Roland BOSS AD-2 is a compact acoustic preamplifier that enhances the natural sound of your acoustic guitar. With its three-band EQ, Ambience, and Notch controls, the AD-2 lets you shape your sound to perfection, whether you're playing solo or with a band. The built-in tuner ensures you're always in tune, and the XLR output lets you connect directly to a PA system for live performances.
Roland BOSS AD-2 is a compact acoustic preamplifier that enhances the natural sound of your acoustic guitar. With its three-band EQ, Ambience, and Notch controls, the AD-2 lets you shape your sound to perfection, whether you're playing solo or with a band. The built-in tuner ensures you're always in tune, and the XLR output lets you connect directly to a PA system for live performances.
SERVICE NOTES
Issued by RJA
Copyright © 2015 Roland Corporation
All rights reserved. No part of this publication may be reproduced in any form without the written permission
of Roland Corporation.
CC-OKN17057070E0
Nov. 2015 AD-2
Table of Contents
Cautionary Notes ..............................................................2
Specifications .....................................................................3
Location of Controls .........................................................4
Location of Controls Parts List........................................5
Exploded View ..................................................................6
Exploded View Parts List.................................................7
Important Notes on Assembly ........................................7
Parts List.............................................................................8
Verifying the Version......................................................10
Data Backup and Restore Operations ..........................10
Performing a Factory Reset............................................10
Updating the System ......................................................10
Test Mode.........................................................................10
Circuit Board (Main, VR, Input, SW, LED Board)......14
Circuit Diagram (Main, Input, LED Board).................16
Circuit Diagram (Main, VR, SW Board).......................18
2
Nov. 2015 AD-2
Cautionary Notes
Before beginning the procedure, please read
through this document. The matters described may
differ according to the model.
No User Data
This product cannot save user data. Backing up user data during servicing is
not required.
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.
Roland Japan Warranty
Please send the problem report with followings when the defect occurred
within one year from production and within one month from the first
customer’s purchase.
• Model name:
• Serial number:
•Version:
• Purchase date by the first customer: yyyy/mm/dd
•Symptom:
• Frequency: always, sometimes or seldom
• Confirmed the symptom at your service dept: Yes/No
Please send the problem report to [email protected].
3
Nov. 2015 AD-2
Specifications
BOSS AD-2: Acoustic Preamp
Nominal Input Level
-20 dBu
Input Impedance
10 MΩ
Nominal Output Level
OUTPUT jack: -20 dBu
LINE OUT jack: -20 dBu
Output Impedance
OUTPUT jack: 1 kΩ
LINE OUT jack: 600 Ω
Recommended Load Impedance
OUTPUT jack: 10 kΩ or greater
LINE OUT jack: 600 Ω or greater
Bypass
Buffered bypass
Controls
Pedal switch
ACOUSTIC RESONANCE knob
AMBIENCE knob
NOTCH knob
Indicator
CHECK indicator (Serves also as battery check indicator)
Connectors
INPUT jack: 1/4-inch phone type
OUTPUT jack: 1/4-inch phone type
LINE OUT jack: 1/4-inch TRS phone type
DC IN jack
Power Supply
Alkaline battery (9V, 6LR61) or Carbon-zinc battery (9V, 6F22)
AC adaptor (sold separately)
Current Draw
55 mA
Expected battery life under continuous use (These
figures will vary depending on the actual
conditions of use.)
Alkaline: Approx. 6 hours
Dimensions
73 (W) x 129 (D) x 59 (H) mm
2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches
Weight (including battery)
450 g
1 lb
Accessories
Owner’s Manual (#5100053376)
Leaflet ("USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and
“Information") (#********)
Alkaline battery (9V, 6LR61) (#********)
Option (sold separately)
AC adaptor (PSA series)
* 0 dBu = 0.775 Vrms
* 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.
