GEM_pRP6,_7,_8_Baldwin_Service_Manual 电路图.pdf

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1、1 Index Soldering point. Male connector. Female connector. M/F faston connector. Test point. Supply voltage.Logic supply ground. Analog supply ground. Chassis ground. Earth ground. Flag joined with one or more flags GENERALMUSIC S.p.A. Sales Division: 47842 S.Giovanni in Marignano (RN) ITALY - Via d

2、elle Rose, 12 Phone +39(0)541/959511 - Fax +39(0)541/957404 - GENERALMUSIC on the NET: pRP6, pRP7 and pRP8 Test Procedures. pRP6 Opening Instructions. pRP7 and pRP8 Opening Instructions. 2 pRP7 and pRP8 Block Diagrams. 3 Timing Table, pRP6 Block Diagram.5 6 L/R Contact, Keyboard Interface Board. 7Co

3、ntrols Panel and Display Boards, I/O Amplifier & Supply Boards. 8 pRP7 and pRP8 Cpu & Sound Generator Board. 9 10 11Spare Part List. pRP6 Cpu & Sound Generator Board. 4 SERVICE MANUAL CODE: 270245 Warnings with the same signal name inscribed. Address ATTENTIONObserve precautions when handling electr

4、ostatic sensitive devices. Notice Service must be carried out by qualified personnel only. Any tampering carried out by unqualified personnel during the guarantee period will forfeit the right to guarantee. For a correct operation of the instrument, after having switched off, be careful to wait at l

5、east 3 seconds before switching on again. To improve the devices specifications, the schematic diagrams may be subject to change without prior notice. All components marked by this symbol have special safety characteristics, when replacing any of these components use only manufacturers specified par

6、ts. The () micro symbol of capacitance value is substituted by U. The () omega symbol of resistance value is substituted by E. The electrolytic capacitors are 25Vdc rated voltage unless otherwise specified. All resistors are 1/8W unless otherwise specified. All switches shown in the OFF position. Al

7、l DC voltages measured to ground with a voltmeter 20KOhm/V. ? 1st edition december 2000 RadioFans.CN 收音机爱 好者资料库 2 APP. CKD DRW REV: DISK: DWG# PRT: PCB#GENERALMUSIC S.p.A. ITALY ALL RIGHTS ARE RESERVED, NO COPIES WRITTEN CONSENT BY GENERALMUSIC. OR REPRODUCE THIS DOCUMENT WITHOUT BOCCATO VITRI MORBI

8、DI 500932 1/1 21/12/00 PRP6 OPENING INSTRUCTIONS pRP6 Opening Instructions Fig.1 Unscrew the 9 fixing screws (A) and move the front panel towards you and lift it up .Fig.2 To remove the keyboard unscrew the 10 fixing screws (B) underneath it. Fig.3 To remove the keyboard lift it up some centimeters

9、from the left end only, shift it to the left how it is suf- ficient to free the right side and extract it entirely. Note: The attraction of the speaker magnetic core can cause some difficulty. Fig.4 BE CAREFUL: disconnect the keyboard cable (C) without forcing it when you remove the keyboard, to con

10、nect the keyboard out of the chassis is needed a longest cable (GM ordering code 840532). A A A A A A A A A B B B B C RadioFans.CN 收音机爱 好者资料库 3 APP. CKD DRW REV: DISK: DWG# PRT: PCB#GENERALMUSIC S.p.A. ITALY ALL RIGHTS ARE RESERVED, NO COPIES WRITTEN CONSENT BY GENERALMUSIC. OR REPRODUCE THIS DOCUME

11、NT WITHOUT BOCCATO VITRI MORBIDI 500933 1/1 22/12/00 PRP7/8 OPENING INSTRUCTIONS pRP7 Opening Instructions Fig.1 Unscrew the 9 fixing screws (A) and move the front panel towards you and lift it up .Fig.2 To remove the keyboard unscrew the 11 fixing screws (B) underneath it. A A A A A A A A A B B B p

