Removing the Panel Board Pull off all knobs on the front panel (not the buttons). Remove the ribbon cable connector from the panel board. Loosen the last two screws holding the top to the chassis. Loosen the nine screws holdi

25、ng the panel board to the top. You can now lift out the panel board. How to configure keyboard or rack version The model of a Nord Electro (61, 73, rack) is decided by two 0 (zero) ohm resistors (R50, R51) found in the lower left corner of the panel board. In order to reach the resistors, the panel

26、board needs to be detached. If the panel board is not properly configured, you get problems like: - High notes trig low notes or notes are trigged randomly. - Keyboard not working at all. - Buttons affect other parameters. The configuration scheme is: Zero ohm resistor in position R50 R51 Electro 61

27、 No No Electro 73 Yes No Electro rack No Yes The picture to the right shows how a panel board for a Nord Electro 73 key version should be configured. Rev. 1.0 2005-06-10 Page 5/5 Updating the software The software version is briefly shown in the display when you power on the Nord Electro/Electro 2.

28、For more information on how to update the software, visit http:/www.clavia.se. Known or common errors Many of the errors that occur can be related to the improper use of the synthesizer. Before it can be established that a hardware error has occurred, check the manual and the FAQ on www.clavia.se fo

29、r information. In some cases an error can be cured by updating the software. See www.clavia.se for more information on how to update the software. If the possibility of a software error can be excluded, check the following: - Is the fuse blown? Many times the problem can be as simple as that. Also c

30、heck the power rating on the back panel to make sure that it complies with your country. - Does all voltages appear on the power supply unit/main board? For information on where to measure the different voltages, see the schematic. - Is there a bad connection? Check all ribbon cables and connectors

31、to see that they are fixed in their respective positions. - Is there a bad solder joint? A bad solder joint might be difficult to discover on surface mount components, but should be easy to find on hole mount components like jacks and connectors. - Are all components and connectors in good condition

32、? Inspect the card to see if the problem can be detected visually. - In general, some types of errors that are hard to trace might be cured by cleaning the board with an electronic cleaning solvent. Sometimes this can remove conductive debris that shorts out tightly spaced component pins. It might a

33、lso help to gently scratch the surface between component pins with a scalpel or a similar fine tipped instrument in order to remove debris. The above list is by no means complete, but it can give an indication on where the problem might be located. Input or output jacks not working The Nord Electro

34、is built with high quality components and the circuit boards are well protected in a steel chassis to withstand physical strain. However, input and output jacks are exposed to possible damage, for example when dropping the synth. If a jack is not working, check the EMI-filter for that jack too see t

35、hat it conducts. Use a multimeter or other appropriate equipment to measure conductance. Measure at the outer ends of the EMI-filter. See the schematic for details on where to find the EMI-filter for each jack. Also check for bad solder joints or cracks in the PCB. Display shows E7 This error code i

36、ndicates that there are errors on the software in FLASH. The problem can be cured by updating the software to the latest version. The software is uploaded via MIDI with an update program that can be downloaded at www.clavia.se. Follow the instructions as displayed by the program. In some cases, this

37、 might not cure the problem. Some keys not working or one key trigs several notes This problem is most likely to occur if circuits U5, U12 and U29 on the main board are faulty. Inspect them visually to see if any of them seem to be in bad condition. A A B B C C D D E E 44 33 22 11 RESET 1 ROTOR PEDA

38、L Plottscale:0.665 stende silent gnd DSP clk MIDI IN silent gnd silent gnd MIDI OUT SUSTAIN PEDAL silent gnd CONTROL PEDAL INPUT mountingholes 4.8mm plated CONNECTOR POWER JTAG con silent gnd silent gnd silent gnd RESET 0 Connector Connector Panel Keyboard Connector Keyboard PCB=2R-J1399-020125 Rev.

39、history: v0.99-v1.00: delete R65 Y2 changed to MA505/506 1 Nord electro main board vers 1.00 A2 11Friday, January 25, 2002 Title SizeDocument NumberRev Date:Sheet of SA20 SA19 SA18 SA17 SA16 SD17 SA23 SA21 SD23 SD19 SA22 SA22 SD10 SA12 SA11 SD20 WR SD13 SD9 SA17 SA2 SA19 SA17SA17 SD8 SD14 SA13 SA14

40、SA9 SD11 SA10 SA3 SA2 SA15 SA12 SA11 SA19 SD17 SD17 SD8 SA6 SD14 SD14 SA4 SD18 SD21 SA5 RD SD11 SD9 SD22 SD15 SA3 SA7 SD16 SD16 SD12 SA8 SD23 SD19 SD10 SD15 SD12 SA7 SA19 SD13 SA23 SD8 SD18 WR SD21 SD20 SD11 SD22 SA21 SD15 SA2SA2 SD23 SD19 SD18 SA21 SD13 SD17 SD18 SD20 SD20 RD SD22 SD16 SD12 SD23 SD

41、10 SD8 SA12 SD8 SD8 SD14 SD18 SD18 SA13SA13 SA14 SD21SD21 SD11 SD11 SD16 SA12 SA11 SD22 SA18 SD8 RD SD22 SD15 SA2 SD10 SA8 SA20 SA19 SA17 SD21 SD20 SD22 SD23SD23 SD19 SD19 SD10 SA15 SA20 SD14 SA4 SA4 SD18 SD15 SD16 SD19 SA22 SD10 SA15 SA11 WR RD RD SA9 SD9 SD22 SD15 SA2 SA12 SD23 SD19 SD11 SA20 SA20

