HX3.7 Installation Manual

HX3.7 Mainboard

Preface

HX3.7 does no longer offer "legacy" button/switch inputs (like Panel16) and classic analog drawbar inputs (old green DB9/DB12 boards). Instead, it relies on I2C bus interfaces on external panels (like Preset16, Extern16 or VibratoSwitch) and analog scanning MPX bus circuits as found on PTX, ANX, DBX9 and DBX12 drawbar boards. For existing OEM installations, we will offer an interface (LegacyBoard) providing connectors for legacy hardware (see below).

MIDI output jack may be mounted on mainboard (new hole for connector necessary) or custom JackExtension board (old location of MIDI OUT connector) alternatively. Note: JackExtension board may be customized for OEM use as it only contains passive components (jacks, optional level potentiometer).

Commissioning is carried out in the same way as for the HX3.6 board. However, note the different header designations for HX3.7. Disregard sections concerning internal analog and internal digital inputs, vibrato rotary swich, ExtensionBoard as these are not applicable to HX3.7 mainboard.

Headers/Connectors

HX3.7 Components/Connector placement (also avalable as PDF, see on our Documentation and Update Server)

HX3.7 offers a wide range of connection options for universal use. Don't let this confuse you, for basic operation it is sufficient to connect the power supply and, if necessary, the MenuPanel to PANEL I2C. Unused connections can simply be left open. Max. cable length for Fatar scan board is 50cm, for other scan boards 1.5m. Max. cable length for I2C and MPX bus including all segments is 1m. Keep cables as short as possible.

HX3.7 Mainboard connectors
PL1	External 11-pin Leslie connector (optional)
PL2	HX3.7 JackExtension Board (optional)
PL3	Stereo audio output; mid = GND
PL4	Plain organ/pedal audio output; mid = GND
PL5	1/4" jack audio output right or headphone L/R (see JP1/JP3)
PL6	Stereo headphone output; mid = GND
PL7	1/4" jack audio output left or stereo L/R (see JP1/JP3)
PL8	External EFX loop audio input; mid = GND
PL9	DC input, 5V (JP4 set) or 9..12V/500mA, plus on center
PL10	MIDI IN1 DIN connector
PL11	DSP PROG (debug, do not use)
PL12	MIDI IN/OUT for XB2 kit
PL13	FPGA JTAG (debug, do not use)
PL14	Fatar/matrix scan board (FatarScan2)
PL15	MIDI IN2 DIN connector
PL16	DC input/ouput, 5V/500mA max.
PL17	DC input, 9..12V/500mA
PL18	Shift register scan board (Scan16, Scan61 or Bass25)
PL19	MIDI OUT DIN connector (optional)
PL20	Aux MIDI output for MAG, TTL level (optional)
PL21	MenuPanel LED outputs with MIDI scan driver, sustain and cancel inputs (active low) for other
PL22	MCU ARM Cortex M3 Debug (do not use)
PL23	USB jack (MIDI over USB, updates)
PL24	SD card adapter (optional)
PL25	FT800 graphic display (optional)
PL26	4-pin connector USB (debug, do not use)
PL27	1/4" jack rotary control footswitch
PL28	Serial interface for FTDI cable (debug/Editor)
PL29	Bluetooth or WiFi module (optional)
PL30	1/4" jack swell pedal (FC-7 compatible)
PL31	I2C bus (menu panel, button/switch boards)
PL32	MPX bus (DBX drawbar, PTX pot and ANX boards)
PL33	3-pin connector rotary control foot switch
PL34	3-pin connector FC-7 compatible swell pedal

Power Supply

The HX3.7 board may be powered either from coaxial DC input PL9 (5.5/2.1 mm plug, plus on center pin, DC 9V 500mA wall wart) or from green DC connectors PL17 (9 to 12V input) or PL16 (5V input; 5V output when 9 to 12V power provided to DC jack PL17 or PL9). Voltages exceeding 5.2V on +5V inputs will destroy the board!

If you have to use an external 5V DC supply on DC input PL9, insert JP2 (near DC jack). We do not recommend this configuration since inadvertently connecting a DC supply with more than 5V output will destroy the board!

After powering on, a red LED near PL25 will flicker briefly; it will also flicker when the HX3.7 controller is busy. When the RealOrgan Sound Engine is ready, a yellow LED will dim; it will "breathe" with rotary simulation speed. When the Effects/GM DSP is ready, a blue LED will flash every second. The blue LED will blink on/3x briefly off when the DSP is in Bootload mode, ready to accept a DFU firmware update by USB.

Board Configuration

From factory, HX3.6 boards are programmed with MIDI Expander firmware (no analog inputs). It should deliver a basic organ sound on audio outputs with MIDI input even with no other peripherals connected. Basic functions are available if a MenuPanel is connected. You have to set at least some System Init parameters after installing a different firmware. See Configuration by HX3 Manager section below.

