Yamaha PSR-410 [8/11] 4 keyboard coimtact point test

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PSR 410 PSR 510 3 4 KEYBOARD COIMTACT POINT TEST Play scales Tonal color will change depending on the velocity MODE 2 HOW TO ENTER THE TEST PROGRAM Velocity Tonal color While holding down three white keys on the right end of the keyboard C6 B5 and A5 turn on the power The test proceeds automatically 1 10 11 128 127 CLICK Sine wave CLICK TEST 0 CPU IC1 H8 510 IRQ 0 INTERRUPT REQUEST OPERATING TEST As you play the keyboard the MULTI DISPLAY will show the corresponding velocities 1 127 If a sine wave is generated this item passes the test If not this item fails the test At the same time MIDI note ON OFF messages for the note number at the same pitch as the sine wave are transmitted via Channel 2 The CLICK sound will appear in Channel 10 When the test program is started if there is an IRQ 0 detection flag and there is irregular data an ErO error will be displayed If this happens turn the machine s power off After turning the power off then on again execute the data comparison operation test and check the IRQ 0 detection flag by overwriting the irregular data in the IRQ 0 detection flag and restarting the test program Error ErO 3 5 DSP IC 10 TEST The sounds from the keyboard are generated through the DSP IC If the DSP is defective the sound played from the keyboard may be distorted or muted 3 6 MIDI IN OUT TEST Connect the MIDI IN and MIDI OUT connectors using the MIDI cable A sine wave at a pitch of A3 and A4 should be generated alternately with a cycle of 250msec for voicing and muting 3 7 ROTARY ENCODER TEST If the rotary encoder is detected to turn one round the number of turns will be shown on the MULTI DISPLAY Turning the encoder clockwise will increase the number and turn ing it counter clockwise will decrease the number When the test program is first started will be displayed However if when the turned off and on again and the test restarted but the error is not displayed is operating normally the error power is program again it TEST 1 KEYBOARD DETECT CPU TEST The display will show 1 during the test Check to see if data is sent from the CPU for touch detection If data is not sent or if abnormal data is sent an er ror occurs If keyboard contact detection is abnormal the system does not enter test mode Correct operation indicates that the selected test mode has been entered Error Er1 TEST 4 ROM VERSION INDICATION Pressing the following switches will show the ROM versions on the MULTI DISPLAY ROM Integer Decimal Program IC4 Style IC3 Tone generator IC7 PAGE switch STYLE switch VOICE switch MIDI BULK DUMP AUTO ACCOMP KEYBOARD PERCUSSION IC3 style program has been included in IC4 on the half way of the production and IC3 will be deleted PSR 510 only END OF TEST The test is ended when you turn off the power TEST 2 CPU PERIPHERAL TEST 2 1 RAM IC5 6 TEST The display will show 2 during the test Particular data is written for all RAM addresses and the content of the addresses is read to com pare with the written data Error Er2 Even when an error is indicated you can pro ceed to the next test by pressing the RESET key However RAM will not be operative and the test operation quality is not guaranteed 32

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Здравствуйте! У моего синтезатора Yamaha PSR-410 странная проблема:1) Джойстик PitchBend при понижении тона работает нормально , а в сторону повышения тона идёт рывками. Замена резистора на исправный (проверен на другом устройстве) показало, что неисправность сохранилась. Есть подозрение на проблемы АЦП процессора.2) При отключенном автоаккомпанементе гармонический ряд звуков правильный, но при включении автоаккомпанемента партия левой руки ( автоаккомпанемента воспроизводится на полтона ниже. Встроенные тесты ( описаны в сервис мануале) проходят частично. и зависают. Есть подозрения либо на сбой в ППЗУ автоаккомпанемента, либо в процессоре.Может кто сталкивался с такими проблемами? Где искать проблему? Может есть у кого дамп ППЗУ ПСР410? для сравнения с тем, что записано в памяти моего инструмента?Возможно кто-то может одолжить материнку от ПСР410 для проверки исправности остальных плат, например контроллера клавиатуры?
2 года назад