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QUANTUN QP-750 Service Manual

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QP-750 Service Manual
QP-750 Service Manual
Quantun Electronics， ， ， ， LLC
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Summary of Contents for QUANTUN QP-750

  • Page 1 QP-750 Service Manual QP-750 Service Manual Quantun Electronics， ， ， ， LLC - 1 -...
  • Page 2 QP-750 Service Manual Manual Scope This manual is intended for use by experienced technicians familiar with similar types of communication equipment. It contains all service information required for the equipment and is current as of the publication date. User Safety Information...

  • Page 3: Table Of Contents

    3.2.1 Attach PTT …………………………………………………………………………………… 3.2.2 Assemble the chassis and PCB…………………………………………………………………17 3.2.3 Attach the battery…………………………………………………………………………………17 Chapter 4 Mechanical View and Parts List………………………19 4.1 Exploded view………………………………………………………………………………19 4.1 QP-750 Part List……………………………………………………………………………20 Chapter 5 DC Power Distribution……………………....21 5.1 DC Regulation and Distribution……………………………………….….......21 - 3 -...
  • Page 4 QP-750 Service Manual Chapter 6 Controller Theory of Operation………………………23 6.1 Controller…………………………………………………………………………………..23 6.2 Microprocessor Circuitry………………………………………………………………….23 6.2.1 Memory Usage…………………………………………………………………………………..24 6.2.2 Control and Indicator Interface……………………………………………..…………………24 6.2.3 Interface to RSS Programming…………………………………………………………………24 6.2.4 Storage of Customer-Specific Information…………………………………….......24 6.2.5 Sensing of Externally-Connected Accessories……………………………......24 6.2.6 Microprocessor Power-Up, Power-Down and Reset Routine…………………....25 6.2.7 CPU PINs………………………………………………………………………………………….25...
  • Page 5 9.3.5 QP-750 AF Section……………………………………………………….………………..46 9.3.6 QP-750 Controller Section…………………………………………….………………… 47 9.4 QP-750 UHF PCB Layout………………………………………………..…………… 9.4.1 QP-750 UHF PCB Top layer view ………………………………………….…………… 48 9.4.2 QP-750 UHF PCB Top Chip Map………………………………………….………….…..49 9.4.3 QP-750 UHF PCB Bottom layer View……………………………………..………….…50 9.4.4 QP-750 UHF PCB Bottom Chip Map……………………………………………………...51 9.5 QP-750 (450-470MHz) Parts List…………………………………………………..…53...

  • Page 6: Chapter 1 Test Equipment, Service Aids, And Service Tool

    Service Aids Table 1-2 lists service aids recommended for working on the QP-750 Radios. While all of these items are available from Quantun, most are standard shop equipment items, and any equivalent item capable of the same performance may be substituted for the item listed.

  • Page 7: Model

    Li-Po battery 2100 mAh QS4501000000 Belt clip Antenna Whip 450-470 MHz QSAN0W410000 QC750100020 Programming cable kit with USB conector Programming cable kit with serial port QC750200010 SC1002 QP-750 Intelligent Charger – Base QSCHOM080010 only QBM102PCB Earphone with microphone/PTT - 7 -...

  • Page 8: Chapter 2 Realignment

    QP-750 Service Manual Chapter 2 Realignment Getting acquainted Antenna Channel Selector knob LED indicator Power/Volume Control Knob External Jack PTT Key SFK2 P rogrammable Key （ ） SFK1 （ P rogrammable Key ） P rogrammable Key （ ） - 8 -...

  • Page 9: Radio Modes

    QP-750 Service Manual Radio modes 2.2.1 User Mode This mode is for normal operation. 2.2.2 All Reset Mode Firstly ground the SELF point, and then turn the power on while holding down TFK key for 2 seconds. The radio enters all reset mode with green LED flashing twice. Turn the channel selector knob to the selected channel and press PTT, the green LED lights, then switch off the radio.

