Alesis BASSFIRE 60 User manual

Confidential Alesis Service Manual 8-31-0159-A
ALESIS
BassFire 60 (GB0)
Service Manual
P/N: 8-31-0159-A
The information in this document contains privileged and confidential information.
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you are not authorized, please contact Alesis and destroy all copies of this
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[email protected].
Copyright Alesis, LLC
ATTENTION!
THIS DOCUMENT CONTAINS SENSITIVE
PROPRIETARY INFORMATION.
ALL RECIPIENTS MUST HAVE A CURRENT
NON-DISCLOSURE AGREEMENT ON FILE
WITH ALESIS, LLC.
DO NOT MAKE ILLEGAL
COPIES OF THIS DOCUMENT

Confidential Alesis Service Manual 8-31-0159-A
Preface
This document is intended to assist the service technician in the operation,
maintenance and repair of the Alesis device. Together with the User Reference
Manual, this document provides a complete description of the functionality and
serviceability of the Device. Any comments or suggestions you may have
pertaining to the document are welcome and encouraged.
READ THIS!
In addition to any purchase price that Alesis may charge as consideration for Alesis selling or
otherwise transferring this service manual (“Manual”) to you, if you are not a service and repair
facility (“Service Center”) authorized by Alesis in writing to be an authorized Service Center,
Alesis sells or transfers the Manual to you on the following terms and conditions:
Only Service Centers authorized by Alesis in writing are authorized to perform service and repairs
covered by an Alesis warranty (if any), and transfer of the Manual to you does not authorize you
to be an authorized Service Center. Therefore, if you perform, or if the Manual is used to
perform, any service or repairs on any Alesis product or part thereof, any and all
warranties of Alesis as to that product and any service contract with Alesis for that
product shall be voided and shall no longer apply for such product, even if your services
or repairs were done in accordance with the Manual.
All service or repairs done by you or with reference to the Manual shall be solely your
responsibility, and Alesis shall have no liability for any such repairs or service work. All such
service or repairs are performed at the sole risk of the person performing the service or
repairs. You agree that all such work will be performed in a competent, professional and safe
manner at all times and to indemnify and fully hold Alesis and its successors and assigns
harmless in the event of any failure to so perform.
Your purchase of the Manual shall be for your own ultimate use and shall not be for purposes of
resale or other transfer.
As the owner of the copyright to the Manual, Alesis does not give you the right to copy the
Manual, and you agree not to copy the Manual without the written authorization of Alesis. Alesis
has no obligation to provide to you any correction of, or supplement to, the Manual, or any new or
superseding version thereof.
Alesis shall have the right to refuse to sell or otherwise transfer repair parts or materials to you in
its sole discretion. You shall not use, sell or otherwise transfer spare or replacement parts
supplied by Alesis to you (i) to repair or be used in products manufactured for or by third parties
or (ii) to any third parties for any purpose.
You shall not make any warranties or guarantees with respect to the products of Alesis or the use
thereof on behalf of Alesis or in your own name.
The foregoing describes the entire understanding related to sale or transfer of the Manual to you,
and no other terms shall apply unless in a writing signed by an authorized representative of
Alesis.
All Trademarks are property of their respective companies.

Confidential Alesis Service Manual 8-31-0159-A
Warnings
TO REDUCE THE RISK OF ELECTRIC SHOCK OR FIRE, DO NOT EXPOSE
THIS PRODUCT TO WATER OR MOISTURE.
The arrowhead symbol on a lightning flash inside a triangle is
intended to alert the user to the presence of un-insulated
"dangerous voltage" within the enclosed product which may be of
sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point inside a triangle is intended to alert the user
to the presence of important operating, maintenance and servicing
instructions in the literature which accompanies the product.
REPAIR BY ANY PERSON OR ENTITY OTHER THAN AN AUTHORIZED
ALESIS SERVICE CENTER WILL VOID THE ALESIS WARRANTY.
PROVISION OF THIS MANUAL DOES NOT AUTHORIZE THE RECIPIENT TO
COMPETE WITH ANY ALESIS DISTRIBUTOR OR AUTHORIZED REPAIR
SERVICE CENTER IN THE PROVISION OF REPAIR SERVICES OR TO BE
OR MAKE REPAIRS AS AN AUTHORIZED SERVICE CENTER.
ALL REPAIRS DONE BY ANY ENTITY OTHER THAN AN AUTHORIZED
ALESIS SERVICE CENTER SHALL BE SOLELY THE RESPONSIBILITY OF
THAT ENTITY, AND ALESIS SHALL HAVE NO LIABILITY TO THAT ENTITY
OR TO ANY OTHER PARTY FOR ANY REPAIRS BY THAT ENTITY.
Regarding the Power Supply Fuse
CAUTION: The product under service may employ the use of a
replaceable fuse. Danger of fire or electrocution if fuse is
incorrectly replaced. Replace with only the same type or
equivalent type recommended by the equipment manufacturer.
Regarding the Internal Battery
CAUTION: The product under service may employ the use of a
internal battery. Danger of explosion if battery is incorrectly
replaced. Replace only with the same or equivalent type
recommended by the manufacturer. Dispose of used batteries
according to the manufacturer's instruction.

