Roland SP-404SX Operating and maintenance manual

SERVICE NOTES
Issued by RJA
Copyright © 2010 Roland Corporation
All rights reserved. No part of this publication may be reproduced in any form without the written permission
of Roland Corporation.
CC-KWS17058637E0
Sep. 2009 SP-404SX
Table of Contents
Cautionary Notes ..............................................................2
Specifications .....................................................................3
Location of Controls .........................................................4
Exploded View ..................................................................6
Exploded View Parts List.................................................7
Plain View ..........................................................................8
Plain View Parts List.........................................................9
Parts List ...........................................................................10
Verifying the Version Numbers....................................12
Formatting an SD Card ..................................................12
Data Backup and Restore Operations ..........................12
Performing a Factory Reset............................................14
Updating the System ......................................................15
Test Mode .........................................................................16
Block Diagram/Wiring Diagram..................................20
Circuit Board (Panel Board, Jack Board)......................22
Circuit Diagram (Panel Board)......................................24
Circuit Diagram (Jack Board) ........................................26
Revise Information
Jun. 30, 2010 p. 15, p. 17 Corrected an error.
Feb. 28, 2013 p. 17 Corrected errors.
Dec. 10, 2015 p. 15, p. 18 Added descriptions.
Apr. 12, 2017 p. 2 Deleted the circuit diagrams for Main Board.

2
Sep. 2009 SP-404SX
Cautionary Notes
Before beginning the procedure, please read
through this document. The matters described may
differ according to the model.
Back Up User Data!
User data may be lost during the course of the procedure. Refer to “Data
Backup and Restore Operations” (p. 12) in the Service Notes and save the
data. After completing the procedure, restore the backed-up data to the
product.
Part Replacement
When replacing components near the power-supply circuit or a heat-
generating circuit (such as a circuit provided with a heat sink or including a
cement resistor), carry out the procedure according to the instructions with
respect to the part number, direction, and attachment position (mounting so as
to leave an air gap between the component and the circuit board, etc.).
Parts List
A component whose part code is ******** will not be supplied as a service part
because one of the following reasons applies.
• Because it is supplied as an assembled part (under a different part code).
• Because a number of circuit boards are grouped together and supplied as
a single circuit board (under a different part code).
• Because supply is prohibited due to copyright restrictions.
• Because reissuance is restricted.
• Because the part is made to order (at current market price).
• Because it is carried in electronic data on the Roland web site.
• Because it is a package or an accessory irrelevant to the function
maintenance of the main body.
• Because it can be replaced with an article on the market. (battery or etc.)
Circuit Diagram
In the circuit diagram, “NIU” is an abbreviation for “Not in Use,” and
“UnPop” is an abbreviation for “Unpopulated.” They both mean non-mounted
components. The circuit board and circuit board diagram show silk-screened
indications, but no components are mounted.
There are cases that the circuit diagrams are omitted. This omission will
happen to the highly integrated digital circuit boards (e.g. Main Board etc) that
are virtually impossible to repair nor analyze.

