TC-500 RDA U1&V Service Mannua
Contents
1. e PAN AS AS An PSR LAN 279 C632 T2J 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 1 280 C633 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS ARR PAN AS e AN JAn AR AS 285 C647 T3A 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 1 TR PAN A gt n as GN l m PI PAN AS e m o AR ON 301 C674 T4A 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 302 C677 TA 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 303 C678 TA 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 304 C679 B4D 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 305 C680 B3F 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 25 e PAN AS Parts List 1 Service Manual 316 L406 B3D 3210305120000 Wire wound chip inductor 1uH J 245mA 1 10 RoHS 317 L419 B3D 3210305150010 Multi layer chip inductor 12nH J 300mA 0 280hm RoHS 318 L418 B3E 3210305229010 Multi layer chip inductor 15nH J 300mA 0 320hm RoHS 319 R511 3210306101000 Multi layer chip inductor 2 2nH S 300mA 0 12ohm RoHS 320 L506 3210306470000 Multi layer chip inductor 100nH J 300mA 0 900hm RoHS 321 L508 3212106120000 Multi layer chip inductor 47nH J 300mA 0 700hm RoHS 322 L509 3212106120000 Multi layer chip inductor 12nH J 300mA 0 280hm RoHS 321322. 13 PCB View PCB View Top Layer PANE Y 9299 les JOU epe m Aa eu EA L E gt Jess 2 l EES nan E e 299 fes Gr Ea SSC Y Ja a G ra SA X X ds 50 PCB View Bottom Layer i d a B A Ver P cc E MEL A A LAA J Wh MER x z mI prope E 4 20 0 s N ls ee EJ zy L E y e dmm F Ec Egon oe Ud GN J H G F E D C B 51 14 Level Diagram 24dBm 2450m Vrms 7dBm 90m Vrms 37 5dBm T i 1 120m Vrms 36dBm 123dBm DAC ADC y T 37dBm o ANT LPF DSP D4018 p402 122dBm 121 5dBm U101 RDA1846 d 113dBm i 109dBm 52 15 Block Diagram B201 X SP JACK J3 PJ D3027D MICJACK PA Q403 RD07 D VOX_DET U613 BAT D656 La A x LED
3. The Company endeavors to achieve the accuracy and completeness of this manual but no warranty of accuracy or reliability is given All the specifications and designs are subject to change without notice due to continuous technology development No part of this manual may be copied modified translated or distributed in any manner without the express written permission of us If you have any suggestions or would like to learn more details please visit our website at http www hytera com Service Manual Introduction 1 Introduction Intended User This manual is intended for use by qualified technicians only Product Controls Service Manual 2 Product Controls maj MINI 4 Power 3 Channel 1 Antenna 2 LED Indicator On Off Volume Control Selector Knob Knob 1 5 PTT Key 6 MONI Key 7 Microphone 8 Speaker 9 Accessory Jack 10 Battery 11 Belt Clip 12 Battery Latch PTT Push to Talk Key Hold the PTT key to transmit and release it to receive SK1Key Side Key 1 is a programmable key that can be assigned with long press function and short press function by your dealer Functions below are programmed by factory default Service Manual Product Controls Short press Squelch Off SK1 Key Channel Selector Knob Rotate the knob to select
4. 2 ml Q406 C441 C442 150k 1 150k 1 E DTC114EE 0 1u 470P C407 R438 R441 470p 1 56K 4 7K R439 33K C463 0 1u 5V L527 Q502 ais R519 4 Hm 3 E 51 ME RX ENS 2 C524 C521 R516 R512 x 470P 0 1U NC 13K R514 C527 d 2 7K 470P 1 E gt li C525 L506 C528 EMD22 1000P 100n 1000P Il R523 C520 C526 C517 R520 jii C514 0 RFIN C513 C519 68p 1000p R524 NC Q501 2SC3356 C511 C512 NC NC C518 NC Service Manual Specifications ech m e gt D PI gt O A ct O 0 General Frequency Range 400 470MHz O Channel Capacity Channel Spacing 25 KHz 12 5KHz Operating Voltage 6 0V DC Battery 1100mAh Ni MH Battery Battery Life 5 5 90 Duty Cycle 27 hours Operating Temperature 20 C 60 C Dimensions HxWxD with standard battery without 109x54x34mm antenna Weight with standard antenna amp 2709 battery Frequency Stability 2 5ppm Receiver Sensitivity lt 0 251uV 0 282uV RX S N 245dB 40dB Adjacent Channel Selectivity 265dB 55dB Intermodulation gt 55dB 50dB Spurious Response Rejection 65dB Rated Audio Power Output 0 5W Speaker impedance 4 ohm Rated Audio Distortion lt 5 0 5W Transmitter RF Power Output N C N Specifications Service Manual Spurious and Harmonics 26dBm Modulation Limiting S5KHZ 2 5KHZ Adjacent Channel Power lt 70dB 60dB Note All Specifications are tested a
5. C522 3101054790040 Chip Capacitor 4 7PF B 50V COG HQ 0402 RoHS C523 3101054790040 Chip Capacitor 4 7PF B 50V COG HQ 0402 RoHS 238 C201 T2E 3101074750010 Chip Capacitor 4 7UF K 10V X5R 0805 RoHS 239 C641 T21 3101074750010 Chip Capacitor 4 7UF K 10V X5R 0805 RoHS 240 C657 Tai 3101054720000 Chip Capacitor 4700PF K 50V X7R 0402 RoHS 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 1 242 C118 B2H 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 243 C119 B2H 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 244 C121 B2H 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 245 C122 B2H 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 246 C128 B2G 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 247 C129 B2G 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 248 C131 B2G 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 249 C132 B2H 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 250 C133 B2H 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 251 C134 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 252 C209 T3E 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 253 C330 T4E 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS 254 C332 TSE 3101054710010 Chip Capacitor 470PF K 50V X7R 0402 RoHS Service Manual Parts List 1
