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Service Manual
DIGITAL MULTITRACKER
CAUTION:
CAUTION TO PREVENT ELECTRIC SHOCK, MATCH WIDE
RISK OF ELECTRIC SHOCK BLADE OF PLUG TO WIDE SLOT, FULLY INSERT.
DO NOT OPEN
ATTENTION:
POUR EVITER LES CHOCS ELECTRIQUES,
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, INTRODUIRE LA LAME LA PLUS LARGE DE LA
DO NOT REMOVE COVER (OR BACK). FICHE DANS LA BORNE CORRESPONDANTE DE
LA PRISE ET POUSSER JUSQU AU FOND.
NO USER - SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. The lighting flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated "dangerous voltage" within the
product's enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
"WARNING" The exclamation point within an equilateral triangle is
"TO REDUCE THE RISK OF FIRE OR ELECTRIC intended to alert the user to the presence of important
SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN operating and maintenance (servicing) instructions in the
OR MOISTURE." literature accompanying the appliance.
SAFETY INSTRUCTIONS
1. Read Instructions - All the safety and operating or pinched by items placed upon or against them,
instructions should be read before the appliance is paying particular attention to cords at plugs,
operated. convenience receptacles, and the point where they exit
2. Retain Instructions - The safety and operating from the appliance.
instructions should be retained for future reference. 13. Cleaning - The appliance should be cleaned only as
3. Heed Warnings - All warnings on the appliance and recommended by the manufacturer.
in the operating instructions should be adhered to. 14. Nonuse Periods - The power cord of the appliance
4. Follow Instructions - All operating and use should be unplugged from the outlet when left unused
instructions should be followed. for a long period of time.
5. Water and Moisture - The appliance should not be 15. Object and Liquid Entry - Care should be taken so that
used near water - for example, near a bathtub, objects do not fall and liquids are not spilled into the
washbowl, kitchen sink, laundry tub, in a wet enclosure through openings.
basement, or near a swimming pool, and the like. 16. Damage Requiring Service - The appliance should be
6. Carts and Stands - The appliance should be used serviced by qualified service personnel when:
only with a cart or stand that is recommended by the A. The power supply cord or the plug has been damaged; or
manufacturer. B. Objects have fallen, or liquid has been spilled into the
appliance;
or
C. The appliance has been exposed to rain; or
D. The appliance does not appear to operate normally or
exhibits a marked change in performance; or
E. The appliance has been dropped, or the enclosure damaged.
An appliance and cart combination should be moved 17. Servicing - The user should not attempt to service
with care. Quick stops, excessive force, and uneven the appliance beyond that described in the operating
surfaces may cause the appliance and cart combination instructions. All other servicing should be referred to
to overturn. qualified service personnel.
7. Wall or Ceiling Mounting - The appliance should be 18. The appliance should be situated away from drops
mounted to a wall or ceiling only as recommended by of water or spray of water.
the manufacturer. 19. Objects containing liquid such as vase must not be
8. Ventilation - The appliance should be situated so that put on the appliance.
its location or position does not interfere with its The appliance is not completely isolated from the
proper ventilation. For example, the appliance should 20. power supply even if the power switch is at off
not be situated on a bed, sofa, rug, or similar surface position.
that may block the ventilation openings; or, place in a 21. Apparatus shall not be exposed to dripping or
built-in installation, such as a bookcase or cabinet splashing and no objects filled with liquids, such as
that may impede the flow of air through the vases, shall be placed on the apparatus.
ventilation openings. 22. Only use attachments/accessories specified by the
9. Heat - The appliance should be situated away from manufacturer.
heat sources such as radiators, heat registers, 23. An appliance with a protective earth terminal should
stoves, or other appliances (including amplifiers) that be connected to mains outlet with a protective earth
produce heat. connection.