Confidential Alesis Service Manual 8-31-0159-A
Safety Instructions
Carefully read the applicable items of the operating instructions and these safety
suggestions before using this product. Use extra care to follow the warnings
written on the product itself and in the operating instructions. Keep the operating
instructions and safety suggestions for reference in the future.
1. Power Source. The product should only be connected to a power supply which is described
either in the operating instructions or in markings on the product.
2. Power Cord Protection. AC power supply cords should be placed such that no one is likely to
step on the cords and such that nothing will be placed on or against them.
3. Periods of Non-use. If the product is not used for any significant period of time, the product's
AC power supply cord should be unplugged from the AC outlet.
4. Foreign Objects and Liquids. Take care not to allow liquids to spill or objects to fall into any
openings of the product.
5. Water or Moisture. The product should not be used near any water or in moisture.
6. Heat. Do not place the product near heat sources such as stoves, heat registers, radiators or
other heat producing equipment.
7. Ventilation. When installing the product, make sure that the product has adequate
ventilation. Improperly ventilating the product may cause overheating, which may damage the
product.
8. Mounting. The product should only be used with a rack which the manufacturer
recommends. The combination of the product and rack should be moved carefully. Quick
movements, excessive force or uneven surfaces may overturn the combination which may
damage the product and rack combination.
9. Cleaning. The product should only be cleaned as the manufacturer recommends.
10. Service. The user should only attempt the limited service or upkeep specifically described in
the operating instructions for the user. For any other service required, the product should be
taken to an authorized service center as described in the operating instructions.
11. Damage to the Product. Qualified service personnel should service the unit in certain
situations including without limitation when:
a. Liquid has spilled or objects have fallen into the product,
b. The product is exposed to water or excessive moisture,
c. The AC power supply plug or cord is damaged,
d. The product shows an inappropriate change in performance or does not operate
normally, or
e. The enclosure of the product has been damaged.

Confidential Alesis Service Manual 8-31-0159-A
ALESIS
BassFire 60 (GB0)
Test Procedures

GBO TEST Procedures
Panel function introduces.
1. INPUT jack: connect to GUITAR output signal, mono model.
2. TUNER switches: Have three functions: program switch, bypass, mute.
Program switch: while in PLAY mode, the Program Up button increases the program number, and
the Program Down button decreases the program number.
Bypass: in which the audio signal from your guitar simply passes through the Bassfire without being
affected.
Mute: when the both buttons are holding down longer than half a second, the Bassfire goes to Mute
mode, in which no signal at all leaves the amplifier.
3. Display: This LED display is made up of two digits and two decimal points. When you turn the EFFECT
knob to a module or parameter, the two digits display the setting of the selection. Turn on Bassfire after one
second, the two digits display ”8 8” and then display what status you are in.
4. EFFECT Knob: 1) PLAY functions, 2) EFFECTS setting (COMP/LIMIT~ROUTE).
1) PLAY, it can use both VALUE knob and TUNER buttons to switch the mode (clockwise and
anti-clockwise).
2) EFFECTS setting, use VALUE knob to change the parameter. (Clockwise and counterclockwise).
4-1: PLAY
In this setting the display shows the current program number. It can store the setting and recall the pre-setting
mode. It can store up to 80 modes, it shows as:
A0~A9 B0~B9 C0~C9 D0~D9 E0~E9 F0~F0 G0~G9 H0~H0
4-2: COMP/LIMIT(Compressor/limiter)
Compression evens out the high and low volumes of sound by squeezing them into a thinner range of levels,
bring down the high levels and boosting the low ones. Limiting controls only the high levels
Performing modes: C1~C9 L1~L9
Turn off: of
4-3: DIST: Has 10 Performing modes and one off position.
Performing modes: Sc./tC./C1./C2./Jt./Fb./Sd./Gr./Sr./Sy.
Off mode: OF
DIIVE: is a parameter of DIST. It has 100 variations shows as Pd.1~99. when DIST is off, it shows “- -”.
4.4 EQ has 50 performing modes and one off mode.
Performing modes:1~50
Off mode: of
4.5NR has 100 Performing modes and one off mode.
Performing modes: 01~99
Offmode
4.6 CAB: has 3 Performing modes and one off mode.
Performing modes: C2, C2, C3
Off mode: OF
4.7 FX1: has 120 Performing modes and one off mode.
Performing modes: U0~U9 UP E0~E9
h0~h9 hp b0~b9
to~t9 tp C0~C9 CP
yo~y9 yp F0~F9 FP