4
Nov. 2015 AD-2
Location of Controls
fig.panel.eps
31 14
8
5
6
7
2
5
Nov. 2015 AD-2
Location of Controls Parts List
No. Part Code Part Name Description Q’ty
1 5100007869 R-KNOB INDEX G2477526R1 2
5100006351 POTENTIOMETER(F3229202R0) RD901F-40-15FW-B50K-00DQ7 2
40128923 HEX NUT M7 H5039521R0 2
2 04238745 R-KNOB INDEX 1
5100054565 ROTARY POTENTIOMETER RD901F-40-125FW-B50K-00D94A 1
40128923 HEX NUT M7 H5039521R0 1
3 5100053031 DC JACK KM02018ASBM1P 1
4 05015956 LED L-7104SRT (F5229820R0) 1
5100053852 LED SPACER LEDS-8.5S 1
5 5100001341 6.5MM JACK HTJ-064-12DMP 1
5100003918 JACK NUT M9X12X2 NI RTC(H5039510R0) 1
5100003926 PLAIN WASHER 9X13.5X0.5T NI(H5039158R0) 1
5100008086 INT TOOTH WASHER 9.5X12.5X0.5 NI RTC(H5039205R0) 1
5100015893 PLAIN WASHER 9.2X14X1.6 NI (H5039104R0) 1
6 5100001341 6.5MM JACK HTJ-064-12DMP 1
5100003918 JACK NUT M9X12X2 NI RTC(H5039510R0) 1
5100003926 PLAIN WASHER 9X13.5X0.5T NI(H5039158R0) 1
5100008086 INT TOOTH WASHER 9.5X12.5X0.5 NI RTC(H5039205R0) 1
5100015893 PLAIN WASHER 9.2X14X1.6 NI (H5039104R0) 1
5100015900 PLAIN WASHER 9.6X14XW11X1.0 AL (22137709R0) 1
7 01903234 6.5MM JACK HTJ-064-13D 1
5100003918 JACK NUT M9X12X2 NI RTC(H5039510R0) 1
5100003926 PLAIN WASHER 9X13.5X0.5T NI(H5039158R0) 1
5100008086 INT TOOTH WASHER 9.5X12.5X0.5 NI RTC(H5039205R0) 1
8 5100007512 THUMB SCREW (FOR REPAIR ONLY) 1
6
Nov. 2015 AD-2
Exploded View
fig.bunkai.eps
28
29
30
31
32
33
1
2
6
5
11
18
18
19
19
17
10
16
13
3
7
8
12
14
15
9
20
4
21
22
25
24
23
26
26
27
7
Nov. 2015 AD-2
Exploded View Parts List
Important Notes on Assembly
Orientation of the Input Board When
Attaching
Attach the Input Jack Board so that the board is directed to the SW Board
side.
fig.kumitate-Input-1.eps
Shaping the Wirings and the Ribbon Cable
Give attention to the following points to shape the wirings and the ribbon
cable.
fig.kumitate-2-e.eps
No. Part Code Part Name Description Q’ty
1 5100007869 R-KNOB INDEX G2477526R1 2
2 04238745 R-KNOB INDEX 1
3 40128923 HEX NUT M7 H5039521R0 3
4 05015956 LED L-7104SRT (F5229820R0) 1
5 5100008294 PEDAL PLATE (22357304R0) 1
6 5100053362 PEDAL 1
7 5100008092 PLAIN WASHER 3X6X0.5 RESIN RTC(H5039708R0) 2
8 40010267 SCREW M3X10 BINDING MACHINE FE BZC 2
9 5100053361 CASE 1
10 5100007503 BATTERY CUSHION (22267333R0) 1
11 5100007512 THUMB SCREW (FOR REPAIR ONLY) 1
12 5100007872 BATTERY CONNECTOR 006P BATTERY SNAP (F3419102R1 1
13 5100007504 COIL SPRING (22177109R0) 1
14 5100024133 SWITCH(PUSH) PS017-N11AA(F3129517R0) 1
15 5100014487 COMPACT PSA LABEL 1
16 5100042824 TRS LABEL 1
17 5100007505 PEDAL GUIDE BUSH (FOR REPAIR ONLY) 1
18 5100003918 JACK NUT M9X12X2 NI RTC(H5039510R0) 3
19 5100003926 PLAIN WASHER 9X13.5X0.5T NI(H5039158R0) 3
5100053188 MAIN SHEET ASSY 1
* This unit includes the following parts.
20 ******** SW BOARD 1
22 ******** VR BOARD 1
23 ******** INPUT BOARD 1
28 ******** MAIN BOARD 1
21 5100053852 LED SPACER LEDS-8.5S 1
24 5100017222 JACK BOARD ASSY (75D283U0R0) 1
25 5100015900 PLAIN WASHER 9.6X14XW11X1.0 AL (22137709R0) 1
26 5100008086 INT TOOTH WASHER 9.5X12.5X0.5 NI RTC(H5039205R0) 3
27 5100015893 PLAIN WASHER 9.2X14X1.6 NI (H5039104R0) 2
29 5100022073 INSULATING SHEET 4-5.5X5.5(751043W0R0) 1
30 5100006632 BOTTOM COVER (22027851R0) 1
31 5100006633 BOTTOM FOOT (22357305R0) 1
32 5100039561 CAUTION SEAL PSA (FCC/EMI) VER.2 1
33 5100007965 SCREW 3X6(H5029325R0) PAN TAPPING B1 BZC 4
Pich the ribbon cable with
the fingers and shape it.
Pass the wirings next to
the Jack Board and push
them toward the front.
