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Korg BX-3 (Gen 2) Support

Digital Korg BX-3 circa 2000This is Korg’s second generation of the dual-manual BX-3 organ. Unlike its predecessor, this BX-3 is digital and has far more capabilities. It is distinguishable from the first-generation BX-3 because its drawbars are across the top of the upper manual. This keyboard is known by several aliases, digital BX-3, BX-3 v2, and BX-3.2.

Visit our Facebook group for announcements, discussions, and more information about supporting the Korg BX-3.

We put a lot of time into creating, gathering, and organizing the information in this page. If you found any of this to be useful to you, especially if it helped you to make or save money, please  to help us continue making content like this available. We are also raising money to help us purchase the equipment we need to be able to offer parts and service for this and other products. Please visit our Electronic Hardware Purchases page for details and consider making a contribution.


Repair Services

For most repair situations, our service is a mail-in repair of one or more circuit boards inside the equipment. This is to get around the very expensive round-trip shipping that would otherwise be required. Typically, we work with your local technician. Sometimes, all your technician needs is a little direction from us. In other cases, they can remove the circuit board(s), send them to us, and replace them once they are returned from us. If you are comfortable opening up the organ, you can act as your own technician. Check out our videos to see how easy it is to send us the main board and put it back in when we return it to you. If you would like for us to service the whole organ, you will need to arrange it with one of our service technicians using the Support request form.

The following services are for individual circuit boards inside the BX-3, and include return shipping. If your organ doesn’t power on at all and has a blank display, it’s probably the power supply. Most other problems are usually in the main board. If you’re not certain what’s wrong, use the Support request form and we will help you. The most common approach is to purchase a circuit board repair service for each of the circuit boards you’d like us to repair. These services will get your circuit boards into our shop and then back to you when they are diagnosed or repaired. This includes the initial checkout, diagnostic, and report, as well as final testing of any repairs.

Once you make your service purchases, you will receive an email from Parastream with a list of items for you to ship to us, and our shipping address. Check the videos for help with disassembly and packing. When your shipping box arrives, you will receive an email with an estimated starting date for your job. Repair services are performed in the order in which your shipping box arrives.

After we receive your main board and perform the initial evaluation, you’ll receive an estimate for what we believe it will take to repair the circuit boards. We work hard to catch every problem in the estimate, and we are successful in the vast majority of cases. The main board is a very complex circuit containing six microprocessors. Becuase of this complexity, there may be other problems hiding behind what we found in the initial estimate.

The estimate is good for 30 calendar days. If you do not respond within 30 days, we will make multiple attempts to contact you through all means you disclose to us (email, phone, etc.). If we still cannot reach you after an additional 15 calendar days, we will return your circuit boards to you.

If you choose to proceed, go to our website and order the services specified in the estimate. When we receive the order and payment, we will place your repair order in the queue for repair. Once the repairs have been performed and have passed all tests, they will be carefully packed and shipped back to you. Although exceedingly rare, the post-repair testing may find additional problems that need to be addressed. This situation can go one of two ways.

  1. Hopefully, we can identify what we believe will fix the circuit boards and give you a new estimate. If you decide to proceed with another round, order the indicated services. If you decide not to invest further in the organ, we understand. We can either return your circuit boards as they are, or refund the shipping portion of your initial repair purchase to you and we retain the boards.
  2. Although this has never happened so far, we could find a problem so severe that it becomes impossible for us to do a proper repair. In this case, we can either return your circuit boards as they are, or refund the shipping portion of your initial repair purchase and we retain the boards. We would prefer to keep our perfect repair record if it is at all possible!

If you are purchasing parts or other items along with repair services, they will be shipped in the same box with the circuit boards when the repair services are complete. This is done to minimize shipping charges. If you would like the parts to be shipped to you separately, place them on a separate order.