S0~S9 SP L0~L9 LP
A0~A9 P0~P9 PU Pd
Off mode: OF
PARAM: This parameter modifies the operation of the effect selected for the FX1 module.
4.8 FX2: has 109 Performing modes and one off mode.
Performing modes: U0~U9 UP
h0~h9 hP
t0~t9 tP
y0~y9 yP
S0~S9 SP
A0~A9
E0~E9 EP
r0~r9Rp
n0~n9 nP
o0~o9 Op
Off mode: OF
PARAM: This parameter modifies the operation of the effect selected for the FX2 module.
4.9 FX3: has 141 Performing modes and an off mode.
Performing modes: d0~d9 dP
G0~G9 GP
t0~t9Tp
S0~S9 SP
E0.~E9.EP.
H0.~H9.HP
r0.~r9.rP.
u0.~u9.Up
A0.~A9.AP
C0.~C9.CP.
F0.~F9.FP.
L0.~L9.LP
P0.~P9.PU.Pd.
Off mode: OF
PARAM: This parameter modifies the operation of the effect selected for the FX3 module.
4.10 DIGFX: has 22 Performing modes and an off mode.
Performing modes: d0~d9 dP
b0~b9 bP
Off mode: OF
4.11 LEVE: used for output level control, it has 31 detent position, the display shows Pd0~30.
4.12 ROUTE: has7 Performing modes and 360 degree recircle adjustable range. The display shows 0~7
5. VALUE knob: is a 360 degree encoder. It is used for “functions switch”. “Volume adjust” and “store and
confirm”.
5.1 function switch: rotate the VALUE knob, the display shows the corresponding function or mode.
5.2 volume adjust: rotate the VALUE knob all the way to the left(so the indicator points to “play”), press and hold
for 1 second, the display shows a number between “0~30” then release, rotate it to the right(clockwise),

the number showed on the display will increase and the volume will increase. Vice versa.
5.3 to store a Program: in Play or Edit mode, press the VALUE knob. The display will flash the current program
number. Use the Program Up and Down buttons, VALUE knob or the optical footswitches to select the
program number where the current program will be stored. Press the VALUE knob again to store the
program in the selected place.
6 “DRIVE” knob: same functions as the DRIVE of DIST
7. BASS: used to adjust the amount of bass in the current program.
8. “TREBLE”: used to adjust the amount of treble in the current program.
9. MASTER VOLUME knob: the MASTER VOLUME knob controls the overall volume of the audio signal that
is output to the speaker, the HEADPHONES jack and the STEREO LINK OUTPUT on the rear panel.
This value is not stored with a program.
10. HEADPHONES jack: plug headphones into this jack using a standard 1/4” stereo phone plug. It is analog
stereo signal output. The internal speaker, STEREO LINK OUTPUT and SPEAKER OUTPUT are
automatically disabled when headphones are used
Rear panel
1. FOOT SWITCH jack. Connect to standard footswitches to use for incrementing and decrementing program
numbers. The footswitches work in the same way as the Program Up and Program Down buttons.
2. EXPRESSION PEDAL: connect to “EXP PEDAL” input signal. It is balanced input. Connected to B50K
potentiometer to control DSP.
3. STEREO LINK OUTPUT: is a mono analog output signal, it can use for route the right channel signal to
outside equipment
4. SPEAKER OUTPUT: Connects to an external speaker. When it is applied internal speaker will be disconnect.
5. AUX INPUT: input signal for AMP.
COMPLETED UNIT FUNCTION TEST.
Testing condition:
a. Comp/LIMIT/DIST/EQ/NR/CAB/FX1/FX2/FX3/DIGFX set on“OF”mode.
b. LEVEL set to “30”.
c. ROUTE set to “0”
d. EFFECT knob set to “PLAY” position.
e. “VALUE” set to “30”
f. “MASTER VOLUME” turn all the way to the right(clockwise) (maximum)
g. connect signal to “INPUT” jack.( 470Kohm resistor in series)
h. Signal output from “HEADPHONES” jack loaded one 32 ohm/1W resistor for each channel.
i. “DRIVE” knob set to 12 o’clock position. The display shows --
j. “BASS” knob set to 12 o’clock position. The display shows 50.
k. “TREBLE” knob set to 12 o’clock position. The display show 50.
1. Main board voltage required condition:
5V 5V±0.18V(AC input +10%)
3.3V 3.3V±0.15V(AC input +10%)
2. “EFFECT” testing
2.1 normal condition using testing: rotate the “EFFECT” knob all the way to the left, the indicator points to
“PLAY”, then adjust “VALUE” knob, verify the Performing modes and the display status corresponding.(the