6. No No Normal speaker Replace it Yes Y Check U601 No e gt U602 U604 and U606 NO ai E Replace X601 Yes Y Check pin ther control pins No connection or are normal reburn the program Yes y MCU is OK 40 Service Manual Service Manual Disassembly and Assembly 9 Disassembly and Assembly 9 1 Removing the Battery To remove the battery power off the radio first push the battery latch upwards and then take out the battery from the battery slot See Figure 1 Figure 1 9 2 Removing the Aluminum Chassis and PCB Kit Step 1 Unfasten the two screws at the bottom of the radio Step 2 Remove the Volume Control knob and Channel Selector knob Step 3 Remove the antenna at the top of the radio Step 4 Unfasten the screws for fastening MIC cover and remove the cover See Figure 2 Screws 25 7 MIC cover Volume Control knob Channel Selector knob Figure 2 41 Disassembly and Assembly Service Manual Step 5 Lift the bottom of the aluminum chassis pull the aluminum chassis backwards and take it out See Figure 3 Figure 3 The disassembled parts are shown below 9 3 Removing the PTT Key Push PTT key from outer side of the aluminum chassis See Figure 5 42 Service Manual Disassembly and Assembly Figure 5 9 4 Assembling the PTT Key Step 1 Apply do
7. SERVICE MANUAL TWO WAY RADIO Contents Introduction o 1 A ood ceto aU neu MM M I A E M EE CE DIE 2 EDD HEET 5 c CIFCUIL DESEN PLON eno 9 CRU A bia 16 O Parne LIST LR cl LI eine 19 Ts TUNING DESC a 28 9 Troubleshooting FIOW eT nn eege 38 9 Disassembly and RT le EE 41 10 Exploded VIEW nd RE D Sn ili 45 jm Pans LIST kob a ae 46 12 Te ele EU EE 49 PCR VIN ok ee n e oo ne es n aie ka a on 50 T4 Level DIO E 52 15 Block DIAM aaa 53 16 Schematic DA FAM E 54 EE 57 Copyright Information HYT is the trademark or registered trademark of Hytera Communications Co Ltd the Company in PRC and or other countries or areas The Company retains the ownership of its trademarks and product names All other trademarks and or product names that may be used in this manual are properties of their respective owners The product describes in this manual may include the Company s computer programs stored in memory or other media Laws in PRC and or other countries or areas protect the exclusive rights of the Company with respect to its computer programs The purchase of this product shall not be deemed to grant either directly or by implication any rights to the purchaser regarding the Company s computer programs Any of the Company s computer programs may not be copied modified distributed decompiled or reverse engineered in any manner without the prior written consent of the Company Disclaimer
8. e Clone Mode Only clone relevant data in user mode such as frequencies Tuning parameters like tuning frequency tuning item and base band parameter will not be cloned e Factory Clone Mode Clone all the data excluding serial No 7 4 Description of Tuning Items Ch Tunable EME Frequency Freq Freq Freq Freq Freq Freq Freq Freq Freq Freq A 2 Wo 4 25 1 2 E 4 5 CTCSS Deviation Y Y Y Y Y Y low CTCSS Deviation 7 Y Y Y Y Y medium CTCSS Deviation Y Y Y Y high TX Low Voltage 10 Y Threshold E p P gt p E E gt y gt p E Max TX Audio Y Y Y Y Deviation RX Circuit RX Low Voltage Y Threshold Tuning Description Note Service Manual Y indicates frequencies available for tuning and the rest are blank channels without tuning items 7 5 Baseband Design Baseband AAR Gain dB Low Fass Filter Compandor Time ms Fre emphasis Pre emphasis P Wide Volume Gain dB Tune Digital Gain Wide Output Sequelch Off oquelch Un okip Ti High Pass Skip Kn High Pass okip Ti Low Pass okip EX Low Pass Pre emphasis Wide Noise Detect High Narrow Noise Detect Description 3k 100 zug 123 125 n V 1 K kd 3 wi Normal 47 13 hall Harrow AAR Gain dB Adjust Digital Compandor Reference w De emphasis Inhi De emphasis Pe Harrow Volume Gain dB TX AGC Harrow Uu
9. Voltage Digital voltmeter Supply Selector to Supply sample it Threshold Interface channel 10 alert tone Then save sounds your change and go to another channel 35 Tuning Description Service Manual Measurement Tuning 00 Item Condition Compo opecifications Test Instrument Test Point e Method Remarks mE Press MONI Communication Test Set Rotate the the value SSG A7dBm Antenna Channel Then save MOD 1KHz Earpiece Selector knob your change DEV 3KHz Socket to channel 11 and go to Filter 0 3 SKHZ key to adjust another channel 1 7 Appendix 1 Appendix 1 T eei 7 Value for Source Radio TxLowPower T2 Ju T es fr po po dr Me E E E TE CDCSS Deviation CTCSS Deviation low CTCSS Deviation high TX Low Voltage CTCSS 25 Deviation medium Service Manual Tuning Description Threshold Max TX Audio 49 49 49 49 49 49 49 49 49 49 Deviation Rx Item Section RX Low Voltage 135 Threshold Max RX Audio 218 Power Note The value is subject to that of the source radio 37 Troubleshooting Flow Chart 8 Iroubleshooting Flow Chart TX Circuit ES v Low TX power v No voice Check voice path No TX ormal TX powe supply Yes v TX LED fails Servic
10. i UM did e BIAS DOWN Na APC APC a d U401 1 LED e NV S D601 HA CS CE z DAC ADC i ENO EN1 EN2 EN3 a A S MCU m A E RESET gt MC9S08AC60 E 4 SDIO SCLK SEBN PDN DSP LV D4018D402 p an SDA SCL e es CSS CODE INT SDO due IRXON TXON SQ PDN y Y U101 RDA1846 V BAT 53 16 Schematic Diagram Schematic Diagram IF VCC VDD L110 1112 tuH c105 C106 cio7 0198 Bills 100p 1000p Ou 1 C103 C104 VDD 10p 10p R127 R128 1K R131 e rang VRCR 5 100 R142 DISCLK io wo o o seen U101 C132 C133 C134 RDA1846S 470p 470p 470p gt R133 100 s Em HIN css c 100 R135 CODE 100 R136 DINT 100 R137 SDO 100 R138 7PRXON 100 R139 22TXON E 100 Se 100 S gt PDN C117 C118 C119 C121 C124 C128 C129 C13 470p 470p 470p 470p 470p 470p 470p 470p CODE OUT IN C109 C110 vo 1000p 0 1u a gue RFOUT K L102 bii 0 C137 601s NC NC C115 cite c113 cim tu 0 1u 1000p 100p Lod 020 21 22 23 D656 R639 C669 C675 RB706F 40 1K 22P tu 1 C670 C671 1000P L 0 1u 54 Schematic Diagram MCU amp POWER TP108 A C285 SPK AFOUT gt n a C321 R310 220u 6 3V V_BAT 1u 2 2K U302 g R314 D657 D303 TDA2822D m 15k ADUCAM EpzTE616 8B B IN O1 4 3 O R605 R625 Gen B S201 R315 C332 Z R311 3 J3 pem 680 22K BAT BAT