42、 SA19SA19 SA19 SA18SA18 SA18 SD13 SA17 SA17 SA16 SA16 SD17 SD17 SA23 SA23 SD8 SA6 SD14 SA4 SA4 SD18 SA13 SA13 SA14 SA14 SD21 SA5 RD SA9 SD11 SD9SD9 SA10 SA21 SA21 SD15 SA3 SA7 SD16 SD12SD12 SA8 SA22 SA22 SD10 SA15 SA15 SA15 SA12 SA11 SD10 SA3 SA20 SA18 SD13 SD17 SA23 SD8 SA6 SD14 SA4 SD18 WR WR SD21

43、 SA5SA5 SD20 SD11 SD9SD9 SD22 SA21SA21 SD15 SA3 SA2 SD16 SD12 SA8 SD23 SD19 SA22 SD10 SD16 SA22 SA13 SA10 SA20 SD13 SA16 SA6 SA6 SD14 SD14 SA4 SA13 SA5 SD20 SD9 SD22 SD15 SA3 SA7 SA7 SD12 SA8 SA15 SA18 SD13 SA17 SA16 SA6 SA6 SA4 SA13 SA14SA14 SA5 SA5 SA5 SA9 SA9SA9 SD11 SA10 SA10SA10 SA3 SA3 SA2 SA7

44、 SA7 SD16 SA8 SA8SA8 SA15 SA12 SA12 SA11 SA11SA11 SD17 SA23 RD SA16 SA9 SA20 SA17 SA6 SA13 WR WR SA14 SA14 SD21 RD SA10 SA21 SA7 SA8 SA15 SA11 SD21 SA6 SA5 SA18 SA20 SA16 SA23 RD SA9 SA10SA10 SA3 SA7 SD12 SD19 SA12 SA14 SD13 SD13 SA16 SA16 SD17 SA23 SA23 WR WR SD20SD20 SA9 SD9 SA21 SA2 SD12 SD23 SA2

45、2 SA22 SA4 SA19 SA18 S2 S0 SA1 S1 S1S3 S2 S0S3 S0 S1 S2 S3 SA0 SA0 SA1 D10 A4 A6 D8 D4 D12 D13 A1 D9 A6 D8 D15 D1 D13 D15 D15 D10 CS3 A12 A6 BOOTD7 A2 CS5 A8 D12 A9 CS7 D3 D2 D9 D13 D4 D6 A5 A7 A15 CS1 D9 A16 A11 D14 D14 A10 D0 D14 D8 D11 D4 D13 D11 D15 A17 CS10 A11 A10 D3 A3 D8D8 CS4 A13 D6 D15 A13

46、 D13 A17 CS4 A16 A14 A6 A9 D10 A0 A4 CS1 A11 D8 D11 D14 A2 D9 D9 D12 D13 D10 D10 D11 A5 D12 CS10 CS9 D5 A16 A5 D10 D13 A16 CS2 D10 D0 CS0 A1 D9 A0 A0 D0 A4 A4 CS3 A2 A15 A12 CS8 A14 A7 CS1 A13 A15 R/W D14 D12 D8 D0 D11 A11 A1 A10 A1 D7 A17 A5 A9 A9 D1 D14 A1 D15 D11 CS7 A14 A2 D12CS8 A8 D8 A7 D9 D8

47、D15 D2 D12 D7 BOOT A2 D14 D5 D9 A12 A13 A3 D13 R/W A0 D6 A10 A3 A1 CS0 A14 D11 A8 A2 CS0 D5 D11 A7 A0 A4 CS9 D9 D14 A1 A12 A3 CS10 CS5 A2 A0 A8 CS2 D10 D1 D15 R/W D2 D3 A15 A3 D0 D1 D2 D3 D4 D5 D6 D7 CS6 CS6 D12 +5V -5V -5V -5V +3.3V +5V +5V +5V +5V +5V +5V +5V +3.3V +3.3V +3.3V+5V +3.3V +3.3V +3.3V

48、 +3.3V +5V +3.3V +3.3V +3.3V +5V +3.3V +5V +5V +3.3V +5V +5V +3.3V +3.3V +3.3V +3.3V +3.3V +3.3V +3.3V+3.3V+3.3V +3.3V -5V +5V+3.3V -12V -12V +12V+5V -12V -12V +12V +12V -12V -12V +3.3V -12V +3.3V +3.3V +12V +12V +12V +12V +3.3V+3.3V +5V +5V +5V+5V +5V +5V +5V +5V +5V +5V +5V +5V +5V +5V Q9 BC857 SO

49、T23 U28D 74HC32 soic 12 13 11 R53 220 C50 0.1u C32 0.1u U18 X24C16 1 2 3 4 5 6 7 8 A0 A1 A2 GND SDA SCL test Vcc U5 74HC374 TSSOP 3 4 7 8 13 14 17 18 1 11 2 5 6 9 12 15 16 19 D0 D1 D2 D3 D4 D5 D6 D7 OC CLK Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 D1 BAV70 13 2 C33 0.1u C6220n C27 0.1u C18 0.1u C46 0.1u C10470p power grounds powerpins+3V U7 DSP56362 12 72 4 73 13 3 14 28 76 27 15 17 77 78 79 82 83 84 85 88 89 92 93 94 97 98 99 33 31 32 30 21 100 101 102 105 106 107 108 109 110 113 11