  • Page 10: Manual Adjust Mode

    QP-750 Service Manual 2.2.5 Manual Adjust Mode Manual adjustment is performed to adjust frequency deviation, power, sensitivity, squelch, etc. Note: Prior to entry for mode startup, select Manual Adjust Mode from optional functions in programming software. Manual Adjust Mode Description is as following:...

  • Page 11: Pc Adjust Mode

    QP-750 Service Manual (7) Frequency Setting 5 point tuning M Hz TX: { TX1,TX2,TX3,TX4,TX5} （ ） RX: { RX1,RX2,RX3,RX4,RX5} 3 point tuning M Hz TX: { TX1, TX3, TX5} （ ） RX: { RX1, RX3, RX5} 1 point tuning （...

  • Page 12: 2Adjustment

    QP-750 Service Manual 2.3.2 Adjustment Firstly reset the radio. Refer to All Reset Mode in ”Modes” for more details: VCO adjustment (1) Adjustment in user mode (2)Setting Power supply voltage: 7.4V Item Condition Measurement Adjustment Specification Test Terminal Parts Method Instrument 2.Transmit...
  • Page 13 QP-750 Service Manual 7. AK2346 Turn to CH7. Radio PTT key Transmit Audio Adjust at 3 point(wideband), Communicat SFK2 key 4KHz (25KHz), Deviation 1 point (medium band), ion Test Set 3.2KHz (20KHz) 1 point (narrow band). HPF: 20Hz 2KHz (12.5KHz d)
  • Page 14 QP-750 Service Manual 5. Squelch Level 9 Turn to CH5. Save Adjust level to 3 KHZ ： (OPEN) Adjust at 5 point (25KHz), -117dBm p ress PTT ， 1 point (20KHz) to save 1 point (12.5KHz) 6. Squelch Level 9 Turn to CH6.

  • Page 15: Chapter 3 Disassembly And Assembly

    QP-750 Service Manual Chapter 3 Disassembly and Assembly 3.1 Disassemble the radio 3.1.1 Remove the battery Turn off the radio if it is turned on. Disengage by pushing downward and holding the latch towards the front of the radio. With the battery latch disengaged, slide the battery down from the top of the radio about 12mm.

  • Page 16: Remove The Knob

    QP-750 Service Manual 3.1.3 Remove the knob. 3.1.4 Separate the chassis from PCB (1) Insert a open tool into the clearance between chassis and the case. (2) Push the tool downwards to separate the chassis from the case. (3) Lift the bottom of the chassis and pull it out of the PCB.

  • Page 17: Disassemble Ptt Key

    QP-750 Service Manual 3.1.6 Disassemble PTT key Push the tab on PTT out of the hole on the case to disassemble PTT key. - 17 -...

  • Page 18: Assemble The Radio

    QP-750 Service Manual 3.2 Assemble the radio 3.2.1 Attach PTT First insert the silica rubber PTT key form the inner of the radio house. （ ） Then press the down end of the PTT cover into the slot on the front case.

  • Page 19: Attach The Battery

    QP-750 Service Manual 3.2.3 Attach the battery: （ ） Align the battery to the battery rail on the back of the radio (approximately 12mm from the top of the radio.) Press the battery firmly to the radio and slide the battery upward until the latch snaps into （...

  • Page 20: Chapter 4 Mechanical View And Parts List

    QP-750 Service Manual Chapter 4 Mechanical View and Parts List Exploded view 3 1 3 2 3 3 3 4 3 5 3 6 2 7 2 8 2 9 - 20 -...

  • Page 21: Qp-750 Part List

    QP-750 Service Manual QP-750 Part List Material Name Specification P/N. 750 PTT key cover 5000900000 1.00 750 PTT Silica key 5100400010 1.00 QP750 Label 7603005000 1.00 Quantun Logo Label 7603006000 1.00 750 Knob Inner liner 5200000000 2.00 750 Channel Knob 5000200000 1.00...

