Boss_me30 电路图 维修原理图.pdf

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1、Aug, 1997ME-30 TABLE OF CONTENTS目次Page SPECIFICATIONS 主仕様 LOCATION OF CONTROLS 配置図 EXPLODED VIEW 分解図 PARTS LIST LOADING FACTORY PRESET DATA 工場出荷復帰方法 TEST MODE 12 IC DATA IC 13 BLOCK DIAGRAM 図 13 CIRCUIT DIAGRAM from MODE 1 to MODE 6. Use whichever appropriate for your situation. CAUTION ! The user d

2、ata cannot be saved to a sequencer via MIDI. Inform the user of this fact upon receiving a service request. The test program will stop upon detecting a failure component or circuit, and may not proceed to the next step. After taking a corrective action, restart the test program from the beginning. C

3、onnection to OUTPUTs: Unless otherwise specifically instructed, channels L and R are independently monitored: first connect the plug from the measuring instrument (oscilloscope or noise meter, whichever appropriate) into OUTPUT R, next, replace the instrument plug with a blank (open) plug and then c

4、onnect the instrument to OUTPUT L. Note that the channel R signal is connected to the OUTPUT L socket through the switch on the OUTPUT R socket. To obtain pure L channel signal, the R socket switch must be turned off. 電源。 USER/PRESET Key , PHRASE TRAINER ON/OFF Key 同時押電源。 LCD 表示。 電源、抜。 注意！ 他 使用保存出来。

5、 予修理依頼客様、旨連絡下 願致。 電源。 PARAMETER_R Key , VALUE - Key 同時押 電源。 LCD PRESET 表示。 WRITE/COPY Key 押 LCD WRITE 文 字点滅。 初期化終了、通常電源投入時同状 態。 初期化中止、電源 下。 、 、通。 状況応使分下。 注意！ 他 使用保存出来。 予修理依頼客様、旨連絡下 願致。 不良次進事 出来、修理行。 修理後、最初再度行 。 単体使用 場合、 , 信号内部 正常波形得。 正常波形得為、測定時、必 空挿入下。 行際、必要応 接続。 IDENTIFYING VERSION NUMBER確認方法 LOADI

6、NG FACTORY PRESET DATA方法 TEST MODE 8 ME-30 Aug, 1997 Test Item 1. Panel LCD .LED Check 2. SW Check 3. DSP Check 4. Output Frequency Response Check 5. Output Mute Circuit Check 6. OD/DS Circuit Check 7. OD/DS Gain Check 8. Input Frequency Response Check 9. AUX Circuit Check 10. Residual Noise Check a

7、nd Shock Noise Check 11. OD/DS Circuit Noise Check and Shock Noise Check 12. NS , Tuner Check 13. EV Pedal Check Equipment Required . Oscillator ( Audio Generator ) . Oscilloscope . Noise Meter . Opened Plug To Enter the Test Mode While pressing the EFFECT ON/OFF Key , PARAMETER ( L ) Key and PARAME

8、TER ( R ) Key simultaneously , turn the power on. All the LCD are turned on. Do the following operation to select the mode. Press PEDAL 1 to start with 1. Panel LCD LED Check. NOTE : As for the following MODE 2 to MODE 6 , each mode starts after DSP check. Press PEDAL 2 to start with 4. Output Frequ

9、ency Response Check . Press PEDAL 3 to start with 6. DOD/DS Circuit Check . Press PEDAL BANK DOWN to start with 8. Input Frequency Response Check. Press PEDAL BANK UP to start with 10. Residual Noise Check and Shock Noise Check . Press MANUAL Key to start with 13. EV Pedal Check . Mode 6 to start DS

10、P check , when return back to the previous step. Exiting test mode Simply turn off the ME-30. 項目 出力部 特 出力部回路動作 回路動作 動作 入力部特 回路動作 残留、 回路残留、 、動作 動作 用意物 発振器 空 入方 EFFECT ON/OFF Key , PARAMETER (L , R ) Key , 所同時押電源ON、 LCD全点灯。 LCD全点灯状態選択方法次 。 NO_1 PEDAL押、 。 以下、DSP動作確認行、各動作 移。 NO_2 PEDAL押、 出力部 特 。 NO_3 PE

