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TC-320 Service Manual

1. 1 PTT Push to Talk 4 Volume Adjust 2 SK Side Key 3 Speaker Keys Key 5 Microphone 6 Nameplate 7 Charging Terminal 8 Antenna 10 Channel Status 11 Channel Selector 12 Charge 9 Power Switch Indicator Knob Indicator 13 Accessory Jack 14 Accessory Jack 15 Mini USB Jack 16 Strap Hole Cover 17 Screw Belt Clip 18 Belt Clip 19 Rear Cover 20 Battery Latch HT TC 320 Service Manual Software Specifications Status Indications Operations Functions LED Indications and Alert Tones Power on the source radio while holding down SK and the LED flashes red once To enter Wired Clone mode Turn on the target radio directly The LED glows red during cloning process Error occurs during cloning a User Clone Once clone begins frequency band and radio ID Model ID will be checked The LED glows orange for 2 seconds and then goes out to Status of the source radio indicate a failed check If the check is successfully After the target radio is turned Wired Clone carried out but error occurs during data cloning the on and the cloning cable is Mode LED will flash orange In this situation
2. 46 Exploded VieW 49 Parts List 2 ee nnn nnne eene nre nennen nee eene OO enun 53 Packing Diagram 55 POD 5 a E a js ai 96 Level Diagram 58 Block Diagram 59 Schematic Diagram 60 SpecificationS 66 HT TC 320 Service Manual Part No Date of Description Issue 8130032000000 2009 4 Initial Release 8130032000010 2010 9 Circuit Description Schematic Diagrams PCB View Level Diagram Block Diagram Parts List 1 amp 2 and Specifications are updated Copyright Information Hytera and HYT are trademarks or registered trademarks of Hytera Communications Co Ltd Hytera in PRC and or other countries or areas Hytera 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 Hytera product d
3. Mol PartNo bDescriptin_____________ Oty RefNo PrintNo Remark 3001050000000 Chip resistor oQ J 1 16W RoHS 1 L510 sen 2 8001050000000 Chip resistor oQ J 1 16W RoHS fa fri 736 3 9001050000000 Chip resistor oQ J 1 16W RoHS Lilian 4 3001050000000 Chip resistor oQ J 1 16W RoHS 1 R527 BzH 5 8001051000020 Chip resistor 100 F 1 16W RoHS 1 R101 BA _6 8001051000020 Chip resistor 100 F 1 16W RoHS 1 R108 BG 7 8001051000020 Chip resistor 100 F 1 16W RoHS freno Br _8 8001051000020 Chip resistor 100 F 1 16W RoHS Pa ram TBA 9 8001051000020 Chip resistor 100 F 1 16W RoHS R429 BF 10 3001051000020 Chip resistor 100 F 1 16W RoHS el 11 3001051000020 Chip resistor 100 F 1 16W RoHS 1 R530 BAG 12 3001051010040 Chip resistor 1000 F 1 16W RoHS 31 R604 mE 13 3001051010040 Chip resistor 1000 F 1 16W RoHS 31 Rota me Chip resistor 1000 F 1 16W RoHS La R621 me _15 soo1051010040 Chip resistor 1000 F 1 16W RoHS 1 R623 me 16 3001051020000 Chip resistor KQ F 1 16W RoHS riws ber 17 8001051020000 Chip resistor 1KQ F 1 16W RoHS rwo9 bee 18 3001051020000 Chip resistor KQ F 1 16W RoHS reo7