  • Page 22: Dc Power Distribution

    QP-750 Service Manual Chapter 5 DC Power Distribution 5.1 DC Regulation and Distribution A block diagram of the DC power distribution throughout the radio is shown in Figure 5-1. M 5 V T 5 V T 5 C BATT FUSE...
  • Page 23 QP-750 Service Manual Table 5-1 Voltage Regulators Reference No Description Type IC2502 5CNS XC6201P502R IC2503 TK11250CM IC2507 XC6201P302R IC2504 XC6201P302R The 5 V (5CNS) source is applied to: Microphone bias circuitry • The 5 V (5CNS) source is also applied to switches Q2502 and Q2504. In transmit mode, T5C becomes low voltage and Q2502 is turned on to supply 5V (T5V) voltage for the transmit circuit.

  • Page 24: Qp-750 Service Manual

    QP-750 Service Manual Chapter 6 Controller Theory of Operation Controller The controller provides the following functions: • Serial bus control of major radio circuit blocks • Encoding and/or decoding of selective signaling formats such as CTCSS, CDCSS, MDC1200 and 2 Tone •...

  • Page 25: Memory Usage

    QP-750 Service Manual Circuit in this section is mainly comprised of MCU, EEPROM etc. MCU control circuit accomplishes the following functions: accomplish the reset initialization according to the programmed feature of the radio when power on; detect keying signal and monitor battery voltage;...

  • Page 26: Sensing Of Externally-Connected Accessories

    QP-750 Service Manual 6.2.5 Sensing of Externally-Connected Accessories Port P45 is used to detect the presence of externally connected accessories. Port P45 (IC2506 pin 47) is normally low, unless accessories (lapel speaker microphone, lightweight headset, etc.) are used with the radio. This port is used to detect an accessory PTT or auto sensing of a VOX accessory.
  • Page 27 QP-750 Service Manual RESET RESET Input low level to enter all reset mode XOUT XOUT Crystal oscillator output pin Crystal oscillator output pin P85/NMI P84/INT2 AFRDF 2346 RDF P83/INT1 P82/INT0 AFCK 2346 TCLK MICAFMUTE MICAFMUTE P76/TA3O CTCOUT CTC _OUT (PWM) TO VCO...
  • Page 28 QP-750 Service Manual P44/CS0 Rx circuit power supply control P43/A19 Tx circuit power supply control P42/A18 SAVE power save control P41/A17 P40/A16 P37/A15 P36/A14 WCON Wideband control P35/A13 NCON Narrowband control P34/A12 P33/A11 P32/A10 P31/A9 P30/A8 P27/A7 APCO Audio power control Pin...

  • Page 29: Audio Circuitry

    QP-750 Service Manual P00/D0 Side Key2 P107/AN7 BATTSEL Battery Type detect (NC) P106/AN6 BATT Battery voltage detect P105/AN5 MIC signal input P104/AN4 P103/AN3 SELF Reset mode control P102/AN2 RSSI RSSI detect pin P101/AN1 Squelch level input AVSS A/D conversion power supply input.

  • Page 30: Audio Power Amplifier

    QP-750 Service Manual 6.3.2 Audio Power Amplifier The audio power amplifier IC 2401 amplifies receiver audio from IC1408 pin 20 to a level sufficient to drive a loudspeaker. IC2401 is a bridge amplifier, which is sufficient to develop 500 milliwatts of audio power into the internal 16 ohm speaker or an external 16 ohm load.

  • Page 31: Programming And Flashing Through Microphone Jack

    QP-750 Service Manual 6.3.6 Programming and Flashing Through Microphone Jack The ring contact on the microphone jack is used for reading, programming or re-flashing the radio using Programming Software). This contact (J1402 pin 2) is routed to ports RXD (data into up, pin 30) and contact (J1401 pin 2) is routed to ports TXD (data out of up, pin 29).

