Tokyo Hy Power Labs HL-25KFX High Power Amplifier User Manual users manual

Tokyo Hy-Power Labs, Inc. High Power Amplifier users manual

users manual

 INSTRUCTION MANUAL             HF LINEAR POWER AMPLIFIER  MODEL : HL-2.5KFX
1 1.  Introduction  Thank  you  for  purchasing  the  HL-2.5KFX.  This  compact  and  lightweight desktop HF linear power amplifier has a maximum input power of 2.9 kW. Our solid-state broadband power amp technology makes it the smallest and lightest in the industry. Typical output power is 1.5 kW PEP/SSB with the drive power of 85-90 W. The built-in band decoder will let you forget about the band setting when the amplifier is connected to your modern radio through such band data cables as ICOM CI-V, DC voltage (ICOM, Yaesu), and RS-232C (Kenwood). All the data  cables are included in your amplifier for your convenience.  2.  Cautions  2-1  Unpack the amplifier, check the fan guard at the rear panel Fan to see if there is any damage caused by the physical shock during the transportation. Fan blades must be free to rotate when powered. The amplifier is cooled by forced airflow. Several inches of clearance on the top and the rear wall are necessary to allow for smooth air intake into the fan. Do not block the air vents on the top cover.  2-2  Keep the amplifier out of direct sunlight, in a cool dry environment.  2-3  Internal high  voltages, (AC, DC and RF), are present at all times, ON AIR or OFF. Internal access should be limited to avoid injury.  2-4  Turn  off  the  AC  main  power  immediately  upon  any  unusual  sounds, sights or odors. Check the multimeter readings of Vd and Id, the fuses and all cable connections around the amplifier. Please notify the dealer or the factory of any problems.  2-5  For your safety, do not operate the amplifier without adequate grounding. A  proper  ground  connection  will  result  in  peak  performance  and  stability,  in addition to reduced RF strays or noises.  2-6  To eliminate the RF interference to such home  appliances as TV, FM radio,  telephone  sets,  etc.,  it  is  recommended  that  clamp-on  ferrite  cores  be
2 inserted at both ends of the remote control cable, ALC cable, coaxial jumper cable, and antenna cables, as needed. Also, a common mode AC line filter (near the  AC  outlet), and  in-line  low  pass  filters  on  the  antenna  coaxial  cable,  (as necessary), are recommended.  2-7  The amplifier has fast acting sophisticated protection circuits controlled by the latest microprocessor technology. Please note, however, any such actions that cause the same fault to occur repeatedly, will lead to failure of the valuable final power FET transistors. Also note that the full power CW (or carrier) drive under the erroneous MANUAL BAND SET leads to the failure of the final power FET’s  (See  page  11,  Section  7.  Connection).  In  this  sense,  it  is  highly recommended  that the amplifier is connected to the radio with supplied Band Data Cable.  2-8  Before checking inside the amplifier, be sure to wait a few minutes for the  high  DC  voltage  to  discharge  (monitor  Vd  meter  reading).  The  internal potentiometers  for  RF  power  detector,  protection  circuits,  FET  bias  voltage circuit,  etc.,  are  precisely  adjusted  at  the  factory,  and  should  not  be  altered. Doing so, would require readjustment with precision measuring instruments.  2-9  The  primary  power  transformer  is  factory  pre-wired  for  AC 240 V operation. (See page6, Section 5. AC Line Voltage) Be sure to verify your AC line voltage before you plug the AC power cord into the outlet.  2-10  Before powering on the amplifier, be sure to connect a dummy load (50 ohms, 1.5 kW min.) or a well-adjusted antenna to the output terminal. Operating without  any  load  will  cause  extreme  stress  to  the  RF  power  FET’s,  although protection circuits should work under critical conditions.  2-11  Required drive power is slightly less than 100 W to obtain the full 1.5 kW output.  Do  not  attempt  to  operate  with  excessive  drive  from  a  high  power transceiver. Transmitting high drive RF (over 100 W) into the amplifier will void the warranty.  2-12  Keep  the  aluminum  heat  sink  and  air  openings  free  from  dust  and blockages. Periodic cleaning will prevent degraded cooling efficiency.