4. 348 3210305150010 Multi layer chip inductor 15nH J 300mA 0 32ohm RoHS 1 L504 B2H C 27 a KP Le LUS EN PAN EN jan as la a NG HT TC 320 Service Manual Mol PartNo Description Qty Ref No Print Nol Remark 351 3210305220000 multitayer chip inductor 22nH J 300mA 0 42ohm RoHS 1 L111 Bar 352 8210305220000 muttitayer chip inductor 22nH J 300mA 0 420hm RoHS 14 1114 B36 353 8210305220000 Multi layer chip inductor 22H J 300mA 0 420hm RoHS 1 L401 B28 354 s210305220000 Multilayer chip inductor 22nH J 300mA 0 42ohm RoHS 1 L404 Bsr 355 8210305220000 Mult layer chip inductor 22nH J 300mA 0 420hm RoHS 1 L416 B2F 358 3210305101000 Multitayer chip inductor 100nH J 150mA 1 26ohm ROHS 1 1517 B2 359 8210305101000 Multitayer chip inductor 100nH J 150mA 1 25ohm RoHS R509 T2G 360 8210305101000 Multitayer chip inductor 100nH J 150mA 1 250hm RoHS R510 T2G 361 s210305101000 multilayer chip inductor 100nH J 150mA 1 250hm RoHS 1 R513 mo 363 8210306479000 Multilayer chip inductor 4 7nH S 450mA 0 20ohm RoHS 1 L405 een _ ge 364 3210306479000 Multi layer chip inductor 4 7nH S 450mA 0 20ohm RoHS L408 U1 pi 1 L408 U2 U1 D 3D 365 3210306569000 Mutti layer chip inductor 5 6nH S 430mA 0 200hm RoHS 1 366 R414 367 368 3213306561000_ Multi layer chip inductor 0 56uH K 35mA 1 550 Q 15 RoHS 1 1411 B2B
5. 369 3213306102000 Multi layer chip inductor 1uH K 25mA 0 60 Q 35 RoHS 1 L110 Bas 370 3213306102000 Multi layer chip inductor 1uH K 25mA 0 60 Q 35 RoHS 1 L201 T4D 371 3213306222000 Multi layer chip inductor 2 2uH K 15mA 1 150 Q 35 RoHs 1 L509 B3H __ 372 8213306332000 Multi layer chip inductor 3 3uH K 15mA 1 550 Q 35 RoHS 1 L102 B4E 373 3213306332000 Multi layer chip inductor 3 3uH K 15mA 1 550 Q 35 RoHS 1 L103 B4E 1374 3221506601000 Bead 6000 100MHz 25 500mA RoHS 1 L101 B 375 3221506601000 Bead 6000 100MHz 25 500mA RoHS 1 L106 spe 376 8221506601000 Bead 6000 100MHz 25 500mA RoHS 1 L107 BAH 377 8221506601000 Bead 6000 100MHz 25 500mA RoHS 1 L108 ee 378 3221506601000 Bead 6000 100MHz 25 500mA RoHs 1 L109 BAG 379 3221506601000 Bead 6000 100MHz 25 500mA RoHS 1 L113 pse 380 3221506601000 Bead 6000 100MHz 25 500mA RoHS 1 L202 tso 381 3221506601000 Bead 6000 100MHz 25 500mA RoHS 1 1417 s 382 3221506601000 Bead 6000 100MHz 25 500mA RoHS 1 L602 t 383 3221506601000 Bead 6000 100MHz 25 500mA RoHS st L603 rp 384 3221506601000 Bead 6000 100MHz 25 500mA RoHS A L605 me Bead 6000 100MHz 25 500mA RoHS 386 Bead 600 100MHz 25 3000mA RoHS Bead 600 100MHz 25 3000mA RoHS 1 L601 TAB Be
6. MS YA ODA JALILA dliddia cota TOTO Ay311vg Q ava L OT 0Id cOI Sq Sq LA MS co9n INO XL 5 LNO 10 ZETO cota AY Z0SO TOSO DAN Goon 7090 MS ZZS5D S ASNA TIYO EGGI MS SISU Tosao NIOSO NSZ IC TOS ASNE LOLLX N LO9X ab 0 INO TIAN TIO XI 42 ATIEEON TSEOASTAEN ITODA L A aH L09n Jav WL IZ goon TOTN LNO DIS AT zosa TISTPLIN dWV JI 0S0 6 dWV Ju d w dd MS MD 41S WIVA LOOMS 9 HAMOd p q S ro LOS4X lt gd MS COWS av Saus o MOd XO T k INO GOW Co Jav TOPA dd MS dn OT