11. your desired channel Power On Off Volume Control Knob Rotate the knob to turn the radio on off or to adjust the volume LED Indicator See the table below for LED and alert tone indications To enter Wired Clone Mode Source radio turn it on with MONI key The LED on the source radio flashes red once during held for approximately 2 seconds the power on process Target radio turn it on directly The LED glows red during cloning process Error occurs during cloning e Clone Mode At the start of cloning frequency mE band and Model ID will be checked The LED Status of the source radio in Wired glows orange for 2 seconds and then goes out to Clone Mode indicate a failed check If the check is After the target radio is turned on and successfully carried out but error occurs during the cloning cable is connected press cloning the LED will flash orange In this the PTT key of the source radio to mM l situation press any key to make it go out begin cloning Factory Clone Mode The LED flashes orange in presence of error Press any key to make it go out The LED glows green once cloning is completed e The LED glows green during cloning Status of the target radio in Wired Clone Mode e The green LED goes out after cloning is completed Product Controls Service Manual When the radio is turned on a power on alert tone sounds Power On to enter User Mode When the
12. 12102000 Multi layer chip inductor 12nH J 300mA 0 280hm RoHS 1 324 L101 3213306102000 Multi layer chip inductor 1uH K 25mA 0 60 RoHS 325 L110 B21 3213306102000 Multi layer chip inductor 1uH K 25mA 0 60 RoHS 326 L107 T1J 3221506601000 Ferrite bead 6000 100MHz 25 500mA 0603 RoHS 327 L108 3221506601000 Ferrite bead 6000 100MHz 25 500mA 0603 RoHS 328 L111 T2G 3221506601000 Ferrite bead 6000 100MHz 25 500mA 0603 RoHS 329 L112 B2H 3221506601000 Ferrite bead 6000 100MHz 25 500mA 0603 RoHS 1 330 L402 B3E 3221506601000 Ferrite bead 6000 100MHz 25 500mA 0603 RoHS 331 L527 B2F 3221506601000 Ferrite bead 6000 100MHz 25 500mA 0603 RoHS 332 L603 T4J 3221506601000 Ferrite bead 6000 100MHz 25 500mA 0603 RoHS 333 L604 T2l 3221506601000 Ferrite bead 6000 100MHz 25 500mA 0603 RoHS 334 L407 B3D 3221507221000 Ferrite bead 2200 100MHz 25 2000mA 0805 RoHS 335 L410 B2B 3221507221000 Ferrite bead 2200 100MHz 25 2000mA 0805 RoHS 336 L608 T3F 3221507221000 Ferrite bead 2200 100MHz 25 2000mA 0805 RoHS 337 L412 B2A 3231351640000 Air core inductor E2 0 35 1 6 4TL RoHS 338 L413 B2A 3231351640000 Air core inductor E2 0 35 1 6 4TL RoHS 339 L414 B1A 3231351640000 Air core inductor E2 0 35 1 6 4TL RoHS 340 L409 B2B 3231351680000 Air core inductor E2 0 35 1 6 8TR RoHS 341 D655 B4D 3302030500020 Zener diode 150 C SOD 323 RoHS 346 T
13. 2A LED red 200mcd 30mA 1 9V1 6X0 8mm RoHS 347 T3A LED green 40mcd 30mA 2 1V 0603 RoHS 26 Service Manual Parts List 1 3609042000020 Power management IC LDO 12V 3 3V 300mA RoHS 1 1 374 L511 3231301340000 Multi layer chip inductor 0402 22nH RoHS 375 L501 3231301340000 Air core inductor 0 3 1 3 4TR RoHS 376 L502 B2B 3503010000010 Air core inductor 0 3 1 3 4TR RoHS 378 D303 T5A 3399040600020 ESD protection diode VRWM 12V IPP 5A 10us RoHS 379 D403 B2C 3310990000160 ESD protection diode 10 5A 8 20uS 40 85 RoHS 380 D610 T2G 3310990000160 ESD protection diode 10 5A 8 20uS 40 85 RoHS 381 D613 B4A 3310990000160 ESD protection diode 10 5A 8 20uS 40 85 RoHS 382 D657 T5A 3310990000160 ESD protection diode 10 5A 8 20uS 40 85 RoHS 383 D658 B4D 3310990000160 ESD protection diode 10 5A 8 20uS 40 85 RoHS 384 D663 3310990000160 ESD protection diode 10 5A 8 20uS 40 85 RoHS 385 D664 3310990000160 ESD protection diode 10 5A 8 20uS 40 85 RoHS 386 MainPCBIT1584L4P 217 25 111 40 1 0 RoHS 2f Tuning Description Service Manual 7 Tuning Description 7 1 Required Test Instruments Radio communication test set HP8921 1 set 10V 3A regulated DC power supply 1 set Digital voltmeter 1 set Ammeter 1 set 7 2 Preparations Place the board to be tested on the test fixture please ensure good connection between each test poin
14. 4 7KO J 1 16W 0410 RoHS 100 R318 T4E 3001054790000 Chip resistor 4 70 J 1 16W 0402 RoHS 101 R201 TSE 3001054710000 Chip resistor 4700 J 1 16W 0402 RoHS 102 R217 T3F 3001054730000 Chip resistor 47KQ J 1 16W 0402 RoHS 103 R220 B5F 3001054730000 Chip resistor 47KQ J 1 16W 0403 RoHS 1 104 R312 T4E 3001054730000 Chip resistor 47KQ J 1 16W 0404 RoHS 1 118 123 C323 TOF 3104084750070 Tantalum capacitor 4 7UF M 16V S RoHS 124 C501 B2C 3101050200010 Chip Capacitor 2PF B 50V COG 0402 RoHS 125 C220 T2J 3101051030020 Chip Capacitor 0 01UF K 25V X7R 0402 RoHS 126 C322 TSF 3101051030020 Chip Capacitor 0 01UF K 25V X7R 0402 RoHS 127 C437 B2B 3101051030020 Chip Capacitor 0 01UF K 25V X7R 0402 RoHS 128 C457 B2B 3101051030020 Chip Capacitor 0 01UF K 25V X7R 0402 RoHS 129 C612 T2G 3101051030020 Chip Capacitor 0 01UF K 25V X7R 0402 RoHS 21 Parts List 1 Service Manual EE n 147 C422 T2D 3101051040060 Chip Capacitor 0 1UF K 16V X7R 0402 RoHS 1 148 C436 B2B 3101051040060 Chip Capacitor 0 1UF K 16V X7R 0402 RoHS 153 C521 B2F 3101051040060 Chip Capacitor 0 1UF K 16V X7R 0402 RoHS 1 22 Service Manual Parts List 1 177 C216 B5G 3101051020010 Chip Capacitor 1000PF K 50V X7R 0402 RoHS 1 8 C219 TSE 3101051020010 Chip Capacitor 1000PF K 50V X7R 0402 RoHS 191 C138 B1G 3101051010030 Chip Capaci
15. Bst 801051520000 ChpressortSKQJ 1 16W 0402 ROHS 1 Chip resistor 1 8KQ J 1 16W 0402 RoHS Chip resistor 100KQ E 1 16W 0406 RoHS Chip resistor 1000 J 1 16W 0402 RoHS dd I _ l Io _ _ TS a TS ar ras 826 3001051010000 Chip resistor 1000 J AMGW 0462 RoHS a LR gt e jA TS a R604 3001051010000 Chip resistor 1000 J 1 16W 0402 RoHS R615 3001051010000 Chip resistor 1000 J 1 16W 0402 RoHS R621 3001051010000 Chip resistor 1000 J 1 16W 0402 RoHS R129 3001051030000 Chip resistor 10KQ J 1 16W 0402 RoHS R130 3001051030000 Chip resistor 10KQ J 1 16W 0402 RoHS EN R219 3001051030000 Chip resistor 10KQ J 1 16W 0402 RoHS R428 3001051030000 Chip resistor 10KQ J 1 16W 0402 RoHS 19 an PR l ms la la A 2 TS Parts List 1 Service Manual 49 59 R632 B5G 3001051830010 Chip resistor 18KQ F 1 16W 0402 RoHS 1 3001051020000 Chip resistor 1KO F 1 16W 0402 RoHS 1 RSS BIE 3007051020000 Chip resistor TKA F 1716W 0402 ROHS 78 20 Service Manual Parts List 1 91 97 R645 T3H 3001054720000 Chip resistor 4 7KO J 1 16W 0408 RoHS R683 TA 3001054720000 Chip resistor 4 7KO J 1 16W 0409 RoHS R684 T3H 3001054720000 Chip resistor
