Abell A-82 Service Manual
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Abell A-82 Service Manual

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ABELL A-82 UHF Service Manual
ABELL INDUSTRIES CO. LTD
A-82
SERVICE MANUAL
V．1.0
Web:
www.abell.com.cn
Email: sales@abell.com.cn
TEL: 86-755-26095567
FAX: 86-755-26404666
ADD: 2F,14BLDG, Zhongxing
Industries city, NanShan, Shenzhen, China
- 0 -

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  • Page 1 ABELL A-82 UHF Service Manual ABELL INDUSTRIES CO. LTD A-82 SERVICE MANUAL V．1.0 Web: www.abell.com.cn Email: sales@abell.com.cn TEL: 86-755-26095567 FAX: 86-755-26404666 ADD: 2F,14BLDG, Zhongxing Industries city, NanShan, Shenzhen, China - 0 -...

  • Page 2: Table Of Contents

    ABELL A-82 UHF Service Manual ABELL Industries Co., Ltd A-82 UHF SERVICE MANUAL V1.0 Contents GENERAL……………………………………………………………………………2 REALIGNMENT……………………………………………………………………..3 DISASSEMBLY FOR REPAIR……………………………………………………..8 CIRCUIT DESCRIPTION……………………………………………………………10 Components LIST……………………………………………………………………11 EXPLODED VIEW…………………………………………………………………..38 PACKING…………………………………………………………………………….39 ADJUSTMENT………………………………………………………………………40 ELECTRONIC CIRCUIT DESCRIPTION …………………………………………………………………46 SCHEMATIC DIAGRAM……………………………………………………………47 PC BOARD VIEWS…………………………………………………………………55 SPECIFICATIONS …………………………………………………………………. 57...

  • Page 3: General

    ABELL A-82 UHF Service Manual GENERAL INTRODUCTION SCOPE OF THIS MANUAL This manual is intended for use by experienced technicians familiar with similar types of commercial grade communications equipment. It contains all required service information for the equipment and is current as of the publication data.

  • Page 4: Realignment

    ABELL A-82 UHF Service Manual REALIGNMENT 1 Mode User Mode PC Mode Manufacture Mode MODE FUNCTION User Mode Use this mode for normal operation Use this mode, to make various settings by PC Mode means of the FPU through the RS-232C port.
  • Page 5 ABELL A-82 UHF Service Manual ① PTT(Push-To-Talk)switch Press this switch, then speak into the microphone to call a station. Release the switch to receive. ②Function Key（K1） This key is programmable, long key(Pressing time up to the pre-set) and short key(normal pressing...
  • Page 6 ABELL A-82 UHF Service Manual Battery Save Enable or shut down the power save function. Channel Announcement Enable or shut down the channel announcement function. VOX Gain, VOX Delay Time Enable or shut down the VOX function, set the sensitivity of VOX, VOX delay time is to set the transmiting delay time after the VOX being enable.
  • Page 7 ABELL) and programming software. Chart 2 shows how the devices work. Chart 2 Connection procedure 1）Connect the A-82 to the personal computer with the interface cable. 2）Operate A-82 prgramming software. 3）Set the communication interface 4）Operate the programming to the radio 5）When data is transmitting from the transceiver the red LED lights.
  • Page 8 Programming Interface Cable description (PC programming interface cable: Option) The programming interface cable is required to interface the A-82 with the computer. It has a circuit in its D-sub connector (9-pin) case that converts the RS-232C logic level to the TTL level. The programming interface cable connects the side panel jacks of the A-82 to the computer’s RS-232C...

  • Page 9: Disassembly For Repair

    ABELL A-82 UHF Service Manual DISASSEMBLY FOR REPAIR Separating the case assembly from the chassis 1．Remove the two knobs ① and round nut ②. 2．Remove the two screws③. 3．Expand the right and left sides of the bottom of the case assembly, lift the chassis, and remove it form the case assembly④.
  • Page 10 ABELL A-82 UHF Service Manual Chart 3 Note： ： ： ： Ensure all these points being soldered well after the main board is assemblied to the chassis after repairing. - 9 -...