11、DAL押、 ODDS回路動作 。 BANK DOWN PEDAL押、 入力部特 。 BANK UP PEDAL押、 残留 。 MANUAL Key押、 EV動作 。 、前検査戻時、DSP動作 行。 抜方 電源。 9 1. LCD & LED test Press the pedal 1. The LCD starts displaying the test pattern shown in Fig. 1. Verify that the segments are turned on. Press a key and verify that the 7-seg LED and the pedal

12、 LEDs are turned on in the order shown in Fig. 2. 2. Switch test Press a key and the LCD will read SW1. Press the keys in the order shown in Fig. 3 and verify that pressed key is represented on the LCD. The test stops upon detecting a defective key and wont proceed to the next key. Take a corrective

13、 action and return to the step 1. When the test is successful, the test program proceeds to the step 3. DSP test. 3. DSP test The test program automatically starts the test step 3 - 1. after completion of the step 2. 3 - 1. Initialization When the unit is initialized, the program goes to the step 3

14、- .2. Otherwise, it displays ERROR 1 and jumps to the step 4. 3 - 2. Internal RAM test The program writes the test data into and reads out from the internal RAM and then goes to the step 3 - 3. If error, it displays ERROR 2 and jumps to the step 4. 3 - 3. External RAM test The program writes the tes

15、t data into and reads out from the external RAM and then goes to the step 4. If error, it displays ERROR 3 and goes to the step 4. 4. Output frequency response test The LCD displays TEST 1. Sine waves of 20 Hz - 1 kHz - 5 kHz - 15 kHz - 20 Hz from DSP are sent to OUTPUT sockets at 0.8 sec. interval.

16、 Connect a noise meter to OUTPUT R. Set the meter to FLAT and check the readings against the table below. Connect a noise meter to OUTPUT L (with the blank plug in R) and check the readings. The difference in readings between R and L must be within 1 dBm. Monitor OUTPUTs R and L and PHONES R and L i

17、n that order on the oscilloscope and make sure they are look like the waveforms shown in Fig. 4. To go to the step 5, press VALUE + key. NO_1 PEDAL押、 LCD 表示 fig1 LCD 参照。 各正常点灯確認。 Key押、 7SEG , LED 表示 fig2 7SEG LED 及部 LED 参照 、各 LED 正常点灯確認 。 7SEG , LED 表示続 Key 押 、 LCD SW1 表示。 表示番号 fig3 SW 参照従 Key 押、対応

18、LCD 表示変化 確認。 最後SW押、SW正常終了 、自動的次（） 進。 時、不良次 及進事出来。 以下検査自動的処理。 初期化 結果 NG 場合、 LCD ERROR 1 表示、 出力部特進。 結果 OK 、何表示次 進。 内部読込、書込 結果 NG 場合、 LCD ERROR 2 表示、 出力部特進。 結果 OK 、何表示次 進。 外部読込、書込 結果 NG 場合、 LCD ERROR 3 表示、 出力部特進。 結果 OK 、何表示次 進。 出力部特 LCD TEST 1 表示。 0.8 秒間隔、 20Hz , 1KHz , 5KHz , 15KHz 波 出力。 （内部発振、自動） “”切

19、換。 （） , 個別行 下。 , 差 。 確認。 OUTPUT L/R , PHONES L/R 出力 波形、歪確認。 fig4 波形図参照 （） , 個別行 下。 VALUE Key 次検査進。 5. Output stage muting test The LCD displays TEST 2. A 1 kHz sine wave from DSP is sent to OUTPUT sockets at 0.5 sec. interval. In the similar way as in the step 4 above, connect the noise meter or sco

20、pe to OUTPUT R and then L (with the blank plug in R) and check the readings. The difference in readings between R and L must be within 1 dBm. Monitor OUTPUTs R and L and PHONES R and L in that order on the oscilloscope and make sure they are look like the waveforms shown in Fig. 5. To go to the step

21、 6, press VALUE + key. To return back to the step 4, press VALUE - key. 6. OD and DS circuit test The LCD displays TEST 3. A 200 Hz square wave from DSP is sent to OUTPUTs at 0.8 sec. interval at four different levels. Monitor the outputs by first connecting the scope to OUTPUT R and then L (with th

