Vocoder and Controller Boards Detailed Theory of Operation 6 Introduction to This Section This section of the manual provides a detailed circuit description of the ASTRO Digital XTS 3000 vocoder and controller boards. When reading the theory of operation, refer to your appropriate schematic and component location diagrams located in the back section of this manual. This detailed theory of operation will help isolate the problem to a particular component.
U401 32Kx8 SRAM A0-A15 U402 32Kx8 SRAM D0-D23 U403 32Kx8 SRAM Host Port U405 DSP56001 EXTAL U404 256Kx8 FLASH MODA MODB BUS CONTROL SCI SERIAL HC11/DSP Interface To Controller Board Encryption Interface To Secure Board SSI SERIAL Gata Array Logic System Clock Tx D/A General Purpose I/O U406 ADSIC ABACUS Rx Interface Speaker D/A Microphone A/D Serial Config.
The DSP sends the processed signal back to the ADSIC for D/A conversion. The result is then sent to the audio PA for the speaker output. In the transmit mode, the ADSIC (U406) provides a serial digital-toanalog (D/A) converter. The data generated by the DSP is filtered and reconstructed as an analog signal, and sent to the VCO as a modulation signal. Both the transmit and receive data paths between the DSP and ADSIC are through the DSP SSI port.
specific information and radio personality features. The FLASH ROM contains the programs which the HC11F1 executes. The FLASH ROM allows the controller firmware to be reprogrammed for future software upgrades or feature enhancements. The SRAM is used for scratchpad memory during program execution. The SLIC (U702) performs many functions as a companion IC for the MCU. Among these are expanded input/output (I/O), memory decoding and management, and interrupt control.
by a single bicolor LED on the top and (on models II and III) a fourline, twelve-character display. The controller schedules the activities of the DSP through the host port interface. This includes setting the operational modes and parameters of the DSP. The controlling of the DSP is analogous to programming analog signaling ICs on standard analog radios.
RX Signal Path The vocoder processes all received signals digitally. This requires a unique back end from a standard analog radio. This unique functionality is provided by the ABACUS IC, with the ADSIC (U406) acting as the interface to the DSP. The ABACUS IC, located on the transceiver board, provides a digital back end for the receiver section.
ODC is a clock that ABACUS provides to the ADSIC. Most internal ADSIC functions are clocked by this ODC signal at a rate of 2.4 MHz; it is available as soon as power is supplied to the circuitry. This signal initially may be 2.4 or 4.8MHz after power-up. The ODC signal is programmed by the ADSIC, via the SBI signal, to 2.4MHz when the ADSIC is initialized by the MCU through the SPI bus. For any functionality of the ADSIC to exist, including initial programming, this reference clock must be present.
The ADSIC contains four general purpose I/O lines, labeled GCB0 through GCB3. These are connected to the AUDIO PA, and are used for enabling the speaker and microphone amplifiers in the IC and for steering the speaker and microphone audio paths from internal to external. These I/O lines are controlled by the DSP through the ADSIC parallel configuration bus.
space, starting at Y:FFF0. The ADSIC provides an 8kHz interrupt to the DSP on IRQB for processing these microphone data samples. As with the received trunking low-speed data, low-speed data is processed by the MCU and returned to the DSP at the DSP SCLK port, connected to the MCU port PA0. For secure messages, the analog signal may be passed to the secure module for encryption prior to further processing.
Controller Bootstrap and Asynchronous Buses The SB9600 bus is an asynchronous serial communications bus utilizing a Motorola proprietary protocol. It provides a means for the MCU to communicate with other hardware devices. In the ASTRO Digital XTS 3000 radio, it communicates with hardware accessories connected to the universal connector. The SB9600 bus utilizes the UART internal to the MCU, operating at 9600 baud. The SB9600 bus consists of LH_DATA (J101-2) and SB9600_BUSY (J101-8) signals.
MODB pins of the MCU to bootstrap mode (logic 0,0) and configures the MUX (U704) to separate the RXD and TXD signals of the MCU SCI port. Now, if the Vpp voltage is raised to 12Vdc required on the FLASH devices for programming, the circuit comprising VR121, Q109, and Q110 will trip supplying Vpp to the FLASH devices U727 and U404. One more complication exists in that the BOOT_DATA_IN signal (RXD) is multiplexed with the RS232 data out signal RS232_DATA_OUT.
SPI Bus Interface This bus is a synchronous serial bus made up of a data line, a clock line, and an individual IC unique select line. It's primary purpose is to configure the operating state of each IC. ICs programmed by this include: display module, ADSIC, fractional-N synthesizer, pendulum reference oscillator, DAIC and, if equipped, the secure module. The MCU (U701) is configured as the master of the bus. It provides the synchronous clock (SPI_SCK), a select line, and data (MOSI [Master Out Slave In]).
Most of the signals are extensions of circuits described in other areas of this manual. However, there are two option select pins used to configure special modes: Option Select 1 and Option Select 2. These pins are controlled by accessories connected to the universal connector. Table 1 outlines their functions as defined at the universal connector.