Bend it at the central
position and push it
toward the front to shape.
8
Nov. 2015 AD-2
Parts List
fig.-part1-e.eps
Note: The parts marked # are new. (initial parts) The description “Q’ty” means a necessary number of the parts per one product.
Due to one or more of the following reasons, parts with parts code ******** cannot be supplied
as service parts.
• Supply is prohibited due to copyright restrictions.
• It is carried in electronic data on the Roland web site.
• The part is made to order (at current market price).
• It can be replaced with an article on the market. (battery or etc.)
• It is a package or an accessory irrelevant to the function maintenance of the main body.
• A number of circuit boards are grouped together and supplied as a single circuit board (under a different part code).
• Reissuance is restricted.
• It is supplied as an assembled part
(under a different part code).
Safety Precautions:
The parts marked have
safety-related characteristics. Use
only listed parts for replacement.
CASING
5100008294 PEDAL PLATE (22357304R0) 1
# 5100053362 PEDAL 1
# 5100053361 CASE 1
5100006632 BOTTOM COVER (22027851R0) 1
KNOB, BUTTON
04238745 R-KNOB INDEX 1
5100007869 R-KNOB INDEX G2477526R1 2
SWITCH
5100024133 SWITCH(PUSH) PS017-N11AA(F3129517R0) 1
JACK, EXT TERMINAL
5100001341 6.5MM JACK HTJ-064-12DMP 2
01903234 6.5MM JACK HTJ-064-13D 1
# 5100053031 DC JACK KM02018ASBM1P 1
PWB ASSY
# 5100053188 MAIN SHEET ASSY 1
* This unit includes the following parts.
******** MAIN BOARD 1
******** VR BOARD 1
******** SW BOARD 1
******** INPUT BOARD 1
5100017222 JACK BOARD ASSY (75D283U0R0) 1
DIODE
05015956 LED L-7104SRT (F5229820R0) 1
POTENTIOMETER
5100006351 POTENTIOMETER(F3229202R0) RD901F-40-15FW-B50K-00DQ7 2
# 5100054565 ROTARY POTENTIOMETER RD901F-40-125FW-B50K-00D94A 1
WIRING, CABLE
5100007872 BATTERY CONNECTOR 006P BATTERY SNAP (F3419102R1 1
5100017229 WIRING (H4009604R0) UL1007 OS-1 AWG24 GRY 90X3X3 1
5100017228 WIRING (H4009622R0) UL1007 OS-1 AWG24 WHT 90X3X3 1
5100017230 WIRING (H3999505R0) UL1007 OS-1 AWG24 YEL 90X3X3 1
SCREWS
40010267 SCREW M3X10 BINDING MACHINE FE BZC 2
5100007965 SCREW 3X6(H5029325R0) PAN TAPPING B1 BZC 4
5100007512 THUMB SCREW (FOR REPAIR ONLY) 1
40128923 HEX NUT M7 H5039521R0 3
5100003918 JACK NUT M9X12X2 NI RTC(H5039510R0) 3
5100008092 PLAIN WASHER 3X6X0.5 RESIN RTC(H5039708R0) 2
5100003926 PLAIN WASHER 9X13.5X0.5T NI(H5039158R0) 3
5100015893 PLAIN WASHER 9.2X14X1.6 NI (H5039104R0) 2
5100015900 PLAIN WASHER 9.6X14XW11X1.0 AL (22137709R0) 1
5100008086 INT TOOTH WASHER 9.5X12.5X0.5 NI RTC(H5039205R0) 3
9
Nov. 2015 AD-2
MISCELLANEOUS
5100007503 BATTERY CUSHION (22267333R0) 1
5100006633 BOTTOM FOOT (22357305R0) 1
5100007504 COIL SPRING (22177109R0) 1
5100039561 CAUTION SEAL PSA (FCC/EMI) VER.2 1
5100014487 COMPACT PSA LABEL 1
5100020413 EARTH TERMINAL 2
5100022073 INSULATING SHEET 4-5.5X5.5(751043W0R0) 1
# 5100053852 LED SPACER LEDS-8.5S 1
5100007505 PEDAL GUIDE BUSH (FOR REPAIR ONLY) 1
5100039561 CAUTION SEAL PSA (FCC/EMI) VER.2 1
5100014487 COMPACT PSA LABEL 1
5100042824 TRS LABEL 1
ACCESSORIES (Standard)
# 5100053376 OWNER’S MANUAL MULTILANGUAGE 1
10
Nov. 2015 AD-2
Verifying the Version
Perform verification in the Test mode.
Data Backup and Restore
Operations
This product cannot save user data. Backing up user data during
servicing is not required.