22、e blank plug in R) and make sure that the waveforms look like the ones shown in Fig. 6. To go to the step 7, press VALUE + key. To return back to the step 5, press VALUE - key. 7. OD and DS gain test The LCD displays TEST 4. A 200 Hz sine wave from DSP is sent to OUTPUTs at an 0.8 sec. interval at f

23、our different levels. Monitor the outputs by first connecting the scope to OUTPUT R and then L (with the blank plug in R) and make sure that the waveforms look like the ones shown in Fig. 7. To go to the step 8, press VALUE + key. To return back to the step 6, press VALUE - key. 8. Input frequency r

24、esponse test The LCD displays TEST 5. Apply a square wave of 200 Hz, 200 mV to INPUTs. Monitor the outputs by first connecting the scope to OUTPUT R and then L (with the blank plug in R) and make sure that the waveform looks like the one shown in Fig. 8. To go to the step 9, press VALUE + key. To re

25、turn back to the step 7, press VALUE - key. 9. AUX circuit test The LCD displays TEST 6. Apply a square wave of 200 Hz, 200 mV to AUX INP. The input signal is modified into three waveforms which are sent to OUTPUTs at an 0.5 sec. interval. Monitor the outputs by first connecting the scope to OUTPUT

26、R and then L (with the blank plug in R) and make sure that the waveforms look like the ones shown in Fig. 9. To go to the step 10, press VALUE + key. To return back to the step 8, press VALUE - key. 10. Residual and shock noises The LCD displays TEST 7. Short-circuit the inputs (e.g. insert a short

27、circuit plug into INPUT and AUX IN). Set the noise meter to JIS-A or IHF and connect it first to OUTPUT R and then L (with the blank plug in R) and make sure that the readings are -88.0 dBm or below. Also verify that difference in noise level between channels is 1 dBm or less. 出力部回路動作 LCD TEST 2 表示。

28、 0.5 秒間隔、 1KHz 波間欠出力。 （内部発振、自動） OUTPUT L/R , PHONES L/R 出力波形確認 。 fig5 波形図参照 （） , 個別行 下。 , 差 。 VALUE Key 次検査進。 VALUE Key 前検査戻。 回路動作 LCD TEST 3 表示。 0.8 秒間隔、種類波形出力。 （内部発振 200Hz 矩形波、自動） OUTPUT L/R出力波形確認。 fig6 波形図参照 （） , 個別行 下。 VALUE Key 次検査進。 VALUE Key 前検査戻。 動作 LCD TEST 4 表示。 0.8 秒間隔、種類違波形出力 。 （内部発振 200

29、Hz 波、自動） OUTPUT L/R出力波形確認。 fig7 波形図参照 （） , 個別行 下。 VALUE Key 次検査進。 VALUE Key 前検査戻。 入力部特 LCD TEST 5 表示。 INPUT 200Hz ( 200mVp-p ) 矩形波入力。 OUTPUT L/R出力波形確認。 fig8 波形図参照 （） , 個別行 下。 VALUE Key 次検査進。 VALUE Key 前検査戻。 回路動作 LCD TEST 6 表示。 INPUT , AUX IN 200Hz ( 200mVp-p ) 矩形波入力 。 0.5 秒間隔、種類波形出力。 （自動 ） OUTPUT L/

30、R出力波形確認。 fig9 波形図参照 （） , 個別行 下。 VALUE Key 次検査進。 VALUE Key 前検査戻。 残留、 LCD TEST 7 表示。 “”“” 切換。 INPUT , AUX IN 無接続（入力短絡、信号 GND状態） 、 OUTPUT L/R 出力確認。 OUTPUT L , R -88.0dBm ( JIS-A ) 以下 又、 - 88.0dBm ( IHF ) 以下 Level -20 dBm 1 dBm -20 dBm 1 dBm -20 dBm 1 dBm -20 dBm 1 dBm Frequency 20 Hz 1 kHz 5 kHz 15 kHz