3 2-13  For long continuous operation in RTTY/FM modes, it is recommended you  reduce  the  RF  drive  levels  by  20%  to  30%  lower  output  than  CW/SSB modes.  2-14  To  prevent  damage  to  the  precision  electronic  components,  avoid extreme physical shock  to  the  amplifier.  If  factory  service  is  required,  the amplifier MUST be shipped using the original box and packaging materials.   3.  Features    3-1  Our  solid-state  broadband  design  engineers  worked  to  make  the HL-2.5KFX, the lightest and most compact 1.5 kW HF amplifier in the industry. This  world-class  compact 1.5  kW  HF  amplifier  is  the  easiest  to  handle  and operate.  3-2  The amplifier is equipped with a newly developed band decoder. The amplifier’s decoder changes bands automatically as the data signal is received from the associated HF transceiver’s frequency bands.    3-3  The  amplifier’s  main  PA  section  includes  2  high  power  MOS  FET ARF1500’s by Microsemi, resulting in 1.5 kW PEP (SSB max.). The amplifier’s broadband characteristics require no further tuning once the operating band is selected.  3-4  The amplifier allows operation in full break-in CW mode due to the use of the amplifier’s high- speed antenna relays (made by Panasonic/Matsushita).  3-5  With the unique duct structure design and the powerful blower fan, the aluminum  heat  sink  block  for  RF  PA  module  (and  other  components),  are effectively  cooled.  The  fan’s  quiet  operation  allows  for  even  the  weakest  DX signals to be heard.  3-6  The amp utilizes an advanced 16 bit MPU (microprocessor) to run the various high speed protection circuits such as overdrive, high antenna SWR, DC overvoltage, band miss-set etc.
4 3-7  This amplifier is compatible with AC 220 V and 240 V (200/230/250 V included).  See  the  illustration  in  the  AC  Power  Section  for  changing  primary wiring of the power transformer.  3-8  For the safety of the operator, an Interlock system is employed. The AC power  is  shut  down  if  the  top  cover  is  removed,  and  the  automated  safety interlock is activated.  3-9  An  analog  multimeter  allows  the  operator  to  monitor  Pr  (Reflected power), Vd (Drain voltage of power FET), Id (Drain current) and ALC voltage.  3-10  For future expansion, the amplifier rear panel is equipped with a control cable  connection  socket,  this  is  for  the  upcoming  model  HC-1.5KAT,  auto antenna tuner by Tokyo Hy-Power Labs. in 2007.
5 4.  Specifications  Frequency  :  1.8 ~ 28 MHz all amateur bands including WARC     bands Mode  :  SSB, CW, RTTY RF Drive  :  85W typ. (100W max.) Output Power  :  1.5 kW PEP/CW (typ.) (1.2 kW on 28 MHz band) Matching Transceivers for Auto Band Decoder  :     Most ICOM, Yaesu, Kenwood Drain Voltage  :  120 V (when no RF drive) Drain Current  :  25 A max. Input Impedance  :  50Ω (unbalanced) Output Impedance  :  50Ω (unbalanced) Final Transistor  :  ARF1500 x 2 (MOS FET by Microsemi) Circuit  :  Class AB push-pull Cooling Method  :  Forced Air Cooling MPU  :  PIC 18F452-I/P Multi-Meter  :  Output Power  Pf 2.5 kW Reflected Power  Pr 250W Drain Voltage Vd  150V Drain Current  Id 40A Input/Output Connectors :  UHF SO-239 with low loss Teflon insulator AC Power  :  AC 240 V (200/220/230/250 V) 15A max. AC Consumption  :  3 kVA max. when TX Dimension  :  325 x 145 x 405 mm (W x H x D) 12.3 x 5.7 x 15.9 inches Weight  :  Approx. 25.2 kgs. or 57.3 lbs. Accessories  :  AC Power Cord  x 1 RCA Plug  x 2   Band Decoder Cable  x 3 Spare Fuse  12 A (for AC 230V line) x 2 Spare Fuse  1A (Miniature Fuse)  x 3 User Manual x 1 Optional Items  :  Auto Antenna Tuner (HC-1.5KAT) High Power Cooling Fan (HXT-2.5KF for high duty cycle operation)
