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NiCom NT3K, Service Manual

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NT3K - NT5K

MEDIUM/HIGH POWER

FM BROADCAST TRANSMITTER

SERVICE MANUAL

Summary of Contents for NT3K

Page 1: ...NT3K NT5K MEDIUM HIGH POWER FM BROADCAST TRANSMITTER SERVICE MANUAL...

Page 2: ...R STAGE SUPPLY CORRECT OPERATION YELLOWINDICATOR 3 PLL LOCK FREQUENCY CONTROL CORRECT OPERATION CIRCUIT GREEN INDICATOR 4 PRESENCE OF RF POWER AT FREQUENCY SET ON OUTPUT CONNECTOR GREEN INDICATOR 5 RF...

Page 3: ...TH GROUND CONNECTING 5 DB 9 PIN INPUT OUTPUT CONNECTOR FOR TELEMETRY opt 01 6 7 BNC FEMALES FOR SUBCARRIERS GENERATORS INPUTS 8 9 SCA INPUTADJUSTING LEVELS 10 11 COUPLE BNC FEMALE BALANCED MODE MONO A...

Page 4: ...able to operate properly even under severe conditions they should not be considered as normal and therefore cannot be applied neither permanently nor for long periods of time The equipment has been de...

Page 5: ...ld operate are intended as minimum figures sufficient to keep the internal parts of the equipment perfectly cooled In case there should be more equipment in the same transmitter enclosure room it will...

Page 6: ...sons the equipment should come in contact with water or other liquids To clean the equipment use only a soft cloth In cases where a lot of dust accumulates inside the equipment use a vacuum cleaner or...

Page 7: ...ding system grants the personal safety of the technical personnel in case of stray currents due to static voltages accumulated in the equipment Before proceeding to any operations we strongly recommen...

Page 8: ...this you can now put the unit in operation Turn on the main switch and allow the unit to cycle till the enable light is on This means that the unit is ready to deliver power We recommend to test the u...

Page 9: ...es to allow all the parts to warm up and to verify that in antenna the performances are almost the same that on the Load After that time and after verifying that the reflected power is ok you can incr...

Page 10: ...nts where applicable are found throughout this manual Note that warning and caution statements and or symbols are marked on the equipment as well This manual provides technical information important f...

Page 11: ...truction of equipment or other property Warning Used to indicate a potential hazard that requires correct procedures or practices in order to prevent personal injury Impaired Safety Protection Technic...

Page 12: ...nd secured against unintended operation The appropriate servicing authority must be informed For example safety is likely to be impaired if the equipment fails to perform the intended measurements or...

Page 13: ...or more High voltage 1000 V Black Yellow Live part shock risk of electric shock Black Yellow To preserve the instrument from damage the operator must refer to an explanation in the instruction manual...

Page 14: ...ing conductor of the power cord To avoid electrical shock plug the power cord into a properly wired socket before connecting to the product in put or output terminals Upon loss of the protective groun...

Page 15: ...the affected por tion of the equipment After power is removed allow sufficient time for the power supplies to bleed down before reinserting PCBs When troubleshooting remember that FETs and other meta...

Page 16: ...e of the power Carefully avoid touching him or his clothing until free of power Emergency resuscitation Technique Step 1 Check the victim for unresponsiveness If there is no response immediately call...

Page 17: ...ure move on to the next step Step 5 Position your hands in the center of the chest between the nipples Place one hand on top of the other Step 6 Push down firmly two inches Push on chest 15 times CONT...

Page 18: ...red part since there is a tendency to chill Splint all fractures Violent muscle contractions caused by the electricity may result in fractures Never permit burned surfaces to be in contact with each o...

Page 19: ...NICOM NT5K OPERATING INSTRUCTIONS...

Page 20: ...y will show After 3 seconds the green PLL LOCK led will light and the Display will show an increasing bar after a further 5 seconds the green ON AIR led will light and there will be output power At th...

Page 21: ...at the required digit and press the SET key to confirm the digit Carry out the same operation for the two remaining digits If the password is correct press SET key to confirm otherwise press SELECT ke...

Page 22: ...requency press the SET key For changing the password proceed at the same method for the required password The confirmation password will be required If the password is correct the display will show NE...

Page 23: ...d should you wish to Display Change of Frequency Press the SELECT key for 3 seconds and input the correct password at this point press the SELECT key again Press the SELECT key to change the digit and...

Page 24: ...s followed by the WAIT cycle and after this the display will show the following parameters After 7 minutes the display light switches off and the display will show MOD PW 4550W PR 4W SELECT SET NICOM...

Page 25: ...lock FRW RFL TEMP MOD DB 9 TELEMETRY CONNECTION REAR VIEW REAR VIEW NT LCD Series Transmitters Pin Description 1 2 Forward Power 3 Reflected Power 4 5 Modulation 6 9 GROUND Interlock to ground Tempera...