3
Sep. 2009 SP-404SX
Specifications
SP-404SX: Sampler
Maximum Polyphony
12 voices
Recordable Data
Samples: 120 (12 samples x 10 banks) (stored on SD card)
Patterns: 120 (12 patterns x 10 banks) (stored on SD card)
Sampling Time
(Total Time for All Samples)
The maximum sampling time (size) for a single sample is approximately 180
minutes in stereo (2 GB).
The following table shows the approximate total sampling time of the samples
that can be stored on one SD card.
* Since the 1 GB SD card included with the SP-404SX contains preload data, the
available sampling time will be less than the time above.
Data Format
16-bit Linear (.wav/aiff)
Sampling Frequency
44.1 kHz
Pattern Sequencer
Maximum recordable notes: Approx. 16,000 notes
Resolution: 96 ticks per quarter note
Pattern Length: 1–99 measures
Recording method: Realtime Loop Recording (with shuffle quantize function)
Effects
29 types
Pads
12 + SubPad x 1
Controllers
Control Knob x 3
Display
7 segments, 3 characters (LED)
Onboard Mic
Mono x 1
Connectors
LINE IN jacks (L, R) (RCA phono type)
LINE OUT jacks (L, R) (RCA phono type)
Headphones (PHONES) jack (Stereo 1/4 inch phone type)
MIC IN jack (1/4 inch phone type)
MIDI IN connector
DC IN jack
SD card slot
Power Supply
DC 9 V
(Ni-MH AA SIZE Rechargeable Battery x 6,
Alkaline AA SIZE Dry Battery x 6 or AC Adaptor)
* Batteries sold separately
Battery Life for Continuous Use
Ni-MH Rechargeable batteries: approximately 5 hours
Alkaline dry batteries: approximately 4 hours
* These figures will vary depending on the actual conditions of use.
Current Draw
450 mA
Dimensions
177.6 (W) x 256.7 (D) x 72.1 (H) mm
7 (W) x 10-1/8 (D) x 2-7/8 (H) inches
Weight
1.2 kg / 2 lbs 11 oz (excluding batteries)
Accessories
SD card (1GB) (#********)
SP-404SX UTILITY CD-ROM (#5100008941)
AC Adaptor PSB-1U (#04236101)
AC Cord (#5100012293, #02562456, #01903356, #03785590)
Owner’s Manual (#5100008948)
* Printed matters will not be supplied after the end of the production. Then,
download the electronic file from the Roland web site.
* In the interest of product improvement, the specifications and/or appearance of
this unit are subject to change without prior notice.
Card
capacity Stereo (mono) Card capacity Stereo (mono)
1 GB Approx. 90 min.
(180 min.) 8 GB Approx. 720 min. (24 hours)
2 GB Approx. 180 min.
(360 min.) 16GB Approx. 24 hours (48 hours)
4 GB Approx. 360 min.
(720 min.) 32 GB Approx. 48 hours (96 hours)

4
Sep. 2009 SP-404SX
Location of Controls
fig.PANEL.eps
1 1
10
898
67 5
2 3
4
No. Part Code Part Name Description Q’ty
1 03565234 J R-KNOB SF-ELA BLK/SLV 4
2 04011745 ROTARY POTENTIOMETER RK09K12C0A8H 1
3 03679256 ROTARY POTENTIOMETER RK09D1130C5B 3
4 01899801 RCA(PIN) JACK YKC21-3834N 2
5 01566445 DIN CONNECTOR YKF51-5067 1
6 02671312 SLIDE SWITCH SLG-22-465 1
7 13449711 AC ADAPTOR JACK HEC0470-01-630 1
8 13449275 6.5MM JACK YKB21-5074 2
9 13279884 POTENTIOMETER RK09K1110A0J 10KB 1
10 03679190 MIC WM-64PNT 1

5
Sep. 2009 SP-404SX

6
Sep. 2009 SP-404SX
Exploded View
fig.bunkai.eps
Top
Bottom
View 1
View 2
1
2
3
4
8
9
6
7
16
10
11
12
13
19
17 18
14
15
20
20
21
5

7
Sep. 2009 SP-404SX
Exploded View Parts List
* When ordering No. 13, order No. 21 as well.
No. Part Code Part Name Description Q’ty
1 5100006876 TOP PANEL 1
2 03565234 J R-KNOB SF-ELA BLK/SLV 4
3 5100006870 TOP CASE 1
4 5100006873 SD COVER 1
5 04679101 DISPLAY COVER 1
6 5100008495 RUBBER SW EFFECT 1
5100007188 PANEL SHEET ASSY 1
* This unit includes the following parts.
7******** PANEL BOARD 1
15 ******** JACK BOARD 1
8 5100006879 RUBBER SW PAD 1
9 03908978 PWB HOLDER MAIN 1
10 5100007184 MAIN BOARD ASSY 1
11 5100009219 SHIELD PLATE 1
12 03908945 BOTTOM CASE 1
13 03908901 BATTERY COVER 1
14 5100006877 REAR PANEL 1
16 5100006883 BATTERY TERMINAL - 1
17 5100006884 BATTERY TERMINAL +- 1
18 03908912 BATTERY TERMINAL + 1
19 5100006885 BATTERY TERMINAL PM 1
20 00340690 FOOT ZULEN (CUSHION) XCK040 12MM 4
21 40672389 BATTERY CUSHION 2

