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QP-650U Plus Service Manual Quantun Electronics,LLC - 1 -...
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Revised History Date Decription Version Note 2010-3-9 Issue V0.1A - 2 -...
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Content General……………………………………………………………………………3 Brief Introduction………………………………………………………………..4 Software Description…………………………………………………………..6 Circuit Description……………………………………………………………..10 CPU Pins…………………………………………………………………………15 Part List 1………………………………………………………………………..17 Adjustment Description……………………………………………………….49 Disassembly and Assembly………………………………………………..52 Exploded View………………………………………………………………..56 Part List 2……………………………………………………………………….57 PC Board View………………………………………………………………….58 Block Diagram…………………………………………………………………..62 Schematic Diagram…………………………………………………………..63 Specifications…………………………………………………………………66 - 3 -...
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QP-650U Plus General General 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 The following precautions are recommended for personnel safety: DO NOT transmit until all RF connectors are verified secure and any open connectors are properly terminated.
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QP-650U Plus Brief Introduction Brief Introduction Antenna LED indicator The light will glow red during transmission. The light will glow green during receiving. During transmission, the light flashes red when the battery voltage is low. 3. Channel selector knob Turn the channel selector knob to select from channels 1-16 (Channel 16 can be programmed by your dealer as scan function).
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QP-650U Plus Brief Introduction 1)VOX 2)Power Level 3)monitor 4)monitor momentary 5)scan 6)squelch off 7)squelch off momentary 8)channel lock 9) battery indicator 7. Microphone 8. Speaker 9. External jack Remove the jack cover and insert an earphone; or insert programming cable into the jack to program the radio via programming software.
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QP-650U Plus Software Specification Software Specification Radio Feature Description Use channel selector knob to choose from 16 channels Channel Annunciation, The feature enables radio to report the current channel number when power on or switching channel,. Channel Spacing 12.5KHz/20KHz/25KHz Narrow/Middle/wide Optional High/low Power (Dealer programmable) CTCSS/CDCSS 51+104 groups, user definable...
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QP-650U Plus Software Specification Manual Adjust Mode (1) Enter the manual adjust mode Turn channel knob to Channel1, Turn on the power while holding down PTT and Side key simultaneously for 2 seconds, orange LED will flashing two times., release the PTT and SK1 key , then press PTT button for 2 seconds, the red led flashes and release the two keys again, the radio enters manual adjust mode.
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QP-650U Plus Software Specification Defination CH. NO. Frequency Bandwidth User Wired Clone Mode (1). Turn on the power while holding down Side key for 2 seconds, green LED flash two times, the radio enters wired clone mode. (2). Press the PTT key to begin wired clone and slave radio red LED lights, when clone is completed, master radio orange led lights, and slave radio red Led goes out.
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QP-650U Plus Circuit Description Circuit Description 1. Power Supply Power supply of the radio is derived from the battery, which supplies battery B+ through power switch. U608 supplies 5V (5M) voltage for the control circuit. U607 supplies 3V voltage for the PLL circuit. And U200 supplies voltage for the transmit(V_TX), receive(V_RX) and vco(V_SAVE) circuit.
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QP-650U Plus Circuit Description The output signal from phase comparator is filtered through a low pass filter to generate a level D.C., and the level D.C. controls oscillator frequency by controlling VCO. The operating frequency is generated by Q100 in transmit mode and by Q101 in receive mode. Operating frequency generate a control voltage by phase comparator to control varactor diodes so that the oscillator frequency is consistent with the MCU preset frequency(D100、D101、D104 and D105 in transmit mode, and D102、D103、D106 and D107 in receive mode).
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QP-650U Plus Circuit Description again in U200 to create a 450 KHz second IF signal. The second IF signal then passes through a 450KHz ceramic filter to eliminate unwanted signals before it is amplified and detected in U200. 4. Transmitter AF and signaling AF signal from the microphone is amplified and low-pass-filtered in U200, which also enters CYC/CDC/DTMF etc signaling generated by CPU.
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QP-650U Plus Circuit Description 5. Base band and signaling system The block diagram of signaling section is shown as figure 5. Fig. 5 AF and Signaling Circuit CTC/CDC Transmit: CTC/CDC signaling produced by CTC_PLL pass a low pass filter and then enters VCXO.
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QP-650U Plus Circuit Description CTC/CDC Code Audio Processor TXD/RXD PLL IC BEEP APC_SW DTMFO QT_OUT APC/TV SAVE PTT/RXD RSSI M_Band MONI BUSY SPV_C MIC_EN QT_IN VOXDET BATT Fig.6 MCU Block Diagram 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;...
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QP-650U Plus MCU PINS CPU Pins PIN No. PIN Name Description EEPROM DATA MODE RESET Reset input XOUT Crystal oscillator output pin Crystal oscillator input pin DTMF DTMF output APC/TV Power control/ receiver tuning out PLLCLK PLL clock output PLLEN PLL strobe output 0: Wideband control 1: Narrowband control...