16. C624 C623 H D 1000p 8 u D613 D615 D614 D605 7470p 470p 470p 470p 470p 470p T 470p T 470p C621 C649 1u ADUC ADUC ADUC ADUC 0 01u E a ni U619 Leos XC6209F502PR 5V 221s 4 vn vout c631 C664 vss L C611 C656 C606 0 01PWER gt 3 1 C640 C615 643 22U 16VZr 470p 0 1U 22u C680 1000P 0 01u 1u H1 H2 H3 H4 H5 H6 H7 H8 H9 R606 470p HD3P5X2P2 HD3P5X2P2 HD3P5X2P2 HD3P5X2P2 HD3P5X2P2 HD3P5X2P2 HD3P5X2P2 HD3P5X2P2 HD3X2P2 4 7k i 1 1 1 1 i 1 Schematic Diagram PA amp LNA W401 ANTENNA C404 R440 C409 L419 C414 L408 L417 L502 C425 6p 1 5k 18p 12nH 15p 2 2nH 2 2nH 4T 220P A SOT a A C435 C451 C439 C41 C418 C438 NC 30P C419 C448 C421 C423 C450 C449 D401 C410 R414 12p 12p C416 Q403 NC NC NC 10P NC 9p 5P 4 5P HVU131 15p 1k Q402 L406 270p RDDO7 L409 L411 1 RDO1 1uH ANA 8T 220nH R410 gt 5 gt EE R412 be VT R418 820 C413 q 270 gt 470p D403 C436 C437 C440 C417 0 1u 01u 470p L407 E R417 R416 0 1u R444 C412 R411 221s ADUC 1 8k gt 12k 270 Ge 0 33u 4 7k L410 470p e 221s gt gt cal po p C502 D503 D502 das 8p BA277 BA277 O II H R R H C453 C452 C457 Q404 BAT 0 1u 10u 16V Q9 01u G pon R423 eg lA al al A 470p 0 1u 16V 150k 1 R425 5 ke VT L 150k 1 j R424 br C454 1 470p R442 Herd 1 EMD22 470p gt R405 BAT 100K 470p 3 R426 R427 C445 470p BIAS DOWN
17. SW VOLUME i 10 470p gt 4 7K C323 IN VCC EA PJ D3027D L Y 4 22U 10V 6 2 E 2IN 02 O al a meta ni o R602 D601 D602 5 220k GREEN N N RED C614 C679 22U 16 V 470p a D655 V BAT C322 B 0 01U C327 C605 R603 R604 UDZS10 1000P 100k 100 Viu z BAT ou o Q605 C334 TXD C638 X60 MG3N 0 1u TP106 E 220D SSP T7 F 2 TP113 amp 2 La n BKGD MS R313 R312 R T O Q302 1K 47K C689 C688 R634 C673 C333 DTC114EE 100p 68p D608 0 470p 470P NC vcc U603 em R617 S R616 AT24C16 C639 47k 47k R618 Er SK1 47 i 4 CLK 3 PTT b dir BIAS_DOWN q E El R619 on NE T mo Yao css Yo S TP107 gt gt MIC IN C677 C667 c666 c678 us 470p 470p 470p 470p o 46 I 100P l MICJACK FER C314 Ka o R220 Q201 VROR amp e 4Tk 2SA1980E_ ak MIC C636 R645 C637 R644 B201 0 1u 47K Ou 4 7K R213 100k C216 PWERK 1000p APC lt lt C627 R684 C655 R683 681 0 1u 4 7K 0 1u 4 7K 470p I UICI INT CODE C665 C663 470p 470p SEBN PDN SDO VOX DET SDIO SDBEEP E R686 C657 R685 C630 5950 TX EN Lo __ 10K 4700P 10K vun dia c632 C634 a DITA Miu 470p 470p SW606 C658 C654 C653 C659 C662 C661 C660 L610 470p 470p T 470p T 470p 470p T 470p 470p uus pes o AS ti R690 R692 R691 1k U621 1k k XC6209F332PR L609 T Ss ia EE vit VOUT E AAA EAT MA ves 69 NC C609 C612 C613 Si C648 C647 C646 C652 1k C626 C625
18. VCO PLL LNA and RF IF RDA Chip Circuit DAC ADC vt I un DSP IL n U101 RDA1846 IC IN M Synthesizer Figure 2 The reference clock signal of RDA chip is provided by 26MHZ crystal oscillator The block diagram is 10 Service Manual Circuit Description given below a m DSP Core Audio filter Sub CH filter FM Modem AFC loop Switch PA_dr iver VCO AI GPIO cPic0 7 1 LDO E Syntheizer Ea n RDA 1846 Pe gt 4 8V DVDD Interfac e SPI RSSI PDN MCU XTAL After entering RDA chip via MIC the voice signal will undergo A D conversion to get digital signal which will be delivered to DSP for further processing such as filtering amplification amplitude limiting and pre emphasizing Then the resulting voice signal is modulated to the internal VCO and output after being amplified by the driver amplifier At the RX end the received RF signal will go to LNA for amplification first and then go to IF demodulation circuit to get demodulated voice signal After gain control such signal is converted into digital signal which will enter DSP for further processing such as fil
19. ange lt 1 45A to switch the and go to frequency under another test channel Rotate the Channel Selector knob Communi Press MONI Wide to channel 4 cation test key to adjust 650 50Hz CDCS Band Short press PTT s the value Press S to switch the BPF Antenna Then save MONI Deviat frequency under lt 20 connector E your change D ey ion test 300Hz and go to another channel 400 50Hz Following AF Genl Narrow wideband test LVI off Band long press PTT to perform 32 Service Manual Tuning Description Measurement Tuning iti Specifications Item Condition Test Instrume Test Point COMP Method Remarks onent nt narrow band test Short press PTT to switch the frequency under test Rotate the Channel Selector knob to channel 5 Short press PTT to switch the Low frequency Following wideband test Communi Press MONI long press PTT cation k j JP OCS ede band to perform Test Set p the value 675450Hz narrow band BPF Antenna Then save MONI Narrow band test 20 300H connector your change key 400 50Hz and go to Rotate the E Channel AF Genl Selector knob Lvl off another channel to channel 6 Short press PTT Medium to switch the frequency Following wideband test long press PTT to perform 33 Tuning Description Service Manual Measurement Tuning iti Specifications Condition Test i Instrume T
20. asizing gain control amplitude limit and D A conversion Then the analog voice signal is delivered to VCO and amplified to a signal with 8dBm When the RX RF signal enters this chip it would experience demodulation filtering de emphasizing and gain control Finally the signal is output to the audio amplifier e TX Circuit Circuit Description Service Manual The modulated RF signal from RDA chip goes to Q407 and Q402 for amplification and then further amplified by Q403 Then the amplified signal is delivered to low pass filter to filter out the high order harmonics Finally it is sent via the antenna e RX Circuit After going through LPF and amplitude limiter the RF signal received from the antenna enters Q501 LNA for amplification Then the BPF will filter the signal to remove other unwanted signals The resulting signal is delivered to RDA chip for demodulation After that the voice signal from demodulation is output U302 for amplification which is finally output from the speaker Power Circuit LDO U619 converts the 6V power supply into two 5V which LDO U621 will convert into two 3 3v power supplies powering VCC and VDD respectively VCC powers CPU while VDD powers RDA chip Then Q409 converts the 5V power supply to VT to power the TX circuit 4 2 Realization Methods of Basic Functional Modules 4 2 1 RDA Chip Circuit This chip is highly integrated lts function includes voice signal processing modulation demodulation DSP