S1 S901 ON/OFF To Controller J101 5 R901 3 4 SW3 TOP BUTTON VOL 2 1 2 +5V 1 UNSW_B+ (33) S2 +5V (35) TOGGLE SWITCH (TG1) (34) VOL (31) TOGGLE SWITCH * EMERG (14 or 41) +5V SB1 (MON) R2 68K SB2 R3 150K SB3 D1 B+_SENSE (32) GREEN_LED (22) RED_LED (21) 4 3 2 1 INT_PTT* (38) RTA0 (27) RTA1 (24) RTA2 (26) RTA3 (25) SECURE/CLEAR (TG2) SWITCH (23) R1 91K 1 U1 2 Zone/Channel 4 Select 8 B C C A SW2 PTT +5V D2 D3 4 3 4 3 2 1 2 1 4 3 4 3 2 1 2 1 DGND (15) D5 * NOTE:
U1 is a binary-coded switch. The output pins from U1 are connected to I/O ports on the controller, which provides a four-bit binary word to the MCU, indicating which of the 16 positions the rotary is set to. This switch provides an additional output, TG2, which is typically used for coded or clear mode selection. It is an input to a control I/O with a pull-up resistor. Selecting clear mode pulls this signal to logic low.
MAP 2 $0000 NON-MUX 32K COMMON $0000 External RAM $1000 $2000 Int EE F1 REGS $1060 $3000 $4000 $5000 * F1 INT RAM SLIC REG HOST PORT * $6000 $0E00 $1000 Ext RAM $1400 $1500 $1600 $1800 $7000 $8000 External RAM $9000 $A000 $B000 $C000 $3fff $D000 $E000 $F000 $FFFF SLIC III REGISTER $1400 - $14FF F1 REGISTERS AND MEMORY: * * COMMON ROM RAM BANKED ROM/EEPROM CONTROLLED BY SLIC EXTERNAL EEPROM CONTROLLED BY F1 INT RAM: $1060-$13FF INT EE: $0E00-$0FFF REGISTERS: $1000-$105F
Vocoder Memory Map The vocoder (DSP) external bus consists of three 32k x 8 SRAMs (U401, U402, and U403), one 256k x 8 FLASH ROM (U404), and ADSIC (U406) configuration registers. Refer to Figure 16.
banks from the ROM. This provides decoding for 128k bytes from the ROM in the P: memory space. PS* is used to select A17 to provide an additional 128k bytes of space in Dx: memory space for the ROM. The ADSIC internal registers are decoded internally and start at $E000 in Dy:. These registers are decoded using A0-A2, A13-A15, and PS* from the DSP. The ADSIC internal registers are 16 bits wide, so only D8-D23 are used. The DSP program code is stored in the FLASH ROM, U404.
Radio Power-Up/ Power-Down Sequence Radio power-up begins when the user closes the radio on/off switch on the control top, placing 7.5Vdc on the B+_SENSE line. This signal enables the pass element Q106 through Q105, enabling SW_B+ to the controller board and the transceiver board. B+_SENSE also enables the +5Vdc regulator, U709. When +5Vdc has been established, it is sensed by the supervisory IC, U726, which disables the system reset through the delay circuit R208 and C214.
Notes 6-20
7 Secure Modules Introduction The secure modules are designed to digitally encrypt and decrypt voice and ASTRO data in ASTRO Digital XTS 3000 radios. This section covers the following secure modules: • NTN8253 • NTN8328 • NTN8254 • NTN8329 • NTN8255 • NTN8330 • NTN8256 • NTN8331 • NTN8257 • NTN8705 • NTN8258 • 0105956V67 • NTN8259 • NTN8260 • NTN8261 • NTN8326 • NTN8418 NOTE: The secure modules are NOT serviceable.
Circuit Description The secure module operates from three power supplies (UNSW_B+, SW_B+, and +5V). The +5V and the SW_B+ are turned on and off by the radio’s on/off switch. The UNSW_B+ provides power to the secure module as long as the radio battery is in place. Key variables are loaded into the secure module through connector J601, pin 15. Up to 16 keys (depending on the type of encryption module) can be stored in the module at a time.
Disassembly/Reassembly Procedures 8 Introduction to this Section This section gives detailed procedures for disassembling and reassembling the radio. Refer to the diagrams that accompany the text, the exploded view diagrams and parts lists located in the back of this manual, and the ASTRO Digital XTS 3000 Basic Service Manual, Motorola publication 68P81083C85. Items in parentheses ( ) refer to item numbers in the exploded view. Disassembly 1.
5. Remove the main seal (58) from around the casting assembly (54). 6. If you are disassembling a model II or III radio, continue with step 7; if you are disassembling a model I radio, skip to step 10. 7. With the front of the radio facing upward, lift the LCD module (38), with display locator pad (39), up and off of the four locator posts on the casting (54).
