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ME-33

May. 2001

10

9. Check of AUX circuit operation.

"TEST 5" will appear on the LCD screen.

Enter a 200 Hz (200 mVp-p) rectangular wave in AUX IN (both

L and R).

Three different waveforms are output at 0.5-second intervals

(Automatic loop).

Check the output waveform of OUTPUT L/R using an

oscilloscope.

Check Lch (MONO) and Rch on individually.

Return to the previous check using the [EFFECT L] button.

Go to the next check using the [EFFECT R] button.

10. Residual noise check

"TEST 6" will appear on the LCD screen.

Switch the noise meter to 'JIS-A' or 'IHF' mode.

Check the output of OUTPUT L/R without connecting INPUT

and AUX IN (short circuited input, the state of short-circuited

signal and GND lines) using a noise meter.

OUTPUT L and R at or below -84.0 dBu (JIS-A) or at or below-

84.0 dBu (IHF)

Check Lch (MONO) and Rch on individually.

Set the level difference between Lch and Rch to +1 dBu or -1

dBu.

Return to the previous check using the [EFFECT L] button.

Go to the next check using the [EFFECT R] button.

11. High gain residual noise and shock noise check

"TEST 7" will appear on the LCD screen.

Check the output of OUTPUT L/R using a noise meter.

OUTPUT L and R at or below -39.0 dBu (JIS-A) or at or below

-39.0 dBu (IHF).

Remove the noise meter, connect a high gain amplifier to

OUTPUT L and R, and check for abnormal noise through a

speaker.

Apply shock to the main unit and check for shock noise.

Check Lch (MONO) and Rch on individually.

Return to the previous check using the [EFFECT L] button.

Go to the next check using the [EFFECT R] button.

9. AUX 回路動作チェック

LCD に "TEST 5" と表示されます。

AUX IN(L, R 片方ずつ)に 200 Hz (200 mVp-p) 矩形波を

入力します。

0.5 秒間隔で、3 種類の波形が出力されます。(自動ルー

プ)

オシロスコープで OUTPUT L/R  の出力波形を確認しま

す。

Lch (MONO), Rch を個別にチェックを行って下さい。

[EFFECT L] キーで前の検査に戻ります。

[EFFECT R] キーで次の検査に進みます。

10. 残留ノイズチェック

LCD に "TEST 6" と表示されます。

ノイズメーターを 'JIS-A' または 'IHF' のモードに切り換え

ます。

INPUT,  AUX  IN は無接続で(入力短絡、信号ラインと

GND ラインがショートされた状態)、OUTPUT L/R の出

力をノイズメーターで確認して下さい。

OUTPUT L, R -84.0 dBu (JIS-A) 以下 又は、-84.0 dBu (IHF)

以下

Lch (MONO), Rch を個別にチェックを行って下さい。

Lch, Rch のレベル差は '+1 dBu or -1 dBu' とします。

 [EFFECT L] キーで前の検査に戻ります。

 [EFFECT R] キーで次の検査に進みます。

11. 高ゲイン残留ノイズ、ショック・ノイズチェック

LCD に "TEST 7" と表示されます。

OUTPUT L/Rの出力をノイズメーターで確認して下さい。

OUTPUT  L/R  -39.0  dBu(JIS-A)以下、叉は-39.0  dBu

(IHF)以下。

ノイズメーターを外し、ハイゲインのアンプを OUTPUT

L, R に接続し、スピーカーで聴いて異音がないかどうか、

確認して下さい。

また 本体に衝撃を与え、ショック・ノイズが無いか確認

して下さい。

Lch (MONO), Rch を個別にチェックを行って下さい。

[EFFECT L] キーで前の検査に戻ります。

[EFFECT R] キーで次の検査に進みます。

Summary of Contents for ME-33

Page 1: ...Multiple Effects AD Conversion AF Method DA Conversion Method 24 bit DAC Sampling Frequency 44 1 kHz Patches 60 User 30 Preset Effects Guitar Simulator Compressor Overdrive Distortion Auto Wah T Wah P...