21. ccording to TIA EIA 603 and subject to change without notice due to continuous development We endeavor to achieve the accuracy and completeness of this manual but no warranty of accuracy or reliability is given All the specifications and designs are subject to change without notice due to continuous technology development Changes which may occur after publication are highlighted by Revision History contained in Service Manual No part of this manual may be copied reproduced translated stored in a retrievable system distributed or transmitted in any form or by any means electronic or mechanical for any purpose without the express written permission of us 98 HYT is the trademark or registered trademark of Hytera Communications Corp Ltd 2012 Hytera Corp Ltd All Rights Reserved Address HYT Tower Hi Tech Industrial Park North Beihuan RD Nanshan District Shenzhen China Postcode 518057 http www hytera com L07157 2012 09 06 8130050000400
22. ctor knob to save the current AD sampling value About the Key press Short press key press time shorter than 1 second Long press key press time longer than 1 second Service Manual Circuit Description 4 Circuit Description 4 1 General Principle Diagram The general circuit is composed of RDA chip circuit TX circuit RX circuit power supply circuit control circuit etc See the block diagram below MIC B201 2 SP_JACK PJ D3027D SK MICJACK VOX_DET U613 al T BATTERY G602 T VOX DET N a lt mo A V pen 4 a z DAC AD yr ENO EN1 EN2 EN3 U622 C A z Nu y T 5 a MCU E E l d MC9SOSAC60 E vpo Lo lt gt ANT Lp P KE l SDA SCL a j DSP a 2 Li ARO CSS CODE INT SDO Po PTUSKWSK2 RXON TXON SQ PDN ch 4 4 U101 RDA1846 RX EN QE Swich DS eee rar BPFI Q408 Figure 1 e RDA Chip Circuit This chip is highly integrated Its function includes voice signal processing modulation demodulation DSP VCO PLL LNA and RF IF The voice signal from MIC goes to RDA chip for amplification Next the amplified voice signal will undergo a series of processing including A D conversion filtering pre emph
23. e Manual gt Replace D604 Check TX power supply Check TX VCO 38 MIC amp D102 No D604 glows red TX VCO locked Replace D604 v Check TX path v v v Check antenna Check APC connection Check Q402 Q403 control circuit and Q404 Service Manual RX Circuit No RX Troubleshooting Flow Chart Yes Replace RX LED D601 Normal RX No Check RX circuit circuit Yes No Normal RX LED Yes Correct RX No Change RX signaling signaling Yes No Normal speaker Replace ihe speaker Yes Normal audio No Check audio amplifier amplifier circuit Yes Normal volume No Replace the switch volume switch Yes CU U601 P8 work No Check or normally replace MCU Normal No e Check or replace demodulation CD501 and CF501 ormal IF mixer N CHECK UOTI as H Q502 XF501 XF502 ormal RF mixe No Check LO circuit VCO amp Q502 Yes Check BPF Yes Check antenna amp LNA Q501 connection 39 Correct RX No k A frequency di ange No Correct RX squelch level Change it Troubleshooting Flow Chart MCU ES Normal power up alert tone Yes
24. est Point COMP Method Remarks nt onent narrow band test Rotate the Channel Selector knob to channel 7 Short press PTT to switch the frequency Following wideband test long press PTT to perform narrow band test Adjust the power supply to 5 3V and press MONI Rotate the key to In case of TX Low Voltage Channel Digital Threshold sample it lt 5 3V 0 15V Selector knob voltmeter Then save TX is inhibited to channel 8 your change and go to another channel Max Rotate the Communi Press MONI TX Antenna Audio Channel cation key to adjust 4 3KHz 4 5K Earpiece Deviat Selector knob Test Set the value HZ ion Jack to channel 9 BPF Then save 34 Service Manual Tuning Description n Specifications Item Condition Test Instrume Test Point Remarks onent Short press PTT lt 20 15K your change to switch the HZ and go to frequency AF Genl another channel Following wideband test Narrow long press PTT Band to perform narrow band test Note Note Make sure that the antenna or load is connected before tuning rotating the Channel Selector knob will save the value automatically Measurement Tuning Compo nent RX Tuning Items Specifications Method Remarks Item Condition Test Instrument Test Point Adjust the power supply to 5 6V and press MONI 5 6V 0 1V the red LED Rotate the RX Low Power Channel Power key to flashes and
25. ode signal and squelch level signal to control circuits of high low power switch audio power amplifier RDA chip power supply RX power supply and 14 Service Manual Circuit Description TX power supply for programming to communicate with PC via RXD TXD based on the RS232 protocol and transmit receive data to from PC RDA Chip Control By controlling the RDA chip the MCU can realize these services frequency setting frequency bandwidth reference clock sleep mode SQ VOX squelch frequency deviation voice filtering signaling encoding decoding pre emphasizing gain control amplitude limiting de emphasizing etc Audio Amplifier The audio signal output from U622 is amplified by the audio power amplifier U302 to drive the speaker directly 4 2 5 Power Supply Section Block diagram of power supply circuit is shown as below lt pwen we wm V_BAT LDO U619 TX_EN Figure 6 LDO U619 converts the 6V power supply into two 5V which LDO U621 will convert into two 3 3v power supplies powering VCC and VDD respectively VCC powers CPU while VDD powers RDA chip Then Q409 converts the 5V power supply to VT to power the TX circuit 15 CPU Pins Service Manual 5 CPU Pins 7 PTF3 TPM1CH5 CSS kee Je Cae on 16 PTE3 TPM1CH1 CODE I O Detection pin CDCSS status output Detection pin modulated digital signal input out