10. Power Sources - The appliance should be connected 24. An appliance should be placed in a position where
to a power supply only of the type described in the an AC plug / inlet can be easily pulled out by hand.
operating instructions or as marked on the appliance. 25. Main plug is used as the disconnection device. It
11. Grounding or Polarization - The precautions that shall remain readily operable and should not be
should be taken so that the grounding or polarization obstructed during intended use. To be completely
means of an appliance is not defeated. disconnected the apparatus from supply mains, the
12. Power Cord Protection - Power supply cords should main plug of the apparatus shall be disconnected
be routed so that they are not likely to be walked on from the mains socket outlet completely.
& Service Manual
TABLE OF CONTENTS
1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. CONTROLS, INDICATORS & CONNECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. SOFTWARE UPDATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. SERVICE MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5. MR16HD & MR16HD/CD PCB CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6. EXPLODED VIEW, PCB ASSEMBLY & PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7. CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8. ERROR CODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
NOTES
* PCB assembly, parts list and circuit diagrams are given in this manual to assist the service technician in
maintaining the Model MR16HD MR16HD/CD. To make it simple, MR16HD and MR16HD/CD are
just descried as "MR16" hereafter in this manual. If a distinction is required between the two, the model
number "MR16HD" and "MR16HD/CD" are described.
* The following accessories are supplied with MR-16HD, MR-16HD/CD as the standard accessories.
Owner's manual, MR-16HD, ENG : 8588088000 (452186)
Owner's manual, MR-16HD, JPN : 8588089000 (452188)
Owner's manual supplement, MR-16HD, ENG : 8588093000 (456636)
Owner's manual supplement, MR-16HD/CD, ENG : 8588095000 (456638)
Owner's manual supplement, MR-16HD, JPN : 8588094000 (456637)
Owner's manual supplement, MR-16HD/CD, JPN : 8588096000 (456639)
* The following is the packing material for MR-16HD/CD.
Carton, inner, MR-16HD : 8528101000 (452153)
Poly, Form, L, MR-16HD : 8528099000 (452151)
Poly, Form, R, MR-16HD : 8528100000 (452152)
CAUTION
Parts marked with this sign are safety critical components. They must always be replaced with identical
components. Refer to the Fostex Parts List and ensure exact replacement.
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1. SPECIFICATIONS
SPECIFICATION UNIT 0 dBV = 1.0 Vrms, 0 dBu = 0.775 Vrms
REFERENCE LEVEL 12 dB below full scale level
< INPUT & OUTPUT >
ANALOG IN (A ~ D)
Connector XLR-3-31 type (Pin-1: GND, Pin-2: Hot, Pin-3: COLD) / Ø 6 mm TRS
phone balanced (Inserting TRS phone jack breaks signal fed to XLR
connector.)
Input Level - 48 dBu (MIC) ~ + 4 dBu (LINE)
Input Impedance 1.5 k or more
400 k or more (INPUT SW: GTR)
Reference Input Level
LINE + 4 dBu
MIC - 48 dBu
Phantom - 48 V, On/Off switchable by MENU setting. Fed to XLR connector
only.
INSERT (A)
Connector Ø 6 mm TRS phone (Tip: output, Ring: Input, Sleeve: GND)
Load Impedance 10 k or more
Reference Output Level - 10 dBV
Input Impedance 10 k or more
Reference Input Level - 10 dBV
STEREO OUT (L, R)
Connector Ø 6 mm phone
Reference Output Level - 10 dBV (Unbalanced)
Load Impedance 10 k or more
AUX OUT (x 2)
Connector Ø 6 mm phone
Reference Output Level - 10 dBV (Unbalanced)
Load Impedance 10 k or more
PHONES (x 2)
Connector Ø 6 mm STEREO phone
Load Impedance 16 or more
Maximum Output Level 50 mW or more at 32
MIDI OUT
Connector DIN 5-pin
Format MIDI Standard
FOOT SW
Connector Ø 6 mm phone
ON/OFF Level TTL Level
Type Unlatched type
S/P DIF OUT
Connector Optical
Format IEC60958 (S/P DIF)
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USB
Device USB 1.1. USB logo certificate not acquired. Connecting a USB key
board and a storage device for file transfer is possible.