Services

KLM-2168 (Main Board)

Begin by purchasing the Korg KLM-2168 Circuit Board Repair. This gets your main board into our shop and then back to you when it is repaired. This includes the initial checkout and report, as well as final testing of any repairs.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Korg KLM-2168 Circuit Board Repair Service07-01000300Available$57.50

You may add additional services listed below, or you may order them later as instructed by our repair technician.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Korg KLM-2168 Circuit Board Hardware Upgrade to V2 Service07-01000600Available$22.97
Korg KLM-2168 Circuit Board TG DSP (DSPB56362 × 2) Replacement Service07-01000800Available$192.70
Korg KLM-2168 Circuit Board MIDI I/O Replacement Service07-01001100Available$38.31
Korg KLM-2168 Circuit Board Phone Jack Replacement Service07-01001200Available$73.28
Korg KLM-2168 Circuit Board Main CPU Replacement Service07-01001800Available$109.50
Korg KLM-2168 Circuit Board Sub CPU Replacement Service07-01001900Available$109.50
DescriptionPart NumberAvailabilityUnit Price (USD)QuantityOrdering
Korg KLM-2168 Circuit Board EFX DSP (TMS57070FFT) Replacement Service07-01000900Available$205.00
Korg KLM-2168 Circuit Board EFX DSP DRAM Replacement Service07-01001000Available$48.00
¼ Hour Additional Tier 3 Labor07-99000200Available$21.25

After we receive your main board and perform the initial evaluation, you’ll receive an estimate for any additional items needed for repair. In most cases, the estimate will be one or more of the additional services listed above; otherwise, it will be a fixed cost for parts and labor. We work hard to catch every problem in the estimate, and we are successful in the vast majority of cases. Due to the complex nature of the circuitry in the organ, there may be other problems hiding behind what we found in the initial estimate.

IMPORTANT: Please read the Repair Services section above and make sure you fully understand show the repair services work before placing an order. If you have any questions, use the Support request form and we will do our best to answer them.

FAQ

Will my saved programs get wiped out?
You should assume so. We will set the repaired main board to factory settings when the repairs require it. You should document any programs you want to save before sending us your main board.

KLM-2090 (Power Supply)

Begin by purchasing the Korg KLM-2090 Circuit Board Repair. This gets your power supply into our shop and back to you when it is repaired. This includes the initial checkout and report, as well as final testing of any repairs.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Korg KLM-2090 Circuit Board Repair Service07-01000000Available$31.25

You may add additional services listed below, or you may order them later as instructed by our repair technician.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Korg KLM-2090 Circuit Board Electrolytic Capacitor Replacement Service07-01000200Available$55.81
DescriptionPart NumberAvailabilityUnit Price (USD)QuantityOrdering
¼ Hour Additional Tier 3 Labor07-99000200Available$21.25

We do not recommend purchasing the Korg KLM-2090 Circuit Board Electrolytic Capacitor Replacement unless you know there is a problem with one or more of the electrolytic capacitors. The KLM-2090 is built with long life capacitors, rated from 3,000 to 6,000 hours at 105°C. For the layperson, this translates to 60 to 120 years at 8 hours a day at temperatures under 45°C (113°F). Frankly, other components are likely to fail first. Aside from failures or storage of the organ for prolonged periods at high temperatures, these capacitors should not wear out.

After we receive your power supply and perform the initial evaluation, you’ll receive an estimate for any additional items needed for repair.

IMPORTANT: Please read the Repair Services section above and make sure you fully understand show the repair services work before placing an order. If you have any questions, use the Support request form and we will do our best to answer them.

KLM-2169 (Center Top Panel)

Replaces all the tact switches around the display. This gets your center top panel board into our shop and then back to you when it is repaired.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Korg KLM-2169 Circuit Board Tact Switch Replacement Service07-01001300Available$36.07

KLM-2170 and KLM-2171 (Right and Left Top Panels)

Replaces the tact switches around the Vibrato/Chorus and Percussion areas. This gets your right and left top panel boards into our shop and then back to you when they are repaired.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Korg KLM-2170/2171 Circuit Board Tact Switch Replacement Service07-01001400Available$24.03

KLM-2310 and KLM-2311 (Left Upper and Lower Panels)

Replaces all the tact switches left of the upper and lower manuals. This gets your left upper and lower panel boards into our shop and then back to you when they are repaired.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Korg KLM-2310/2311 Circuit Board Tact Switch Replacement Service07-01001600Available$31.53

Display Module

Replaces the fuse on the display module. This is the only repair we can do on the vacuum fluorescent display module. This gets your display module into our shop and then back to you when it is repaired.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Korg BX-3/CX-3 Fluorescent Display Module Fuse Replacement07-01002000Available$18.75

Services not described here may be available on an add-on or time and materials basis. Use the Support request form to inquire.