Performing a Factory Reset
This product has no factory-reset feature.
Updating the System
A system update cannot be performed for this product. If an update is
required, replace with an updated circuit board. Update of the circuit
board can be accomplished only at the factory.
Test Mode
Items Required
• AC adaptor (PSA-series device)
• Amp-equipped monitor speaker x 1
• Oscillator x 1
• Oscilloscope x 1
• Noise meter x 1
• 1/4-inch phone plug with 10-kΩ load resistor
• 1/4-inch monaural phone cable (1/4-inch monaural phone plug <–>
1/4-inch monaural phone plug)
• Monaural cable (1/4-inch monaural phone plug <-> RCA phono plug)
• Y cable (1/4-inch stereo phone plug <-> RCA phono plug x 2)
• Conversion plug (RCA phono jack –> 1/4-inch monaural phone plug)
•Tester
• Current-consumption measurement tool
fig.check-cable.eps
Inspection Items
1. Version Confirmation (p. 10)
2. Measurement of Current Consumption (p. 10)
3. Volume and AD/DA Test (p. 11)
4. Noise Test (p. 11)
5. Bypass Test (p. 12)
6. LED and Battery Operation Test (p. 12)
Some items involve testing while in the test mode, and others involve
testing in the normal usage state. For detailed information, refer to the
procedures for the respective test items described later in this document.
Entering the Test Mode
1. Set each knob as shown below.
AMBIENCE: Minimum
ACOUSTIC RESONANCE: Minimum
NOTCH: Maximum
2. Hold down the pedal and insert a 1/4-inch monaural phone plug into the
INPUT jack.
The power comes on and CHECK LED lights up, and after approximately
two seconds, the CHECK LED flashes and the unit enters the test mode.
Quitting the Test Mode
After entering the test mode and displaying the version, depress the
pedal. Alternatively, disconnect the plug from the INPUT jack to switch
off the power.
1. Version Confirmation
When the unit enters the test mode, the CHECK LED flashes, and the
number of flashes indicates the version.
Examples: Blinks one time: Ver. 1.00
Blinks two times: Ver. 1.01
Blinks three times: Ver. 1.02
2. Measurement of Current Consumption
1. Use the current-consumption measurement tool to connect the AC
adaptor and the tester.
2. Connect a 1/4-inch monaural phone cable to the OUTPUT jack.
3. Hold down the pedal and connect another plug of the cable in step 2 to
the INPUT jack.
The unit starts up in the test mode.
fig.test-1-e.eps
4. Verify that current consumption is 50 mA or lower.
PSA-
ADAPTOR
Tester
11
Nov. 2015 AD-2
3. Volume and AD/DA Test
1. As shown in the figure, connect the conversion plug (RCA phono jack ->
1/4-inch monaural phone plug) to the INPUT jack and start up in the test
mode, and then, using a monaural cable (1/4-inch monaural phone plug
<-> RCA phono plug), connect the OUTPUT jack to the conversion plug.
fig.test-2-7.eps
2. Verify that the CHECK LED lights up.
3. Turn the NOTCH knob all the way counterclockwise.
4. Turn the AMBIENCE knob to near the eleven o’clock position, and verify
that the CHECK LED goes dark.
5. Turn the AMBIENCE knob to near the one o’clock position, and verify
that the CHECK LED lights up.
6. Turn the AMBIENCE knob all the way clockwise, and verify that the
CHECK LED goes dark.
7. Carry out steps 4 through 6 for the NOTCH and ACOUSTIC
RESONANCE knobs as well.
Turning the ACOUSTIC RESONANCE knob all the way clockwise
causes the OUTPUT circuit test to be executed automatically.
The CHECK LED lights up steadily if the test results are OK, or flashes if
the results are not OK.
8. Detach the monaural cable (1/4-inch monaural phone plug <-> RCA
phono plug).
* Do not disconnect the conversion plug. If it is disconnected, the power is
switched off and the unit exits the test mode.
9. Using the Y cable (1/4-inch stereo phone plug/RCA phono plug x 2),
connect the tip of the LINE OUT jack (stereo) to the conversion plug
connected to the INPUT jack.
fig.test-2-2.eps
10. Depress the pedal.
The CHECK LED goes dark, and the test of the LINE OUT (tip) circuit is
carried out automatically.
The CHECK LED lights up steadily if the test results are OK, or flashes if
the results are not OK.
11. In the same way, connect the ring of the LINE OUT jack (stereo) to the
conversion plug.
fig.test-2-3.eps
12. Depress the pedal.
The CHECK LED goes dark, and the test of the LINE OUT (ring) circuit is
carried out automatically.
The CHECK LED lights up steadily if the test results are OK, or flashes if
the results are not OK.