  • Page 11: Circuit Description

    ABELL A-82 UHF Service Manual CIRCUIT DESCRIPTION 1．Frequency configuration The receiver utilizes double conversion. The first IF is 38.85MHz and the second IF is 450 KHz. The first local oscillator signal is supplied from the PLL circuit. The PLL circuit in the transmitter generates the necessary frequencies. The Chart 4 display all these frequency.
  • Page 12 ABELL A-82 UHF Service Manual CF300 MIXER IF AMP RF AMP AF PA AMP Q300 XF301 L307,L308,L309 D301,D302 Q302 L310,L312,L314,L315 Q301 RF AMP IF,MIX,DET ANT SW LPF,HPF IC300 IC401 D303,D306,308 D304,D304,D307 TUNE MUITLPLY TCXO WIDE/NARROW SW Q303 1ST LOCAL OSC (PLL) Chart 5.
  • Page 13 ABELL A-82 UHF Service Manual Q303 W/N SW IC401 FM IF IC IC300 Q404 AF PA AMP AF AMP IF AMP IC301 Q4,Q5 IC301 QT/DQT 图 3 音音音音音音音音音音音音 Chart 6. Audio AMP and noise reducing circuit 6） Receive signaling QT/DQT 300Hz and higher audio frequencies of the output signal from IF IC are cut by IC301.
  • Page 14 ABELL A-82 UHF Service Manual Q101 PLL IC100 D100,D101 TX VCO Q100 RF AMP Q102 BUFF AMP PLL DATA PHASE CHARGE PUMP COMPARATOR Q104 REF OSC D102,D103 RX VCO Q13,Q14 5KHz/6.25KHz T/R SW 图 4 锁锁锁音音 12.8MHz Chart 7. VCO circuit 3）...
  • Page 15 ABELL A-82 UHF Service Manual 3） Wide/Narrow bandwidth switch Set the wide/narrow bandwidth of each channel by being enable the wide/narrow switch. Wide bandwidth(Low level) and narrow bandwidth(High level) signal is outputted from pin 56 of IC1. When receive the Wide bandwidth(Low level) signal, Q402 is got through. When receive the narrow bandwidth(High level) signal, Q402 is cut off.
  • Page 16 ABELL A-82 UHF Service Manual 6） Antenna converting switch and LPF Before the RF signal arrive the Antenna terminal, the signal from RF amplifier go through a lowpass filter and transmit/receive converting circuit. Transmit/Receive converting circuit is made up by D200, D301 and D302.