details of display please refer to panel function introduction.)
2.2 “COMP/LIMIT” testing: rotate the “EFFECT” knob one click to the right(so the indicator points to
“COMP/LIMIT”, connect musical signal to unit, rotate “VALUE” knob, verify output signal changing.
2.3: “DIST” Performing mode testing: rotate the “EFFECT” knob one click to the right(so the indicator
points to “DIST”, connect musical signal to “INPUT” jack, rotate “VALUE” knob, verify output signal
changing.
2.4 “EQ” Performing mode testing: rotate the “EFFECT” knob one click to the right(so the indicator points
to “EQ”, connect musical signal to “INPUT” jack, rotate “VALUE” knob, verify output signal changing.
2.5 “NR” Performing mode testing: rotate the “EFFECT” knob one click to the right(so the indicator points
to “NR”, connect musical signal to “INPUT” jack, rotate “VALUE” knob, verify the display shows
corresponding with Performing modes.
2.6. “CAB” Performing mode testing: rotate the “EFFECT” knob one click to the right(so the indicator points
to “CAB”, connect musical signal to “INPUT” jack, rotate “VALUE” knob, verify output signal changing.
2.7.”FX1” Performing testing: rotate the “EFFECT” knob one click to the right(so the indicator points to
“FX1”, connect musical signal to “INPUT” jack, rotate “VALUE” knob, verify output signal changing.
2.8.”FX2” Performing testing: rotate the “EFFECT” knob one click to the right(so the indicator points to
“FX2”, connect musical signal to “INPUT” jack, rotate “VALUE” knob, verify output signal changing.
2.9.”FX3” Performing testing: rotate the “EFFECT” knob one click to the right(so the indicator points to
“FX3”, connect musical signal to “INPUT” jack, rotate “VALUE” knob, verify output signal changing.
2.10. “DIGFX” Performing testing: rotate the “EFFECT” knob one click to the right(so the indicator points
to “NR”, connect musical signal to “INPUT” jack, rotate “VALUE” knob, verify the display shows
corresponding with Performing modes.
2.11. “LEVEL” Performing testing: rotate the “EFFECT” knob one click to the right(so the indicator points
to “LEVEL”, connect musical signal to “INPUT” jack, clockwise rotate “VALUE” knob, output will increase,
counter clockwise rotate “VALUE” knob output will decrease.
2.12. “ROUTE” Performing testing: rotate the “EFFECT” knob one click to the right(so the indicator points
to “ROUTE”, connect musical signal to “INPUT” jack, rotate “VALUE” knob, verify the display shows
corresponding with Performing modes.
3. store and power lost protection:
set “EFFECT” knob to “COMP/LIMIT” position. Rotate “VALUE” knob until the display shows “C1”, press
“VALUE” knob, display flashes. Rotate “VALUE” knob, make it display “A0”, press “VALUE” knob again.
After above procedures was done. Set “EFFECT” knob to “PLAY” “A0” status, turn off power, after 3 seconds
later, turn on the unit. The display shows “A0”, rotate “EFFECT” knob to “COMP/LIMIT” position, the display
shows “C1”.
4. “DRIVE” knob testing: turn “DRIVE” knob slowly all the way to the right, verify that the display value
increase evenly to “99”.
5. “BASS” knob testing: turn “DRIVE” knob slowly all the way to the right, verify that the display value increase
evenly to “99”. When the display shows “1”, attenuate -1.8dB@120Hz. When the display shows “99”, boost
+1.8dB@120Hz.
6. “TREBLE” knob testing: turn “DRIVE” knob slowly all the way to the right, verify that the display value
increase evenly to “99”. When the display shows “1”, attenuate -2dB@2KHz. When the display shows “99”,
boost +2dB@2KHz.
7. “HEADPHONES” jack testing:
①input sensitivity: input 1KHZ/-16.5Db sine wave, left/right channel output range 36mW±2mW.