8
Sep. 2009 SP-404SX
Plain View
fig.bunkai-H.eps
Top View 1
Bottom View 2
c
b
c
a
a
dbe
b

9
Sep. 2009 SP-404SX
Plain View Parts List
No. Part Code Part Name Description Q’ty
a 02126156 SCREW M3X10 HEX SOCKET HEAD CAP TAPTITE P 4
b 40011312 SCREW 3X8 BINDING TAPTITE P BZC 12
c 40011112 SCREW 3X10 BINDING TAPTITE B BZC 6
d 40011490 SCREW M3X6 PAN MACHINE W/SW BZC 1
e 40230590 SCREW M3X10 BINDING MACHINE NI 1

10
Sep. 2009 SP-404SX
Parts List
fig.-part1-e.eps
Due to one or more of the following reasons,
parts with parts code ******** cannot be supplied as service parts.
• Part supplied only as a component in a complete assembly
• Copyright does not permit the part to be supplied
• Part is sold commercially
Note: The parts marked # are new. (initial parts) The description “Q’ty” means a necessary number of the parts per one product.
Safety Precautions:
The parts marked have
safety-related characteristics. Use
only listed parts for replacement.
CASING
# 5100006870 TOP CASE 1
# 5100006876 TOP PANEL 1
# 5100006877 REAR PANEL 1
03908945 BOTTOM CASE 1
04679101 DISPLAY COVER 1
# 5100006873 SD COVER 1
03908901 BATTERY COVER 1
CHASSIS
03908978 PWB HOLDER MAIN 1
# 5100009219 SHIELD PLATE 1
KNOB, BUTTON
03565234 J R-KNOB SF-ELA BLK/SLV 4
# 5100008495 RUBBER SW EFFECT 1
# 5100006879 RUBBER SW PAD 1
SWITCH
02671312 SLIDE SWITCH SLG-22-465 1
JACK, EXT TERMINAL
01566445 DIN CONNECTOR YKF51-5067 1
01899801 RCA (PIN) JACK YKC21-3834N 2
13449275 6.5MM JACK YKB21-5074 2
13449711 AC ADAPTOR JACK HEC0470-01-630 1
PWB ASSY
# 5100007184 MAIN BOARD ASSY 1
# 5100007188 PANEL SHEET ASSY 1
* This unit includes the following parts.
#******** PANEL BOARD 1
#******** JACK BOARD 1
DIODE
01904112 LED (RED) SLR-342VCT32 N.P.Q RANK 1
04676401 LED BA56-11EWA 1
POTENTIOMETER
03679256 ROTARY POTENTIOMETER RK09D1130C5B 3
13279884 POTENTIOMETER RK09K1110A0J 10KB 1
04011745 ROTARY POTENTIOMETER RK09K12C0A8H 1
WIRING, CABLE
# 5100009117 WIRING W1 1
02343223 WIRING 6X100-P2.0-PHR-PHR-F 1
02344012 WIRING 12X150-P2.0-PHR-PHR-F 1
# 5100008919 BAN CARD 20624 FWR-P=1.00-K1-18-100 1
# 5100008922 BAN CARD 20624 FWR-P=1.00-K1-22-100 1
SCREWS
40011490 SCREW M3X6 PAN MACHINE W/SW BZC 1
40230590 SCREW M3X10 BINDING MACHINE NI 1
02126156 SCREW M3X10 HEX SOCKET HEAD CAP TAPTITE P 4
40011312 SCREW 3X8 BINDING TAPTITE P FE BZC 12
40011112 SCREW 3X10 BINDING TAPTITE B BZC 2

11
Sep. 2009 SP-404SX
MISCELLANEOUS
03679190 MIC WM-64PNT 1
03908912 BATTERY TERMINAL + 1
# 5100006883 BATTERY TERMINAL - 1
# 5100006884 BATTERY TERMINAL +- 1
# 5100006885 BATTERY TERMINAL PM 1
40672389 BATTERY CUSHION 2
00340690 FOOT ZULEN (CUSHION) XCK040 12MM 4
04010601 LED SPACER LH-3-12 1
12199584 GROUNDING TERMINAL M1698 2
ACCESSORIES (Standard)
# 5100008948 OWNER’S MANUAL ENGLISH 1
# 5100008944 OWNER’S MANUAL JAPANESE 1
# 5100008941 CD-ROM ENGLISH/JAPANESE V1.00 1
04236101 AC ADAPTOR WITHOUT AC CORD PSB-1U(S) UNIVERSAL 1
01903334 AC CORD SET PSE 100V 1.0M FOR PSB-1U 1
5100012293 AC CORD SET 117VBL 1.0M FOR PSB 1
02562456 AC CORD SET 120V 1.0M (NON POLAR) 1
01903356 AC CORD SET 230V 1.0M FOR PSB 1
03785590 AC CORD SET SC-078-NA05 240VA 1
00905234 EURO CONVERTER PLUG ECP01-5A 1