  • Page 32: Receiver Back-End

    QP-750 Service Manual 7.2.2 Receiver Back-End The receiver back end is a dual conversion design. High IF selectivity is provided by a 49.95 MHz crystal filter with a minimum 3 dB bandwidth of ± 7 .5 kHz, a maximum 35 dB bandwidth of ±25 kHz, and a maximum insertion loss of 4 dB.
  • Page 33 QP-750 Service Manual Figure 7-2.Transmitter Block Diagram 7.3.1 AF and Signaling AF signal from the microphone is amplified and low-pass-filtered in IC1402 before it enters base band processing chip IC1408, which also enters CTC /CDC /DTMF /2Tone etc signaling generated by CPU. The IC1408 processed mixing signal enters VCO for direct FM modulation (see fig.4-4).

  • Page 34: Pll Frequency Synthesizer

    QP-750 Service Manual 7.3.4 APC The automatic power control (APC) circuit stabilizes the transmit output power by detecting the drain current of final stage amplifier FET. IC2100 (2/2) compares the preset reference voltage with the voltage obtained from final current. APC voltage is proportional to the difference between auto detect voltage and reference voltage output from IC2100 (1/2).

  • Page 35: Vco

    QP-750 Service Manual 7.4.2 VCO (Voltage Controlled Oscillator) The operating frequency is generated by Q1352 in transmit mode and by Q1350 in receive mode. Operating frequency generate a control voltage by phase comparator to control varactor diodes(D1350 D 1352 D1354 and D1355 in transmit mode, and D1351...

  • Page 36: Ctc/Cdc

    QP-750 Service Manual 7.5.1 CTC/CDC Transmit ： C TC/CDC signaling produced by CTC_PLL pass a low pass filter and then enters VCXO.CTC /CDC signaling produced by CTC_OUT pass a low pass filter and then mixed with AF before enters VCO.

  • Page 37: Chapter 8 Uhf Troubleshooting Tables

    QP-750 Service Manual Chapter 8 UHF Troubleshooting Tables Troubleshooting for CPU - 37 -...

  • Page 38: Troubleshooting For Vco

    QP-750 Service Manual Troubleshooting for VCO - 38 -...
  • Page 39 QP-750 Service Manual Troubleshooting for Transmission - 39 -...

  • Page 40: Troubleshooting For Receive

    QP-750 Service Manual Troubleshooting for Receive - 40 -...

  • Page 41: Chapter 9 Uhf Schematic Diagrams, Layout, Parts Lists

    QP-750 Service Manual Chapter 9 UHF Schematic Diagrams, Layout, and Parts Lists Introduction This section provides schematic diagrams, layout, and parts lists for the radio circuit boards. * Component is frequency sensitive. Refer to the Electrical Parts List for value and usage.

  • Page 42: Qp-750 Block Diagrams

    QP-750 Service Manual QP-750 block diagrams - 42 -...

  • Page 43: Qp-750 Uhf Schematic Diagrams

    QP-750 Service Manual QP-750 UHF Schematic Diagrams 9.3.1 QP-750 UHF RF section *C 1149 *C 1151 *C 1154 ANT1001 ANTENNA 1. 5 P *C 1138 D1101 C 1145 470p *L1112 *L1113 *L1114 R 1123 Q1107 *L1120 R QA0002 100P M A77...

  • Page 44: Qp-750 Vco Section

    QP-750 Service Manual 9.3.2 QP-750 UHF VCO section D1354 HVC 376B *C 1355 Q1310 C 1360 C 1310 C 1315 2S C5108(Y) VCO_AM P Q1354 D1355 HVC 350B Q1352 *C 1350 C 1358 0.5p 2S C5108(Y) *L1356 R 1310 R 1313 3.3K...