6 5.  AC Line Voltage  5-1  The amplifier is designed to work with AC 240 V (200- 250 V).    5-2  The correct  AC  plug  (not included in the package), must  be  obtained locally due to the AC plug variations worldwide.  5-3  The AC voltage has been factory preset for 240 V use (or as requested by the customer at the time of order). See the other illustration for AC voltages other than 240 V. For your safety, before making these adjustments, be sure to pull the AC plug from the AC outlet to avoid injury. AC Line Tap 1 Tap 2200V (195V-205V) 0 V 200 V210V (205V-215V) 10 V 220 V220V (215V-225V) 0 V 220 V230V (225V-235V) 10 V 240 V240V (235V-245V) 0 V 240 V250V (245V-255V) 0 V 250 VGuide for Tap Selection T1 (Main Power Transformer)250V240V220V200V10VAC-NTap 10VAC-L Tap 2       10VSecondaryWinding 250V240V240V240V240V240V240V220V220V220V220V220V220V200V200V200V200V200V200V10V10V10V10V10V10V0V0V0V0V0V0VTerminal Board ConnectionAC200VAC210VAC220VAC230VAC240VAC250V
7 6-A  Front Panel Description                 ①POWER  Main power switch to turn AC power on and off.   LED (green) lights when turned on. ②OPER.  OPERATE/STAND-BY switch. At OPERATE, the amplifier is ready  to  go  into  ON  AIR  (TX)  mode  and  at  STBY,  it  is  on STAND-BY mode. ③METER  To change the multimeter scales. Meter reads Pr, Vd, and Id, and ALC. ④BAND-AUTO/MAN’L  To select band switching methods AUTO or MANUAL. When using  AUTO,  the manufacturer for the  transceiver  in  use should be selected. When the band data cable is not used, MANUAL should be selected. (See page 9,  ⑤TRXSEL and ③CONT for Band Data cable Connection) ⑤BAND-MAN’L  Rotary  switch  for  band  change  in  manual  mode.  While  the transceiver  is  on  Receive  (RX)  mode,  turn  to  select  the desired frequency band to operate. The switches will not work when the transceiver and the amplifier are in Transmit (TX) mode.   ⑥METER(PF)  Meter to read forward output power, PF. Full scale is 2.5 kW, and it reads average power. ①②③④⑤⑨⑥⑦ ⑧
8 ⑦MULTIMETER  PR(Reflected power from antenna), VD (FET drain voltage), and ID(FET drain current) and ALC voltage are shown on the scale as selected by  ③METER select switch.  Full scales are; PR:250 W, VD: 150 V, ID: 40 A, ALC: -10V. ⑧ON AIR, FAN, ID, PROT(LED) ON AIR  :  Lights when the amplifier is in transmit(TX) mode. FAN  :  Lights when cooling fan is running at high speed.  When the heat sink temperature reaches 40℃, cooling fan speed  will  continuously  increase  to  enhance  cooling capacity. It runs at full speed when 65℃  is reached. ID  :  Excessive ID Indicator (25 A). Depending on the band and antenna situation, high drain current may flow into FET’s. If 25 A is exceeded, this LED flickers and/or lights to indicate that high ID is being drawn (This light does not necessarily mean a failure of the amplifier. However, if it lights too often, or too long, it is possible the driver power should be reduced and  the  antenna  should  be  checked  for  SWR,  to  avoid stress to the FET’s.). PROT  :  Lights  when  protection  circuit  shuts  down  the  amplifier. Various protection  circuits  are  built  in  such  as  Over-drive, Band  mis-set,  high  Ant-SWR,  Over-temperature  etc. Detailed explanations will follow.              ⑨LCD Panel  Displays modes of operation and protection circuit.  Band  Band Change Mode CI-V (example) *YSU is displayed for Yaesu radio, and KEN for Kenwood’s. Amp. Status  Heat Sink Temp.