Connector A type
2 1 1 VBUS
2 D-
DATA
3 D+
3 4 4 GND
USB
Device USB 2.0 high speed. USB logo certificate not acquired. File transfer be
tween PC and MR16 is possible.
Format B type
1 VBUS
2 D-
DATA
1 2 3 4 3 D+
4 GND
< MAJOR SPECS. >
Record & Playback
Medium Internal 3.5" HD
Sampling Frequency 44.1 kHz
Resolution 16 bits linear
File System FAT-32
Number of Track 16
A/D & D/A Converter
A/D 24 bits delta-sigma, Cirrus Logic CS5331
D/A 24 bits delta-sigma, Cirrus Logic CS4345
Fader 256 steps, 30 mm
CD-R/RW Drive Accession No. 0221205
< CHARACTERISTICS >
Maximum Output Level
ST OUT + 2 dBV ± 1 dB (full scale level)
AUX OUT + 2 dBV ± 1 dB (full scale level)
PHONES 50 mW or more (32 load, 1 kHz)
Reference Output Level
ST OUT - 10 dBV ± 4 dB (Fader fixed at standard position (0 dB), 1 kHz)
AUX OUT - 10 dBV ± 4 dB (Fader fixed at standard position (0 dB), 1 kHz)
Frequency Response
ST OUT 20 Hz ~ 20 kHz + 2 dB, - 3 dB (MIC/LINE)
AUX OUT 20 Hz ~ 20 kHz + 2 dB, - 3 dB (MIC/LINE)
PHONES 50 Hz ~ 15 kHz + 2 dB, - 3 dB (50 mW, 32 load)
T.H.D.
MIC -> ST OUT 0.1 % or less (Full scale level - 2 dB, 1 kHz)
LINE -> ST OUT 0.1 % or less (Full scale level - 2 dB, 1 kHz)
LINE -> PHONES 0.1 % or less (50 mW, 32 load, 1 kHz)
Dynamic Range 89 dB or more
S/N
LINE 89 dB or more (IHF A, input terminated by 150 resistor.)
MIC 80 dB or more (IHF A, input terminated by 150 resistor.)
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Residual Noise
LINE - 87 dBV or less (DIN, input terminated by 150 resistor.)
MIC - 78 dBV or less (DIN, input terminated by 150 resistor.)
PHONES - 85 dBV or less (DIN)
Crosstalk 65 dB or more (1 kHz)
LINE (TRIM : MIN) 85 dB or more (1 kHz, full scale level is input to adjacent channel.)
MIC (TRIM : MAX) 75 dB or more (1 kHz, full scale level is input to adjacent channel.)
Click Noise
Power On/Off - 20 dBVp-p or less (ST OUT)
Others - 30 dBVp-p or less (ST OUT)
Phantom
Voltage + 48 ± 2 V, On/Off on all channels at once by MENU setting.
< OTHERS >
Dimensions 400 (W) x 85 (H) x 265 (D) mm (including protruding portion)
Weight 3.3 kg
Power
JPN 100 V AC
USA 120 V AC
EUR/UK 230 V AC
Power Consumption 14 W
Usage Condition Horizontal, continuous operation
Environmental Condition
Standard Temperature 20 ± 2 °C
Standard humidity 65 ± 5 %
Characteristics Guaranteed
Temperature + 5 °C ~ + 40 °C
Humidity 30 % ~ 70 %
Voltage deviation ± 5 % or less
Operation Guaranteed
Temperature + 5 °C ~ + 45 °C
Humidity 85 % or less
Voltage deviation ± 10 % or less
< STANDARDS >
Vibration & Drop Tests Comply to Fostex Company technical standards
Safety Standard IEC60065
Others
EMI EN55011 Group 1 Class B
EN61000-3-2 & 3-3
EMS EN61000-6-1 (Year 2001 version)
Environment Response RoHS compliance
Specifications and physical appearance are subject to change without notice for product improvement.