12
Sep. 2009 SP-404SX
Verifying the Version
Numbers
Refer to 1. VERSION under Test Mode (p. 16).
Formatting an SD Card
To enable a commercially available SD card to be used on the SP-404SX, it
must be formatted on the unit.
Item Required
• SD card you want to format
The SD card included with the product (the customer-owned SD card that is in
your care) contains the customer’s setting data, and formatting the SD card
erases all such data. If necessary, make a backup of the data beforehand. (Refer
to Data Backup and Restore Operations (p. 12).)
Procedure
1. Insert the SD card you want to format into the SP-404SX.
2. Hold down the [CANCEL] button and press the [REMAIN] button.
The [BANK] buttons flash and the message FNt appears on the 7-
segment LED display.
3. Press any one of the [BANK] buttons.
The [BANK] buttons stop flashing and stay lighted, and the [DEL] button
flashes.
* To cancel formatting, press the [CANCEL] button.
4. Press the [DEL] button.
* The [DEL] button lights up and formatting is executed.
While formatting is in progress, a dot on the 7-segment LED display
flashes.
When the flashing stops, formatting has finished.
* Be very sure never to switch off the power while the dot is flashing. Doing so
may damage the SD card and make it unusable.
* Never modify or delete and files or folders created when the SD card was
formatted. Doing so may cause the SP-404SX to fail to recognize the SD card.
Data Backup and Restore
Operations
User data and setting values on the SP-404SX are saved at one or more of the
following destinations, depending on the data type. Backup and restore
operations for each of these must be performed as required.
•SDcard
• Main board
• Both SD card and main board
Parameter Saved Only on the Main Board
The parameter shown below is saved only on the Main Board. When servicing
or replacing the Main Board, note down the value of this setting on paper, and
restore the noted value to the unit after servicing.
* For information on the meaning of the setting value, refer to the owner’s manual.
Parameters Saved on Both the SD Card
and the Main Board
The five types of parameters shown below are saved both on the SD card and
on the Main Board.
If the customer has used the unit with the SD card installed in it, the same
values for the respective parameters are saved on the SD card and on the Main
Board, but if the unit has been used with no SD card installed, the values saved
on the SD card and on the Main Board might differ.
In such cases, in addition to backing up the SD card (as described earlier), also
note down on paper the setting values that are saved on the Main Board, and
restore the written-down values after servicing or replacing the Main Board.
* For information on the meanings of the setting values, refer to the owner’s
manual.
* If an SD card is installed, the setting values on the SD card take precedence.
Changing and applying any one of the setting values described above while an
SD card is inserted causes all settings on the Main Board at that time to be
overwritten with the same values as the settings on the SD card. That is, all
setting values are made to match.
Parameter Setting value
Page where covered in
the owner’s manual
Type of battery used AL, ni P. 6
Parameter Setting value Page where covered in
the owner’s manual
ILLUMINATION off, r b, b, r, SLP p. 40
EFFECT LIMIT L.on, L.of p. 42
MIDI SYNC Aut, tnP, off p. 47
INPUT GAIN 0 dB, -10 dB p. 39
OUTPUT GAIN -3 dB, 0 dB, 3 dB,
6 dB, 9 dB, 12 dB p. 39