9 6-B  Rear Panel Description                  ①ANT A  RF Output Connector. Connect the coax cable to the antenna. ②INPUT  RF  Input Connector. Connect the coax  jumper cable from the transceiver. ③CONT  D-Sub  (15pin)  Socket.  Connect  the  band  data  cable  to  the transceiver. ④TUNER  DIN  Socket.  Connect  the  control  cable  from  External  Auto Antenna Tuner, HC-1.5KAT. ⑤TRXSEL  Switch to select the transceiver manufacturer (i.e. ICOM, Yaesu, Kenwood). ⑥GND Ground Terminal. ⑦⑧FUSE  A pair of fuses for AC Mains. 250 V/12 A glass fuse.   (Self extinguish type.) ⑨AC POWER  230 V AC Mains Socket. Socket for the AC power cord. (Socket is EMI filtered.) ⑩ALC ADJ.  Potentiometer  to  adjust  ALC  voltage  level.  Minus  10  V  is available  at  maximum,  when  turned  full  counter-clockwise. Factory setting is 0 volts, with the pot turned full clockwise.   (See page 16, Section 9. ALC Connection for more details.) ⑪SEND  RCA Jack. Connect the control cable from the ACC terminal (or ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑬ ⑫ ⑪ ⑩
10 SEND,  TX  GND  etc.)  of  the  transceiver.  Electrical  conditions are 12 V DC of open voltage at receive mode (RX), and short current of 35 mA at transmit mode (TX). ⑫ALC  RCA  Jack  for  ALC  Voltage  Output.  Negative  DC  voltage appears at the center pin, which is fed back to the ALC terminal of  the  transceiver.  ALC  is  used  to  keep  the  amplifier  output power  at  certain limits.  Also  it  is  useful  when  the  transceiver output power is higher than 100 W (See page 16, Section 9. ALC Connection).  Also  consult  your  HF  transceiver€31s  user manual. ⑬FAN POWER Socket to connect DC cord plug of the cooling fan.   6-C  Top View   Front Panel SideInterlockSwitchfor AC MainsCooling FanOutput Low Pass FilterTerminal forPrimary Winding TapsPower TransformerRectifierRF PowerAmpand Heat SInk
11 HC-1.5KAT Control Cable230 V AC CordALC CablePTT Cable          HL-2.5KFX    Coax Jumper Cable          Band Data Cable          Transceiver          SEND/     ALC STBY  ANT◎  ◎  ◎    ◎7.  Connection  7-1  Connection to Transceiver and Tuner                    Display/connector nameCable sideConnectorAC200V ①AC200L AC Power CordIEC3P Inlet ②GND 200V 20A③AC200NALC Transceiver RF output (-) recitificationRCA-J ALC socket -10V max.SEND Transceiver Short at TXRCA-J PTT relay Open at RX12V 40mATUNER Tuning Control Auto Tuner Band tracking signalDIN7J ②GND④EVENT HC-1.5KAT⑦FREQCONT socketINUHF(SO239)OUTUHF(SO-239)CONTSee Section 10. for detailsD-SUB15RD-SUB15PSignal To: DescriptionCoax Antenna CableIEC3P AC230V consentRCA-P ALC OutputRCA-P PTT InputDIN7PPL259HL-2.5KFX sideBand DataConnector and Cable ListBand data terminalof transceiverAntenna or TunerInputANT of Transceiver Coax CableTRXPL259 Antenna
12 7-2  Technical Information  Equivalent Circuit of SEND Terminal                   Equivalent  Circuit  of  ALC  Output
13 8.  Operation  ***CAUTION: Under the Manual Band Set operation, always be sure to check if BAND Switch position matches that of your radio before keying PTT or the CW paddle. Also when you have changed the BAND, do not make the full power CW (carrier) drive but reduced level power to see if the BAND is set correctly and the amplified RF power comes out properly. Full power CW drive under the BAND Mis-set leads to the failure of the valuable final power FET devices. ***  8-1  Various Status There are four modes to be displayed on LCD.  ①  STBY (Standby Mode) This mode is for AC Power ON, and OPER. Switch at STBY position. Amplifier is in a through state.   ②  OPER (Operate) Mode This mode is for AC Power ON, and OPER switch at OPER. Position. Amplifier will work, if the transceiver is keyed.  ③  ONAIR (On Air) Mode This  is  for  amplifier  being  keyed under OPER. Mode. Amplifier  is  amplifying  or  ready  to amplify the drive signal.  ④  PROT (Protection) Mode Amplifier has been shut down by the protection circuit and  is  in  a  though state. See  page  19,  Section11.  Protection Circuits on how to reset.
