|- PERSONALITY BOARD|
|- Personality Boards Information|
|- Cable Connector Pin Locator|
|- HLN4270A DVP Interface Board and Tx Audio Routing|
|- HLN4270B DVP Interface Board and Tx Audio Routing|
|- HLN4425A DVP Interface Board and Tx Audio Routing|
|- HLN5008A DVP Interface Board and Tx Audio Routing|
|- J401 Common Circuits Board Connector|
|- J103 Optional HLN5008A Interface Board Connector|
|- Microprocessor Part Numbers|
|- Motorola Manual Errata|
|- Syntor X Home|
Personality boards information:
The Personality Board is the Syntor X printed circuit board which contains the radio's microprocessor, memory module, J1 cable connector, PL/DPL encoder/decoder, optional DVP Interface Board support and the receiver audio section. Some Personality Boards also have the optional Hand Held Control Head processor board support. All the Personality Boards have a high/low Tx power select control bit, but only specially equipped VHF radios make use of this control. Most high/low radios cannot reduce the maximum high power setting by any more than one half on low power (i.e. 110/55 watts or 40/20 watts). However, there is also a special 110/10 watt high/low power VHF radio.
The HHCH support mentioned below only refers to the specific HLN4728 Interface Board version of the HHCH. The HLN4728 Interface Board must be installed inside the Syntor X radio drawer, above the Personality Board. This requires the Personality Board to have special jumpers and connections just for the HLN4728 Interface Board (i.e. the HHCH support mentioned below). There are other versions of HHCH radios that use an external SIU that will potentially work with any Personality Board. Therefore, if you see a notation that the HHCH is not supported, keep in mind it only refers to the internal HLN4728 Interface Board HHCH.
There are different versions of these boards. HLN4915, HLN4760, HLN4257 and TRN8861 are all Motorola part numbers for the conventional Syntor X Personality Boards.
The HLN4915A Personality Board is for low band radios only (models starting with T51 and T71). The only difference between the HLN4915A and HLN4760A is on the HLN4915A, inductor L2 is replaced with a wire and Q4 uses a different transistor part number. The later HLN4760B and HLN4760C Personality Boards added a built in jumper header to optionally bypass L2 in low band radios and they use the same Q4 part number as the HLN4915A. See the HLN4760 A, B & C description below form more information on this board.
The HLN4760 A, B & C Personality Boards are typically used in Low Band (B and C only), VHF and UHF Syntor X radios. These boards and the HLN4915A are the only boards that support the HLN4728 Hand Held Control Head (HHCH) interface board and the HLN5008A DVP Interface Board. They do not support the special 110/10 watt power selectable VHF radio because the HLN5008A is missing the control relay interface (a custom setup could be made). The HLN4760 boards are also used in special application radios that normally would use different Personality Boards (i.e. an 800 MHz radio with DVP). The HLN4760C is the only Syntor X Personality Board board that can support DVP-XL.
The HLN4257A Personality Board is typically used in the VHF T53 and T83 Syntor X radios. This board does not support DVP or the Hand Held Control Head. This board can support the HLN4270A, HLN4270B and HLN4425A DVP Interface Boards, but is lacking the header pin connectors (see HLN4257B below). This Personality Board does support the special 110/10 watt power selectable VHF radio when a DVP Interface Board is installed (a very special RF PA deck is also required), however, only the 110/10 watt power control part of the DVP Interface board is used.
The HLN4257B (also known as HLN4257A-SP700) Personality Board is typically used in the DVP "VXJ" versions of the VHF T53 and T83 Syntor X radios. This board does not support the Hand Held Control Head. This board does support the HLN4270A, HLN4270B and HLN4425A DVP Interface Boards This Personality Board is the same as the HLN4257A board (see above), except it has header pins installed on it to plug in the HKN4117A cable for the HLN4425A DVP Interface Board or the cable for the HLN4270A/B DVP Interface Board. This Personality Board does support the special 110/10 watt power selectable VHF radio when a DVP Interface Board is installed (a very special RF PA deck is also required).
The TRN8861 Personality Board is typically used in the 800 MHz Syntor X radios. This board does not support DVP or the Hand Held Control Head. It is the only board that uses the clock signal from the receive RF board instead of having its own microprocessor crystal (there is no Y1 crystal next to the 40 pin microprocessor chip, which can also be used to identify this board if the part number tag is missing).