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2. CONTROLS, INDICATORS & CONNECTORS
< Top Panel Section 1 >
1 2 34 5 6 7 8
INPUT A INPUT B INPUT C INPUT D L STEREO OUT R
BAL BAL BAL BAL
1 AUX OUT 2
UNBAL POWER
/GUITAR INSERT UNBAL UNBAL UNBAL
1 PHONES 2
9
20 DISTORTION
TRIM
PEAK
TRIM
PEAK
TRIM
PEAK
TRIM
PEAK VOLUME
19
MIN MAX LINE MIC LINE MIC LINE MIC LINE MIC MIN MAX
GUITAR
18 INPUT A INPUT B INPUT C INPUT D 10
TO STEREO BUSS LEVEL
17 MIN MAX
ROOM HALL PLATE DELAY BOUNCE MODE 15/16 > STEREO WAV FILE
INPUT EQ EFFECT BOUNCE MENU / ENTER
16
MIN MAX
REVERB / DELAY TIME
POWERFUL NATURAL BRIGHT TIMEBASE SELECT STORE UNDO/REDO
MASTERING
MIC AMP EFFECT SEND
15 SIMULATION SIMULATION 0 10 0 10 0 10 0 10 0 10 0 10 0 10 0 10
AUTO PUNCH PLAY MODE A / IN B / OUT RHYTHM GUIDE CONTRAST DIRECT LOCATE
LOCATE
DYNAMIC BRIT STACK PAN
14
L R L R L R L R L R L R L R L R
ABC1 DEF2 GHI3 JKL4 MNO5 PQR6 STU7 VWX8 YZ9 +-_0 DELETE
REC SELECT REWIND F FWD
CONDENSER US METAL 1 2 3 4 5 6 7 8 9/10 11/12 13/14 15/16 MASTER
13
MAX MAX
LOCATE ABS ZERO LOCATE REC END
RECORD STOP PLAY
TUBE 60'S COMBO
MIN A-B PLAY
MIN
12 11
1. [INPUT A] input connectors 15. [EFFECT SEND] controls
2. [INSERT] connector 16. [INPUT EQ] keys
3. [INPUT B, C, D] input connectors 17. [TO STEREO BUSS] keys
4. [STEREO OUT] jacks [TO STEREO BUSS LEVEL] control
5. [AUX OUT] jacks 18. [PEAK] indicators
6. [PHONES] jacks 19. [DISTORTION] control
7. [PHONES VOL] control 20. [TRIM] controls
8. LCD display
9. [POWER] switch
10. [MENU/ENTER] rotary / push knob
11. [MASTER] fader
12. Track faders
13. [REC SELECT] keys
14. [PAN] controls
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< Top Panel Section 2 >
21 22
INPUT A INPUT B INPUT C INPUT D L STEREO OUT R
BAL BAL BAL BAL
1 AUX OUT 2
23
UNBAL
/GUITAR INSERT UNBAL UNBAL UNBAL
POWER 24
1 PHONES 2
25
TRIM TRIM TRIM TRIM
DISTORTION PEAK PEAK PEAK PEAK VOLUME
MIN MAX LINE MIC LINE MIC LINE MIC LINE MIC MIN MAX
GUITAR
INPUT A INPUT B INPUT C INPUT D
TO STEREO BUSS LEVEL
MIN MAX
ROOM HALL PLATE DELAY BOUNCE MODE 15/16 > STEREO WAV FILE
INPUT EQ EFFECT BOUNCE MENU / ENTER
MIN MAX
REVERB / DELAY TIME
POWERFUL NATURAL BRIGHT TIMEBASE SELECT STORE UNDO/REDO
26
MIC AMP EFFECT SEND
MASTERING
27
SIMULATION SIMULATION 0 10 0 10 0 10 0 10 0 10 0 10 0 10 0 10
AUTO PUNCH PLAY MODE A / IN B / OUT RHYTHM GUIDE CONTRAST DIRECT LOCATE 28
LOCATE
29
DYNAMIC BRIT STACK
L R L R L R L R L R L R L R L R
PAN
30
ABC1 DEF2 GHI3 JKL4 MNO5 PQR6 STU7 VWX8 YZ9 +-_0 DELETE
REC SELECT REWIND F FWD 31
CONDENSER US METAL 1 2 3 4 5 6 7 8 9/10 11/12 13/14 15/16 MASTER
MAX MAX
LOCATE ABS ZERO
RECORD STOP
LOCATE REC END
PLAY
32
TUBE 60'S COMBO
MIN A-B PLAY
MIN
37 36 35 34 33
21. [REVERB/DELAY TIME] control 31. [RHYTHM GUIDE] key
22. [EFFECT] keys 32. Transport keys
23. [BOUNCE MODE] key [PLAY] key
24. [15/16 > STEREO WAV FILE] key [STOP] key
25. [MASTERING] keys [RECORD] key
[POWERFUL] key [F FWD] key
[NATURAL] key [REWIND] key
[BRIGHT] key 33. [LOCATE B/OUT] key