14 8-2  How to Operate  8-2-1  Connect AC cord and coax cables as illustrated in Section 7 Connection. Connect the cable from “SEND” to ACC or the remote terminals of transceiver, where it is marked “SEND” or  “TX  GND”.  These  terminal pins are shorted to ground when the transceiver is in TX/ON AIR mode. If these connections are not made,  the amplifier will  not  go into TX (amplification) mode. For a temporary check to the amp, ground the SEND center pin by inserting an RCA plug whose center pin has been soldered to the outer case of the plug with a small piece of wire. As a side note, this SEND terminal shows 12 VDC when open, and draws 35 mA when shorted.    8-2-2 At first, turn the ALC knob full clockwise to avoid ALC  voltage to the transceiver. Application of ALC will be covered in the following Section 9.    8-2-3 Keeping the  POWER (AC mains)  switch off, check  the SWR of  your antenna by keying the transceiver to TX mode (CW or RTTY mode). Monitor the SWR with an external SWR/Power meter. If SWR is 1.8 or higher at band center, the antenna has to be adjusted for lower SWR.. As an alternative, an antenna tuner may be inserted.  8-2-4  While keeping OPER/STBY switch at STBY position, turn the POWER switch  on.  Turn  ④BAND  AUTO-MAN’L  switch  to  AUTO,  or  MAN’L(manual) position. If MAN’L is selected, turn BAND-MAN’L switch to desired band. See page 17, Section10. Band Data Cable Connection, for more details of various band data cables. Turn the STAND-BY switch to OPER (operate) position and the  amplifier  is  ready  to  go.  If  the  POWER  switch  is  turned  on,  while OPER/STBY switch is at OPER(operate) position, the orange OPER lamp will blink, and you will need to reset the OPER switch to enter into operation mode. “PSE STBY OPERSW is displayed at this time. If you key the transceiver with the  carrier  level  set  relatively  low  (such  as  20-30W),  you  will  achieve  an amplified output signal of a few hundreds watts. Monitor this output with the PF meter or with an external power meter. Increase drive level to roughly 50W and see  if  the  antenna  SWR  stays  constant.  (As  higher  RF  currents  flow  some antennas may show a changed SWR value due to heated connector junctions and trap coils.)