MenuPanel

HX3 MenuPanel, fitted with optional LEDs

Our MenuPanel allows convenient adjustments of various HX3 parameters to tweak your setup. Two versions available, short one without indicator LEDs intended for organ installation.

Connect HX3 MenuPanel to PL31 PANEL using a 10-wire flat ribbon cable. If you use the HX3 MenuPanel in parallel/simultaneously with Preset12-2 and Preset16 boards, it should be the last module on the chain connected to PL26, since it has only one bus connector.

Long version menu panels have a separate connector for the 7 LEDs that goes to PL18 4014 SCAN (!) on the mainboard for MIDI Expander (with MIDI scan driver, no scan board used). As HX3.7 does not provide I2C LED drivers, the FPGA's MIDI scan driver manages MenuPanel LEDs instead.

Configuration by HX3 Manager

The HX3 Manager application is a comprehensive solution for editing HX3 board parameters and settings. It is available on our HX3 Update Page for download.

• Connect HX3.7 to your PC via USB.
• Start HX3 Manager
• Connect to "HX3.5 Sound Engine" device. Note: For legacy compatibility of USB driver, HX3.7 USB still identifies as "HX3.5 Sound Engine".
• Open Updater window.
• Click "Get Board Info", it will show current configuration.
• Open Editor window to edit board settings.

See HX3 Manager User Manual, printable PDF file for details.

Parameter Tweaking

Adding hardware to your HX3.7 board may require some parameter tweaking to get it running. By factory, HX3.7 is configured as a MIDI expander; it will not poll or drive any peripherals attached except the MenuPanel. For example, if you attach the FatarScan2 board, you need to update the scan driver as well. If you attach drawbars, buttons or switches, you need to enable these.

As of today, tweaking parameters that are not present in the menu system is only possible by HX3 Manager/Editor.

Updates

See page HX3 Bootloader Update (english) for details on board update procedures.

Power-up Checklist

• Check power consumtion. Bare HX3.7 board with MenuPanel should not exceed 300mA on+5V or 200mA on +9V power inputs.
• Is MIDI IN working? Brand new boards should deliver a basic organ sound on audio outputs with MIDI input on MIDI channel 1. Right 5-pin DIN connector (seen from back) is always a MIDI IN.
• Is an appropiate Scan Driver installed? You may replace the Scan Driver by using the Updater in HX3.6 Manager. Use Update menu and select "Scan Driver file". HX3.6 Updater will prompt for a DAT file, open either scanmidi.dat, scansr61.dat, or scanfatr.dat, depending on your needs.
• Are HX3.7 System Inits correct? HX3.7 will not scan buttons or analog inputs if not set correctly. Use the Editor in HX3 Manager and click on pink System Inits button. Click Get Group in the Action menu to refresh table entries.
• Are analog drawbar inputs working? With all analog inputs enabled (parameter 1503>1), check if changes on drawbars are to be seen on Upper DB rsp. all other analog input groups when clicking Get Group button.
• Are analog volume inputs working? Non-working analog inputs may have been remapped to "not assigned". See Analog Remap group.

MIDI Configuration

The HX3.7 board is configured by factory as MIDI Expander with two MIDI inputs. Left MIDI DIN connector (seen from back) is MIDI IN2 on HX3.7; it may not be configured as MIDI OUT like on HX3.5 or HX3.6. For +5V phantom supply on MIDI IN2 set jumpers JP5 and JP6 as imprinted on board. When phantom supply jumpers are installed, MIDI IN2 DIN jack carries ground on middle pin 2 and +5V on two otherwise unused outer pins 1 and 3. Phantom supply may be used to power BASS25 MIDI scan board connected to left DIN socket.

MIDI over USB is available if USB socket PL23 is installed. Please note: Due to hardware restrictions, MIDI IN2 and USB MIDI IN must not be used simultaneously. Transmission errors will occur!

HX3.7 provides a MIDI OUT socket onboard (not mounted by default). MIDI OUT socket may also be mounted on JackExtension board (wee below).

USB Port

An USB type B connector may be soldered to position PL23 if needed. It is not populated by factory to ensure mechanical compatibility with existing rear panels. In addition, the USB signal is available on header PL26 (near USB jack) to route USB to our HX3.5 extension board. The USB port is configured as a "MIDI over USB" device by default. In DFU update mode it becomes the port for the HX3.7 DSP update application.

Important: When using a "MIDI over USB" connection (as the HX3 Manager does), disconnect any MIDI device from secondary (left) MIDI input DIN jack as they share the same MIDI input line.

USB port is also used for DSP firmware or soundbank updates.