Page 2: ...ght 1 8 kg 4 lbs including batteries Accessories Owner s Manual SE000160 Dry Batteries Alkaline LR6 AA type x6 Roland Service information Sheet Options AC Adaptor PSA series 0 dBu 0 775 Vrms In the in...

Page 3: ...RV110T 40E1 125A B54 U00056458100 6 17048630 VR ACCESSORY NUT M9 6 17048631 VR ACCESSORY WASHER M9 6 4 SE000171 RUBBER SWITCH U00056335400 1 5 SE000172 TACT SWITCH SKQKAKD010 U00053696200 5 22180605...

Page 4: ...U00056343300 5 22 SE000204 BATTERY TERMINAL U00056344400 2 23 SE000205 BATTERY TERMINAL U00056345500 1 24 SE000089 BATTERY TERMINAL C MA34002570 1 25 22170103 SUPPORT SPRING FOR SWITCH PEDAL 5 28 SE00...

Page 5: ...223C080AF 101 IC DSP IC15 on MB 1 02451434 AK4552VT IC AD DA IC7 on MB 1 SE000176 IC EEPROM CAT24WC32J U00051867000 IC16 on MB 1 SE000177 IC DRAM GM71VS18163CLT 6 U00056450200 IC18 on MB 1 02453056 BU...

Page 6: ...60712 CORD HOOK 236 712 1 22350313 FOOT MKS 235 313 5 SE000208 KAKUSAN SHEET U00056350100 1 SE000203 LCD CONNECTOR U00056338700 2 22170103 SUPPORT SPRING FOR SWITCH PEDAL 5 SE000127 VR PEDAL REFLECT S...

Page 7: ...ill start If there is no problem the LCD will light up fully How to select a mode under fully lit conditions is as shown below Mode 1 When the No 1 foot switch is depressed the mode will start from 2...

Page 8: ...wrong during this process you cannot go to the next SW VR check or step 4 DSP check The following check will be made automatically 4 1 Initialization test When the result is NG ERROR 1 will appear on...

Page 9: ...eturn to the previous check using the EFFECT L button Go to the next check using the EFFECT R button 7 Special check of input section frequency response TEST 3 will appear on the LCD screen Enter a 20...

Page 10: ...difference between Lch and Rch to 1 dBu or 1 dBu Return to the previous check using the EFFECT L button Go to the next check using the EFFECT R button 11 High gain residual noise and shock noise chec...

Page 11: ...completed Checking Operation Turn on the power to put the machine into normal operation Connect a tuner such as a TU 12 and a monitoring speaker to OUTPUT Connect an oscillator to INPUT and input the...

Page 12: ...MP PLEXER MONO STEREO AD DA IC7 LPF DE ENPH IC9 IC8 OUTPUT STEREO AMP PHONES MUTE DSP DRAM EEPROM H8 3847R IC14 ESP4 IC15 IC17 18 IC16 BUS CPU PHOTO INTERRUPTOR AMP VR x 6 SWITCH LCD LED DRIVER IC11 7...

Page 13: ...ME 33 May 2001 13 CIRCUIT BOARD MAIN BOARD 1 2 A B C D E F G H I J K L M N O P Q R S T U V MAIN BOARD...

Page 14: ...ME 33 May 2001 14 A B C D E F G H I J K L M N O P Q R S T U V CIRCUIT BOARD MAIN BOARD 2 2 MAIN BOARD...

Page 15: ...47 R170 47 IC18 GM71VS18163CLT 6 VCC 1 DQ0 2 DQ1 3 DQ2 4 DQ3 5 VCC 6 DQ4 7 DQ5 8 DQ6 9 DQ7 10 NC 11 NC 20 NC 15 WE 17 RAS 18 NC 16 NC 19 A0 21 A1 22 A2 23 A3 24 VCC 25 VSS 26 A4 27 A5 28 A6 29 A7 30...

Page 16: ...R24 47K IC9A M5219FP 2 3 1 C38 22 16 C39 22 16 IC6 S 8520E33MC BJS ON OFF 1 VSS 2 VOUT 3 EXT 4 VIN 5 C40 100 16 C41 0 1 C42 220 16 C43 0 1 L8 4 7uH L9 47uH C33 0 1 C72 150P R53 330 R60 100K_1 R61 43K_...

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