  • Page 45: Qp-750 Pll Section

    QP-750 Service Manual 9.3.3 QP-750 UHF PLL Section R1404 R1415 R1405 L1407 C 5V C1490 R1496 C1424 IC1400 C1436 1.2K 0.1u 20v 470p 0.1u 20v R1497 R1407 R set C1426 4.7K C1439 470p 1u 16v DVDD R 1419 C PGND...
  • Page 46 QP-750 Service Manual 9.3.4 QP-750 UHF Base Band Section C 5V R 5V VOICE VOICE AF DET AF DET R1490 R1489 R1487 R1485 C1484 C1432 TONEO ALM /B P TONEO ALM/B P 4.7k 0.1u 4.7K 0.1u C1486 C1485 R1493 R1460 0.01u...

  • Page 47: Qp-750 Af Section

    QP-750 Service Manual 9.3.5 QP-750 UHF AF section R XD R XD SWB + R2468 SWB + K1501 C2149 L2501 F2501 470pF JB 1001 BLM21P221SG ZD2401 C2602 220p EDZ6.8B C2518 HEADER 3 C2581 R2548 R2434 C2517 R2435 B ATTS EL...

  • Page 48: Qp-750 Controller Section

    QP-750 Service Manual 9.3.6 QP-750 UHF Controller section C2535 D2503 470p M 5V SWB + SWB + 1SS373 C2533 C2532 C2537 C2536 470p 470p 10u6.3 IC2504 XC6201T502PR M 5V JUM PER SC LK SC LK C NVss K507 ZD2504 C 2513 C NVss 0.01u...

  • Page 49: Qp-750 Uhf Pcb Layout

    QP-750 Service Manual QP-750 UHF PCB Layout 9.4.1 PCB Top Layer View - 49 -...
  • Page 50 QP-750 Service Manual 9.4.2 PCB Top Layer Chip Map - 50 -...
  • Page 51 QP-750 Service Manual 9.4.3 PCB Bottom Layer View - 51 -...
  • Page 52 QP-750 Service Manual 9.4.4 PCB bottom chip map - 52 -...