WOOMS o 10949 EOSJYMS XIN E ad MS Z09MS ol NOW NOW TOSGA FO dd MS 09MS ol Ild z194 Lid 8090 aon N TO on Tord OH INO XI S NA VNN3 LNV 004 909MS LOPM ZAN Adi anv AV ANY 43H anv dud Joyeods voon SIN ipa a Loza DUYVHO ZTOZL oca ANY yoga DON OdVH NN weibeig 19019 026 21 ug 9459 dootL ZLSO do gt UA gt 044 1LSV88WSH gosa Odv gt HNL sly1 VNN3 LNV LOVM door 9182 9GESSI Losa doooL E ELO E 39111910 _ SOLO LELOAH YOL nio OLLUM soLa 62188 cola LELOAH 9190 dan HUSI 2615 zal 095 ozLu 9ZZbOSZ P Xt gro AJ a very dot LELOAH VS9bJAH LELDAH DI eosa ZOSIMVS _ sosa A7 8 KE LELOAH d9 HUZ p HES 667 e161 Huzz von doLr LELOAH LELOAH doze LLYO zosa vest jaH posa nL0 0 _ 001 LOSAMVS cebu 6059 0159 0 ES
7. 1 c554 BH 272 8101054720000 Chip capacitor 4700PF K 50V RoHS 1 C561 BAH 273 8101054720000 Chip capacitor 4700PF K 50V RoHS 1 C647 te 274 8101051030020 Chip capacitor 0 01UF K 25V RoHS 1 C138 se 275 8101051030020 Chip capacitor 0 01UF K 25V RoHS 1 C437 ee 276 3101051030020 Chip capacitor 0 01UF K 25V RoHS i cs Be 277 3101051030020 Chip capacitor 0 01UF K 25v RoHS i ceso tH 278 3101051030020 Chip capacitor 0 01UF K 25v RoHS fa c513 me 279 8101051030020 Chip capacitor 0 01UF K 25V Rons 1 C514 ml 280 8101051030020 Chip capacitor 0 01UFK25V RoHS 1 cso B3 281 8101051030020 Chip capacitor 0 01UF K25V RoHS 1 C552 m3H 282 8101051030020 Chip capacitor 0 01UFK25V RoHS 1 C559 TSH 283 8101051030020 Chip capacitor 0 01UFK25V RoHS 1 C607 tao Chip capacitor 0 01UF K 25V RoHS 1 ce i2 TD 285 3101051030020 Chip capacitor 0 01UF K25V RoHS 1 C635 tre 286 3101051030020 Chip capacitor 0 01UF K 25V RoHS 1 C637 trr 287 3101051030020 Chip capacitor 0 01UF K 25V RoHS 1 css zc 288 3101051030020 Chip capacitor 0 01UF K25V RoHS 1 css zc 289 3101051030020 Chip capacitor 0 01UF K 25V RoHs 1 C656 ze 290 8101052230000 Chip capacitor 0 022UF K 16V RoHS 1 C550 T3H 2
8. 192 3101051010030 Chip capacitor 100PF J50V RoHS 1 C152 BOE 193 3101051010030 Chip capacitor 100PF J50V RoHS 1 C202 s 194 3101051010030 Chip capacitor 100PF J50V RoHS 1 C512 B2B 195 3101051010030 Chip capacitor 100PF J50V RoHS 1 C516 BE Chip capacitor 100PF J 50V RoHS 1 cs23 pH 197 3101051010030 Chip capacitor 100PF J50V RoHS 1 Ce14 re 198 3101051010030 Chip capacitor 100PF J50V RoHS 1 C629 mE 199 3101054710010 Chip capacitor 470PF K 50V RoHS 1 C142 se 200 3101054710010 Chip capacitor 470PF K 50V RoHS 1 C147 sr 201 3101054710010 Chip capacitor 470PF K 50V RoHS 1 C209 zp 202 3101054710010 Chip capacitor 470PF K 50V RoHS Lille Chip capacitor 470PF K 50V RoHS 1 cao pe 204 3101054710010 Chip capacitor 470PF K 50V RoHS 1 C410 sr 205 3101054710010 Chip capacitor 470PF K 50V RoHS pifo sr 206 3101054710010 Chip capacitor 470PF K 50V RoHS 1 C416 B3D 207 3101054710010 Chip capacitor 470PF K 50V RoHS 1 C424 B2D 208 3101054710010 Chip capacitor 470PF K 50V Rons 1 C426 ra 209 3101054710010 Chip capacitor 470PF K 50V RoHS 1 C440 Bsa 210 3101054710010 Chip capacitor 470PF K 50v RoHs C443 TB 211 3101054710010 Chip capacitor 470PF K 50v RoHS Lil te 212 3101054710010 Chip capacitor 470PF K50V RoHS 1 C445 tra