Parts

You may purchase many replacement parts for your BX-3. At this time, we do not have mechanical parts such as knobs and keys.

KLM-2090 (Power Supply) Electrolytic Capacitor Kit

This kit contains all 8 aluminum electrolytic capacitors for the power supply. The kit comes with a color-coded circuit board layout and color-coded bags of capacitors. If you’re an average electronics DYIer, you can install this kit. Every capacitor meets or exceeds the original factory specifications.

We do not recommend replacing the KLM-2090 electrolytic capacitors unless you know there is a problem with one or more of them. The KLM-2090 is built with long life capacitors, rated from 3,000 to 6,000 hours at 105°C. For the layperson, this translates to 60 to 120 years running 8 hours a day at temperatures under 45°C (113°F). Frankly, other components are likely to fail first. Aside from failures or storage of the organ for prolonged periods at high temperatures, these capacitors should not wear out.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Electrolytic Capacitor Kit, Korg KLM-2090 Circuit Board92-9000150010 day lead time$41.00

KLM-2168 Phone Jack Kit

Contains five replacement ¼" (6.35mm) jacks for the KLM-2168 board. If you’re an average electronics DYIer, you can install this kit. Here’s an interesting piece of trivia about these jacks – in 2016, the manufacturer switched from silver plating to tin plating to reduce costs. By the way, manufacturers of similar products had already done this. The silver oxidation is probably why so many phone jacks look so bad. We recommend replacing the jacks as a last resort after all other rehabilitation efforts such as cleaning have failed.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Phone Jack Kit, Korg KLM-2168 Circuit Board92-90001700In stock$23.00

Korg Digital BX-3/CX-3 Tact Switch Kit

If some of the button switches operate erratically or not at all, you can replace them with this kit which contains 34 brand new tact switches for the BX-3. Our tact switches are rated at 10 times the number of operations as the originals. If you’re an average electronics DYIer, you can install this kit. This kit contains one extra tact switch because the BX-3 only uses 33 of them.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Tact Switch Kit, Korg BX-3/CX-3, Gen 292-9000180010 day lead time$18.00

Korg BX-3/CX-3 Firmware Flash Chips

Contains two flash chips programmed with the latest available firmware from Korg. When you place an order, the chips are dried per J-STD-033B to avoid moisture-related failures during reflow and then programmed to maximize their data retention. This is an advanced skill level job, requiring desoldering and replacing two 44-pin SOIC parts. When we perform this repair, we use a SOIC-44 hot air station nozzle.

DescriptionPart NumberAvailabilityUnit Price (USD)Ordering
Firmware Kit, Korg KLM-2168 Circuit Board92-9000190010 day lead time$52.00

Miscellaneous Repair Parts

Many repair parts that are unusual or hard to find are listed here. If you can’t find what you need, ask us!

