background image

 

9

DR-3

 

fig.volume

 

3.

 

Use an oscilloscope to observe the waveforms from OUTPUT L/R (PIN 
jack) on the DR-3.

 

fig.lineout-1

 

• Waveforms like those shown above must be output from LINE OUT L/

R.

• They must be rectangular waves phase-shifted by 90 degrees.

• The waveform height must be from 1.8 V to 2.4 V.

4.

Observe the waveform from the tip of R (MONO) on the DR-3.

Nothing must be plugged into L (PHONE) at this time.

fig.lineout-2

• A stepped waveform like the one shown above must be output from R 

(MONO).

5.

Observe the waveforms from the tip of L (PHONE) and from the tip of R 
(MONO) on the DR-3.

fig.lineout-3

• They must be rectangular waves phase-shifted by 90 degrees, like those 

shown above.

• The waveform height must be from 1.8 V to 2.4 V.

6.

Disconnect the plug from R (MONO).

Insert a stereo plug into L (PHONE) and waveforms of the tip and the 
ring.

fig.lineout-4

7.

Turn [VOLUME] on the DR-3 to “MAX,” then to “MIN,” then back to 
“MAX,” and make sure the waveforms change smoothly.

Also, make sure that the waveforms disappear completely when 
[VOLUME] is set to “MIN.”

fig.volume

8.

Press the [EXIT] button to end the SQUARE Check.

13.SINE Check

This item is used only during the shipping test at the factory.

You need not use it when servicing in the field.

14.MUTE Check

This item is used only during the shipping test at the factory.

You need not use it when servicing in the field.

15.Ending the Test Mode

Switch off the DR-3.

16.Checks for Normal Operation

1.

Switch on the DR-3 unit.

2.

Connect headphones to L (PHONES) on the DR-3.

fig.phone

Lch

1V/DIV

0.2s/DIV

LINE OUT

Rch

VOLTS 1V/DIV, TIMES 0.2S/DIV

Lch

1V/DIV

0.2s/DIV

L(PHONE) / R(MONO)

Rch

VOLTS 1V/DIV, TIMES 0.2S/DIV

Lch

1V/DIV

0.2s/DIV

L(PHONE) / R(MONO)

Rch

VOLTS 1V/DIV, TIMES 0.2S/DIV

RING

1V/DIV

0.2s/DIV

L(PHONE) TIP / RING

TIP

VOLTS 1V/DIV, TIMES 0.2S/DIV

Headphone

Summary of Contents for Dr. Rhythm DR-3

Page 1: ...SC 17058151E0 Feb 2003 DR 3 SERVICE NOTES Issued by RJA TABLE OF CONTENTS SPECIFICATIONS 2 LOCATION OF CONTROLS 3 LOCATION OF CONTROLS PARTS LIST 3 EXPLODED VIEW 4 EXPLODED VIEW PARTS LIST 4 PARTS LI...

Page 2: ...4 inch phone type Foot Switch Jack Stereo 1 4 inch phone type MIDI IN Connector DC IN AC Adaptor Jack Power Supply DC 9V Dry Battery x 6 AC Adapter PSA series Power Consumption 200 mA Expected batter...

Page 3: ...F15 24B 1 3 03237812 RUBBER SW FOR DR 3 1 4 01566445 DIN CONNECTER YKF51 5067 take off the shield plate 1 5 02897334 6 5M JACK HTJ 064 10D 1 6 00569278 6 5M JACK LGR4609 7100 2 7 00451434 RCA PIN JACK...

Page 4: ...1 2 9 No Part Code Part Name Q ty 1 F2477101 DR KNOB 1 2 03237812 RUBBER SW 1 3 G2027602 BATTERY COVER 1 4 G2017617 BATTERY CASE 1 5 G2177304 BATTERY TERMINAL 2 6 G2177306 BATTERY TERMINAL 1 7 G217730...

Page 5: ...ACK EXT TERMINAL 02897334 HTJ 064 10D 6 5M JACK JK2 1 00569278 LGR4609 7100 6 5M JACK JK4 JK5 2 00451434 YKC21 3120 RCA PIN JACK JK3 2 13449711 HEC0470 01 630 DC JACK JK6 1 01566445 YKF51 5067 DIN CON...

Page 6: ...IHF A DR 3 VOLUME setting MAX Test items 1 SRAM Check 2 FLASH Check 3 GA Check 4 MR3 Check 5 BATTERY Check 6 MIDI Check 7 LED Check 8 LCD Check 9 Encorder Check 10 FOOT SW Check 11 PIEZO Check 12 SQU...

Page 7: ...nd note number 3 Press the EXIT button to end the MIDI Check 7 LED Check fig test7 1 1 Press the ENTER button 2 Check the following The LEDs for all buttons must light up 22 locations The brightness o...

Page 8: ...t the foot switches fig test10 1 1 Press the ENTER button fig test10 2 2 Press and release the FS 5U to which the white line of the PCS 31 is connected fig test10 3 3 Press and release the FS 5U to wh...

Page 9: ...and waveforms of the tip and the ring fig lineout 4 7 Turn VOLUME on the DR 3 to MAX then to MIN then back to MAX and make sure the waveforms change smoothly Also make sure that the waveforms disappe...

Page 10: ...in the DR 3 fig battery 3 Switch on the DR 3 unit 4 Make sure the product starts and the LEDs are as follows MANU PTN SOUND SHAPE and AMBIENCE LEDs lighted INTRO START LED flashing 5 Switch off the DR...

Page 11: ...TEM SOFTWARE UPDATE PROCEDURE Required equipment 1 Update CD ROM P No 17041302 2 AC Adaptor PSA Series 3 Sequencer Capable of playing back SMF 4 MIDI cable Update Method User created data cannot be ba...

Page 12: ...y of the piezo element to affix it securely After affixing the piezo element make sure that it is not loose at any point When pressing down on the piezo element do not touch the metal portion of the p...

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