②THD+N: 1%±0.01( when THD @1% output power over36mW)
③RESIDUAL NOISE: 0.2mv±0.1mv （set to MUTE, FILTERFREQ：20KHz)
④Output Frequency Respond: 300HZ~14KHZ/-3dB
⑤Plug/unplug “HEADPHONS” no pop noise.
AMP board
note: if no special require, all testing under below condition.
A: from “AUX INPUT” RCAinput signal.
B: from “SPEAKER OUT” jack output signal, load 8ohm/100w resistor.
1. “FOOT SWITCH” jack testing:
plug in standard footswitch to “up” and “down”, verify if can function as the Program Up and Program
Down buttons.
2. “EXPRESSION INPUT” jack: Connects to a B50K potentiometer(details connection please refer to the
illustration.), set to “LEVEL” Performing mode “Pd” status. Connect musical signal to “INPUT” jack,
connect headphone to “HEADPHONES”, when clockwise rotate potentiometer to maximum, measure
potentiometer pin 1.2.3, the DC voltage should be: 1.65V, 2.04V, 2.0V, as well the volume increase; when
counterclockwise rotate potentiometer to minimum, measure potentiometer pin 1.2.3, the DC voltage should
be:1.65V, 1.65V, 2V, as well volume decrease.
3. “STERO LINK OUTPUT” jack testing.
Condition: connect signal to “INPUT” jack(series connect one 470Kohm resistor)①
②between ground and signal output parallel connect one 32ohm/1w resistor.
③input sensitivity: input 1KHZ/-16.5dB sine wave, left/right channel output rang 36mW±2mW.
④THD+N: 1%±0.01(distortion at 1%, output over 36mW)
⑤Frequency response: 300Hz~14KHz/-3Db
⑥Plug/unplug “HEADPHONS” no pop noise.
4. “SPEAKER OUT” jack testing:
Requirement: details criterion please refer to appendix. When the “SPEAKER OUT” is plugged the speaker
will mute.
SOFTWARE TESTING
Requirement:
a: "UP" and “DOWN” connect to 1/4”CK plug with normally-open switch.(connection please refer to
illustrator)
b: "EXPESSION" jack connect to 1/4”CK plug with B50K potentiometer. .(connection please refer to
illustrator)
Procedures
1. Hold down both buttons and VALUE knob, and turn
on power switch.
Verify the display shows “dd”
2. Release both buttons and VALUE knob. Verify the display shows “ES”
3. Press and release down button Verify the display shows “PL”
4.Press and release up button
5. Press and release both buttons at the same time
6. Press and release the footswitch connected to the
“UP” footswitch inputs
Verify the display shows “Pr”
Verify the display shows “Pb”
Verify the display shows “Pr”