  • Page 17: Components List

    ABELL A-82 UHF Service Manual Component List A82(D04) A Side Version: 01 Specification Packing Description Part No. Chip Resistor 0402 ±5% R14 R27 R42 R52 R71 R68 R244 0.39R 1206 ±5% R236 R237 R238 4.7R 0402 ±5% R2 R8 0402 ±5%...
  • Page 18 ABELL A-82 UHF Service Manual 120K 0402 ±5% 150K 0402 ±5% R239 R240 R241 R242 R243 R249 150K 0603 ±5% 180K 0402 ±5% R136 R248 270K 0402 ±5% R13 R134 330K 0402 ±5% 750K 0402 ±5% R422 0402 ±5% R10 R246 1.8M...
  • Page 19 ABELL A-82 UHF Service Manual 6.8UF Type R ±20% 6.3V C245 Inductor BLM18AG601SN1D 0603 Magnetic Beads 600R L1 L3 L9 L400 L401 Lows Multi-layer MLF1608DR22K 0603 L5 L6 inductor LQH32MN1ROM23 1210 Winder、Ferrite L207 Diode DAN222 SOT-416 DIODE D401 1SS372 SOT-323...
  • Page 20 ABELL A-82 UHF Service Manual A82(D04) B Side Version: 01 Specification Packing Description Part No. Chip Resistor 0402 ±5% R24 R111 R304 R308 R453 R456 0603 ±5% R201 0805 ±5% R203 0402 ±5% R103 R129 R216 0603 ±5% R312 0402 ±5%...
  • Page 21 ABELL A-82 UHF Service Manual 0402 ±5% R131 0402 ±5% R36 R115 R118 R223 R435 0402 ±5% R210 0402 ±5% R315 R316 0402 ±5% R325 0402 ±5% R139 R429 R333 R34 R113 R116 R302 R303 R306 R307 100K 0402 ±5%...
  • Page 22 ABELL A-82 UHF Service Manual 10PF 0402 COG，±5%，16V C153 C154 C345 18PF 0402 COG，±5%，16V C120 C121 C323 22PF 0402 COG，±5%，16V C110 27PF 0603 COG，±5%，16V C202 30PF 0402 COG，±5%，16V C329 C337 C339 C328 C333 33PF 0402 COG，±5%，16V C70 C74 C348 39PF 0603 COG，±5%，16V...
  • Page 23 ABELL A-82 UHF Service Manual 0402 NC C210 C220 C298 C344 C346 R26 Adjustable capacitor φ2 TZVY2Z060110T00 TC100 TC101 TC301 10PF φ2 TZVY2Z100A001R00 TC300 Tan-capacitor 0.1UF Type A ±20% 35V C113 C114 Type A ±20% 16V C140 4.7UF Type R ±20% 6.3V...
  • Page 24 ABELL A-82 UHF Service Manual inductor LF, Multi-Layer MLF1608A3R3K 0603 L99 L112 inductor LF, Multi-Layer MLF2012A4R7K 0805 L118 inductor with AIR-CORE COIL 0.4×φ1.6×3TR Type P L307 L308 L309 L310 L312 L315 pin“E" with AIR-CORE COIL 0.4×φ1.6×4TR Type P L204 L205 L206 L314 pin“E"...
  • Page 25 ABELL A-82 UHF Service Manual NJM2904V SSOP8 ACTICE FIL TER IC301 TA31136FN TSOP16 IF SYSTEM IC300 MB15E03SLPFV1 SSOP16 IC100 Ceramic filter LTWC450F IF filter (With direction) CF300 11.6×7.5×3.3mm Crystal 12.8MHz 3.2×5mm NSA0298A X100 crystal filter﹙With MCF 38.85MHz XF301 direction﹚ Feather-touch...
  • Page 26 ABELL A-82 UHF Service Manual A82(D04) Assembly Parts BOM Version： 01 Material No. Material Specification Quantity Remark F04A82-003 half product Assembly： ： ： ： Plastic parts P01A82-026 Housing PC+ABS P08A82-008 Volume Knob PC+ABS P07A82-008 Channel knob PC+ABS P17A82-003 Speaker Cover...
  • Page 27 ABELL A-82 UHF Service Manual L09A82-002 Mic rubber sheet RUBBER'30 L08A82-007 heat shrinkage bush φ1.0×14mm Used for heat shrinkage bush anode L03A81-006 Knob waterproof ring RUBBER'30 L03A81-005 Antenna waterproof ring RUBBER'30 Metal Parts: M21A82-002 Speaker steel net 0.15 Stainless steel...
  • Page 28 ABELL A-82 UHF Service Manual A82(D04) Packing Material BOM Version: 01 Material No. Material Specification Remark Anti-counterfeiting mark " T13307-001 Logo on package "(Mark according to frequency and country) Inteligent & Rapid B06A82-012 Input：12VDC/1A Output：800mA BC-82 Charger B10A82-012 Li-ion Battery 1600mAh AA 7.4V...
  • Page 29 ABELL A-82 UHF Service Manual A82(D37)BOM Change based on （D04） Version：01 Material No. Packing Part No. Capacitance 1.5PF 0402 COG，±0.1PF，16V C220 0402 COG，±0.1PF，16V C318 2.4PF 0402 COG，±0.1PF，16V C334 0402 COG，±0.1PF，16V C105 3.6PF 0402 COG，±0.1PF，16V C342 0402 COG，±0.5PF，16V C349 27PF 0402 COG，±5%，16V...