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QP-650U Plus MCU PINS PIN No. PIN Name Description LEDR Red light control:H,lit;L,out LEDG Green light control:H,lit;L,out PTT key IN Side Key1 EXT_DEV EXT_DEV detect APCSW APC SW BUSY Squelch level input BATT Battery voltage detect VOXDET VOX level input RSSI RSSI level input QT_IN...
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QP-650U Plus Part list1 Part list 1 Description Refer. NO. Qty. Note 1501061040 Capacitor 0603 0.1UF K 50V C100 1701084750 TAN-Capacitor 0805 4.7UF M 10V C101 1701121060 TAN-Capacitor 1206 0.1UF M 16V C102 1501041030 Capacitor 0402 0.01UF K 25V C105 1501041020 Capacitor 0402 1000PF K 50V C106...
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QP-650U Plus Part list1 Description Refer. NO. Qty. Note 1501040600 Capacitor 0402 6PF B 50V C124 1501060590 Capacitor 0603 0.5PF B 50V C125 1501061040 Capacitor 0603 0.1UF K 50V C126 1501041040 Capacitor 0402 0.1UF K 16V C127 1501040600 Capacitor 0402 6PF B 50V C130 1501041020 Capacitor 0402 1000PF K 50V...
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QP-650U Plus Part list1 Description Refer. NO. Qty. Note 1501044710 Capacitor 0402 470PF J 50V C201 1501044740 Capacitor 0402 0.47UF Z 25V C202 1501042240 Capacitor 0402 0.22UF Z 25V C203 1501041020 Capacitor 0402 1000PF K 50V C204 1501041040 Capacitor 0402 0.1UF K 16V C205 1501044710 Capacitor 0402 470PF J 50V...
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QP-650U Plus Part list1 Description Refer. NO. Qty. Note 1501044730 Capacitor 0402 0.047UF K 25V C225 1501041050 Capacitor 0402 1UF K 6.3V C226 1501046830 Capacitor 0402 0.068UF K 25V C227 1501043910 Capacitor 0402 390PF J 50V C228 1701081060 TAN-Capacitor 0805 10UF M 6.3V C229 1501041050 Capacitor 0402 1UF K 6.3V...
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QP-650U Plus Part list1 Description Refer. NO. Qty. Note 1501045620 Capacitor 0402 5600PF K 25V C244 1501043300 Capacitor 0402 33PF J 50V C245 1501041050 Capacitor 0402 1UF K 6.3V C246 1501041050 Capacitor 0402 1UF K 6.3V C247 1501041040 Capacitor 0402 0.1UF K 16V C249 1501041020 Capacitor 0402 1000PF K 50V...
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QP-650U Plus Adjustment Description Adjustment Description The radio can be adjusted by manual adjustment. Manual adjustment procedure is as follow. (Refer to “All reset mode” and “manual adjust mode” in the section Software Specification.) Instrument: Radio Communication Test Set 1 set 3A/10V Power Supply 1 set Digital Voltmeter...
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QP-650U Plus Adjustment Description TX section Item Condition Test Method Purpose Instrument 1. Transmit Turn to CH5; TX Test Adjust VR200 Frequency Error frequency ≤100Hz 2. CDCSS balance Turn to CH5. TX TEST PTT key standard waveform Adjust at 1 point (wideband), HPF:20HZ SFK2 key LPF:300HZ...
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QP-650U Plus Adjustment Description 7. DTMF Turn to CH8. TX Test PTT key 3.2KHz (25KHz) deviation Adjust at 1 point (wideband), HPF: 20Hz SK1 key 2.5KHz (20KHz) 1 point (medium band), LPF: 15KHz 1.8KHz (12.5KHz),) 1 point (narrow band). 8. VOX GAIN1 Turn to CH9.
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QP-650U Plus Disassembly and Assembly Disassembly and Assembly Remove the Battery Turn the radio off. Slide the battery latches upwards. Pull the top part of the battery away from the radio’s body and lift the battery from the radio. Figure 1 Disassemble main unit (aluminum chassis and PCB) 1.
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QP-650U Plus Disassembly and Assembly Figure 3 The disassembly is shown as the figure 4. Figure 4 Disassemble PTT button Push the PTT button in indicated direction until out of the cover. (See figure 5) Figure 5 - 54 -...
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QP-650U Plus Disassembly and Assembly Assemble PTT button Paste double-coated tape to the cover. And then press the PTT button into the corresponding opening in the cover. (See figure 6) Figure 6 Attach the battery 1. Fit the extensions at the bottom of the battery into the slots on the radio chassis. Press the top part of the battery towards the radio until a click is heard.
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QP-650U Plus Specifications Specifications General Frequency Range UHF: 400-470MHz Channel Capacity Channel Spacing 25/20/12.5KHz Operating Voltage 7.4V Battery 1400mAh(Li-ion) Frequency Stability ±2.5ppm Operating Temperature -20℃~+50℃ Antenna Impedance 50Ω Transmitter RF Power Output 5W/1W Modulation 16KΦF3E/8KΦF3E Spurious and Harmonics ≤7.5uW FM Noise 40dB Audio Distortion ≤5 %...
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