7. Press and release the footswitch connected to the
“DOWN” footswitch inputs
8. Press and release the footswitches at the same time.
9. Press and release VALUE knob
10. Rotate VALUE knob to the right(clockwise)
11. Rotate VALUE knob to the left(counterclockwise)
12. Turn DRIVE knob slowly all the way to the right
13. Repeat step 12 for BASS and TREBLE knobs
Verify the display shows “PL”
Verify the display shows “Pb”
Verify the display shows “ES”
Verify the display shows “E” and a symbol of LED
segments rotating to the right(clockwise)
Verify the display shows “E” and a symbol of LED
segments rotating to the left(counterclockwise)
Verify the display value increases evenly to “99”
Verify the display value increases evenly to “99”
14. Rotate EFFECT knob all the way to the right, then
back to the left (so the indicator points to "PLAY").
Verify that display shows ‘S0’ and does not flicker
15.Rotate EFFECT knob one click to the right (so the
indicator points to "COMP/LIMIT").
Verify that display shows ‘S1’ and does not flicker.
16. Rotate EFFECT knob one click to the right (so the
indicator points to "DIST").
Verify that display shows ‘S2’ and does not flicker.
17. Rotate EFFECT knob one click to the right (so the
indicator points to "DRIVE")
Verify that display shows ‘S3’ and does not flicker
18. Rotate EFFECT knob one click to the right (so the
indicator points to "EQ").
Verify that display shows ‘S4’ and does not flicker
19. Rotate EFFECT knob one click to the right (so the
indicator points to "NR").
Verify that display shows ‘S5’ and does not flicker
20. Rotate EFFECT knob one click to the right (so the
indicator points to "CAB").
Verify that display shows ‘S6’ and does not flicker
21. Rotate EFFECT knob one click to the right (so the
indicator points to "FX1").
Verify that display shows ‘S7’ and does not flicker
22. Rotate EFFECT knob one click to the right (so the
indicator points to "PARAM").
Verify that display shows ‘S8’ and does not flicker
23. Rotate EFFECT knob one click to the right (so the
indicator points to "FX2").
Verify that display shows ‘S9’ and does not flicker
24. Rotate EFFECT knob one click to the right (so the
indicator points to "PARAM").
Verify that display shows ‘SA’ and does not flicker
25. Rotate EFFECT knob one click to the right (so the
indicator points to "FX3").
Verify that display shows ‘Sb’ and does not flicker
26. Rotate EFFECT knob one click to the right (so the
indicator points to "PARAM").
Verify that display shows ‘SC’ and does not flicker
27. Rotate EFFECT knob one click to the right (so the
indicator points to "DIGFX").
Verify that display shows ‘Sd’ and does not flicker
28. Rotate EFFECT knob one click to the right (so the
indicator points to "LEVEL").
Verify that display shows ‘SE’ and does not flicker.
29. Rotate EFFECT knob one click to the right (so the
indicator points to "ROUTE").
Verify that display shows ‘SF’ and does not flicker
To restore factory preset.

1. Hold down VALUE knob, and turn on power, verify that display flashes ‘AL’
2. Press and release VALUE knob, verify that ‘ AL’ flashes rapidly a few times, then continues flashing at the
previous rate.
3. Rotate EFFECT knob so that the indicator points to COMP/LIMIT, verify that display shows ‘OF’
4. Rotate EFFECT knob so that the indicator points to PLAY, verify that display shows ‘A0’.
5. DONE!

1. Unit does not fuction.
Unit not plugged in
Fuse is blown
Check DC voltage
+/-15V, 5V,3.3V
normal or not
Check the winding of
transformer short
circuit or not
Change with
proper one
Fix the voltage
problems.
Fix the voltage
problems.
DONE
Replace with proper one
Make sure the power
is plugged into a
proper AC outlet.
YES
YES
YES
NO
NO ON
NO
OK
OK
OK
Filter capacitor and/or
POWER TRANSISTOR
short circuit or not
NO
NO

2. Display normal but not audio output
Source no signal output
or cable connection failure.
Volume Pot damaged.
Speaker damaged.
Fix the problems.
DONE
Replace with proper one
Change signal source
and cables.
YES
YES
Replace with proper one
YES
Pre-AMP circuit and
self-protect component
short circiut or
disconnection.
NO
NO
NO
NO
OK OK
POWER TRANSISTOR
short circuit or
disconnection.
YES
Fix the problems.
OK
YES

3. Audio normal but not display
4. Display improperly
Connect signal to front
penal INPUT jack.
Display and relative
components damaged or
short circuit disconnection
OK
OK
OK
OK
OK
Replace with proper one
Replace with proper one
DONE
DONE
Check DC voltage
+/-15V, 5V,3.3V
normal or not
Check DC voltage
+/-15V, 5V,3.3V and
display
Change U8 on MAIN
PCB.
failure
NO
NO
OK
Fix voltage problems
replace display with
proper one
CPU and relative
component damaged.
OK
OK
YES
Only when feed signal to
rear penal AUX INPUT
jack unit will has audio
output
Fix the voltage
problems.

Confidential Alesis Service Manual 8-31-0159-A
ALESIS
BassFire 60 (GB0)
SCHEMATIC
AND
PCB
FILES

GAX_MAIN_V1.1.sch-1 - Mon Feb 28 16:17:24 2005

GAX_MAIN_V1.1.sch-2 - Mon Feb 28 16:17:26 2005