DescriptionPart NumberAvailabilityUnit Price (USD)QuantityOrdering
Capacitor, 10µF ±20%, 25V, Aluminum Electrolytic, General Purpose, SMD, Extended Life32-1002287410 day lead time$1.50
Transistor, Bipolar PNP, 2SA812 M5, SOT (Small-Outline Transistor Package)34-0108123010 day lead time$1.50
IC, 74HCU04, Hex Inverter, SOP (EIAJ Type II, 1.27mm Pitch, 5.3mm Wide)36-133004151 in stock, more in 10 days$3.37
IC, 74HC05, Hex Inverter with Open-Drain Outputs, SOP (EIAJ Type II, 1.27mm Pitch, 5.3mm Wide)36-280005151 in stock, more in 10 days$3.39
IC, 74HC4040, 12-Stage Binary Ripple Counter, SOP (EIAJ Type II, 1.27mm Pitch, 5.3mm Wide)36-281040151 in stock, more in 10 days$4.01
IC, 74HC4052, Dual 4-Channel Analog Multiplexer/Demultiplexer, SOP (EIAJ Type II, 1.27mm Pitch, 5.3mm Wide)36-281052151 in stock, more in 10 days$3.60
IC, 29EE010-90, 5V 1Mbit (128K×8) Page-Write EEPROM PLCC-3237-2930100930 day lead time$12.00
IC, Em614163A-50, 256K x 16 High Speed EDO DRAM, SOJ-4037-61416350In stock$6.00
IC, M5216, Dual Large-Current Operational Amplifiers, SOIC (4.4mm to 5.0mm Wide)38-2052162110 day lead time$2.50
IC, M5218, Dual Low-Noise Operational Amplifiers, SOIC (4.4mm to 5.0mm Wide)38-20521821In stock$1.50
IC, Motorola DSPB56362AG120, General Purpose 24-bit fixed-point DSP (New Old Stock)39-05056362In stock$62.22
IC, Texas Instruments TMS57070FFT DSP, QFP-100 (New Old Stock)39-0605707030 day lead time$156.00
IC, Burr-Brown PC1716E, SoundPlus 24-Bit 96kHz Sampling CMOS Delta-Sigma Digital/Analog Converter, SSOP-28 (New Old Stock)39-10001716In stock$10.50
IC, Hitachi H8S/2352 / HD6412352F20 16-Bit µP, 2-20MHz, 8K RAM, QFP-128 (New Old Stock)39-110235201 in stock, more in 30 days$84.00
Fuse, 750 mA, 125VAC Ceramic Fast Blow 2410 SMD52-75030109In stock$1.50

All the above parts are for the KLM-2168 (main board) except the fuse, which is for the vacuum fluorescent display board.


Videos

  • s01e001: How to remove the power supply from a Korg CX-3 Gen 2 (the process is very similar on a BX-3 Gen 2)
  • s01e002: How to remove the main board from a Korg CX-3 Gen 2 (the process is very similar on a BX-3 Gen 2)
  • s01e004: How to replace the power supply from a Korg CX 3 Gen 2 (the process is very similar on a BX-3 Gen 2)
  • s01e005: How to replace the main board from a Korg CX-3 Gen 2 (the process is very similar on a BX-3 Gen 2)

Check out our YouTube channel for more videos!


DYI Resources

We put a lot of time into creating, gathering, and organizing the information in this page. If you found any of this to be useful to you, especially if it helped you to make or save money, please  to help us continue making content like this available. We are also raising money to help us purchase the equipment we need to be able to offer parts and service for this and other products. Please visit our Electronic Hardware Purchases page for details and consider making a contribution.

DYI Repairs

If you have good soldering and desoldering tools and skills, you may want to consider doing some repairs yourself and save labor cost and time.

Replacing Tact Switches

Are some of the panel buttons not working reliably? Do you have to press them repeatedly to get them to work? You might want to consider replacing the tact switches. There are 33 of them in the BX-3. These tact switches are susceptible to dust, smoke, and other contaminants. You may purchase a kit of these tact switches from us here, or from another supplier. Our tact switches are rated at 10 times the number of press and release cycles as the originals.

All the tact switches are through-hole mounted on one-sided printed circuit boards. The only trick with installing the new ones is to make sure they are soldered completely flush to the circuit board. You may find some helpful videos here.

While this will take a while to disassemble the organ, replace the switches, and reassemble the organ, it will make it operate like new. To prolong the life of your new switches, we recommend keeping the organ under a dust cover when not in use.

Replacing Phone Jacks

The ¼-inch phone jacks can get corroded or worn out. If you are experiencing scratchy or intermittent operation plugging in cords into the phone jacks, try cleaning them with DeoxIt first. DO NOT Spray directly into the jacks! Instead, saturate a swab and insert it into the jack. Move the swab in and out a few times and try to reach toward the top of the jacks where the contacts are. If this does not fix the problem, the jacks must be replaced.

You may purchase the jacks from us here, or from another supplier. This operation will require a slightly higher skill level than replacing the tact switches, as the printed circuit board is two-sided. You may find some helpful videos here.

Replacing the Firmware Chips

While this is not a common repair, replacing the firmware chips may be necessary if you have determined that the firmware has degraded due to “bit rot” or other problems preventing the organ from booting.

You may purchase the set of firmware chips from us here. The firmware chips are programmed after you order them and have not been sitting on a shelf for years. You should bake the chips for 24 hours at 125°C per J-STD-033B to avoid moisture-related failures during reflow. This is an advanced skill level job, requiring desoldering and replacing two 44-pin SOIC parts. When we perform this repair, we use a special nozzle for SOIC-44 with our hot air station to remove the old chips.