13
Sep. 2009 SP-404SX
Backing Up, Restoring, and
Copying Values on a Customer
SD Card
If you have received from the customer the included SD card together with the
unit and are making use of the card to carry out testing, back up the values
saved on the SD card to a computer, then restore the backed-up values as
required. You can also use a different SD card to create a copy.
Items Required
• Computer (running Windows XP)
• SD card reader/writer
• SD card received from the customer
When making a copy, the following is also required
• SD card (blank) of larger capacity than the customer’s SD card
Procedure
Backing Up a Customer SD Card onto a Computer
1. Insert the customer SD card into the SD card reader/writer connected to
the computer.
2. Copy all files and folders on the SD card in their entirety to the
computer’s hard drive.
Restoring or Copying Data on the SD Card
3. On the SP-404SX, format the SD card to be returned to the customer. (If
you’re making a copy, use a blank SD card.)
4. Insert the formatted SD card into the SD card reader/writer connected to
the computer.
5. Copy the data saved in step 2in its entirety to the root directory of the SD
card.
Backing Up/Restoring Settings
Saved on the Main Board
Making a Written Record of Settings Saved
on the Main Board (Backup)
The method used to make a written record of the parameter settings saved on
the Main Board is described below.
1. Eject the SD card.
2. Hold down [FUNC] and turn on the power switch on the rear panel, and
write down the type of battery displayed.
3. Switch the power off, then back on again.
4. Hold down [FUNC] and press [7], then write down the value displayed
for the ILLUMINATION setting.
5. Hold down [FUNC] and press [8], then write down the value displayed
for the EFFECT LIMIT setting.
6. Hold down [FUNC] and press [10], then write down the value displayed
for the MIDI SYNC setting.
7. Hold down [FUNC] and press [11], then write down the value displayed
for the INPUT GAIN setting.
8. Hold down [FUNC] and press [12], then write down the value displayed
for the OUTPUT GAIN setting.
9. Switch off the power.
Returning Settings to the Main Board
(Restore)
This describes the procedure for restoring setting values written down in the
previous section.
1. Eject the SD card.
2. Hold down [FUNC] and turn on the power switch on the rear panel.
3. Turn the [CTRL 3] control to set the battery type.
4. Switch the power off, then back on again.
5. Hold down [FUNC] and press [7].
6. Turn the [CTRL 3] control to set the ILLUMINATION value.
7. Hold down [FUNC] and press [8].
8. Turn the [CTRL 3] control to set the EFFECT LIMIT value.
9. Hold down [FUNC] and press [10].
10. Turn the [CTRL 3] control to set the MIDI SYNC value.
11. Hold down [FUNC] and press [11].
12. Turn the [CTRL 3] control to set the INPUT GAIN value.
13. Hold down [FUNC] and press [12].
14. Turn the [CTRL 3] control to set the OUTPUT GAIN value.
15. Switch off the power.

14
Sep. 2009 SP-404SX
Performing a Factory Reset
fig.Fct-flow-e.eps
Returning Only the Main Board
to the Factory-default State
1. With no SD card inserted, hold down the [CANCEL], [REMAIN], and
[DEL] buttons and switch on the power.
The message ini appears on the 7-segment LED display and the [REC]
button flashes.
2. Press the [REC] button to execute the factory reset.
* To quit, switch off the power.
A dot on the 7-segment LED display flashes. When the flashing stops, the
factory reset has finished.
* Never switch off the power while the dot is flashing. Doing so may result in data
corruption.
3. Switch off the power.
Returning the Main Board and
Customer SD Card to the Factory-
default State
If for some reason it becomes necessary to return not only the Main Board but
also the customer’s SD card to the factory-default state, follow the procedure
below to accomplish this.
The steps below are also the procedure to use to put a commercially available
SD card into the same state as the SD card shipped with the unit from the
factory.
Executing this procedure also returns the Main Board to its factory-default
state.
Returning an SD card received from the customer to its factory defaults causes
any data saved on the customer’s SD card to be lost. If necessary, make a
backup. (Refer to Data Backup and Restore Operations (p. 12).)
Items Required
• Computer (running Windows XP)
• SD card reader/writer
• SD card you want to return to the factory-default state (1 GB or larger)
• SP-404SX Utility CD-ROM (#5100008941)
Procedure
Copying Factory-default Data to the SD Card
1. Format the SD card on the SP-404SX. (Refer to Formatting an SD Card
(p. 12).)
2. Using the computer, copy the FCTRY folder on the SP-404SX Utility CD-
ROM to the root directory of the SD card.
*TheFCTRY folder on the SP-404SX Utility CD-ROM contains the factory-
default data.
3. Switch off the power.
Executing a Factory Reset for the Main Board and
SD Card
4. Insert the SD card from step 2into the SP-404SX, then hold down the
[CANCEL] button and switch on the power.
The message P.oF appears on the 7-segment LED display, and the write
protection of all banks of samples and patterns is canceled.
5. Switch off the power.
6. Hold down the [CANCEL], [REMAIN], and [DEL] buttons and switch on
the power.
The message ini appears on the 7-segment LED display and the [REC]
button flashes.
* To cancel the factory reset, switch off the power at this time.
The Main Board was
defective, and repair or replacement
was carried out.
You also want to
return the customer's SD card to
its factory-default state.
You also want to
return the customer's SD card to
its factory-default state.
The destination setting
was veried to be correct
in Test Mode item 10.
Start
YES
NO
NO
YES
YES
NO
Not correct
Correct
Carry out the procedure in
“ReturningOnly the Main Board
to the Factory-default State”.
Carry out the procedure in
“Returningthe Main Board
and Customer SD Card to
the Factory-default State”.
Prepare a different SD card that
can safely be overwritten, then
carry out the procedure in “Saving
the Destination Settingon the
Main Board” using this SD card.
Carry out the procedure in
“Savingthe Destination
Settingon the Main Board”
using the customer's SD card.