4. Noise Test
1. Make the connections as shown in the figure below, then start the unit in
the normal usage state.
fig.test-3.eps
2. Set each knob as shown below.
AMBIENCE: Maximum
ACOUSTIC RESONANCE: Maximum
NOTCH: Minimum
3. Connect the amp-equipped monitor speaker to the OUTPUT jack.
4. Press the pedal several times, and verify that no switching noise occurs
and that no wires are pinched between the switch and the pedal.
5. Depress the pedal to make the CHECK LED light up.
The effect is switched on.
6. Subject the unit to impact (by dropping it from a height of about 5 cm),
and verify that no abnormal noise is heard from the speaker.
7. Connect the noise meter to the OUTPUT jack.
8. Verify that residual noise is -94 dBm or less (DIN-Audio).
9. Using the Y cable (1/4-inch stereo phone plug <-> RCA phono plug x 2),
connect the noise meter to the tip of the LINE OUT jack (stereo).
PSA-
ADAPTOR
PSA-
ADAPTOR
RING
TIP
PSA-
ADAPTOR
TIP
RING
PSA-
ADAPTOR
10k short PLUG
12
Nov. 2015 AD-2
10. Verify that residual noise is -94 dBm or less (DIN-Audio).
11. In the same way, connect the noise meter to the ring of the LINE OUT jack
(stereo).
12. Verify that residual noise is -94 dBm or less (DIN-Audio).
13. Depress the pedal to make the CHECK LED go dark.
The effect is switched off.
14. Connect the noise meter to the OUTPUT jack.
15. Verify that residual noise is -99 dBm or less (DIN-Audio).
16. Using the Y cable (1/4-inch stereo phone plug <-> RCA phono plug x 2),
connect the noise meter to the tip of the LINE OUT jack (stereo).
17. Verify that residual noise is -96 dBm or less (DIN-Audio).
18. In the same way, connect the noise meter to the ring of the LINE OUT jack
(stereo).
19. Verify that residual noise is -96 dBm or less (DIN-Audio).
5. Bypass Test
1. Make the connections as shown in the figure below, then start the unit in
the normal usage state.
fig.test-4.eps
2. Depress the pedal to make the CHECK LED go dark.
The effect is switched off.
3. Input signals like those shown below from the oscillator, and verify that
the output signals are at the corresponding values.
* Set the filter on the noise meter to Flat or DIN-Audio.
6. LED and Battery Operation Test
1. Insert a battery into the unit, make the connections as shown in the figure,
then start the unit in the normal usage state.
fig.test-5-e.eps
2. Set the output voltage of the stabilized power supply to 9.0 V.
3. Depress the pedal to make the CHECK LED light up.
4. Set the output voltage of the stabilized power supply to 7.5 V.
5. Verify that the CHECK LED dims.
6. Disconnect the plug from the DC jack.
7. Verify that the CHECK LED lights up brightly.
8. Depress the pedal several times, and verify that the CHECK LED
repeatedly lights up and goes dark.
9. With the CHECK LED illuminated, disconnect the plug from the INPUT
jack.
10. Verify that the CHECK LED goes dark.
Input Output
Frequency Value Waveform Value
50 Hz -3.0 dBm Sine wave -3.5 dBm±1.5 dBm
800 Hz -15.0 dBm Sine wave -15.5 dBm±1.5 dBm
1.6 kHz -15.0 dBm Sine wave -15.5 dBm±1.5 dBm
8 kHz -15.0 dBm Sine wave -16.0 dBm±1.5 dBm
PSA-
ADAPTOR
Stabilized
power supply
PLUG etc.