Advanced DYI Repairs

For more advanced troubleshooting, visit our Advanced Troubleshooting page (this link will take you to a publicly-shared document on a Google Drive).

Manuals

IC Datasheets

General Information

You may access useful information for debugging and determining what version of the firmware your organ has. Refer to the following table as a guide, and hold down the indicated buttons while switching on the power. Be patient. You have to hold the buttons down until the desired information displays.

PROGRAM 1 and PROGRAM 8
Displays the low-level firmware version. It is normally displays Ipl V2.00   000422AB
PROGRAM 2 and PROGRAM 7
Perform a factory reset. Displays Load Factory Data?  , Press the WRITE/ENTER button to completely refresh the unit to factory condition.
PROGRAM 4 and PROGRAM 6
Enter the Test Mode. See Test Mode for details.
DISPLAY
Displays the master and subsystem CPU firmware version. The last versions are Main 2.01 Sub 1.00  .

Test Mode

The test mode begins by testing the internal components of the organ, and then moving into interactive tests of the keys, buttons, and lights. If you have a MIDI cable, connect it from the IN jack to the OUT jack for the MIDI loop test. If you don’t have a cable, you can skip the test when it reports an error.

During test mode, use the following percussion buttons to navigate:

ON Go to the previous item marked with a ✔.
SOFT Go to the next item marked with a ✔.
FAST Go to the previous step.
3rd Go to the next step, or skip an internal test error

The following table shows the test steps.

Item Display Description
  Main 2.01 Sub 1.00 The main and sub-MPU versions.
Main RAM Test Tests the RAM in the main MPU. Main RAM Test Error  indicates a failure.
  Main ROM Test Tests the firmware in the main MPU (IC18). Main ROM Test Error indicates a failure.
  Flash ROM Test Checks the integrity of the setting in the user flash chip (IC22).
  FPS Com Test Tests the serial communications lines between the main board and the front panel MPU.
Sub Code Test Tests the firmware in the sub-MPU (IC6). Sub Code Test Error  indicates a failure.
Sub RAM Test Tests the DRAM used by the FX DSPs (IC24, IC25). Sub RAM Test  Error  indicates a failure.
DSP Test Preliminary tests for the four DSP chips.
  DSP1 Test Tests the first TG DSP (IC8). DSP1 Test Error      indicates a failure. If IC7 is a 1J21D mask chip, it is recommended to replace it as well because of the history of failure with these chips.
  DSP2 Test Tests the second TG DSP (IC7). DSP2 Test Error      indicates a failure. If IC8 is a 1J21D mask chip, it is recommended to replace it as well because of the history of failure with these chips.
  DSP3 Test Tests the first FX DSP (IC19). DSP3 Test Error      indicates a failure.
  DSP4 Test Tests the second FX DSP (IC20). DSP4 Test Error      indicates a failure.
MIDI Loop Test Tests the MIDI IN and OUT loop-back. Displays MIDI Loop Error      and pauses if there is no MIDI cable between the MIDI IN and OUT jacks, or if there is actually an error. Press SOFT to advance from pause. There is no way to test MIDI THRU.
Switch LED Test Press 3rd to begin switch tests or SOFT to skip. During switch testing, the organ will emit a short tone if the incorrect key is pressed.
████████████████████ Illuminates all display character pixels for examination. In older organs, you may see some burn-in. Press 3rd or SOFT to advance.
    Darkens all display character pixels for examination. Press 3rd to advance.
ExpressTurnRight   0 Turn the EXPRESSION / OVERDRIVE knob full counterclockwise. The displayed value should be 0. Turn the knob full clockwise. The displayed value should increment toward 127. Advances to the next step when turned full clockwise.
  ExpressTurn Left 127 Turn the EXPRESSION / OVERDRIVE knob full counterclockwise. The displayed value should decrement toward 0. Advances to the next step when turned full counterclockwise.
  Treble TurnRight   0 Turn the TREBLE knob full counterclockwise. The displayed value should be 0. Turn the knob clockwise to the center detent. The displayed value should be 64. Turn the knob full clockwise. The displayed value should increment toward 127. Advances to the next step when turned full clockwise.
  Treble Turn Left 127 Turn the TREBLE knob full counterclockwise. The displayed value should decrement toward 0. Advances to the next step when turned full clockwise.
  Bass   TurnRight   0 Turn the BASS knob from full counterclockwise. The displayed value should be 0. Turn the knob clockwise to the center detent. The displayed value should be 64. Turn the knob full clockwise. The displayed value should increment toward 127. Advances to the next step when turned full clockwise.
  Bass   Turn Left 127 Turn the BASS knob full counterclockwise. The displayed value should decrement toward 0. Advances to the next step when turned full clockwise.
  Reverb TurnRight   0 Turn the REVERB OFFSET knob full counterclockwise. The displayed value should be 0. Turn the knob clockwise to the center detent. The displayed value should be 64. Turn the knob full clockwise. The displayed value should increment toward 127. Advances to the next step when turned full clockwise.
  Reverb Turn Left 127 Turn the REVERB OFFSET knob full counterclockwise. The displayed value should decrement toward 0. Advances to the next step when turned full clockwise.
█        <> Drawbar test. For each drawbar from left to right, push it all the way in, then slowly all the way out, while observing the animated display. The animated drawbar should accurately show the drawbar position. Push the drawbar all the way in to advance to the next drawbar.
Encoder Test The display prompt to begin testing the VIBRATO / CHORUS knob. Press 3rd to begin the tests or SOFT to skip.
  Encoder  Turn the knob and observe that the display value ranges from -128 to 127. Press 3rd to advance.
  Encoder Right   0 Turn the knob exactly one revolution clockwise. The display should range from 0 to 15 with a < displayed in the rightmost character position. Press 3rd to advance.
  Encoder Left    0 Turn the knob exactly one revolution counterclockwise. The display should range from 0 to -15 with a < displayed in the rightmost character position. Press 3rd to advance.
Pedal1 Test Setup: Plug a foot switch into PEDAL 1 jack. Plug a generic expression pedal into the PEDAL 2 jack. Plug in a Korg BX-3 expression or equivalent such as a FC7 Volume Pedal into the EXPRESSION PEDAL jack. Press FAST if the display has advanced to Pedal Test 2.