  • Page 53: Qp-750 (450-470Mhz) Parts List

    QP-750 Service Manual QP-750 (450-470MHz) Parts List Refer NO: Refer NO: Description Description Mark Mark Refer NO: Refer NO: Description Description Mark Mark 1 5 0 1 0 4 4 7 1 0 C 1 1 0 6 C a p a c i t o r 0 4 0 2 4 7 0 P F J 5 0 V...
  • Page 54 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 5 0 1 0 4 1 0 3 0 C 1 1 4 6 C a p a c i t o r 0 4 0 2 0 . 0 1 U F K 2 5 V...
  • Page 55 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description M M M M ark 1 5 0 1 0 4 1 2 0 0 C 1 2 1 7 C a p a c i t o r 0 4 0 2 1 2 P F J 5 0 V...
  • Page 56 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Descript Descript Descript Description Mark Mark Mark Mark 1 5 0 1 0 4 1 5 0 0 C 1 2 6 6 C a p a c i t o r 0 4 0 2 1 5 P F J 5 0 V...
  • Page 57 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 5 0 1 0 4 0 5 9 0 C 1 3 5 8 C a p a c i t o r 0 4 0 2 0 . 5 P F B 5 0 V...
  • Page 58 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 7 0 1 0 8 1 0 6 0 C 1 4 2 1 T a n - C a p . 0 8 0 5 1 0 U F M 6 . 3 V...
  • Page 59 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 5 0 1 0 4 1 0 2 0 C 1 4 5 3 C a p a c i t o r 0 4 0 2 1 0 0 0 P F K 5 0 V...
  • Page 60 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 5 0 1 0 4 4 7 2 0 C 1 4 8 5 C a p a c i t o r 0 4 0 2 4 7 0 0 P F K 5 0 V...
  • Page 61 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 5 0 1 0 4 2 2 4 0 C 2 4 0 7 C a p a c i t o r 0 4 0 2 0 . 2 2 U F Z 2 5 V...
  • Page 62 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Descript Descript Descript Description Mark Mark Mark Mark 1 5 0 1 0 4 4 7 1 0 C 2 5 2 8 C a p a c i t o r 0 4 0 2 4 7 0 P F J 5 0 V...
  • Page 63 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 5 0 1 0 4 1 5 1 0 C 2 6 4 6 C a p a c i t o r 0 4 0 2 1 5 0 P F J 5 0 V...
  • Page 64 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark D 1 0 1 0 3 0 0 3 0 D 1 3 0 6 M A 2 S 1 1 1 0 0 L...
  • Page 65 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 3 0 8 1 1 1 0 0 1 0 I C 2 5 0 4 X C 6 2 0 1 P 5 0 2 P R...
  • Page 66 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 2 0 0 1 0 6 5 6 4 0 L 1 2 1 1 I N D . 0 6 0 3 5 6 0 n H...
  • Page 67 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 2 2 0 1 0 4 2 2 1 0 L 2 5 0 3 F e r r i t e 0 4 0 2 2 2 0 Ω...
  • Page 68 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark T 1 0 1 0 4 0 0 4 0 Q 2 4 0 5 D T C 1 4 4 E E ( T L )
  • Page 69 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 1 0 1 0 6 2 7 1 0 R 1 1 5 4 R e s i s t o r 0 6 0 3 2 7 0 Ω J 1 / 1 0 W...
  • Page 70 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 1 0 1 0 4 6 8 2 0 R 1 2 4 0 R e s i s t o r 0 4 0 2 6 . 8 K Ω J 1 / 1 6 W...
  • Page 71 QP-750 Service Manual Refer NO: er NO: er NO: er NO: Description Description Description Description Mark Mark Mark Mark 1 1 0 1 0 4 1 8 1 0 R 1 3 5 6 R e s i s t o r 0 4 0 2 1 8 0 Ω J 1 / 1 6 W...
  • Page 72 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 1 0 1 0 4 1 0 4 0 R 1 4 2 8 R e s i s t o r 0 4 0 2 1 0 0 K Ω J 1 / 1 6 W...
  • Page 73 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 1 0 1 0 4 1 5 4 0 R 1 4 6 5 R e s i s t o r 0 4 0 2 1 5 0 K Ω F 1 / 1 6 W...
  • Page 74 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 1 0 1 0 4 2 7 2 0 R 1 4 9 7 R e s i s t o r 0 4 0 2 2 . 7 K Ω J 1 / 1 6 W...
  • Page 75 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 1 1 0 1 0 4 3 3 1 0 R 2 4 1 5 R e s i s t o r 0 4 0 2 3 3 0 Ω J 1 / 1 6 W...
  • Page 76 QP-750 Service Manual Refer Refer Refer Refer NO: Description Description Description Description Mark Mark Mark Mark 1 1 0 1 0 4 4 7 3 0 R 2 5 2 5 R e s i s t o r 0 4 0 2 4 7 K Ω J 1 / 1 6 W...
  • Page 77 QP-750 Service Manual Refer NO: Refer NO: Refer NO: Refer NO: Description Description Description Description Mark Mark Mark Mark 3 1 3 1 1 6 0 0 1 0 S E N S O R M X D 2 0 2 0 M L M E M S I C...
  • Page 78 QP-750 Service Manual Chapter 10 Specification General Frequency range 450 ~470 /MHz Channel capacity Channel spacing 12.5/20/25KHz Antenna impedance Operation voltage 7.5V DC Frequency stability ±2.5ppm Operating temperature 0 ℃ - + 6 0 ℃ Battery Polymer 2100mAH Li- Transmitter Carrier output power 5.0W(H)/3W(M)/1W(L)
  • Page 79 QP-750 Service Manual © 2009 Quantun Electronics, LLC. All Rights Reserved V1.0A P/N 7130750011 - 79 -...

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