Reassembly 1. Reinstall the B+ assembly (52) and B+ seal (53), making sure that the seal seats properly in the casting assembly. Inspect the B+ assembly from the back of the casting to ensure that the seal shows evenly around the B+ assembly. 2. Make sure that a thermal pad (61) is attached to the casting. If it is not, attach a new thermal pad to the casting as indicated in the exploded view. 3.
12.Reinstall the keypad flex attachment bracket (43). Insert the two tabs on the bracket through the two slots in the keypad flex (37) and into the two slots in the controller board (44), then snap down the two casting snaps. 13.Reinstall the LCD module (38), display locator pad (39), and display flex attachment bracket (42).
Ensuring Radio Submersibility Introduction ASTRO XTS 3000 R radio models meet the stringent requirements of U. S. MIL-STD-810C, Method 512.1, Procedure I, MIL-STD-810D, Method 512.2, Procedure I, and MIL-STD-810E, Method 512.3, Procedure I, which require the radio to maintain watertight integrity when immersed in three feet of water for two hours @ 27º ∆T. Radios shipped from the Motorola factory have passed the water immersion test and should not be disassembled.
Miscellaneous Hardware Other items needed for testing the submersible radio include: • Large water container. • Deionized (DI) water • A supply of replacement seals, o-rings, and gaskets (refer to the ASTRO XTS 3000 R exploded view parts list). Disassembly and Reassembly If disassembly and reassembly of the radio is required, refer to the “Disassembly/Reassembly Procedures” in this manual. Disassembly Disassemble the radio according to the “Disassembly” section of this manual.
Conducting the Test 1. Attach the vacuum hose to the vacuum pump. Check the pump and hose for leaks by blocking off the open end of the hose and operating the pump a few times. The actual reading of the gauge at this point is not important; it is important that the gauge pointer remains steady, indicating no vacuum leaks in the pump. 2. Remove the vacuum test port (see Section 13, page 72, item 62) using a 7/64” Allen key. Remove the O-Ring; item 63. 3.
Conducting the Test 1. Remove the vacuum test port (see Section 13, page 72, item 62) using a 7/64” Allen key. Remove the O-Ring; item 63. 2. Screw the adapter (with gasket) into the tapped hole in the casting. 3. Attach one end of the pressure hose to the adapter and the other end to the pressure pump. 4. Cover the vent port seal (65) and label (66) on the back of the casting with your thumb. This will prevent air from going through the seal.
Troubleshooting Leak Areas Before repairing any leak, read all applicable area repair paragraphs. This will help to eliminate unnecessary disassembly and reassembly of a radio with multiple leaks. Troubleshoot only the faulty seal areas listed in the “Pressure Test” section, and, when multiple leaks exist, in the order listed. NOTE: Housing Before reassembling the radio, always install a new main seal o-ring, and new seals in the defective area. 1.
7. Using a pair of needle nose pliers, unsnap the left snap of the controls bracket assembly. 8. Remove the controls bracket assembly. 9. Remove and discard the controls seal. 10. Inspect the housing seal surfaces for debris. Remove any debris. 11. Install a new controls seal. 12. Install a new main seal o-ring around the casting assembly. 13. Reassemble the controls bracket assembly. 14.
15. Inspect the main seal for proper seating. Observe carefully to ensure that the main seal o-ring is not pinched between the housing and the casting. Main Seal 1. Referring to the Disassembly/Reassembly Procedures, remove the housing assembly from the radio. 2. Remove and discard the main seal. 3. Inspect the housing and casting seal surfaces for debris or damage. Remove any debris and replace the housing or casting if damaged. 4. Install a new main seal o-ring around the casting assembly. 5.
housing and the casting. Vacuum Port Seal 1. Remove the vacuum port plug (see Section 13, page 72, item 62), using a 7/64” hex torque bit; remove the o-ring; item 63. 2. Inspect the casting seal surface for debris or damage. Remove any debris and replace the casting if damaged. 3. Install a new o-ring and reinstall the vacuum port plug to the correct torque as specified in Table 2. Table 2 Submersible Radio Torque Specifications Torque (in.-lbs) Torque (N•m) Torque Bit Part No.
9 Troubleshooting Procedures Introduction to This Section The purpose of this section is to aid in troubleshooting a malfunctioning ASTRO Digital XTS 3000 radio. It is intended to be detailed enough to localize the malfunctioning circuit and isolate the defective component. ! Most of the ICs are static sensitive devices. Do not attempt to troubleshoot or disassemble a board without first referring to the following Handling Precautions section.
6. Always wear a conductive wrist strap when servicing this equipment. The Motorola part number for a replacement wrist strap that connects to the table mat is 42-80385A59. Voltage Measurement and Signal Tracing It is always a good idea to check the battery voltage under load. This can be done by measuring the OPT_B+ pin at the universal connector on the back of the radio, with the radio keyed. The battery voltage should remain at or above 7.0Vdc.