Run through the 6 tests in this item. At the end when the Keyboard Test message is displayed, plug the three cables back into the jacks, but swap PEDAL 1 and PEDAL 2. This will verify that both ASSIGNABLE PEDAL inputs can take an expression or volume pedal, and a foot switch.

Press and hold the switch and observe the value is 127. Release the switch and observe the display has advanced to the next step.
  Pedal2 Test Move the generic expression pedal to its lowest volume position. Rock it forward and then back all the way. Observe the display value is 0. Move the pedal to the loudest position and observe the display is 127. Move it to the lowest volume position to advance to the next step.
  Pedal3 Test Move the expression pedal to its lowest volume position. Rock it forward and then back all the way. Observe the display value is 0. Move the pedal to the loudest position and observe the display is 127. Move it to the lowest volume position to advance to the next step.
  Remove Pedal1 Unplug the cord in the PEDAL 1 jack and observe the display has advanced to the next step.
  Remove Pedal2 Unplug the cord in the PEDAL 2 jack and observe the display has advanced to the next step.
  Remove Pedal3 Unplug the cord in the EXPRESSION PEDAL jack and observe the display has advanced to the next step.
Kbd Up  C7 / C7   7F Press each playing key on the upper manual as indicated by the display. You will have to strike the key with some force to advance to the next key.
  Kbd Lo  C7 / C7   7F Press each playing key on the lower manual as indicated by the display. You will have to strike the key with some force to advance to the next key.
Output Level Test1 1 kHz in the left channel, 415 Hz in the right at 0 dB.
  Output Level Test2 490 Hz in the left channel, 1 kHz in the right at 0 dB.
  Output Level Test3 1 kHz in the left channel, 612 Hz in the right at -6 dB.
  Output Level Test4 550 Hz in the left channel, 1 kHz in the right at -6 dB.
Noise Test 1 ?
  Noise Test 2 ?
  Noise Test 3 ?
  Noise Test 4 ?
Pre Load This is the last prompt of test mode.

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