13
Nov. 2015 AD-2
14
Nov. 2015 AD-2
Circuit Board (Main, VR, Input, SW, LED Board)
fig.b-main-1.eps
15
Nov. 2015 AD-2
fig.b-main-2.eps
16
Nov. 2015 AD-2
Circuit Diagram (Main, Input, LED Board)
fig.d-main-1.eps@L
GND
GND
GND
A+8
GND
GND
CODEC-PDN
GND
CODEC-VCC
A+8
GND
CODEC-VCC
SD-DA
A+8
D+3.3
GND
A+1.7
BCK
MCK
LRCK
GND
GND
GND
A+4
A+1.7
A+8
A+8
GND
A+8
GND
GND
GND
GND
GND
PVCC
GND
GND
GNDGND
GND
GND GND
D+3.3 D+1.5
CODEC-VCC
GND
A+1.7
A+8
GND
GND
A+8
HTJ-064-13D
JK1
3
4
5
Q15
2SC4738-GR
1
23
Q16
2SC4738-GR
1
2
3
Q3
2SC4738-GR
1
23
Q11
2SC4738-GR
1
23
Q12
2SC4738-GR
1
23
IC7
NJM2115V(TE1)
3
1
2
IC7
NJM2115V(TE1)
5
7
6
NJM2115V(TE1)
IC7
48
AK4556VT-E2
IC1
2
LIN
1
RIN
13
SDTI
14
LRCK
15
MCLK
16
BCLK
7
DEM1
6
DEM0
17
PDN
12
CKS3
11
CKS2
10
CKS1
9
CKS0
3
VSS
18
VCOM
8
SDTO
20
ROUT
19
LOUT
5
VD
4
VA
D1
1SS362FV
22
33
1
1SS362FV
D8
2
3
1
10k
R27
1608
C97
47uF
25V
1k
R59
0.5%
1k
R43
0.5%
1k
R21
0.5%
2.2k
R57
0.5%
10k
R16
0.5%
10k
R9
0.5%
10k
R10
0.5%
10k
R15
0.5%
10k
R7
0.5%
10kR17
0.5%
10k
R4
0.5%
10k
R11
0.5%
10k
R5
0.5%
10k
R13
0.5%
12k
R48
0.5%
12k
R81
0.5%
15k
R64
0.5%
27k
R56
0.5%
27k
R44
0.5%
27k
R55
0.5%
33k
R18
0.5%
4.7k
R12
0.5%
5.6k
R3
0.5%
5.6k
R6
0.5%
100
R76
R54
47k
47k
R51
D7
GS1G-M4
D2
SR24
470
R87
3216
22pFC54
22pFC50
0.1uF
C22
0.1uF
C8
0.1uF
C9
0.1uF
C12
0.1uF
C36
0.1uF
C26
0.1uF
C34
C37
UnPop
0.1uF
C27
0.1uF
C39
0.1uF
C33
1000pF
C88
C67 10uF
16V
C103
10uF
16V
C62
10uF
16V
C60
10uF
16V
C68
10uF
16V
C10
C10
C100
10uF
16V
C20
10uF
16V
C106
10uF
16V
C61 10uF
16V
C105
10uF
16V
1.5k
R69
470
R14
0.5%
Q1
2SK880-GR
3
12
TER2
RC-3(T) COMPACT DIP EARTH TERMINAL
TER1
RC-3(T) COMPACT DIP EARTH TERMINAL
4.7
R20
1005
10M
R66
1608
33k
R30
IC6
NJM4
48
C98
UnPop
C69
22uF
16V
C96
100uF
16V
C64
100uF
16V
C65
47uF
16V
W5
W3
W16
W4
W6
W15
W7W8
TP26
TP108
TP3
TP5
TP6
TP29
TP28
TP80
TP124
TP24 TP121
TP21
TP120 TP119
TP118
TP103
TP116
TP35
TP130
TP88
TP146
TP39
TP40
TP85
TP77
TP75
TP86
TP87
TP37
TP8
TP53
TP14
TP83
TP33
TP34
TP74
TP90
TP36
TP59
TP22
TP60
D6
UDZV TE-17 11B
D5
UDZV TE-17 11B
4700pF
C93
0.033uFC90
33k
R45
0.5%
15k
R61
0.5%
2200pF
C94
0.047uFC84
L19
BLM15BD601SN1D
KM02018ASBM1P
JK4
2
3
1
5
4
0.018uF
C111
0.018uF
C51
10pF
C52
ITP1
ITP2
ITP3
C56
100uF
16V
2.2uF
C89
1608
0.1uF
C1
C63
100uF
16V
Connect to CHASSIS
AD-2 circuit
ASSY No. 75D113M0R0
PWB No. F2927166R0 00(1/4)
INPUT BOARD
[3/4]
WIRING
UL1185-26AWG*1C BLK
WHTTE
BLACK
WHITE
BLACK
BLUE
BATTERY 006P
MAIN BOARD[1/4]
ANALOG / POWER
-8.11dB
+15.4dB
Film
17
Nov. 2015 AD-2
fig.d-main-1.eps@R
DSP-MUTE
GND
GND
GND
PVCC
GND
GND
A+8
GND
PVCC
BYPASS-MUTE
GND
A+4
A+4
A+8
GND
GND
A+4
A+4
A+4
A+4
SD-AD
GND
GND
GND
RST-DCDC
GND
GND
GND
GND
D+3.3