Power-Up Self-Check Errors Each time the radio is turned on the MCU and DSP perform some internal diagnostics. These diagnostics consist of checking the programmable devices such as the FLASH ROMs, internal and external EEPROMs, SRAM devices, and ADSIC configuration bus checksum. At the end of the power-up self-check routines, if an error exists, the appropriate error code is displayed on the display.
5. Start EMC: - Set the EMC wake-up line low (emc irq line). - Wait 5ms. - Set the EMC wake-up line high - Wait 10ms. - Set the EMC wake-up line low (emc irq line). - Wait 5ms. - Set the EMC wake-up line high. 6. Begin power-up self-tests. 7. Begin RAM tests: - External RAM ($1800-$3FFF). - Internal RAM ($1060-$1300). - External RAM ($0000-$0DFF). - Display 01/88 if failure. The radio will get stuck here if the internal RAM is defective. The radio uses the internal RAM for stack.
- Fail 02/90 if failure - Wait for the first part of the DSP version number. - Fail 02/90 if 100ms. - Wait for the second part of the DSP version number. - Fail 02/90 if 100ms. 11.Display errors if a fatal error exists at this point. 12.Checksum the codeplug. - Test internal codeplug checksums. - Fail 01/92 if failure. - Test external codeplug checksums. - Error 01/82 if non-fatal error; fail 01/82 if fatal error. 13.Power-up the EMC (if it is enabled in the codeplug). 14.Turn off the green LED. 15.
Standard Bias Table Table 4, below, outlines some standard supply voltages and system clocks which should be present under normal operation. These should be checked as a first step to any troubleshooting procedure. Table 4 Standard Operating Bias Signal Name Nominal Value Tolerance Source UNSW_B+ 7.5Vdc 6.0-9.0Vdc J101 SW_B+ 7.5Vdc 6.0-9.0Vdc Q106 +5V 5.0Vdc ±10% U709 +5VA 5.0Vdc ±10% U710 RESET 5.0Vdc +0.7, -1.0Vdc U702 POR* 5.0Vdc +0.7, -1.0Vdc U726 DSP_RST* 5.0Vdc +0.7, -1.
Troubleshooting Charts 10 Introduction to This Section This section contains detailed troubleshooting flowcharts. These charts should be used as a guide in determining the problem areas. They are not a substitute for knowledge of circuit operation and astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in the theory section prior to troubleshooting a radio.
Chart 20. Volume Set Error............................................................. 10-22 Chart 21. Zone/Channel select Error .............................................. 10-23 Chart 22. Top/Side Button Error .....................................................10-24 Chart 23. Radio Power-up Fail ........................................................ 10-25 Chart 24. Bootstrap Fail.................................................................. 10-26 Chart 25. 800 MHz No TX Deviation...............
START Good PowerUp Self Test? NO YES Go to Transmitter Chart C.37 NO NO Error Message? Display Model? YES NO See Table T1; Power-up Self Check Error Codes Is There TX Power? YES Use RSS to display Error Messages YES Go to No Transmit Audio Chart C.26 NO Is TX Deviation OK? YES YES Receive Audio? Error Message on RSS? NO NO Either Bad Display. (See Chart C.25), or Radio Power-Up Failure (See Chart C.3) Go to No Receiver Audio Chart C.
START Good Power-Up/ Self Test? NO NO Display Model? YES YES Go to Transmitter Chart C.38 NO Error Message? NO See Table T1; Power-up Self Check Error Codes Is There TX Power? YES Use RSS to display Error Messages YES Go to No Transmit Audio Chart C.26 NO Is TX Deviation OK? YES Error Message on RSS? NO Receive Audio? NO Go to No Receiver Audio Chart C.29 Either Bad Display. (See Chart C.25), or Radio Power-Up Failure (See Chart C.3) Is R5 on? Go to No Receiver RF Chart C.
10 1 Radio Power-Up Failure. Synopsis This failure assumes the radio fails to power up correctly and does not send any Power up failure messages via the display or serial bus. Some basic failure modes: 1) Radio is inhibited. 2) Battery voltage is low. 3) A problem exists with a supply or system clock. 4) Host µC code is corrupted. 5) Host FLASH or RAM is faulty. 6) Corrupted host µC configuration register. 7) Host µC or SLIC is faulty. Verify standard bias per table Table 3 pertaining to host µC.
Host µC Bootstrap Failure. Synopsis The host µC bootstrap mode is used during reprogramming of the host µC and DSP FLASH ROMs. Refer to appropriate Theory of operation section for description of bootstrap operation. Since the operating code is downloaded through the serial bus instead of from the ROM and is initially executed in the µC internal RAM, this is a good method of verifying operation of the µC. Basic failure modes: 1) Necessary supplies, grounds, system clocks not present.
10 Synopsis This failure implies a problem with the DC power distribution. It may relate to a battery supply or one of the regulated supplies. Basic failure modes are as follows: 1) Fuse F1 blown. 2) Open in Battery contacts or from flex circuit through P201. 3) Defective switch Q106. 4) Open in B+_SENSE through control top switch or B+_SENSE not detected by µC. 5) Defective +5V regulator. 6) Defective 20-pin compression connector.