Page 26: ...NT5000 TOP VIEW...

Page 27: ...NT5000 BOTTOM VIEW...

Page 28: ...NT5000 FRONT PANEL ON NT5000 SLIDE IN OUT POWER SUPPLIES...

Page 29: ...WARD RF INPUT RF OUTPUT GND 48 2 REFLECTED 48V 3 48V 4 48V 5 48V 6 20W RF AMPLIFIER 15V GND RF IN RF OUT ESVA BOARD MPX GND MPX MONO GND MONO MONO SCA1 GND SCA1 Interlock GND Interlock SCA2 GND SCA2 S...

Page 30: ...F ADJ B ADJ A SW1 SW2 SW1 LED LOCK SW1 SW2 DB9_RFL DB9_RFL INTERLOCK 24V ADJ A 24V LED RF 5V FWD PW V ADJ 5V IN FWD PW 24V ADJ C ADJ B 5V ADJ A DB9_FWD IN RFL PW IN FWD PW ADJ C 24V DB9_FWD V GATE FWD...

Page 31: ...24 33 R12 1K R8 47K R44 10K R22 1K R27 1K C42 6 8nF J15 DJ3 C40 4 7nF C31 1000MF 25V C26 60pF R20 1K FILT1 FILTER 19KHz 1 2 3 4 5 6 7 8 R17 3K9 R15 1K2 D4 BAT43 R46 3K9 D3 BAT43 U3B LF353 5 6 7 R45 3K...

Page 32: ...26 27 28 29 30 31 32 33 36 37 38 39 40 41 42 43 35 22 23 1 12 34 44 P1 0 P1 1 P1 2 P1 3 P1 4 P1 5 P1 6 P1 7 RST RxD TxD INT0 INT1 T0 T1 WR RT XTAL2 XTAL1 P2 0 P2 1 P2 2 P2 3 P2 4 P2 5 P2 6 P2 7 PSEN A...

Page 33: ...106 5 6 U20B 40106 3 4 C85 0 1MF C86 22MF 16V C87 0 1MF R78 33 D10 LED D12 MRA4007 D13 MRA4007 C71 0 1MF R75 33 D15 LED C70 22MF 16V R80 1K2 C72 0 1MF D33 MRA4007 U10 LM7915 2 1 3 IN GND OUT C161 47MF...

Page 34: ...A LM358 3 2 1 8 4 U19B LM358 5 6 7 C92 0 1MF R205 47K Q16 BC327 R204 27K R99 100 R181 4K7 R186 4K7 R197 470K R184 10K C167 1nF C104 10MF 35V U14A LM358 3 2 1 8 4 R85 47K R182 470K R194 2K2 R188 47K Q7...

Page 35: ...1nF R169 12 C143 0 1MF R166 3K9 R165 10K C149 NC L20 18T 0 4D R168 390 R176 12 C157 22pF C147 4 7nF L21 3T 6D C148 33pF R171 330 L22 3T 6D C150 10pF Q13 BFR96 C153 0 1MF L23 2T 6D C151 1nF R178 56 C1...

Page 36: ...K C109 1000MF 16V C106 1000MF 16V D22 MV209 COAX1 RG178 D24 MV209 D20 MV209 L19 22 H R134 180 D21 MV209 D26 MV209 R131 6K8 C116 100pF C121 47MF 16V R132 47K R128 330 R123 47 Q8 J310 Q9 J310 C112 0 1MF...

Page 37: ...4 180 C135 1000MF 16V C127 0 1MF R155 470 R143 560 C134 470MF 25V TCXO1 MHz 12 800 1 7 8 14 N C GND OUT Vcc C128 22MF 16V C133 0 1MF C137 220MF 16V C130 2 2MF 50V R147 3K9 R137 100 U18B LM358 5 6 7 C1...

Page 38: ...eramic Capacitor C24 1nF SMD Multilayer Ceramic Capacitor C25 1nF SMD Multilayer Ceramic Capacitor C26 60pF Trimmer Polyethylene Film Capacitor C27 10pF SMD Multilayer Ceramic Capacitor C28 22pF SMD M...

Page 39: ...MD Aluminium Electrolytic Capacitor C74 0 1MF SMD Multilayer Ceramic Capacitor C75 0 1MF SMD Multilayer Ceramic Capacitor C76 47MF 35V Aluminium Electrolytic Capacitor C77 0 1MF SMD Multilayer Ceramic...

Page 40: ...apacitor C125 22MF 16V SMD Aluminium Electrolytic Capacitor C126 0 1MF SMD Multilayer Ceramic Capacitor C127 0 1MF SMD Multilayer Ceramic Capacitor C128 22MF 16V SMD Aluminium Electrolytic Capacitor C...