GND
GND
D+1.5
GND
GND
A+4
A+4
A+4
A+4
PVCC
FETSW-BYPASS
FETSW-BYPASS
FETSW-DSP
FETSW-DSP
D3
1SS387
D4
1SS387
D10
1SS387
D9
1SS387
Q2
2SC4738-GR
1
23
Q4
2SK879-Y
3
12
Q19
2SK879-Y
3
12
Q5
2SK879-Y
3
12
Q17
2SK879-Y
3
12
BD9851EFV-E2
IC8
9
OUT2
8
PVCC2
11
OUT1
12
PVCC1
18
VCC
20
GND
30
FIN
10
PGND
7
DTC2
5
INV2
6
FB2
13
DTC1
16
INV1
15
FB1
17
VREF
14
SCP
3
CT
2
RT
1
SEL1
19
STB
NON2
4
Q7
QS5U27TR(PB FREE)
34
QS5U27TR(PB FREE)
Q6
34
QS5U27TR(PB FREE)
Q6
1
52
QS5U27TR(PB FREE)
Q7
1
52
DTC114TUAT106
Q8
1
23
Q10
DTC114TUAT106
11
223
DTC114TUAT106
Q9
1
2
3
C92
470pF
JK3
HTJ-064-12DMP
1
3
2
JK2
HTJ-064-12DMP
1
3
2
C73
100uF
6.3V
C78
100uF
6.3V
5.6k
R22
0.5%
5.6k
R23
0.5%
10kR17
0.5%
15kR2
0.5%
15k
R28
0.5%
22k
R101
0.5%
22k
R102
0.5%
4.7k
R104
0.5%
4.7k
R103
0.5%
0
76
1k
R68
10k
R8
10k
R52
10k
R50
47k
R49
47k
R53
R106
100k
100k
R120
100k
R105
100k
R70
100k
R113
470k
R80
470k
R85
470k
R46
470k
R84
470k
R82
470k
R83
1M
R65
1M
R67
C59
4.7uF
35V
C70
4.7uF
35V
0.1uF
C22
C102 0.1uF
0.1uF
C133
0.1uF
C30
0.1uF
C25
0.1uF
C40
C58
10uF
16V
C99
10uF
16V
C107 10uF
16V
C104 10uF
16V
C71
10uF
16V
C123
10uF
16V
C120
10uF
16V
10uF
C17
2012
10uF
C38
2012
L2
BLM15BD601SN1D
L1
BLM15BD601SN1D
C117 UnPop
C128
UnPop
C129
UnPop
C55 UnPop
220pF
C72
10pFC124
10pFC125
IC10
NJM4580V-TE1-#Z#ZB
3
1
2
IC6
NJM4580V-TE1-#Z#ZB
3
1
2
IC6
NJM4580V-TE1-#Z#ZB
NJM4580V-TE1-#Z#ZB
IC10
4
8
0.027uF
C81
0.027uF
C82
150
R108
150
R109
150
R110
150
R107
100M
R95
2012
100M
R100
2012
100M
R93
2012
100M
R94
2012
C130
47uF
63V
C131
47uF
63V
C121
22uF
10V
C95
22uF
10V
220uH
VLCF5028T-221MR22-2
L3
CH-1-TP3
CH-1-TP5
CH-1-TP7
W19
W20
W9
TP91
TP92
TP93
TP96
TP98
TP99
TP43
TP45
TP12
TP4
TP135
TP139
TP129
TP131
TP122
TP125
TP124
TP117
TP116
TP123
TP16
TP152
TP153
TP154TP156
TP140
TP158TP159
TP44
TP95
TP97
TP41
TP38
TP7
TP25
TP151
TP155
TP157
TP89
TP42
90
TP18
TP17
IC10
NJM4580V-TE1-#Z#ZB
5
7
6
IC6
NJM4580V-TE1-#Z#ZB
5
7
6
220uH
VLCF5028T-221MR22-2
L4
3uF
7uF
2.7k
R58
0.5%
2.7k
R34
0.5%
6800pF
C53
6800pF
C116
0.1uFC122
CH-1 JACK BOARD
(OUTPUT BOARD)
Part No.22927687R0
OUTPUT (MONO)
LINE OUT (TRS)
TIP
RING
+8.56dB
+8.56dB
3.20V
1.44V
WHITE
YELLOW
GRAY
18
Nov. 2015 AD-2
Circuit Diagram (Main, VR, SW Board)
fig.d-main-2.eps@L
GND
D+3.3
RESET
VR-RESONANCE
VR-NOTCH
GND
PVCC
GND
RED-LED
GND
GND
VR-AMBIENCE
D+3.3
GND
VR+3.3
RST-DCDC
TC7W04FK
IC4
62
TC7W04FK
IC4
35
TC7W04FK
IC4
17
IC4
TC7W04FK
4
GND
8
VCC
C85 0.01uF
C66 0.01uF
C80 0.01uF
C14
0.1uF
0.1uF
C31
C101 10uF 2012
C201
10uF
2012
IC3
M24512-RMN6TP
E2E2
E1
E0
SDA
SCL
_WC
VSS
4
VCC
8
SW1
PS017-N11AA
1
1
2
W11
W13W14
W12
TP145
TP55
TP54
TP110
TP109
CN3
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