12、RP8 Opening Instructions Fig.1 Unscrew the 9 fixing screws (A) and move the front panel towards you and lift it up .Fig.2 To remove the keyboard unscrew the 11 fixing screws (B) underneath it. A A A A A A A AA B B B RadioFans.CN 收音机爱 好者资料库 4 pRP6 TEST PROCEDURE This procedure are not intended to rep

13、air a fault but only to check the proper instrument operations after a repairing execution. The procedures that follow must be executed in the order specified. Instrument and Tools 1)Dual trace oscilloscope (Note: the Oscilloscope must be earth insulated). 2)Sinusoidal signal generator. 3)Digital Mu

14、ltimeter. 4)N.1 Midi cable. 5)N.1 Stereo jack plug. 6)N.2 Mono jack plug. Setup ?Insert the mono jacks into the LEFT and RIGHT OUTPUTS. ?Check jumper positions: for pRP6 none must be shorted. Supplies Check ?Check with the Multimeter the following voltages on Cpu & Sound Generator Board: ?Switch off

15、 CN7 pin1-4 = +3.6Vdc (+VBAT for memory backup) ?Switch on CN7 pin1-4 = +4.8Vdc (+VBAT for battery recharging) CN7 pin1-5 = +5Vdc (+5VB for analog DAC supply) CN8 pin2-4 = +5Vdc (+5V for digital supply) Memory and System Reset ?To Re-set the instrument press the two SOUND/DATA buttons while holding

16、pressed the GRAND PIANO button. The Led turns off and after some seconds lights on again. This operation clear all data in memory. Speakers Check ?Press and hold C6 note key and then GRAND PIANO and SOUND/DATA UP buttons: playing a note (OBOE preset) it must be heard from right speaker. ?Press and h

17、old D6 note key and then GRAND PIANO and SOUND/DATA UP buttons: playing a note (OBOE preset) it must be heard from left speaker. Right & Left Output Levels Check Check the levels as follow: ?Set the VOLUME at max. ?Connect the probes of the oscilloscope between the pins of the speakers, set them at

18、1ms/div. 5V/div. ?Press and hold E6 note key then GRAND PIANO and SOUND/DATA UP button: Play the C5 note (OBOE preset) with the maximum dynamic, the note must be heard from each speaker without distortions or oscillations, the level displayed on the oscilloscope screen must be 17.51Vpp. ?Connect the

19、 two probe tips of the oscilloscope to the tip and ring contacts of the stereo jack plug plugged into PHONES and a ground clip to the sleeve of the same jack plug, set it at 1ms/div. 1V/div. ?Play the C5 note with the maximum dynamic, the level displayed on the oscilloscope screen must be 4.20.1Vpp.

20、 ?Connect the first trace of the oscilloscope to the tip and sleeve contacts of the mono jack plugged into RIGHT OUTPUT, set it at 1ms/div. 0.5V/div. ?Connect the other trace of the oscilloscope to the tip and sleeve contacts of the stereo jack plugged into LEFT OUTPUT, set it at 1ms/div. 0.5V/div.

21、?Play the C5 note with the maximum dynamic, the level displayed on the oscilloscope screen must be 1.60.2Vpp. Right & Left Inputs Levels Check Check the levels as follow: ?Set the sinusoidal generator at 1KHz 400mVpp. ?Connect the generator to the RIGHT INPUT. ?Set the oscilloscope at 2ms/div. 0.2V/

22、div. ?A sinusoidal signal of 10.1Vpp must be showed on the scope screen. ?Also check the LEFT INPUT. Pedals Check ?Plug the switch pedals into the DAMPER JACK socket, press down the pedal and then press a note key: the instrument plays the note, release the note key and the sound holds on, release t

23、he pedal and the sound shuts off. ?Plug the switch pedals into the PEDAL JACK socket, press a note key while pressing the pedal the sound is more soft. Midi In/Out Check ?Set the Local Off pressing and holding F7 note key and then SOUND/DATA DOWN button. ?Playing some notes you do not hear sound, co

24、nnect the midi cable between MIDI IN and OUT sockets, play again and now the instrument sound. ?Restore the Local On pressing and holding F7 note key and then SOUND/DATA UP button. Reliability Check Before reassembling the instrument and before return it to the user, it is a goal verify its reliabil