15
Sep. 2009 SP-404SX
7. Pressing the [REC] button executes the factory reset, and the data
corresponding to the destination setting is unarchived onto the SD card.
A dot on the 7-segment LED display flashes. When the flashing stops, the
factory reset has finished.
* Never switch off the power while the dot is flashing. Doing so may result in data
corruption.
8. Switch off the power.
Saving the Destination Setting on
the Main Board
When the Main Board has been serviced or replaced, after verifying that the
destination setting is correct, if necessary, execute the operation described
here.
This procedure as well can be used to return the SD card to a factory-default
state that corresponds to the destination.
Items Required
• Computer (running Windows XP)
• SD card reader/writer
• SD card that can safely be overwritten
• SP-404SX Utility CD-ROM (#5100008941)
Procedure
1. Format the SD card on the SP-404SX. (Refer to Formatting an SD Card
(p. 12).)
2. Using the computer, copy the FCTRY folder on the SP-404SX Utility CD-
ROM to the root directory of the SD card.
* The FCTRY folder on the SP-404SX Utility CD-ROM contains the factory-
default data.
3. Switch off the power.
4. Insert the SD card from step 2into the SP-404SX.
5. Hold down the [VOICE TRANS], [DJFX LOOPER], and [HOLD] buttons
and switch on the power.
The Test Mode is enabled.
6. Hold down the [TAP TEMPO] button and press pad [10].
The message PrE appears on the 7-segment LED display.
7. Press the pad that corresponds to the destination (voltage) you want to
set.
The pressed pad lights up and the [MIC] button flashes.
8. Press the [MIC] button.
Unarchiving of the destination data starts. The message Lod appears on
the 7-segment LED display, and the dot at the rightmost character
flashes.
* Never switch off the power while the dot is flashing. Doing so may result in data
corruption.
* If the message Sd appears, reinsert the SD card.
* If the message Err appears, switch off the power, then redo the procedure from
step 5.
When data unarchiving has finished, the message CPL or ErP appears
and the pad corresponding to the specified destination lights up.
9. Verify that the setting for the correct destination has been made.
10. Switch off the power.
Updating the System
Items Required
• Computer (running Windows XP)
• SD card reader/writer
• SD card (blank; 1 GB or larger)
• SP-404SX Update Data (obtained via Service Net)
Creating the Update-use SD Card
1. Format the SD card on the SP-404SX. (Refer to Formatting an SD Card
(p. 12).)
2. Insert the formatted SD card into the SD card reader/writer connected to
the computer.
3. Copy the update data (sp404sx_up.bin) to the root directory of the SD
card.
4. Eject the SD card from the SD card reader/writer.
Update Procedure
1. Make sure the power to the SP-404SX is off.
2. Insert the update-use SD card into the SP-404SX.
3. Switch on the power to the SP-404SX.
The update starts automatically.
When the display read-out reaches 000 Fin, the update is complete.
4. Switch off the power and eject the update-use SD card.
5. Verify the version numbers as described in Verifying the Version
Numbers (p. 12).
Corrective Action for a Failed Update
• Switch the power off and back on, then execute the update again.
• If the update still cannot be accomplished correctly, it is likely that the
update-use SD card was not created properly. Carry out the procedure to
create the update-use SD card again.
• If the update still cannot be accomplished, replace the Main Board.
Destination (voltage) Pad
117VU, 117VU/CS, 117VBL 1
230VEU, 230VE, 240VA, 220VCNR, 220VK 2
100V 3