26. or knob locates And the LED will glow red or green according to the specific tuning item Or connect a programming cable to the radio for real time tuning in PC Programming Mode 7 6 2 Description of Tuning Items You can use MONI key to select your desired values 7 6 3 Specific Operations and Requirements Note By default channel 1 2 3 4 and 5 use wide band while channel 6 7 8 9 and 10 use narrow band Remember to connect the antenna properly gt Press PTT MONI key to turn on the radio Measurement Measurement Tuning iti Specifications Condition Test i Instrume Test Point COMP Method Remarks nt onent Press MONI Tuning Items for TX key to adjust Rotate the Communi the value Channel Antenna Freq Tolerance cation test Then save lt 150Hz Selector knob connector set your change to channel 1 and go to another BT Tuning Description Service Manual iti Specifications Item Condition Test Instrume Test Point COMP Method Remarks nt onent Rotate the Press MONI Channel key to adjust Selector knob the value UHF to channel 2 Then save Low 2 0W 0 3W your change Short press PTT Lei 1A to switch the and go to frequency under Communi another Press TX test cation Antenna ane MONI Power Rotate the Test Set connector Press MONI Channel STEE key to adjust Selector knob the value to channel 3 Then save 3 3W 0 2W High Short press PTT your ch
27. ou can manually tune the frequency deviation power level and squelch level and etc Description of Tuning To enter Manual Tune Mode Hold the PTT and MONI key for 2 seconds while powering on the radio The LED glows orange to indicate that the radio has entered the Manual Tune Mode When the keys are released the radio will enter item N of Tx group N depends on the position where the Channel Selector Knob locates Note To enter the Manual Tune Mode make sure its switch is set to Open via the programming software If this option is unchecked the radio can not enter this mode which helps avoid change of parameters and degradation of radio performance caused by user s misoperations Keep this option unchecked after values are well adjusted from factory to avoid any unexpected change of values Such values can only be reset and changed in Manual Tune Mode only To switch between TX Tuning items and RX Tuning items Rotate the Channel Selector knob to switch between TX tuning items and RX tuning items The LED glows red for TX tuning items and green for RX tuning items To switch between tuning items within TX group RX group e TX group CH1 CH9 respectively represent TX Low Power TX High Power CDCSS Balance CDCSS Deviation CTCSS Deviation low CTCSS Deviation medium CTCSS Deviation high TX Low Voltage Threshold and Max TX Audio Deviation e RX group CH10 CH13 respectively stands for SQL Normal Open SQL Normal Close R
28. out 12dB Next the BPF will remove the interference signal in amplified RF signal Then the resulting signal goes to RDA chip for further processing The processed signal is delivered to U302 for amplification and finally output by the speaker 4 2 4 MCU Control Signal Processing and Audio Amplification Circuit diagram of this section is shown as below 13 Circuit Description MIC B201 2 BAT r O Service Manual SP JACK J3 PJ D3027D MICJACK VOX DET U613 D656 L ti P LU A BATTERY LL LED G o a o SPK e D602 a y a LED m D601 P a lt Z Z ENO EN1 EN2 EN3 Y U622 7 MCU RESET gt MC9S08AC60 SDIO SCEK SEBN PD E2ROM H 4 SDA SCL CSS CODE INT SDO SS IRXON TXON SQ PDN Figureb MCU Control Circuit MCU control circuit is composed of MCU EEPROM keys etc This section has the following functions to initialize data of the radio and save data to EEPROM to detect battery voltage and signals from external keys LD and VOX and to make response to transmit required data to PLL based on the channel encoding status to switch and control RX TX based on the input PTT signal to switch the squelch circuit on off based on the input signaling dec
29. put SPI port of communication SPI port of communication Service Manual CPU Pins EI Ros La mw EE Lm wn OT M elsa EE CENE C ONE Bi ES CEN ON Lm m heu s jme T Ls CE n M ix on EC a a Cue lean non sie ESC e C CES Lu rec EN a CT e ERC CIT Ca bum ER ESTO a Jemen ees ome own 17 CPU Pins Service Manual a msn m La Jess a Je e foi o TO frames E mmm e Jesse meme o ei a rumes Jess o fee a a f f met mem ome ver faro 0 omar maa een Tele O a De m rm 18 Service Manual Parts List 1 6 Parts List 1 IFA Description ty aia 120 3009080396000 Gip resistor0 300 J AW 1206 RoHS 1 3 mazo TaC 3009080396000 Chip resistor osoa J AW 1206 RoHS 1 3 Rei 128 3009080396000 Chip resistor osoa AW 1206 RoHS 1 L102 B3E 3001060000000 Chip resistor 00 J 1 10W 0603 RoHS 6 Loto TaG 3001060000000 Chip rester DA J 1OW 0605 RoHS 7 crar BRE 3001050000000 Crip resistor oa sew osoz ROHS 1 amp Ta en 3001050000000 Chip resistor oa J 176w 0402 ROHS Tan en 3001050000000 Crip resistor oa enee 10 A k sch l k l k l k l k R520 B1F 3001050000000 Chip resistor 00 J 1 16W 0402 RoHS a Ress Bx 3001050000000 chip resistoroa N16W 0402 ROHS 1 L5 Rete B2c_ 3001051220000 Chip resistor 1 20 nn enna 1 16 reso