25、ity: Leaving it switched on and operating with greatest caution, carefully shake the boards and connections using an insulated tool to find faulty contacts, bad solderings and so on, at the same time verify the instrument working. Start the Demo pressing SOUND/DATA DOWN and SOUND/DATA UP simultaneou

26、sly, leave it switched on for a long time verifing its functionality occasionnally. pRP7 TEST PROCEDURE This procedure are not intended to repair a fault but only to check the proper instrument operations after a repairing execution. The procedures that follow must be executed in the order specified

27、. Instrument and Tools 1)Dual trace oscilloscope (Note: the Oscilloscope must be earth insulated). 2)Sinusoidal signal generator. 3)Digital Multimeter. 4)N.1 Midi cable. 5)N.1 Stereo jack plug. 6)N.2 Mono jack plug. Setup ?Insert the mono jacks into the LEFT and RIGHT OUTPUTS. ?Check jumper position

28、s: for pRP7 J3 is shorted and J2 is open. Supplies Check ?Check with the Multimeter the following voltages on Cpu & Sound Generator Board: ?Switch off CN7 pin1-4 = +3.6Vdc (+VBAT for memory backup) ?Switch on CN7 pin1-4 = +4.8Vdc (+VBAT for battery recharging) CN7 pin1-5 = +5Vdc (+5VB for analog DAC

29、 supply) CN8 pin2-4 = +5Vdc (+5V for digital supply) Memory and System Reset ?To Re-set the instrument press the two SOUND/VARIATIONS buttons while holding pressed the GRAND PIANO button. All Leds turn off and after some seconds light on again. This operation clear all data in memory. Speakers Check

30、 ?Press and hold A6 note key and then GRAND PIANO and TEMPO/DATA UP buttons: playing a note (OBOE preset) it must be heard from right speaker. ?Press and hold G6 note key and then GRAND PIANO and TEMPO/DATA UP buttons: playing a note (OBOE preset) it must be heard from left speaker. Right & Left Out

31、put Levels Check Check the levels as follow: ?Set the VOLUME at max. ?Connect the two probe tips of the oscilloscope to the tip and ring contacts of the stereo jack plug plugged into PHONES and a ground clip to the sleeve of the same jack plug, set it at 1ms/div. 1V/div. ?Press and hold B6 note key

32、then GRAND PIANO and TEMPO/DATA UP button: Play the C5 note (OBOE preset) with the maximum dynamic, the level displayed on the oscilloscope screen must be 4.20.1Vpp. ?Connect the first trace of the oscilloscope to the tip and sleeve contacts of the mono jack plugged into RIGHT OUTPUT, set it at 1ms/

33、div. 0.5V/div. ?Connect the other trace of the oscilloscope to the tip and sleeve contacts of the stereo jack plugged into LEFT OUTPUT, set it at 1ms/div. 0.5V/div. ?Play the C5 note with the maximum dynamic, the level displayed on the oscilloscope screen must be 1.60.2Vpp. Right & Left Inputs Level

34、s Check Check the levels as follow: ?Set the sinusoidal generator at 1KHz 400mVpp. ?Connect the generator to the RIGHT INPUT. ?Set the oscilloscope at 2ms/div. 0.2V/div. ?A sinusoidal signal of 10.1Vpp must be showed on the scope screen. ?Also check the LEFT INPUT. Pedals Check ?Plug the switch peda

35、ls into the DAMPER JACK socket, press down the pedal and then press a note key: the instrument plays the note, release the note key and the sound holds on, release the pedal and the sound shuts off. ?Plug the switch pedals into the PEDAL JACK socket, press a note key while pressing the pedal the sou

36、nd is more soft. Midi In/Out Check ?Set the Local Off pressing and holding B7 note key and then TEMPO/DATA DOWN button. ?Playing some notes you do not hear sound, connect the midi cable between MIDI IN and OUT sockets, play again and now the instrument sound. ?Restore the Local On pressing and holdi

37、ng B7 note key and then TEMPO/DATA UP button. Reliability Check Before reassembling the instrument and before return it to the user, it is a goal verify its reliability: Leaving it switched on and operating with greatest caution, carefully shake the boards and connections using an insulated tool to