Page 41: ...22uH SMD Inductor L6 22uH SMD Inductor L7 22uH SMD Inductor L8 22uH SMD Inductor L9 22uH SMD Inductor L10 22uH SMD Inductor L11 22uH SMD Inductor L12 22uH Suppression Choke L13 4 7mH Suppression Chok...

Page 42: ...ilm Resistor R33 33 1 4W SMD Thick Film Resistor R34 NC 1 4W SMD Thick Film Resistor R35 560K 1 4W SMD Thick Film Resistor R36 10K 1 4W SMD Thick Film Resistor R37 4K7 1 4W SMD Thick Film Resistor R38...

Page 43: ...2K2 1 4W SMD Thick Film Resistor R88 1K2 1 4W SMD Thick Film Resistor R89 10 1 4W SMD Thick Film Resistor R90 10 1 4W SMD Thick Film Resistor R91 1K 1 4W SMD Thick Film Resistor R92 4K7 1 4W SMD Thic...

Page 44: ...39 330 1 4W SMD Thick Film Resistor R140 4K7 1 4W SMD Thick Film Resistor R141 2K7 1 4W SMD Thick Film Resistor R142 100 1 4W SMD Thick Film Resistor R143 560 1 4W SMD Thick Film Resistor R144 180 1 4...

Page 45: ...SMD Thick Film Resistor R190 2K2 1 4W SMD Thick Film Resistor R191 1K 1 4W SMD Thick Film Resistor R192 1K5 1 4W SMD Thick Film Resistor R193 2K2 1 4W SMD Thick Film Resistor R194 2K2 1 4W SMD Thick...

Page 46: ...istor Q2 BC327 Low Power Bipolar Transistor Q3 BC337 Low Power Bipolar Transistor Q4 BC327 Low Power Bipolar Transistor Q5 BC337 Low Power Bipolar Transistor Q6 BDX53 Medium Power Bipolar Transistor Q...

Page 47: ...J3 DJ2x5 Male PCB Mounting Header J4 NC J5 STEREO PCB Pin Strip Header J6 NC J7 DJ3 PCB Pin Strip Header J8 NC J9 NC J10 NC J11 NC J12 DB9_AUX PCB Pin Strip Header J13 DB9 Male PCB Mounting Header J14...

Page 48: ...NICOM Rif Value Remarks Description Code J36 15V Jumper for setting J37 DJ2 Jumper for setting J38 DJ2 Jumper for setting...

Page 49: ......

Page 50: ...10K C10 1nF MLIN3 R8 33 R2 27K Q1 PD55025 C5 100MF 50V C6 0 1MF C11 470pF L4 T4 W 6 D6 C23 39pF CL1 TREE COUPLED LINE C20 10pF D1 BA481 R9 150 D2 BA481 C28 1nF C24 39pF C29 0 1MF C9 1nF L2 T3 W 6 D6 L...

Page 51: ...ic Disc Capacitor NPO C21 39pF Ceramic Disc Capacitor NPO C22 39pF Ceramic Disc Capacitor NPO C23 39pF Ceramic Disc Capacitor NPO C24 39pF Ceramic Disc Capacitor NPO C25 10pF Ceramic Disc Capacitor NP...

Page 52: ......

Page 53: ...4 100nF C5 2 2MF 35V C3 10MF 35V R2 10K Q2 BC337 R5 1K R4 10K C2 100nF Q1 BC327 R1 1K R7 10K R8 10K C1 10MF 35V TERM3 Base TIP41 TERM4 RF ADJ R6 1K TERM1 15V R16 10K U1B LM358 5 6 7 R18 10K TERM2 GND...

Page 54: ...R5 1K 1 4W Metal Film Resistor R6 1K 1 4W Metal Film Resistor R7 10K 1 4W Metal Film Resistor R8 10K 1 4W Metal Film Resistor R9 10K 1 4W Cermet Skeleton Trimmer Resistor R10 10K 1 4W Metal Film Resis...

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Page 61: ...ECTED RF OUTPUT FORWARD RF TEST RF MODULE RF INPUT 48 1 48 2 RF OUTPUT 48 3 48V 4 48V 5 48V 6 GATE TERM1 48V 1 TERM2 48V 2 TERM10 RF INPUT TERM12 GATE TERM5 FORWARD TERM7 REFLECTED C1 1nF TERM11 RF TE...

Page 62: ...RF INPUT RF OUTPUT GND RF MODULE 48V GATE RF INPUT RF OUTPUT GND RF MODULE 48V GATE RF INPUT RF OUTPUT GND COMBINER 2 WAY RF INPUT 1 RF OUT RF INPUT 2 RF MODULE 48V GATE RF INPUT RF OUTPUT GND RF MODU...