30. radio is currently on a blank channel it sounds beep tones continuously The LED flashes red and the low pitched tone Low Battery Alert sounds every 20 seconds programmable by the dealer The LED glows red during transmitting When TOT timer expires the radio sounds beep Transmitting tone continuously A TOT pre alert tone sounds before the TOT timer expires Receiving The LED glows green during receiving The LED flashes green once per second during scanning S e Scan Start Alert programmable by the dealer canning one beep will sound Scan End Alert programmable by the dealer two continuous beeps will sound The LED glows red when the PC is reading data from the radio Writing Reading The LED glows green when the PC is writing data into the radio A low pitched tone sounds when the radio switches from high power to low power Power Adjustment A high pitched tone sounds when the radio switches from low power to high power One audio alert for enabling VOX Channel Lock Two audio alerts for disabling Service Manual Software Specifications 3 Software Specifications 3 1 Function List e Channel Capacity 1 16 e Channel Spacing 25KHz 12 5KHz e Channel Scan e RX TX status indication red green LED e CTCSS CDCSS 38 groups of CTCSS 83 groups of CDCSS and CTCSS Tail Invert by 180 degrees Low battery alert e Battery Save e Unlock Detection and Emergency Ala
31. rm e 2 Selectable Squelch Levels e Monitor Button e Time out Timer TOT e Squelch Tail Elimination e PC Programming manual automatic tuning e High Low Power Switch 4 0 2 0W e Wide amp Narrow Bandwidth Compatible e Wired Clone e Battery Strength Indicator e Manual Tuning Note Note indicates optional functions 3 2 Programmable Key Functions You dealer can assign any of the following functions to MONI key None e Monitor Button e Monitor Momentary Software Specifications Service Manual e Scanning e Squelch Off e Squelch Off Momentary o Power Adjustment Battery Strength Indicator 3 3 Description of Modes 3 3 1 User Mode It is a conventional communication mode The radio will enter this mode by default after power on 3 3 2 PC Programming Mode The radio in User Mode enters PC Programming Mode through specific protocol based communication with the programming software In this mode radio functions and adjustment parameters can be set through the programming software including User Version and Factory Version 3 3 3 Wired Clone Mode Description Wired Clone Mode is an independent mode To access other modes you must restart the radio Wired Clone Mode includes Clone Mode and Factory Clone Mode e Clone Mode Connect two radios using a cloning cable Power on the source radio while holding MONI key the radio will enter Clone Mode in approximately 2 seconds Then directly power on the targe
32. t and the fixture and connect the board to a power supply with DC voltage of 6 0V 7 3 Wired Clone 7 3 1 Instructions Connect two radios using a cloning cable Simultaneously hold MONI key to power on the source radio so that the wired clone mode will be entered after 2 seconds and then press MONI key to switch to factory wired clone mode when the wired clone mode is entered the user wired clone mode is defaulted then directly power on the target radio to enter the user mode The LED flashes red once after the source radio enters Wired Clone mode Press PTT to clone data to the target radio During communication the LED of the source radio glows red and the LED of the target radio glows green When the communication ends green LED of the source radio glows and the green LED of the target radio goes out which indicates the preparation for another clone If any abnormal situation occurs during communication the source radio will flash orange LED and will stop communication for another cloning When cloning ends the source radio goes back to the standby status Press PTT again to begin another cloning operation 7 3 2 LED Indication during Cloning Orange LED flashes an error occurs during cloning In this case press any key other than the power switch to turn it off Green LED glows the cloning is done successfully 28 Service Manual Tuning Description 7 3 3 Difference between Factory Clone Mode and Clone Mode
33. t radio to enter the User Mode In this mode data stored in EEPROM of the source radio will be cloned to EEPROM of the target radio The data transferred only involves channel data and common parameters excluding tuning data version and serial No of the model e Factory Clone Mode Connect two radios using a clone cable Power on the source radio while holding MONI key the radio will enter Clone Mode in approximately 2 seconds Press MONI key afterwards to switch to Factory Clone Mode The target radio can be directly turned on to enter user mode The data transferred covers all data in EEPROM including settings for the Manual Tune Switch other than the serial No Process e TheLED flashes red once after the source radio enters the Wired Clone Mode Press PTT to begin to clone data to the target radio Service Manual Software Specifications e During cloning LED of the source radio solidly glows red and LED of the target radio solidly glows green When cloning is completed LED of the source radio solidly glows green and the green LED of the target radio goes out which indicates the preparation for another clone e If any abnormal situation occurs during cloning the source radio will stop cloning and its LED will flash orange which indicates the preparation for another clone e When cloning is completed the source radio goes back to standby status Press PTT again to begin another clone 3 3 4 Manual Tune Mode In this mode y
34. tering amplification and de emphasizing The function of RDA is subject to MCU U622 and its reference clock signal is from 26MHZ crystal oscillator This chip is applicable to UHF 400 520MHZ and VHF 134 174MHZ The NF can be up to 3dB and IIP3 up to 6dBm meeting GB and FCC requirements lts RF output may reach up to 8dBm 4 2 2 RF Power Amplifier Circuit TX Section The block diagram of the RF power amplifier circuit is shown in the figure below 11 Circuit Description Service Manual PA PA PA Q407 Q402 Q403 25C3356 RDO1 RD07 BIAS DOWN apo APC U401 BAT ere Figure 3 The modulated RF signal from RDA chip goes to Q407 and Q402 for amplification and then further amplified by Q403 Then the amplified signal is delivered to low pass filter to filter out the high order harmonics Finally it is sent via the antenna The control signal VT is used to control the operation of driver amplifier Q407 and Q402 U401 works for auto power control APC 4 2 3 Receiver Circuit RX Section The Block Diagram of RX Circuit is shown as below Service Manual Circuit Description V mp ap Figure 4 The RF signal is received via the antenna After going through LPF and amplitude limiter the signal is amplified by Q501 LNA The LNA adopts 25C3356 with current 5mA and its gain is ab