  • Page 30: Exploded View

    ABELL A-82 UHF Service Manual EXPLODED VIEW ： 第 14 页 共 41 页...

  • Page 31: Packing

    ABELL A-82 UHF Service Manual PACKING 15.PROTECTION BAG (H25-0085-04) 14.PACKING FIXTURE 21.BELT HOOK (H12-3037-02) (J29-0624-03) 16.PROTECTION BAG A N T . W H I P A N T E N N A (H25-2012-04) ( T 9 0 - 0 6 9 4 - 1 5 ) : M ( T 9 0 - 0 6 8 4 - 0 5 ) ;...

  • Page 32: Adjustment

    ABELL A-82 UHF Service Manual ADJUSTMENT Required test Equipment 1． ． ． ． Stability power supply 1)．The supply voltage can be changed between 5V and 18V, and the current is 3A or more. 2)．The standard voltage is 7.5V 2． ． ． ． DC Ammeter 1).
  • Page 33 ABELL A-82 UHF Service Manual 10． ． ． ． Spectrum Analyzer 1)． Measuring range：DC to 1GHz or more. 11． ． ． ． Standard Signal Generator (SSG) 1). Maximum frequency：500MHz or more. 2). Output：－133dBm/0.05µV to 7dBm/501mV 3). Output resistance：50 12． ． ． ． Tracking Generator 1).
  • Page 34 ABELL A-82 UHF Service Manual Remark ·Connect the transceiver to the PC. ·Send the channel data to the transceiver, then backup the data. ·Program the adjustment frequencies which are on the list, into the transceiver. Note：Remember to reload the backed up date after making the adjustment.
  • Page 35 ABELL A-82 UHF Service Manual A-82 Adjustment Instruction Version 1.0 Use the A82 UHF programming software for adjustment the following item in the PC mode. Squelch Level, Transmit frequency, DQT balance, RF power, QT deviation, DQT deviation, Battery level, Section...
  • Page 36 ABELL A-82 UHF Service Manual 4.Low battery Battery:5.8V Digital voltmeter Battery Program Software Enter Low battery adjust Low battery TX adjust Terminal Low battery adjust Enable auto-adjust data prevention: 5.8V±0.1V (middle) Choose Save Data to Low battery remind: finish the adjustment 6.3V±0.1V...
  • Page 37 ABELL A-82 UHF Service Manual Receiver Section Measurement Adjustment Specifications/Remar Item Item Test Termin Condition Method Equipment Sensitivity adjust Test Channel Signal Antenna Program Software Enter Sensitivity adjust SINAD: Higher than 12dB (Narrow) CH:01,02,03,04,05 generator Terminal Sensitivity adjust adjust data...
  • Page 38 ABELL A-82 UHF Service Manual PCB Part No. Chart A Side 第 22 页 共 41 页...
  • Page 39 ABELL A-82 UHF Service Manual B Side 第 23 页 共 41 页...

  • Page 40: Schematic Diagram

    ABELL A-82 UHF Service Manual Schematic diagram CL O CK D AT A X FIN G N D O SC O SCIN G N D X O U T G N D P 81/ TFO 01 P27/TD D 1 P 80/ TFO 00...

  • Page 41: Specifications

    ABELL A-82 UHF Service Manual Specification Frequency Range…………………………………400-440MHz（D04）430-470MHz（D37） RF Power Output………………………………… 4W Channel Capacity…………………………………16 Channel Operating Voltage…………………………………7.5V DC±20% ℃ -22℉-- +140 ) ℉ Temperature Range………………………………-30℃-- +60 ( Size and weight……………………………………53mm×118mm×31mm with AB-L1682(7.4V 1600mAh) 266g(0.586bs) 第 25 页 共 41 页...

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