31、 l -20 dBm 1 dBm -20 dBm 1 dBm -20 dBm 1 dBm -20 dBm 1 dBm 周波数 20 Hz 1 kHz 5 kHz 15 kHz Aug, 1997ME-30 10 13 EV pedal test The LCD displays TES*. Swing the volume control foot pedal (EV) and check the values shown on the LCD. For pressing operation, refer to the EV adjustment shown below. If these v

32、alues are not obtained, go to the FV Adjustment below. To return back to the step 12, press VALUE - key. EV adjustment Set VR1 and VR2 at the middle of the travel. 1. Swing up the pedal and adjust VR1 for 002 reading on the LCD. Make sure that the LCD reads 002 just before the pedal is fully swung u

33、p. 2. Depress the pedal to the bottom and add a slightly strong force. Make sure that the LCD reads a value between 220 and 224. If outside the range, adjust VR2. 3. Release the pedal and make sure that the LCD reading is decreasing to 210 or below. 4. Fully swing up the pedal and make sure that the

34、 reading returns to 002. 5. Swing down the pedal until the bottom of the pedal just touches the cushion. Make sure that LCD reads at least 160. 6. Repeat steps 2 and 3 and verify that correct values are displayed. If an error message is displayed in TEST MODE , take the necessary to remove the cause

35、 described below. 動作 LCD TES * 表示。 EV 動表示数値確認。 調整仕様 “動作”正常値 得、以下調整行。 調整 最初 VR1 , VR2 共中央位置有事確認 。 上時 VR1 調整 。 （出来 変付近 VR1 合 ） 一番下強踏込時 以上、 以下事確認。 場合 VR2 動調整。 手（足）離 以下 事確認。 上時状態戻確認 。 踏込、軽当状 態 以上事確認。 再度、状態確認。 不良内 容、主原因説明。 In the similar way, connect a speaker via high gain amplifier to individual OUTPUT

36、s. Apply shocks to the unit and make sure no audible noises are heard. To go to the step 11, press VALUE + key. To return back to the step 9, press VALUE - key. 11. OD and DS circuit residual and shock noises The LCD displays TEST 8. Short-circuit the inputs (e.g. insert a short circuit plug into IN

37、PUT and AUX IN). Set the noise meter to JIS-A or IHF and connect it first to OUTPUT R and then L (with the blank plug in R) and make sure that the readings are -84.0 dBm or below. Also verify that difference in noise level between channels is 1 dBm or less. In the similar way, connect a speaker via

38、a high gain amplifier to individual OUTPUTs. Apply shocks to the unit and make sure no audible noises are heard. To go to the step 12, first connect the OUTPUT L to the INPUT socket and then press VALUE + key (see note in step 12). To return back to the step 10, press VALUE - key. 12. NS and tuner t

39、est Note: ERROR * will appear if VALUE - key has been pressed without connecting OUTPUT L to the INPUT socket. The LCD displays TEST 9. 12 - 1. NS bias test The program checks the NS bias and, if correct, goes to the step 12.2. Otherwise, the program stops, displaying ERROR 4. Adjust the bias and re

40、start the test program from step 1. 12 - 2. NS input test When the input is as designed, the program displays the tuner status. See Fig. 10. Press TUNER key. If the input is incorrect, the program displays stops here, displaying ERROR 5 or ERROR 6. Isolate the cause and restart the test program from

41、 step 1. To go to the step 13, press VALUE + key. To return back to the step 11, press VALUE - key. （） , 個別行 下。 , 差 。 外、 , 接続、聴 。 本体衝撃与、無確認 。 （） , 個別行 下。 VALUE Key 次検査進。 VALUE Key 前検査戻。 回路残留、 “”“” 切換。 INPUT , AUX IN 無接続、 （入力短絡、信号 GND状態） 、 OUTPUT L/R 出力確認。 OUTPUT L , R -34.0dBm ( JIS-A ) 以下 又、 - 34.0