Mini USB Adaptor installation

For use with the old HX3.4 back panel with mini-USB cutout, connect the mini-USB adapter as follows:

HX3.7 PL26	USB adapter	USB cable color
G	GND	black
D +	D +	green
D -	D -	white
V +	VCC	red

Audio Output Jacks

In addition to left/right 1/4" audio jacks, the stereo audio signal is present on PL4 (center = analog ground). To provide rotary simulation organ signal (separate left and right channel jacks) on PL5 and PL7, jumpers JP1 and JP3 must both be set in "R" position. Audio level is 300mV RMS nominal.

Audio jacks may be configured as stereo headphone jack (rightmost, seen from behind) and L/R stereo jack (near +9V jack) as well, using a Y- or stereo 1/4" cable on PL7 for audio output. Jumpers JP1 and JP3 must both be set in "HDPH" position.

HX3.7 Audio Jumper
JP1/JP3	PL5 jack function, headphone (both in HDPH position) or audio R (both in R position)
Default jumper setting: JP1/JP3 in R position

HX3.7 board has optional effect loop inputs and optional integrated Leslie control ciruits, called the HX3.7 EFX version. HX3.7 EFX provides separate DAC channels for external Leslie™ speaker (see section Leslie™ Control) as well as an audio effect loop input ADC, available on PL2, PL8 and JackExtension board.

Swell and Footswitch Jacks

A standard potentiometer-type swell pedal like Yamaha™ FC-7 may be connected to PL30 1/4" jack. Swell function is also available via MIDI controller; however, MIDI loudness resolution is limited. HAMD position of JP10/JP11 swaps tip and ring of PL30 jack. This may also applicable for some other brands (CASIO™ etc).

HX3.7 Swell Jumpers
JP10, JP11	Select Hammond™ or Yamaha™ FC7 pinout of swell pedal jack
Default jumper setting: 2 jumpers in position FC7

A single or dual footswitch may be connected to PL27. Set System Inits in HX3 Manager/Editor according to footswitch type (default: latching switches).

Jumpers

HX3.7 Mainboard Jumper
JP1/JP3	PL5 jack function, headphone (both in HDPH position) or rotary R (both in R position)
JP2	Analog Gnd (Probe Connection), both pins
JP4	5V DC input on PL10/PL12 (wall wart connector) if jumpered, otherwise 9..12V if open
JP5/JP6	MIDI IN2 +5V phantom supply for bass pedal if both present
JP7	FPGA config disable (debug, do not use)
JP8	Power supply +5V over USB (can cause noise, default open)
JP9	Digital Gnd (Probe Connection), both pins
JP10/JP11	Select Hammond (HAMD position) or Yamaha FC7 type swell pedal
Default jumper setting: JP1/JP3 in R position, JP10/JP11 in FC7 position

Note: HAMD position of JP10/JP11 swaps tip and ring of PL30 jack. This may also applicable for some other brands (CASIO etc).

Leslie™ Control

HX3.7 EFX has integrated "ExtensionBoard" circuits to provide audio and control signals on PL1 for an external 11-pin Leslie™ speaker (all newer models). You may obtain our Leslie Socket adaptor for easy connection.

Box header PL1 carries signals for an external 11-pin Leslie. Pins 1 to 11 are wired 1:1 to a 11-pin Amphenol socket. For old 9-pin Leslie™ installations, small 5V relays may be needed as some Leslie™ speakers use negative switching voltage. Three 5V relays (common coils to +5V pin) may be driven directly from 11-pin control outputs 6, 7 and 8.

Nominal audio output voltage is 1.5V RMS on PL1 which is a little lower than old ExtensionBoard (2V RMS), adjustable by trim pots R12 (rotary channel) and R33 (dry stationary/bass channel). Note: Too high output levels may lead to distortions on output. Increase input level of Leslie speaker instead if needed.

Leslie Socket Adaptor

Diode D1 to be removed

PL1 Leslie 11pin Connector
Pin	Funktion
1	Rotary audio channel (organ), 1.5V RMS, to pin 1
2, 3, 10	Stationary audio channel (bass pedal), 1.5V RMS, to pin 2 resp. 3 and 10
4	Audio ground, to pin 4
5	Common ground for control signals, to pin 5
6	Leslie Power On (MOSFET switches positive voltage to ground, active low), to pin 6
7	Leslie Fast (MOSFET switches positive voltage to ground, active low), to pin 7
8	Leslie Slow/Run (MOSFET switches positive voltage to ground, active low), to pin 8
11	Leslie +30V supply (clamping), to pin 11 (optional, may be left open)
12	Additional analog Gnd output, not connected
13	Additional digital Gnd output, not connected
14	Auxiliary +5V supply output for relays if needed
R12 R33	Trim pots control rotary and stationary levels on PL1

Please note: Some 11-pin Leslies like HL-822™ will not shut off completely when HX3 is powered down. In this case, remove diode D1 (near PL1 Leslie™ connector). Heat with soldering iron on both sides and swipe away.