Fail 01/81 Host ROM Checksum Failure Visually inspect all leads to U727 with a 5x glass. Repair opens. No Connections good? Yes Use ohmmeter to electrically verify following signal connections to source IC: Signal @ U727 Source HD0-HD7 U701 HA0-HA13 U701 HA14OUT,HA15OUT U702 HA16,HA17 U702 ROMCS1*,ROMCS2* U702 OE*,MEMR/W* U702 CE* U725 VCC +5V VSS GND Repair opens. No Synopsis This failure indicates the Host ROM program code is incorrect.
Fail 01/82 or 002 External EEPROM Checksum Failure Use ohmmeter to electrically verify following signal connections to source IC: Signal @ U706 Source HD0-HD7 U701 HA0-HA13 U701 HA14OUT U702 EE1CS* U702 OE*,MEMR/W* U702 RESET* U726 VCC +5V VSS GND No Repair opens. Synopsis This failure indicates the External EEPROM data containing mostly customer specific channel/mode information is incorrect. Basic failure modes are as follows: 1) The contents of U706 has been corrupted.
Fail 01/84 SLIC Init Failure Synopsis This failure indicates a failure in verification of the data in the SLIC parallel programming registers Some basic failure modes: 1) Missing supply or ground to SLIC. 2) Open in parallel address bus, data bus or associated select lines between the host µC and the SLIC. 3) 4xECLK missing to the SLIC. 4) SLIC is faulty. Verify standard bias per table Table 3 pertaining to SLIC. Isolate and repair problem. No Standard bias OK?.
Fail 01/88 Host µC External RAM Failure. Synopsis This failure indicates a failure in the µC external SRAM at power up test. Some basic failure modes: 1) Missing supply or ground to SLIC. 2) Open in parallel address bus, data bus or associated select lines between the host µC and the SLIC and the SRAM. 3) 4xECLK missing to the SLIC. 4) SLIC is faulty. 5) Improper decoding logic due to open or failure of U708 AND logic gate. 6) SRAM is faullty. Verify standard bias per table Table 3 pertaining to host µC.
Fail 01/92 Internal EEPROM Checksum Failure Verify operation of Power Down Reset Per Fig. W9. Reset Functional? No Replace U726. Yes Reprogram Internal EEPROM. Replace U701. No Synopsis This failure indicates the Host µC interal EEPROM is incorrect. This data contains, among other things, radio tuning parameters. Basic failure modes are as follows: 1) The contents of the internal EEPROM have been corrupted.
Fail 02/A0 ADSIC Checksum Failure Synopsis The ADSIC calculates a checksum of the configuration bus data programmed through the Host µC SPI interface. This failure indicates some problem with the data. It should be noted that this is a non-fatal error as it happened. As the ADSIC controls some of the functions of the DSP memory mapping and interrupts, some aspects of ADSIC programming problems may cause a general DSP hardware failure.
Fail 02/81 DSP ROM Checksum Failure Synopsis This failure indicates the DSP ROM program code is incorrect. It is implied that the DSP found and executed enough valid code at power up to get to the point of verifying the rest. Basic failure modes are as follows: 1) The contents of U404 has been corrupted. 2) The decoding logic comprised of U405 and U406 is not working properly due possibly to circuit opens or shorts or that a failure of one or more of these ICs has occurred. 3) U405 has failed.
Fail 02/88 DSP SRAM U401, U402, or U403 Failure Use ohmmeter to electrically verify following signal connections to source IC: Signal @ U401,U402,U403 D0-D7 D8-D15 D16,D-23 D0-D23 A0-A15 WR*,RD* VCC VSS Repair opens. No Connections good? Refer to section on FAIL 02/A0. Chart C.11 Synopsis On power-up the DSP writes data to the device and then verifies the data. This failure indicates the DSP SRAM failed this pattern/checksum test.
Fail 02/90 DSP Hardware Failure Synopsis On power-up the host µC sends several handshake commands through the host interface to the DSP system to coordinate the power up programming of the ADSIC and detect any DSP power up status messages.. This error indicates the host never received a response from the DSP. The power up code is downloaded from U404 and executed internally in the DSP. This is a wide ranging problem which may be difficult to isolate without special tools.
Fail 09/10 Secure Hardware Failure Synopsis This failure relates only to secure equipped radios and indicates a power up self-test failure for the secure module. More specifically this failure indicates a failure in communications between the Host µC and secure module. The secure module is not considered field repairable so troubleshooting is limited to verifying a problem with the module and replacing. Typical failure modes would be: 1) Open between secure module and vocon board at J601.
Fail 09/90 Secure Hardware Failure Synopsis This failure relates only to secure equipped radios and indicates a power up self-test failure for the secure module. More specifically this failure indicates a failure in communications between the DSP and secure module. The secure module is not considered field repairable so troubleshooting is limited to verifying a problem with the module and replacing. Typical failure modes would be: 1) Open between secure module and vocon board at J601.