Page 63: ...FMAMPL5KW 1 0 SPLITTER 3 WAY A 3 8 Thursday July 03 2014 Title Size Document Number Rev Date Sheet of N COM MLIN1 LINE MLIN2 LINE MLIN3 LINE R1 NC R2 NC R3 NC RF INPUT RF OUTPUT 2 RF OUTPUT 1 RF OUTPU...

Page 64: ...Mod FMAMPL5KW 1 0 SPLITTER 2 WAY A 4 8 Thursday July 03 2014 Title Size Document Number Rev Date Sheet of N COM R4 100 2W MLIN5 LINE MLIN4 LINE RF INPUT RF OUTPUT 2 RF OUTPUT 1...

Page 65: ...1nF R5 3K3 1W C33 1nF R14 1K5 C24 27pF R10 8K2 D2 LL4148 C21 1nF C27 1nF C26 1nF R13 39 1W TR4 1 1 R15 100 C16 1nF TR1 1 1 C23 1nF C28 1nF R11 100 C17 1nF TR3 1 1 C18 1nF C31 1nF C30 1nF C29 1nF TR2...

Page 66: ...INER 2 WAY A 6 8 Thursday July 03 2014 Title Size Document Number Rev Date Sheet of N COM C35 8 2pF C38 6 8pF C34 6 8pF L3 T5 D10 W2 5 L4 T5 D10 W2 5 C39 8 2pF R17 100 250W C37 15pF C36 15pF RF INPUT...

Page 67: ...W 1 0 COMBINER 3 WAY A 7 8 Thursday July 03 2014 Title Size Document Number Rev Date Sheet of N COM MLIN8 LINE MLIN7 LINE MLIN6 LINE R19 50 250W R20 50 250W R18 50 250W RF INPUT 1 RF OUTPUT RF INPUT 3...

Page 68: ...e Document Number Rev Date Sheet of N COM R21 0 C40 27pF C43 uCAP C46 uCAP C44 uCAP R27 0 L6 LINE L5 LINE CL1 TREE COUPLED LINE C45 uCAP C41 1nF R24 330 C48 1nF R22 15K R23 200 C42 uCAP R26 47 D5 BAT4...

Page 69: ...ic ATC Capacitor C19 1nF SMD Ceramic ATC Capacitor C20 1nF SMD Ceramic ATC Capacitor C21 1nF SMD Ceramic ATC Capacitor C22 1nF SMD Ceramic ATC Capacitor C23 1nF SMD Ceramic ATC Capacitor C24 27pF SMD...

Page 70: ...m Resistor R17 100 250W Ceramic Cased RF Resistor R18 50 250W Ceramic Cased RF Resistor R19 50 250W Ceramic Cased RF Resistor R20 50 250W Ceramic Cased RF Resistor R21 0 1 4W SMD Thick Film Resistor R...

Page 71: ...316 COAX9 RG316 Coaxial Cable RG316 COAX10 RG316 Coaxial Cable RG316 COAX11 UT141 Coaxial Cable UT141 COAX12 UT141 Coaxial Cable UT141 COAX13 UT141 Coaxial Cable UT141 COAX14 UT141 Coaxial Cable UT141...

Page 72: ......

Page 73: ...6 10K R23 2K R30 10K C5 100nF R15 10K C14 100nF C18 100nF TERM2 GND R19 0 R10 1K5 U1 U2 U3 U4 T1 T2 T3 T4 S1 S2 S3 S4 R1 R2 R3 R4 P1 P2 P3 CONN2 CONN POWER ONE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 U...

Page 74: ...18 100nF SMD Multilayer Ceramic Capacitor R1 4K7 SMD Thick Film Resistor R2 4K7 SMD Thick Film Resistor R3 4K7 SMD Thick Film Resistor R4 4K7 SMD Thick Film Resistor R5 330 SMD Thick Film Resistor R6...

Page 75: ...ed Diode Q1 2N7002 SMD Low Power Bipolar Transistor Q2 2N7002 SMD Low Power Bipolar Transistor U1 LM78L05 SMD Fixed Voltage Regulator U2 PIC16F1827 Microprocessor U3 LTC1485 Special Function Integrate...

Page 76: ......

Page 77: ...ocument Number Rev Date Sheet of N COM GND ADJ C GND LED PW LED LOCK LED RF ADJ B ADJ A SW1 LED PW GND GND LED LOCK LED RF GND ADJ A ADJ C ADJ B SW1 SW1 GND GND SW2 SW2 GND GND SW2 D1 POWER D2 LOCK D3...

Page 78: ...ription Code D1 POWER Light Emitting Diode D2 LOCK Light Emitting Diode D3 ON AIR Light Emitting Diode J1 DJ2x5 Male PCB Mounting Header R1 POT Multi Turn Cermet Trimmer Resistor Panel Mount SW1 SELEC...

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