35. tor 100PF J 50V COG 0402 RoHS 1 192 T2E 193 B4D 194 BSD Parts List 1 Service Manual Ce ET ee O Te 218 C631 B3F 3101062250000 Chip Capacitor 2 2UF K 10V X5R 0603 RoHS 219 C431 B2A 3101062490000 Chip Capacitor 2 4PF B 50V COG 0603 RoHS 220 C526 3101052790060 Chip Capacitor 2 7PF B 50V COG HQ 0402 RoHS 221 C425 B2B 3101062210000 Chip Capacitor 220PF J 50V COG 0603 RoHS 222 C427 B3A 3101062210000 Chip Capacitor 220PF J 50V COG 0603 RoHS 223 C638 B3l 3101052200010 Chip Capacitor 22PF J 50V COG 0402 RoHS 224 C639 B3J 3101052200010 Chip Capacitor 22PF J 50V COG 0402 RoHS 225 C669 B5G 3101052200010 Chip Capacitor 22PF J 50V COG 0402 RoHS 226 C329 T4F 3101102260010 Chip Capacitor 22uF Z 10V Y5V 1206 RoHS 227 C416 B3C 3101062710000 Chip Capacitor 270PF J 50V COG 0603 RoHS 228 C515 3101050200010 Chip Capacitor 2PF B 50V COG 0402 RoHS 229 C423 B3B 3101060200010 Chip Capacitor 2PF B 50V COG 0603 RoHS 230 C434 B1A 3101060200010 Chip Capacitor 2PF B 50V COG 0603 RoHS 231 C430 B2A 3101063690000 Chip Capacitor 3 6PF B 50V COG 0603 RoHS 232 C432 B2A 3101063690000 Chip Capacitor 3 6PF B 50V COG 0603 RoHS 233 C451 B4B 3101063000010 Chip Capacitor 30PF J 50V COG 0603 RoHS 234 C428 B3A 3101060300010 Chip Capacitor 3PF B 50V COG 0603 RoHS 3101064590010 Chip Capacitor 4 5PF C 50V COG 0603 RoHS 1 236
36. tput Skip CICSS CUCSS Low Skip LTCSS UCDCSS High Et CICSS High Pass Filter Et CDCSS High Pass Filter Calibrate Wide 5 Open Calibrate Wide SQ Close Calibrate Harrow SQ Open Calibrate Harrow SU Close Wide Noise Detect Low Harrow Noise Detect Low zug Hormal EE ad Normal 3 3 3 a a 46 42 e Squelch On Off to set the threshold value for enabling disabling the squelch function e Calibrate Wide Narrow SQ Open Close to tune the squelch threshold to compensate the circuit difference It is recommended to apply the same value to one model Increasing the value may tighten the squelch while decreasing may loosen it 30 Service Manual Tuning Description e Skip RX TX High Low Pass to configure the audio filter 0 not skip 1 to skip one filter 2 to skip the other filter 3 to skip two filters e Pre emphasis to configure the pre emphasis function O Skip CTCSS CDCSS High Low to set whether to skip CTCSS CDCSS filter e RX CTCSS CDCSS High Pass Filter to configure the parameters of CTCSS CDCSS filter e Wide Narrow Noise Detect High Low to configure the noise detection threshold 7 6 Method and Procedure 7 6 1 Description of Tuning Procedures Simultaneously hold PTT MONI and Power On Off Key for more than 2s to enter tuning mode LED flashes orange After the keys are released the radio will enter the tuning item in this mode the item entered depends on the position where the Channel Select
37. uble sided tape to the front case Step 2 Install the PTT key into its place from the inner side of the chassis See Figure 6 Figure 6 9 5 Assembling the Battery Place the battery into the battery slot until a click is heard as shown below 43 Disassembly and Assembly Service Manual 44 Exploded View Service Manual 10 Exploded View 30 45 Parts List 2 Service Manual 11 Parts List 2 Cee Deep Gy UC Ta EURE fesa Ls s m HT Ls emma ice 2 Lt emm eme I sl see je ET HE CEE EE TETE Ls non frei 1 TT E ET To E DEE a ET DT EM DT E CT o mma ie CIN a wan 4 De memes ee E CINE a DT OT To Es SES 7500114000000 Heat sink pad 46 Service Manual Parts List 2 No am EN coro ann TOT ENA on pere EN Taa E Taa a reno o s 6201022000000 Battery cathode piece a mmm se Dm emo mm a amem fu m ewe ue e meme e n m errore cree 1 Lu mmm aen m mmm mes Cu mmm en one Co E Ca eus joua E fel ss nee i Ce ewm Ta OT Pm 6300010000000 Metal bracket for belt clip aT ema eleme name TOT EN _ 6000053000020 Bottom case of battery 47 Parts List 2 Service Manual 6201738000000 Battery anode and cathode piece 7500154000000 Sponge pad of battery 48 Service Manual Packing Guide 12 Packing Guide Ca Antenna Radio Unit AP Documentation Kit AS Package Box o VA
38. x Low Voltage Threshold and Bandpass Filter The LED solidly glows green during RX group tuning CH10 CH13 CH14 CH16 are unavailable and LED will go out 7 Software Specifications Service Manual To switch between wide and narrow bands Under a certain tuning item long press the PTT key the LED flashes orange to indicate valid press to switch between wide and narrow bands After the band is selected the first frequency of the current band is the frequency for tuning by default To switch the frequency Under a certain band short press the PTT key the LED flashes green to indicate valid press to switch the frequency orderly To tune the value Under a certain band short press MONI key to increase the value in step of 1 or hold this key to increase the value continuously in steps of 1 When it reaches the maximum value pressing MONI key again would increase the value from 0 Special tuning items e TX group CH8 represents TX Low Voltage Threshold which is related to AD sampling Press the MONI key after entering the above item to activate AD sampling including calculation once Rotate the Channel Selector knob to save the current AD sampling value e RX group CH10 CH12 represents SQL Normal Open SQL Normal Close and RX Low Voltage Threshold respectively These items are related to AD sampling Press the MONI key after entering the above item to activate AD sampling including calculation once Rotate the Channel Sele
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