Keyload Failure Verify the use of the correct keyloader per the following table: Secure Module Kit(s) KVL Kit(s) Description NTN8253 T3011DX DES NTN8254 T3011DX DES-XL NTN8255 T3011DX DES-OFB NTN8256 T3012DX DVI-XL NTN8257 T3014DX DVP-XL NTN8258 T3011DX DES-OFB/DES-XL NTN8259 T3011DX & T3014DX DES-OFB/DVP-XL NTN8260 T3011DX & T3014DX DES-XL & DVP-XL NTN8261 T3014DX & T3012DX DVP-XL & DVI-XL DES-OFB/DVI-XL T3011DX & T3012DX NTN8326 DVP T3010DX NTN8328 DVI-XL & DVP T3012DX & T3010DX NTN8329 DES-XL & DVP T301
Button Test Place radio in Test Mode. Press Top Side Button (Monitor) so display reads “CH TEST.” This places radio in button test mode. Then press orange top button to verify key codes displayed per Button Table. End Keys correct? Yes No Synopsis This chart relates to a failure in the button functions. Basic Failure modes are as follows: 1) Failure in control top/ptt or keypad flex assembly. 2) Bad connection. 3) Defective switches or pads. 4) Defective A/D port in host µC.
Keypad Error. Synopsis This chart relates to a failure in reading the keypad. Basic Failure modes are as follows: 1) Failure in flex circuit. 2) Bad connection. 3) Defective keypad. 4) Defective port in SLIC. Verify operation of keypad per "Button Check" flow chart C.18.
Volume Set Error Synopsis This chart relates to a failure in volume set knob. Basic Failure modes are as follows: 1) Failure in control top/ptt flex circuit. 2) Bad connection. 3) Defective volume pot. 4) Defective A/D port in host µC. 5) Problem in receive audio circuit. Verify operation of volume knob per "Button Check" flow chart C.18. Refer to "No Receive Audio" flow chart C.27. Yes Volume checks OK? No Using voltmeter, measure voltage at U701-25 while turning volume pot from min to max.
Zone/Channel Select Error. Synopsis This chart relates to a failure in reading the zone/channel select knob. Basic Failure modes are as follows: 1) Failure in flex circuit. 2) Bad connection. 3) Defective switch. 4) Defective port in SLIC. Verify operation of zone knob per "Button Check" flow chart C.18. By studying the adjacent chart against the channel numbers which have errors, one signal may be determined to be in error or verify logic levels at PH3-PH0 at U702 for each channel.
Top/Side Button Error Synopsis This chart relates to a failure in reading the buttons: Top, Top Side, Side Button 1, or Side Button 2. Basic Failure modes are as follows: 1) Failure in controls flex circuit. 2) Bad connection. 3) Defective switch. 4) Defective A/D port in host µC. Verify operation of buttons per "Button Check" flow chart C.18. Using RSS, verify problem button is enabled for function.
10 No Display. Synopsis This chart relates to a failure in the display. The display is considered not field repairable and must be replaced as a uint. Basic Failure modes are as follows: 1) Non-display model radio. 2) Bad connection. 3) Defective µC. Verify display model with RSS. Yes Fix with RSS. Wrong model? No Verify signal activity on P301, pins 1-3 during mode select changes. Replace U701. No Activity? Yes Verify P301 connections and bias. Replace display clip.
1 No TX Modulation (Vocoder Failure) Synopsis This failure indicates a lack of transmit modulation with the fault lying with the vocoder. It assumes no power up fail codes were displayed. Since all modulation modes occur through the same path, this failure applies to digital/ PL,DPL, etc. Failure modes are as follows: 1) Error with host µC in which PTT is not detected. 2) Missing DSP IRQB interrupt. 3) Missing clock or data on SSI port from/to ADSIC. 4) Non functional control of or faulty Audio PA.
No TX Deviation VHF/UHF Transceiver No TX Deviation 800MHz Transceiver Set radio to test mode CSQ. Connect radio to R4005B test box or equivalent and inject a 1KHz mic signal with amplitude sufficient to provide 3KHz deviation (about 11mV RMS). Set radio to test mode CSQ. Connect radio to R4005B test box or equivalent and inject a 1KHz mic signal with amplitude sufficient to provide 3KHz deviation (about 11mV RMS). PTT radio using external PTT switch. Verify signals per Figs. W8 and W10.
No Receive Audio (Vocoder Failure) Synopsis This failure indicates a lack of received audio with the fault lying with the vocoder. It assumes a functional transceiver board and no power up fail codes were displayed. Since all received signal modes occur through this same path, this failure applies to digital/ PL,DPL, etc. Failure modes are as follows: 1) Missing DSP IRQB interrupt. 2) Lack of 2.4 REF clock and/or data from ABACUS. 3) Missing clock or data on SSI port from ADSIC.