CN5
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
680
R73
GND
Q13
2SC4738-GR
1
23
R86
UnPop
TP46
22k
R75
TP78
27k
R74
TP76
TP31
TP30
47k
R37
L-7104SRT
LED1
12
Q14
2SA1832-GR
23
1
VR3
RD901F-40-15FW-B50K-00DQ7
13
2
VR1
RD901F-40-15FW-B50K-00DQ7
1
3
2
RD901F-40-15FW-B50K-00DQ7
VR1
10
VR1
20
RD901F-40-15FW-B50K-00DQ7
VR3
10
VR3
20
GND
VR2
RD901F-40-125FW-B50K-00D94A
1
3
2
RD901F-40-125FW-B50K-00D94A
VR2
10
VR2
20
To VR BOARD(CN5)
SW BOARD
[4/4]
ACOUSTIC RESONANCE
To MAIN BOARD(CN3)
AMBIENCE
VR BOARD[2/4]
RIBBON CABLE
8X112-P2.0
GREEN
NOTCH
CHECK
MIN
MAX
MIN
MAX
MIN
MAX
VIOLET
19
Nov. 2015 AD-2
fig.d-main-2.eps@R
D+3.3
D+3.3
GND
GND
GND
GND
GND
D+3.3
GND
D+3.3
GND
D+3.3
XWC
GND
XWC
GND
SD-AD
GND
GND
D+1.5
PVCC
GND
GND
GND
RED-LED
GND
D+3.3
BYPASS-MUTE
DSP-MUTE
CODEC-PDN
D+1.5
D+3.3
MCK
BCK
LRCK
SD-DA
RESET
10k
RA2
18
6
54
3
27
100
RA1
18
6
54
3
27
UPD800402GJ-211-UEN-A(ESC)
IC2
88
87
86
134
133
139
140
98
99
135
136
137
142
143
81
70
18
27
35
50
62
83
97
115
123
37
42
73
100
109
138
15
79
80
102
103
104
105
106
84
85
95
94
93
92
91
90
89
38
40
39
33
31
29
25
23
28
21
24
22
78
120
67
66
71
74
75
76
77
119
118
110
111
107
112
113
116
117
1
10
54
53
131
130
129
128
127
126
125
124
69
68
121
141
108
101
12
13
14
16
19
20
11
8
7
6
5
4
3
2
30
32
72
55
41
36
144
132
122
114
96
82
61
49
34
26
17
9
65
64
52
51
48
47
46
45
44
43
63
60
59
58
57
56
10pF
C87
10pF
C86
A2001WV2-6P
CN1 UnPop
1
2
3
4
5
6
1k
R72
4.7kR36
4.7k
R35
10k
R25
R31 10k
10kR26
10k
R92
10kR32
56k
R38
R71
UnPop
BD45431G-TR
IC5
5
VDD
3
GND
2
SUB
1
ER
4
VOUT
0.01uF
C79
0.1uFC7
0.1uFC13
0.1uFC16
0.1uFC19
0.1uF
C46
0.1uF
C11
0.1uFC5
0.1uF
C45
0.1uF
C44
0.1uFC47
0.1uF
C43
0.1uFC10
0.1uFC24
0.1uFC28
0.1uFC35
0.1uFC41
0.1uF
C18
0.1uFC49
0.1uFC23
0.1uF
C32
0.1uFC6
0.1uFC21
0.1uFC2
0.1uF
C42
0.1uF
C29
0.1uFC4
0.1uFC3
0.1uFC15
0.1uF
C48
C91
UnPop
10uF
C76
2012
10uFC77 2012
10uFC74 2012
10uF
C75
2012
3
2
1
5
6
7
11
13
TP136
TP137
TP67
TP66
TP65
TP64
TP13
TP11
TP27
TP9
TP132
TP57
TP63
TP52
TP61
TP58
TP56
TP10
TP101
TP100
TP126
TP51
TP50
TP49
TP127
TP48
TP47
TP102
TP2
TP62
TP20
TP19
TP71
TP72
TP69
TP68
TP70
DSX321G 16.9344MHZ
X1
1
4
NC
3
ESC:MODE1
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
-
19
Roland BOSS AD-2 is a compact acoustic preamplifier that enhances the natural sound of your acoustic guitar. With its three-band EQ, Ambience, and Notch controls, the AD-2 lets you shape your sound to perfection, whether you're playing solo or with a band. The built-in tuner ensures you're always in tune, and the XLR output lets you connect directly to a PA system for live performances.
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