38、find faulty contacts, bad solderings and so on, at the same time verify the instrument working. Start the Demo pressing the two SOUND/VARIATIONS buttons simultaneously, finally leave it switched on for a long time verifing its functionality occasionnally. pRP8 TEST PROCEDURE This procedure are not i

39、ntended to repair a fault but only to check the proper instrument operations after a repairing execution. The procedures that follow must be executed in the order specified. Instrument and Tools 1)Dual trace oscilloscope (Note: the Oscilloscope must be earth insulated). 2)Sinusoidal signal generator

40、. 3)Digital Multimeter. 4)N.1 Midi cable. 5)N.1 Stereo jack plug. 6)N.2 Mono jack plug. Setup ?Insert the mono jacks into the LEFT and RIGHT OUTPUTS. ?Check jumper positions: for pRP8 J2 is shorted and J3 is open. Supplies Check ?Check with the Multimeter the following voltages on Cpu & Sound Genera

41、tor Board: ?Switch off CN7 pin1-4 = +3.6Vdc (+VBAT for memory backup) ?Switch on CN7 pin1-4 = +4.8Vdc (+VBAT for battery recharging) CN7 pin1-5 = +5Vdc (+5VB for analog DAC supply) CN8 pin2-4 = +5Vdc (+5V for digital supply) Memory and System Reset ?To Re-set the instrument press the two SOUND/VARIA

42、TIONS buttons while holding pressed the GRAND PIANO button. All Leds turn off and after some seconds light on again. This operation clear all data in memory. Speakers Check ?Press and hold A6 note key and then GRAND PIANO and TEMPO/DATA UP buttons: playing a note (OBOE preset) it must be heard from

43、right speaker. ?Press and hold G6 note key and then GRAND PIANO and TEMPO/DATA UP buttons: playing a note (OBOE preset) it must be heard from left speaker. Right & Left Output Levels Check Check the levels as follow: ?Set the VOLUME at max. ?Connect the probes of the oscilloscope between the pins of

44、 the speakers, set them at 1ms/div. 5V/div. ?Press and hold B6 note key then GRAND PIANO and TEMPO/DATA UP button: Play the C5 note (OBOE preset) with the maximum dynamic, the note must be heard from each speaker without distortions or oscillations, the level displayed on the oscilloscope screen mus

45、t be 17.51Vpp. ?Connect the two probe tips of the oscilloscope to the tip and ring contacts of the stereo jack plug plugged into PHONES and a ground clip to the sleeve of the same jack plug, set it at 1ms/div. 1V/div. ?Play the C5 note with the maximum dynamic, the level displayed on the oscilloscop

46、e screen must be 4.20.1Vpp. ?Connect the first trace of the oscilloscope to the tip and sleeve contacts of the mono jack plugged into RIGHT OUTPUT, set it at 1ms/div. 0.5V/div. ?Connect the other trace of the oscilloscope to the tip and sleeve contacts of the stereo jack plugged into LEFT OUTPUT, se

47、t it at 1ms/div. 0.5V/div. ?Play the C5 note with the maximum dynamic, the level displayed on the oscilloscope screen must be 1.60.2Vpp. Right & Left Inputs Levels Check Check the levels as follow: ?Set the sinusoidal generator at 1KHz 400mVpp. ?Connect the generator to the RIGHT INPUT. ?Set the osc

48、illoscope at 2ms/div. 0.2V/div. ?A sinusoidal signal of 10.1Vpp must be showed on the scope screen. ?Also check the LEFT INPUT. Pedals Check ?Plug the switch pedals into the DAMPER JACK socket, press down the pedal and then press a note key: the instrument plays the note, release the note key and th

49、e sound holds on, release the pedal and the sound shuts off. ?Plug the switch pedals into the PEDAL JACK socket, press a note key while pressing the pedal the sound is more soft. Midi In/Out Check ?Set the Local Off pressing and holding B7 note key and then TEMPO/DATA DOWN button. ?Playing some notes you do not hear sound, connect the midi cable between MIDI IN and OUT sockets, play again and now the instrument sound. ?Restore the Local On pressing and holding B7 note key and then TEMPO/DATA UP button. Reliability Check Before reassembling the instru