Bad SINAD Bad 20Db Quieting No Recovered Audio NOTE: INJECT MODULATED ON CARRIER FREQUENCY SIGNAL AS REQUIRED Spray or Inject 1st IF into XTAL Filter IF FREQS: FL1. 45.15 VHF 73.35 UHF/800MHz YES Inject RF into J2 NO Audio Heard? Check 2nd LO Cntrl Voltage at R413 IF Signal at L605? YES YES RF Signal at T1 (VHF/ UHF), T202 (800MHz) ? 1st LO O/P OK? Locked? YES YES Check Mixer, U2, T1 (VHF/UHF). U205, T202 (800MHz) Check filter between U1 and U2 (VHF/UHF).
FGU No Lo Injection/TX Unlock FGU No Lo Injection/TX Unlock A VDC at VCTRL (TP5), <0.7V? YES NO Replace U204 VDC at V Con Pin 1 U307 <0.7V? YES YES NO 5V at U204 Pin 11, 20, 23 25, 42? NO YES Check continuity between: U204-2 & J1-17, U204-3 & J1-10, U204-4 & J1-9. If no fault found replace U204. NO VDC at U202 Pin 1, 2 & 8 OK? 5V at U302 Pin 11, 20, 23, 25, 42? NO VDC at U204 Pin 21, 28(Tx), 29(Rx) 38 & 39 OK? Replace U202 Replace U204 NO NO YES 2.
VCO TX/RX UNLOCK Check VDC at C246 (VCTRL) Replace U201 NO VDC 13V/0.7V/ Drifting ? RX ONLY * NOTE: If C240 is found defective, change to 2.7PF (VHF)/ 2.4PF (UHF1)/2.4PF (UHF2) TX ONLY * NOTE: If C240 is found defective, change to 2.7PF (VHF)/ 2.4PF (UHF1)/2.4PF (UHF2) YES For VHF check L217. If OK replace U201. NO 4.6V at Collector of Q202? Replace components & go to -VEE crossover freq. tune procedures. Chart C.39 except if L213, L215 are changed.
VCO TX/RX Unlock VDC U307-9 VDC U302-19 NO YES NO YES Check Continuity Between U302-19 & U307-9 5VDC U307-3 777-825MHz 5VDC U307-8 850-870MHz YES NO NO 5VDC U303-6 806-825MHz YES NO YES VDC U302-20 YES VDC U302-17 NO NO Refer to Chart DC Switch C.37 Check C310 if OK Change U302 Measure Freq. U303-15 YES Measure Freq. U302-21 NO VDC U307-1, 7 YES NO NO YES Check L301, C377 if OK Change U303 Refer to FGU Chart C.
No R5 U106 Pin 2 800MHz DC Switch. YES Voltage at U106 Pin 8? NO Yes Replace U106 Voltage at Q503-4? YES Less than 4.8V at U106 Pin 3? NO Replace U102 No YES Voltage at Q107, Pin 2? 5V at U102 Pin 1? NO Voltage at Q107, Pin 3? NO 0V at Q503 Pin 5 - RX Pin 3 - TX? Yes Voltage at U305-1? Yes Check continuity between U305 and Q503. No Check L131, L121 and CR109 and L122 For Open Connections YES Check DC Power Supply Failure Chart C.5 NO YES Replace U202 YES 7.
Replace Ant Switch No/Low Power BAD Check Continuity across U501 Check GOOD Check RF @ GOOD Continuity at RF Connector Ant. Switch J2 BAD GOOD YES RF Input Drive U502-1 >1dBm BAD Check L102, L105, C114, C101, C108 Replace U501 YES NO TX Current >500 mA NO Go to VCO Chart C.34 VDC at Q503 Replace U502 NO Go to DC Switch Chart C.
No/Low Power TX Current > 500 mA? NO Is T5 On at C153? YES Check antenna switch YES YES B+ at U105, Pin 5 (VHF) 5,6 (UHF)? RF at RF Connector,J2 Pin 2? YES 7.5V at U105 Pin 2,4? 2.
VCO-VEE Crossover Freq. Tune Procedure Program Radio to Low Band Edge 136 MHz (VHF) 403 MHz (UHF1) 450 MHz (UHF2) Replace C240 or C223 * VHF UHF1 UHF2 C240(RX) 3.0 2.7 2.7 C223(TX) 2.7 2.4 2.7 NO Is VCTRL (TP5) >3.0V? YES * A complete part description and Motorola part number for ordering is located in the service manual. Program Radio to High Band Edge 178 MHz (VHF) 470 MHz (UHF1) 520 MHz (UHF2) Is VCTRL >11.0V? YES Replace C240 or C223 * VHF UHF1 UHF2 C240(RX) 2.4 2.0 2.0 C223(TX) 2.0 1.6 2.