42、dBm (IHF ) 以下 （） , 個別行 下。 , 差 。 外、 , 接続、聴 。 本体衝撃与、無確認 。 （） , 個別行 下。 VALUE Key 次検査進。 VALUE Key 前検査戻。 、動作 注意： OUTPUT_L INPUT 接続、 VALUE Key 押下。 上記接続 VALUE Key 押場合、 ERROR * 表示。 LCD TEST 9 表示。 結果 NG ERROR 4 表示、次 進事出来。 結果 OK 、何表示次 進。 結果 NG ERROR 5 ERROR 6 表 示、次進事出来。 結果 OK 表示状態。 fig10 参照 TUNER Key 表示状態抜。 V

43、ALUE Key 次検査進。 VALUE Key 前検査戻。 LCD reading 220-224 210 min 002 max 150 min Travel of EV pedal Deep press Press and release Swing up Down position LCD 表示数値 220以上224以下 210以下 002以下 150以上 EV 強踏込 強踏込力抜 一番上 軽踏込 ERROR MESSAGES内容 Description DSP cannot be accessed DSP IRAM defective DSP ERAM defective NS Ci

44、rcuit defective NS Circuit defective NS Circuit defective Solder bridge or improper soldering at portion anywhere between CPU (IC305) and DSP (IC306). CPU (IC305) and/or DSP (IC306) defective. Solder bridge or improper soldering at portion anywhere between CPU (IC305) and DSP (IC306). CPU (IC305) an

45、d/or DSP (IC306) defective. Solder bridge or improper soldering at portion anywhere between CPU (IC305) and DSP (IC306). CPU (IC305) and/or DSP (IC306) defective. CPU (IC305) 29 , 30 pin around circuit and/or BIAS OPAMP (IC7) around circuit defective. CPU (IC305) 29 , 30 pin around circuit and/or EN

46、VELOP OPAMP (IC7) around circuit defective. CPU (IC305) 29 , 30 pin around circuit and/or ENVELOP OPAMP (IC7) around circuit defective. Possible cause Error Message ERROR 1 ERROR 2 ERROR 3 ERROR 4 ERROR 5 ERROR 6 不良内容 DSP 出来。 DSP IRAM 。 DSP ERAM 。 NS 回路 NG。 NS 回路 NG。 NS 回路 NG。 CPU ( IC305 ) - DSP (

47、IC306 )間半田、 半田付不良。 CPU ( IC305 ) DSP ( IC306 ) 不良。 CPU ( IC305 ) - DSP ( IC306 )間半田、 半田付不良。 CPU ( IC305 ) DSP ( IC306 ) 不良。 CPU ( IC305 ) - DSP ( IC306 )間半田、 半田付不良。 CPU ( IC305 ) DSP ( IC306 ) 不良。 CPU ( IC305 ) 29 , 30pin 周辺回路 ( BAIAS ) OPAMP ( IC7 ) 周辺回路不良。 CPU ( IC305 ) 29 , 30pin 周辺回路 ( ENVELOP )

48、 OPAMP ( IC7 ) 周辺回路不良。 CPU ( IC305 ) 29 , 30pin 周辺回路 ( ENVELOP ) OPAMP ( IC7 ) 周辺回路不良。 主原因 ERROR 1 ERROR 2 ERROR 3 ERROR 4 ERROR 5 ERROR 6 ME-30 Aug, 1997 11 q w e r t y u i o Fig.1. LCD TESTLCD CSRV 1REC OD/DS 2 DLY 3 MOD EDIT/ESC ON/OFF WRITE/COPY ON/ OFF REC BYPASS TUNER MANUAL PEDAL GUITAR AMP S

49、IMULATOR PHRASE TRAINER 9 10 1112 13 1 2 3 4 5 6 7 8 Fig.2. 7SEG. & PEDAL LED TEST7SEG. LED及LED CSRV 1REC OD/DS 2 DLY 3 MOD EDIT/ESC ON/OFF WRITE/COPY ON/ OFF REC BYPASS TUNER MANUAL PEDAL GUITAR AMP SIMULATOR PHRASE TRAINER SW1SW2 SW3SW4 SW6SW5SW7 SW8 SW9 SW10SW11 SW12 SW13SW14 SW15SW16 SW17 SW18SW19 SW20 SW21SW22 SW24 SW25 SW23 Fig.3. SW CHECK TESTSW Fig.4 TEST 1WAVE波形図 ME-30