26. [STORE] key 34. [LOCATE A/IN] key
27. [UNDO/REDO] key 35. [PLAY MODE] key
28. [TIME BASE SEL] key 36. [AUTO PUNCH] key
29. [DIRECT LOCATE] key 37. Insert effect selection keys
30. [CONTRAST] key
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< Rear Panel Section >
1
INPUT A SEL
GTR CLEAN MIC/LINE
GTR DIST
USB USB HOST MIDI OUT DIGITAL OUT FOOT SW
7 6 5 4 3 2
1. [INPUT A SELECT] switch
2. [FOOT SW] jack
3. [DIGITAL OUT] connector
4. [MIDI OUT] jack
5. [USB HOST] connector
6. [USB] port
7. [AC IN] conector
< Side Panel Section >
COMPACT
Ultra Speed
R O M ReWritable
1
1. Internal CD-R/RW drive
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3. SOFTWARE UPDATE
1) Connect the AC power cable to the AC IN connector.
2) Press the MR16 power switch.
3) Press the [MENU/ENTER] dial to enter the MENU mode.
4) Rotate the [MENU/ENTER] dial and select the "USB" menu.
5) Press the [MENU/ENTER] dial.
6) Rotate the [MENU/ENTER] dial and select the "Disk Protect"
menu.
7) Press the [MENU/ENTER] dial and set "Disk Protect" to "Off" by
rotating the [MENU/ENTER] dial. Then, press the [MENU/EN-
TER] dial. With this setting, the Disk Protect mode is turned off
indicating the condition that the software update file can be copied
to the MR16 internal HDD.
8) Rotate the [MENU/ENTER] dial to select the "< < Back" menu and
press the [MENU/ENTER] dial.
9) Rotate the [MENU/ENTER] dial and select the "USB Device
Mode" menu.
10) Press the [MENU/ENTER] dial. If MR16 is correctly put into the
USB mode, the display on the right will appear on the LCD. Now
MR16 is ready to connect to PC or Macintosh.
11) Connect the USB cable from the MR16 USB port to PC on which
Windows XP/2000 is running or Macintosh on which OS X is run-
ning.
CAUTION: MR16 can be connected to PC on which Windows XP/2000 is running or Macintosh on which
OS X is running for software update as well as audio data transfer. Of course PC/Macintosh
has to be equipped with a USB port.
INPUT A SEL
GTR CLEAN MIC/LINE
GTR DIST
USB USB HOST MIDI OUT DIGITAL OUT FOOT SW
USB port
USB port
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12) PC or Macintosh recognizes MR16 as an external removable disk.
(a) Windows XP/2000
The example on the right indicates that
MR16 is recognized as a removable disk
(E) in the My Computer on Windows XP
PC. Unzip the software update file with
"zip" extension (e.g. MR16_V102.zip)
normally sent together with a technical
bulletin. If you do so, a software update
file (e.g. MR16V102.MOT) will be cre-
ated. Place a newly created software up-
date file with "MOT" (motorola format)
extension in the root directory tree of the
Removable disk (E).
By double-clicking the removable drive
(E) (MR16), the window on the right will
appear. You can see that the software up-
date file (MR16V102.MOT) is placed in
the top directory tree of the Removable
Disk (E).
MR16
song folder
MR16 software
update file
Continue to the next page.