11 Troubleshooting Waveforms Introduction to This Section This section contains images of waveforms which may be useful in verifying operation of certain parts of the circuitry. These waveforms are for reference only; the actual data depicted will vary depending upon operating conditions. Waveforms 103 Acquisitions T Tek stopped: T 1 Ch1 2.00V M 200us Ch1 -680mV W1: Switched Regulator Clock Out Trace 1 - (U709)LX measured with radio in standby mode with UNSW_B+ at 7.5VDC.
2893 Acquisitions T Tek stopped: Ch1 Freq 19.991kHz Low signal amplitude 1 2 T 3 Ch1 Ch3 5.00V 5.00V Ch2 5.00V M 20.0us Ch1 2.2 V MAEPF-24377-O DATE Ch2 5.00V M 5.00us Ch1 2.2 V MAEPF-24378-O DATE C EN ASTRO SA DSP SSI Por DATE 2/7/94 DESCRIPTION JP ILLUSTRATOR PR EDITOR Waveform W3 LETTERING SIZE: REQUIRES: W3: DSP SSI Port TX mode CSQ. Trace 1 - SC2 Trace 2 - STD Trace 3 - SCK (1.2MHz) DESCRIPTION ENGINEER 5.00V 5.
13 Acquisitions T Tek stopped: Ch1 Freq 74.610kHz T 1 2.00V Ch1 M 10.0us Ch1 W4: ABACUS programming captured during mode change. Trace 1 - (ADSIC) SBI 2.2 V MAEPF-24379-O DESCRIPTIO ABAC ILLUSTRATOR JP PR Tek stopped: EDITOR LETTERING SIZ REQUIRES: Waveform W4 34513 Acquisitions T T Ch1 Freq 2.251920 MHz Low resolution 1 2 3 Ch1 Ch3 2.00V Ch2 500mV 500mV M 5.
18 Acquisitions T Tek stopped: T Ch1 Freq = Hz No period found T 1 T 21 T T 31 Ch1 Ch3 5.00V 5.00V Ch2 5.00V Ch1 M 50ns Ch1 2.2 V MAEPF-24381-O DATE CH EN 103 Acquisitions T T 1 Ch1 Freq 7.9118kHz Low signal amplitude 2 T 3 4 T Ch1 Ch3 5.00V 2.00V Ch2 200mV Ch4 2.00V M 200us Ch1 2.20 V W7: Receive audio: Receiving 1KHz tone @ 3KHz deviation, -60dBm.
507 Acquisitions T Tek stopped: T 1 Ch1 Freq 7.9872kHz Low signal amplitude T 2 3 4 T Ch1 Ch3 Ch2 500mV 5.00V 20.0mV Ch4 500mV M 200us Ch1 1.5 V W8: Transmit Audio. 1KHz Tone which provides 3KHz deviation. Trace 1 - IRQB @ DSP (8KHz) Trace 2 - MODIN Trace 3 - EXT MIC @ node C189/R198 Trace 4 - MAI @ node R207/U718 MICAMPOUT MAEPF-26010-O Waveform W8 Tek stopped: 1 Acquisitions T T 1 T 2 Ch1 2.00V Ch2 2.00V M1.00ms Ch1 4.52 V W9: Power Down Reset.
493 Acquisitions Tek stopped: T Ch1 Freq 2.4038MHz T 1 Ch1 2.00V M 200ns Ch1 1.64 V W10 ADSIC 2.
12 Troubleshooting Diagrams Introduction to This Section This section contains troubleshooting diagrams necessary to isolate a problem to the component level. Use these diagrams in conjunction with the theory of operation, troubleshooting procedures, charts, and waveforms.
J401 Controller Board to Vocoder Board J401 Pin # Description To/ From J601 Controller Board to Encryption Module J601 Pin # Description To/From 1 SW_B+ Q106-5 1 R/W* U701-35 2 SW_B+ Q106-5 EMC_TXD 2 HEN* U702-J7 3 3 A0 U701-17 4 4 A2 U701-15 5 5 VPP Q110 6 6 DSP_RST* U701-58 7 7 EMC_RXD J601-5 8 8 +5V U709-9 9 9 +5V U709-9 10 10 +5VA U710-3 11 11 MICEN U718-14 12 J401-19 N/C EMC_RXD J401-7 N/C MISO U701-65 N/C SPI_SCK U701-67 N/C EMC_REQ U702-
P201 Controller Board to RF Board P201 Pin # Description To/From 1 DOUT* J401-33 2 DOUT J401-45 3 LOCK_DET* U702-K2 4 SBI J401-22 5 BAT_STATUS U701-28 6 GROUND N/C 7 DA_SEL* U701-68 8 ROSC/PSC_CE* U701-59 9 SYN_SEL* U701-62 10 SPL_SCK U701-67 11 OD - 24MHZ U701-43 12 POR* U726-1 13 GROUND N/C 14 MODIN J401-35 15 UNSW_B+ Q1-2, 3 16 GROUND N/C 17 MOSI U701-66 18 SW_B+ Q106-5 19 GROUND N/C 20 UNSW_B+ Q106-2, 3 P301 Controller Board to Display Modul
Notes 12-4