15 8-2-5  You  can  now  increase  the  drive  level  to  nearly  80-90W  to  achieve maximum carrier output power of 1.4 kW (CW, RTTY) from the amplifier. If you change to SSB mode, peak voice power will reach approximately 1.5 kW. For high  duty  cycle  transmissions  like  RTTY,  SSTV,  or  FM  modes,  it  is recommended you reduce the drive power by 20-30 % compared with SSB/CW.  8-2-6  With  a  high  power  transceiver  in  SSB  mode,  you  can  overdrive  the amplifier resulting in a distorted output signal. This can also occur if you speak too loud or if you set the microphone gain too high. Speak into the microphone properly to reduce the possibilities of splattering into the neighborhood. The ALC is  effective  in  preventing the output signal from being distorted or to limit  the carrier level to within rated output levels. As long as you do not overdrive, you can disregard the ALC connection. See page 15, Section 9. ALC Connection for details.  8-7-7  Protection  circuits  may  work  during  operation  depending  on  the conditions.  If  the  protection  circuit  has  shut  down  the  amplifier,  check  the antenna SWR, Vd, AC line voltage, or try to reduce the drive level. To reset, turn off  the  ②OPER/STBY  switch  once,  then  back  on  again.  Note  that  some protection modes need to reset the  ①POWER switch(See page19, Section 11. Protection & Safety Circuits  for  more  details).  The  power transformer  has an overheat protection(130℃) in the coil layer. If this temperature switch activates, the amplifier will put you in receive mode with the cooling fan operating until the transformer has cooled off. It may take ten to fifteen minutes to cool, depending upon  room  temperature.  In  the  same  way,  there  is  a  built-in  thermal  switch (100℃) in the heat sink block of power FET’s.   9. ALC Connection  ALC voltage is available at the terminal marked ALC (RCA phono jack) on the right upper corner of the rear panel. Negative maximum DC voltage of ten volts (-10 V) is produced at this terminal when the amplifier is fully driven. This voltage is adjustable with the ALC ADJ. knob located above the ALC jack. If the ALC voltage  is properly  fed  back  to  the  transceiver,  you  can keep  the maximum output power constant or hold the power at a certain level. Also ALC is useful in avoiding your SSB signal from being distorted when overdriven. You may not
16 always need to connect ALC to the transceiver, if you set the mic gain properly and do not overdrive the amplifier.  Depending upon the manufacturer of the transceiver, the suitable ALC voltage differs. ICOM may need 0~-4 V, and Yaesu may need 0~-5 V range.. Kenwood may need -6~-8 V maximum. Check your transceiver manual.  9-1  Prepare  an  ALC  control  cable  using  the  RCA  plug  supplied  in  the package. Solder a single wire or (more preferably) a shielded single wire to the center pin of RCA plug and solder the shield braid to the outer side of the plug. Connect  the  control  cable  to  the  “ALC  (or  EXTERNAL  ALC)”  jack  of  the transceiver. External ALC input is sometimes available at one of the pins of the “ACC” socket of the transceiver as well.  9-2  At first, turn ALC ADJ. full clockwise. Drive  the amplifier in CW/RTTY mode to full output power. Then turn the ALC ADJ counter-clockwise. Observe the SWR/Power meter at the output, (or Pf of the multimeter). Stop turning the ALC ADJ at the point  the power starts to decrease. Or if  you  wish  to further reduce the power, keep turning ALC ADJ until the desired level is achieved. If you further try to increase the drive power you will now see the output power become rather saturated, from these adjustments,   (Maximum ALC voltage produced is -10 V when the amplifier output is over 200 W.) <REAR PANEL>Max   Minto Transceiver