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After transferring the software update file is com-
pleted, do not tun off the USB connection by
pressing the MR16 STOP key. First, you need
to safely remove the MR16 from PC side by
opening the "Safety Removable Hardware" in
the tool bar and pressing the "Stop" button on
Windows XP/2000 PC. Then, you can turn off the
USB connection from the MR16 side.
Press this STOP butten befor turning off
the MR16 USB mode by pressing
the STOP key.
Press this OK butten befor turning off the
MR16 USB mode by pressing the OK key.
(b) Macintosh OS X
MR16 is recognized as
"MR16" on the Macintosh
OS X desktop. By double-
clicking the MR16 icon, the
window on the right will
appear. There are five song
folders and one software
update file "MR16V101. MR16 Song folder
MOT". MR16 Software
update file
Unzip the software update file with "zip"
extension (e.g. MR16_V102.zip) normally
sent together with a technical bulletin.
Copy and paste a newly created software file MR16
with "MOT" (motorola format) extension Song folder
(e.g. MR16V102.MOT) onto a root direc-
tory of MR16 HDD connected to Macintosh MR16
(OS X). Softwareupdate file
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After transferring the software update
file is completed, do not tun off the
USB connection by pressing the
MR16 STOP key. First, as shown
Press the EJECT button
before turning off the
on the right, you need to press the
MR16 USB mode by
EJECT button on Macintosh. Then,
pressing the STOP key.
you can turn off the USB connection
from the MR16 side.
CAUTION: There is a case that it takes time for PC or Macintosh to recognize MR16 as an external device.
While the "ACC" (access) indication on the upper right of the MR16 LCD is flashing in the USB
mode, do not disconnect the USB cable between MR16 and PC / Macintosh.
13) Disconnect the USB cable between MR16 and PC / Macintosh.
14) On MR16 with the normal display appears, press the [MENU/ENTER] dial while holding down the [STOP]
key to access the Service Mode menu.
INPUT A INPUT B INPUT C INPUT D L STEREO OUT R
BAL BAL BAL BAL
1 AUX OUT 2
UNBAL POWER
/GUITAR INSERT UNBAL UNBAL UNBAL
Press the
1 PHONES 2
TRIM TRIM TRIM TRIM
[MENU/ENTER] key.
DISTORTION PEAK PEAK PEAK PEAK VOLUME
MIN MAX LINE MIC LINE MIC LINE MIC LINE MIC MIN MAX
GUITAR
INPUT A INPUT B INPUT C INPUT D
TO STEREO BUSS LEVEL
MIN MAX
ROOM HALL PLATE DELAY BOUNCE MODE 15/16 > STEREO WAV FILE
INPUT EQ EFFECT BOUNCE MENU / ENTER
MIN MAX
REVERB / DELAY TIME
POWERFUL NATURAL BRIGHT TIMEBASE SELECT STORE UNDO/REDO
NOTE: Pressing the [MENU/ENTER]
MASTERING
MIC AMP
SIMULATION SIMULATION 0 10 0 10 0 10 0 10 0 10 0 10 0 10 0 10
EFFECT SEND
AUTO PUNCH PLAY MODE A / IN B / OUT RHYTHM GUIDE CONTRAST DIRECT LOCATE
dial while holding down the
LOCATE
[STOP] key allows to access
DYNAMIC BRIT STACK PAN
L R L R L R L R L R L R L R L R
ABC1 DEF2 GHI3 JKL4 MNO5 PQR6 STU7 VWX8 YZ9 +-_0 DELETE
REC SELECT REWIND F FWD
CONDENSER US METAL
MAX
1 2 3 4 5 6 7 8 9/10 11/12 13/14 15/16 MASTER
MAX
LOCATE ABS ZERO LOCATE REC END
the "Version" and "Version
RECORD STOP PLAY
TUBE 60'S COMBO
A-B
A-B PLAY
Up" Service menu only. To
MIN MIN
fully access all the Service
Hold down [STOP] key.
menus, as mentioned on page
16, press the [MENU/ENTER]
dial while holding