16
Sep. 2009 SP-404SX
Test Mode
Items Required
• Signal generator
• Oscilloscope
•Noisemeter
• MIDI device for sending Active Sensing messages (UM-1, MC-909,
Fantom, V-Synth, or the like)
•Microphone
•MIDIcable
•Audiocables
• SD card (blank; 1 GB or larger)
• Test-mode start-up file: ServTest_SP-404SX.txt (obtained via Service Net)
Connections
fig.test-connect.eps
* Connect the MIDI device for sending Active Sensing (FE) messages (UM-1,
MC-909, Fantom, V-Synth, or the like) to MIDI IN. If the Test Mode is entered
without making this connection, then at 2. DEVICE (p. 16), an error occurs and
pad [7] lights up.
Preparing the SD Card for Test-mode Use
1. Format the SD card on the SP-404SX. (Refer to Formatting an SD Card
(p. 12).)
2. Insert the formatted SD card into the SD card reader/writer connected to
the computer.
3. Copy the Test-mode start-up file (ServTest_SP-404SX.txt) to the root
directory of the SD card.
Entering the Test Mode
1. Make sure the power to the unit is switched off.
2. Adjust the MIC LEVEL control to MIN.
3. Insert the SD card for Test-mode use into the unit’s SD card slot.
4. Switch on the power.
The Test Mode starts automatically.
Quitting the Test Mode
Switch off the power.
Selecting Test Items
Holding down the [TAP TEMPO] button and pressing a pad from [1] to [11]
jumps to the test item corresponding to the number of the pressed pad, even
while testing is in progress. For the correspondences between the numbers and
the test items, refer to the following section.
Test Items
1. VERSION (p. 16)
2. DEVICE (p. 16)
3. PHONES (p. 17)
4. LINE IN/OUT (p. 17)
5. MIC IN (EXTERNAL) (p. 17)
6. MIC IN (INTERNAL) (p. 17)
7. SW/LED (p. 17)
8. A/D (p. 17)
9. MUTE/VOLUME/SD CARD (p. 17)
10. Residual-noise Measurement/Destination-setting
Verification (p. 18)
11. COMPLETED/ERP (p. 18)
1. VERSION
Entering the Test Mode displays the version of the application program
on the 7-segment LED display.
Pressing [B/G] displays the version of the boot program.
Pressing [A/F] displays the version of the application program.
Pressing the [MIC] button makes execution advance to the next item.
2. DEVICE
fig.test02.eps
Each respective device is tested automatically. The dot at the rightmost
character of the 7-segment LED display flashes while testing is in
progress.
If a device is found to have a problem, the corresponding pad lights up.
Press the [MIC] button to advance to the next item.
* If a device is found to have a problem, holding down the [TAP TEMPO] button
and pressing pad [3] forces execution to advance to the next item.
Pad number Device
1NOR FLASH
2SDRAM1
3SDRAM2
4SDRAM (WSP)
5WSP
6SD CARD
7MIDI
8AUDIO DEVICE