A & B
|Description (HLN4728 Interface)|
|1||VIO||Control Head Strobe (Output)|
|2||BLK-BRN||Detected Audio (Output)|
|3||BLK-GRN||Volume - Receiver Audio (Input)|
|5||PTT ref||PTT ref /
|PTT ref||BLK-RED|| PTT Reference (Input)
DVP XL (Output) (J21, R33)
|6||RED-ORG||Squelch Tail (Output)|
|7||DVP||DVP||spare*||RED-BRN||Securenet Modulation (Input)|
|9||Switched B+ to Accessories|
|11||WHT-VIO||Mode 12 (I/O) - HHCH List|
|12||WHT-BLK||Mode 5 (I/O) - HHCH Up|
|13||BLU||Mode 1 (I/O) - HHCH Sys On|
|15||YEL||Switched B+ (Input)|
|16||WHT-BRN||Mode 6(I/O) - HHCH Clock|
|17||WHT||Mode 2 (I/O) - HHCH Program|
|18||spare||spare||spare||Unused - HHCH Ignition|
|19||WHT-GRN||Mode 10 (I/O) - HHCH +5 Volts|
|20||Transmit Indicator (Output)|
|21||DVP||DVP||spare*||RED-GRN||Transmit Mode (Input)|
|22||GRN||Speaker Audio Low (Output)|
|23||WHT-RED||Mode 7 (I/O) - HHCH Data|
|24||GRY||Mode 3 (I/O) - HHCH Squelch Disable|
|25||BLK||Mode 4 (I/O) - HHCH Down|
|26||WHT-YEL||Mode 9 (I/O) - HHCH PL On/Off|
|27||BLK-YEL||Mic. Hi (Input)|
|29||WHT-ORG||Mode 8 (I/O) - HHCH Jumper to 32|
|30||WHT-BLU||Mode 11 (I/O) - HHCH CH Strobe|
|31||WHT-GRY||Channel Scan Enable (Input)|
|32||BLK-BLU||PL/DPL Disable (Input)|
|33||Disp En||DVP XL||Disp En||BLK-GRY|| Display Enable (Input)
DVP XL (Input)
|34||DVP||DVP||spare*||RED-BLU||Sidetone In (Input)|
|35||DVP||DVP||spare*||EMS Mute (Output)|
|36||DVP||DVP||spare*||RED-YEL||Transmit DVP (Input)|
|37||ORG||Speaker Audio Hi (Output)|
Since I do not have any DVP XL manuals this information is incomplete.
The HLN1125A Orange Label Memory Modules used in early model radios increase the standby current by 40 ma nominal, 60 ma maximum. The HLN1125B used in later model radios does not increase the standby current.
For Personality Board jumper settings see the Radio Jumper Settings section.
|J401 Common Circuits Board Connector|
Tx Data Enable (Input)
Tx Data (flat audio modulation, no deviation limiter or bandwidth filtering) (Input)
Tx PL/DPL (Input)
|4||Tx PL/DPL Enable (Input)|
|5||Mic. High (Input)|
|6||Mic. Enable (pre-emphasized with deviation limiting and bandwidth filtering - IDC) (Input)|
|7||Synthesizer Adapt (Input)|
|8||Keyed 9.4 volts (Input)|
|9||Transmit Indicator (SP option) (Output)|
|10||PA Enable (Input)|
|11||Switched + 9.6 Volts (Output)|
|12||Switched + 5 Volts (Output)|
|13||Switched B- (Ground)|
|14||VCO Modulation (Output)|
|15||Switched B+ (from control head power switch) (Input)|
|17||Reference Modulation (Output)|
|18||Tx High/Low Power Control (optional) (Input)|
|19||Channel Activity (Output)|
|20||Squelch Tail (Output)|
|J103 Optional HLN5008A Interface Board Connector|
Reverse Burst PL Enable (also called EOM Enable) (Output)
Switched + 9.6 Volts (Input)
Transmit DVP (shorted to J103 pin 4 on HLN5008A) (J1 pin 36) (Input)
|4||Data Enable (shorted to J103 pin 3 on HLN5008A) (J401 pin 1) (Input)|
|5||Priority Sample Mute (also called EMS Mute) (Input)|
|6||Sidetone Input (J1 pin 34) (Input)|
|8||Transmit Mode (J1 pin 21) (Input)|
|9||Detector Mute Control (used with Mobile Voice Storage option) (Output)|
|10||PL/DPL Enable (J401 pin 4) (Output)|
|11||Keyed 9.4 volts (Input)|
|12||Switched B- (Ground)|
|13||EMS Mute (J1 pin 35) (Output)|
|14||Sidetone Out (Output)|
|Personality Board U8 Microprocessor Part Numbers|
Motorola manual errata:
The circuit board diagrams (the 2 color drawing of the PC board traces) in manual 68P81060E05 are not numbered correctly for J4 (1 is really 3 and 3 is really 1). Or possibly J4 on the schematic is not numbered correctly. You should be aware of this if you are making packet modifications.
Jumper JU8 on the HLN4760 Personality Boards is also connected to J103 pin 4. It is drawn in the schematic, but you have to match up J401 pin 1 from opposite sides of the drawing yourself (i.e. the exact same J104-1 connection is shown separately in two different places in the schematic, so the schematic is accurate, but confusing). J401 pin 1 is the modulation "Data Enable" control line. On "VXJ" radios J103 pins 3 and 4 are shorted by the HLN5008A board, connecting JU8 to J1-36 (Transmit DVP). This is why installing JU8 will restore normal voice and PL/DPL operation operation on "VXJ" radios that do not have external DVP hardware any longer. Here is an illustration with the connector-pin numbers. J401 is the ribbon cable that connects the Personality Board and Common Circuits Board. J103 is the HLN5008A DVP Interface Board connector. This same JU8 to J1-37 connection is also made by the HLN4270A, HLN4270B and HLN4425A DVP Interface Boards via their cables.
PL, Private Line, DPL, Digital Private Line, MPL, Talkaround, MDC-600, MDC-1200, MVS-20, Securenet, Smartnet, Privacy Plus, Trunked X2, Trunked X3, Touch Code, Quick Call II, Channel Scan, Talkback Scan, System 90, System 90*s, Systems 9000, Mitrek, Micor, Spectra, MataTrac, Syntor, Syntor X, Syntor X 9000 and Syntor X 9000E are trademarks of Motorola Inc.