JackExtension Connector

HX3.7 JackExtension board

Box header PL2 carries audio signals for additional jacks, MIDI out signal and footswitch inputs (active low = connect to ground) for sustain/sostenuto functions.

PL2 Extension Jacks Connector
Pin	Funktion
1	Headphone Left
2	Headphone Right
3	Ext Out L (plain ORGAN signal)
4	Ext Out R (plain PEDAL signal)
5	Ext In L (Effect Loop Input, mixed to mono)
6	Ext In R (Effect Loop Input, mixed to mono)
7	Sustain Footswitch
8	Sostenuto Footswitch
9	MIDI OUT (-, DIN pin 5)
10	MIDI OUT (+, DIN pin 4)
11	Efx Jack Insert Switch (open when inserted, Gnd when not)
12	Vcc +5V
13, 14	Analog Ground
15, 16	Digital Ground

Note: A small board will be available which makes installation of additional HX3.7 connectors easier. HX3.7 JackExtension will be used in futute 19" rack expander. It replaces the former HX3 ExtensionBoard. HX3.7 JackExtension connects to HX3.7 PL2 and only carries passive/mechanical parts for convenient wiring. For OEM applications, JackExtension may be customized to existing chassis layouts. A MIDI OUT connector may be mounted here instead of mainboard.

Digital Inputs

As stated above, HX3.7 does not provide any digital button/tab switch inputs. Instead, additional Extend16 or Preset16 boards may be used for tabs, buttons and switches. Connection of digital controls (tabs, buttons, switches) to HX3.7 is made in the same way as for HX3.6 external digital inputs. Old Panel16 boards may not be used without HX3.7 LegacyBoard (see below). For default tab functions, use Preset16 or new Panel16-I2C jumpered to group #2 address $62 instead.

Analog Inputs

As stated above, HX3.7 does not provide any analog control inputs. Instead, additional DBX9/DBX12, PTX4 or ANX8 boards may be used for drawbars and potentiometers. Connection of analog controls to HX3.7 is made in the same way as for HX3.6 external analog inputs. For compatibility with existing installations, you may consider the HX3.7 LegacyBoard (see below).

Connecting Keyboard Scan Board(s)

For lowest latency, a hardware scan board may be attached for Fatar and single-contact keybeds.

HX3.7 VibratoSwitch I2C

HX3.7 VibratoSwitch I2C

HX3.7 does no longer provide a header for vibrato rotary switch connection. New HX3.7 VibratoSwitch I2C board provides a 6-way rotary switch as well as an interface circuit for I2C bus on PL31. It is connected in the very same way as other button/switch interface boards (Preset16, Extend16, MenuPanel).

The HX3.7 VibratoSwitch I2C board is not needed when using the HX3.7 LegacyBoard (see below) as this provides its own vibrato switch circuitry.

HX3.7 LegacyBoard

LegacyBoard connection to HX3.7 Mainboard

As HX3.7 does no longer offer legacy analog and switch inputs, the HX3.7 LegacyBoard will be available to connect existing passive switch/button boards like Panel16 (2x8 = 16 inputs, two 10-pin headers), analog drawbar controls (2x12 = 24 inputs, two 16-pin headers) and a 6-way rotary vibrato switch (10-pin header). It provides the box headers of previous mainboards for up to 24 drawbars, 16 buttons/switches and vibrato rotary switch. The LegacyBoard is not needed for new installations using the MPX bus/connector (all DBX/PTX/ANX boards). LegacyBoard PL1/PL5 connect to HX3.7 PL31 PANEL I2C and PL32 ANLG MPX box headers as seen in picture. Route-through box headers (PL4/PL10, right) are provided for both, allowing easy daisy-chaining to MenuPanel or additional input boards.

Connection of analog and digital controls to HX3.7 LegacyBoard is made in the same way as for HX3.6 internal analog inputs and HX3.6 internal digital inputs:

• Connect old-style drawbars, old DB9/DB12/DB9 MPX drawbar boards or potentiometers to PL2 ANLG UPR and PL3 ANLG LWR of HX3.7 LegacyBoard
• Connect old Panel16 or buttons/switches to PL7 and PL8 of HX3.7 LegacyBoard
• Connect vibrato rotary switch to PL6 of HX3.7 LegacyBoard
• Insert jumper JP1 and JP2

Please note: On HX3.7 LegacyBoard, the internal analog inputs PL2 ANLG UPR and PL3 ANLG LWR are emulated by external analog MPX inputs (starting at param #5024 in HX3 Editor). Analog input assignments #5000 to #5023 do not exist on HX3.7, even with LegacyBoard connected. The parameters #5024 to #5047 are responsible instead.

Optional PL9 control output is available on OEM request (U13 and PL9 not populated on standard HX3.7 LegacyBoard). If U13 and PL9 are installed, remove jumper JP1 and JP2.