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Sep. 2009 SP-404SX
3. PHONES
fig.test03.eps
1. Input a 1-kHz sine wave at -10 dBu from the signal generator to the
LINE IN L connector.
2. Turn the VOLUME control all the way clockwise to adjust it to MAX.
3. Verify that the output from the left (L) channel of the PHONES jack is a
sine wave at -3 dBu (±3 dB), and that no output comes from the right (R)
channel.
4. Input a 1-kHz sine wave at -10 dBu from the signal generator to the
LINE IN R connector.
5. Verify that the output from the right (R) channel of the PHONES jack is a
sine wave at -3 dBu (±3 dB), and that no output comes from the left (L)
channel.
6. Press the [MIC] button to advance to the next item.
4. LINE IN/OUT
fig.test04.eps
1. Input a 1-kHz sine wave at -10 dBu from the signal generator to LINE IN
L.
2. Verify that the output from the LINE OUT L connector is a sine wave at -
13 dBu (±3 dB).
3. Input a 1-kHz sine wave at -10 dBu from the signal generator to LINE IN
R.
4. Verify that the output from the LINE OUT R connector is a sine wave at -
13 dBu (±3 dB).
5. Increase the input signal and verify that the PEAK indicator lights up.
* The indicator lights up at about +5 dBu.
6. Press the [MIC] button to advance to the next item.
5. MIC IN (EXTERNAL)
fig.test05.eps
1. Connect an external microphone and input audio, and verify that the
signal is output from PHONES L and Ror LINE OUT L and R.
2. Slowly turn the MIC LEVEL control clockwise, and verify that the output
level rises.
3. Press the [MIC] button to advance to the next item.
6. MIC IN (INTERNAL)
fig.test06.eps
1. Turn the VOLUME control all the way clockwise to adjust it to MAX.
2. Input audio into the internal microphone at the bottom right of the top
panel, and verify that the signal is output from PHONES L and Ror LINE
OUT L and R.
3. Press the [MIC] button to advance to the next item.
7. SW/LED
1. Verify that the two locations near the Roland logo and BPM/VALUE
above and below the display simultaneously light up in alternating red
and blue.
2. Verify that the 7-segment LED display lights up in sequence.
3. Press the buttons whose LEDs light up.
The [FILTER+DRIVE] button lights up first.
Pressing the button makes it go dark, and the next button lights up.
The buttons light up in succession, moving from the upper left of the top
panel to the lower right. Pressing the [MIC] button, which is the last one,
makes the message CAn appear on the 7-segment LED display.
4. Press the [CANCEL] button.
The message rEN appears on the 7-segment LED display.
5. Press the [REMAIN] button.
Operation automatically advances to the next item.
8. A/D
fig.test08-1.eps
1. Turn the [CTRL 1] control all the way clockwise, and verify that a
message like the one shown below appears on the 7-segment LED
display.
fig.test08-2.eps
2. In the same way, turn the control all the way counterclockwise, and
verify that a dot is displayed at the lower right of the 8.
fig.test08-3.eps
3. Carry out steps 1and 2for the [CTRL 2] and [CTRL 3] controls in the
same way.
When the three controls have been verified to work correctly, execution
automatically advances to the next item.
9. MUTE/VOLUME/SD CARD
The message MUt appears on the 7-segment LED display, and a sine
wave is played.
1. Press the [MIC] button.
2. Verify that the [MIC] button lights up goes dark and the audio is muted.
3. Press the [MIC] button.
4. Verify that the [MIC] button goes dark lights up and the audio is heard
again.
The message rMV appears on the 7-segment LED display.
* When the message SD appears, again insert the SD card for Test-mode use.
5. Eject the SD card for Test-mode use.
6. When the message SD appears, again insert the SD card for Test-mode
use.
Operation automatically moves to the next item.

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Sep. 2009 SP-404SX
10. Residual-noise Measurement/
Destination-setting Verification
The message PrE appears on the 7-segment LED display.
This item was originally intended for saving destination data on the Main
Board and the SD card included when the unit was shipped from the
factory, but here it is used to measure the unit’s residual noise and to
verify the destination setting saved on the Main Board.
In particular, when servicing or replacing the Main Board, be sure to
check the destination-specific setting, and save the destination setting if
necessary.
* For information on the procedure for saving destination data on the Main Board
and the SD card, refer to Performing a Factory Reset (p. 14).
1. Verify the destination setting.
One of the pads from [1] to [3] flashes to indicate the destination. The
relationships between the pads and the destinations are as follows.
* If the correct destination has not been set, follow the procedure described in
Saving the Destination Setting on the Main Board (p. 15) to set the
correct destination.
2. Connect the noise meter to OUTPUT L.
3. Set the noise meter to DIN AUDIO.
4. Verify that noise is -66 dBu or less.
5. In the same way, verify that residual noise at OUTPUT R and at PHONES
is -66 dBu or less.
6. Hold down the [TAP TEMPO] button and press pad [11] to advance to
the next item.
11. COMPLETED/ERP
The message CPL or ErP appears on the 7-segment LED display.
Switch off the power.
When the message CPL appears, switch off the power.
When the message ErP appears, press the [MIC] button to switch off the
power, and return the [POWER] switch to the OFF position.
This completes the testing.
Destination (voltage) Pad
117VU, 117VU/CS, 117VBL 1
230VEU, 230VE, 240VA, 220VCNR, 220VK 2
100V 3

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Sep. 2009 SP-404SX

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Sep. 2009 SP-404SX
Block Diagram/Wiring Diagram
fig.BLOCK.eps@L