17 10. Band Data Cable Connection  This section explains about the methods of the auto band setting Collaboration with the modern transceivers of ICOM, Yaesu and Kenwood. To make this  setting, it is  needed that the band data  cable is connected to “CONT”  connector  as  well  as  selecting  “TRXSEL”  for  the  proper  radio manufacturer. Turn off AC powers of both the amplifier and the transceiver when you connect this data cable. Be sure to confirm the auto band set on each band, after you finish above settings.               10-1  ICOM DC Voltage Band Data ① HL-2.5KFX Setting TRXSEL:  “I” LCD:    “ICOM” Wiring:  Fig. A ②  Transceiver Setting None ②  Caution: This method fails to discriminate   24 and 28 MHZ of WARC bands.  Manual Band set Auto Band set/ CI-V ICOM-REGACY BAND DATAICM GICM3.5mm PHONE PLUGTRX ACC815714613512411310291<Fig. A>
18 10-2  ICOM CI-V ①  HL-2.5KFX Setting TRXSEL:  “C” LCD:    “CIV” Wiring:  Fig. B  ②  Transceiver Setting CI-V BAUD RATE:  9600 [bps] CI-V ADDRESS:  5 Ch CI-V Transceiver:  ON CI-V with IC-731:  OFF (See ICOM radio manual for the details.)  10-3  Yaesu Band Data ① HL-2.5KFX Setting TRXSEL:  “Y” LCD:    “YSU” Wiring:  Fig. C  ②  Transceiver Setting None    10-4  Kenwood RS-232C ① HL-2.5KFX Setting TRXSEL:  “K” LCD:    “KEN” Wiring:  Fig. D  ②  Transceiver Setting Speed:  9600 [bps] Stop bit:  1 bit (See Kenwood radio manual for   the details.)  3.5mm PHONE PLUGICOM CI-V DATA WIRINGTRX ACC815714613512411310291<Fig. B> <Fig. D> BAND-ABAND-BBAND-CBAND-DGNDYAESU BAND-DATATRX ACC815714613512411310291<Fig. C>
19 11. Protection & Safety Circuits  11-1  Protection Circuits HL-2.5KFX is equipped with ten protection circuits as shown in the table below. Protections  are  commanded  by the 16bit  microprocessor  chip,  and  DC  drain voltage (120 V) is cut off, when the protection circuit works. Also PROT lamp is lit and the amplifier becomes “through” state. If  PROT  lamp  is  blinking,  you  may  reset  the  shut  down  with  OPER/STBY switch.  Reason for the shut down is displayed on LCD panel except for some cases.    For OVER VDD and OVER TEMP shut downs, turn the AC Power switch off and on to reset the amplifier.  No. PROTECTION LCD DISPLAY CONDITION RESET REMARKS1 Over drive PROT OVER DRIV Drive exceeded 120 W *1OPER2 Band mis-set PROT BAND-MISS Amp gain is less than five times *1OPER Or when amp out oforder3 Over current PROT OVER ID ID (drain) exceeded 35 A *1OPER4 Freq. Inhibit PROT INHBT FREQ Driven freq-ranged 26 to28 MHz *1OPER FCC rule5 Over PFPROT OVER Pf Output power exceeded 1550 W *1OPER6 Over PRPROT OVER Pr Reflected power exceeded W *1OPER7 Over Dissipation PROT OVER Plos Drain power dissipation exceeded2000 W *1OPER Theoretical8 Over Tj PROT OVER Tj Functon temp. reached 190℃*1OPER Theoretical calculation9 Over voltage PROT OVER VDD Drain voltage exceeded 140 V *2AC POWER10 Over heat PROT OVER TEMP Heat sink temp reached 90℃*2AC POWER11 Fuse blown PROT FUSE-BLOW Fuse was blown(F1, F2 of Unit 10) Not resettable Check Fan ControlUnit, Unit 10*1: Reset OPER/STBY switch.*2: Reset AC main POWER switch. ←Example of LCD display (In this case, over drive)
20 11-2  Safety Circuits In  addition  to  the  protection  circuits  above,  there  are  other  safety  circuits (inter-locked circuits) built in the amplifier. They directly shut down AC power line for the primary of the power transformer, and if shut down, AC power lamp (green), LCD display and cooling fan will all go off. In case this shut down has  suddenly occurred during the transmission, stop transmitting first and wait for several minutes. Pull off AC power plug and check whether or not AC main fuses are blown.    Thermal Switches Threshold Heat Sink:    100  ℃ Power Transformer:  130  ℃  These shut-downs will automatically be relieved, when the internal heat cools off. Be sure to turn off AC power switch, before you leave the operation desk. Otherwise AC power will be turned on for itself right after the cooling.    130℃Main FuseMain FuseCover Switch12V SubDCPowerSupplyRelayAC200VAC200VHeat Sink X-formerPowerX-former100℃AC Power Relay
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