9. Disassembly and Assembl Disassembly 1 Power off the radio 2 Remove the belt clip 3 Remove the battery a Push the battery latch upwards b Remove the battery cover C Take out the battery by lifting its bottom side gt AGE m Al Us e 3 4 Remove the antenna 46 HT TC 320 Service Manual 5 Remove the Channel Selector knob nut and waterproof ring a Detach the Channel Selector knob cover b Unfasten the screw c Remove Channel Selector knob d Remove the nut and waterproof ring 6 Disassemble chassis of the radio and the cover of PTT key a Unfasten the 4 screws on the chassis b Lift the bottom of the chassis c Pull the chassis out d Remove the cover of PTT key 47 HT TC 320 Service Manual 7 Disassemble the main PCB a Remove the two fixing screws on the PCB b Remove the PCB and supporting ring of the Channel Selector knob c Beware of t
10. 2611001 ES zova POPO ecval vere S109 JEVESISZ OLLZAXIISVE 3AVS A LELOAH 9011 LOLO boua nio Yo L YOS L KA KA Yo L X0SL Ga ZZVO Get 9190 _ de E MOL 9GESSI dz Es ELDY Losa Z090 S SLO9 l _ _ sk l VAN A dozy h azz dooot Ly dozy _ Ba doit SE n y IL Zeen Ly UY lt SH8 9203 LI U Se eopu OLYO e gru Live cord 2 E F3 SES dozy ng ol npo AOLML DR d0001 dozv de orro evo aer Elro BM ak OO Ak GOYO LOTO altu LA ju OH HNL a _ M _ GLVY a A S1 y u SE SE 19 orra 9ccvoSsc IN HN9S O 18 Pa 9091 mee Lovo AJ LLY 6011 ON Ov1 oee del dzi dr g snWwz0qua d6 840EMSZ 6010 FOE cvO rO 6170 8LvO goro SLO ZOvO VNN31NV d0001 Them doooL 0 dozy Hug S HUL b dzy LObM eero LEVO LEVI Lora SCvO vive 9LYO 8091 sor voro ON ON 9171 6370 44 wesbeig onewoyo S ZIN oze oL as 9Zas O 9a Ino DINK oM FEVESIST 8090 xoA lt lt nzz 0 N8 NOL N Y 3E nyo doook _ ML Grau 1099 2099 099 7090 0794 07 490249 o zL9d dooor p T 695 NG T 2 1V8 A doootL n d000k ngg aooo nioo A S009 0299 1299 1190 8199 8099 T ngg k 1091 SES 0199 YA SyLLVSZ QLOPZLV Z090 T DLO0 Coon org NLO O L door 999 ut ZINOA INI L 1 3311100 FR lio a a SOS Ha soen AT F ZE8LVSZ 9 LLO6 LY dooor ng 2090 coon 9199 S190 4v R lv S ly S O09 Ce 093 61945 8194 4 9091 LA Sr LVSZ aatilo1a a e JE
11. 430 NPN transistor 12V 100mA RoHS NPN transistor 12V 100mA RoHS a Q506 B3H N MOSFET VDS 10V ID 500mA VGS th 0 7V RoHS BRT Vce 50V Vloff 0 3V Vlon 1 4V 70mA RoHS 404 434 BRT Vce 50V Vloff 0 3V Vlon 1 4V 70mA RoHS 1 o2 Te 1485 1341000100020 PNP transistor 15v 500mA 135 600 RoHS 1 aeot el 436 1341000100020 PNP transistor 15v 500mA 135 600 RoHS 1 Q602 rm 437 1430108000020 Momentary contact switch 12VDC 0 05A RoHS 1 Sweot tsa 438 4301080000090 Momentary contact switch 12VDC 0 05A RoHS 1 Sweo4 TIB 29 O O O O HT TC 320 Service Manual No PartNo Description Qty Ref No Print Nol Remark 439 4301080000090 Momentary contact switch 12VDC 0 05A RoHS 1 sweos TID 1440 8602999000000 Audio amplifier 1W 2 2 5 5V 62dB RoHS 1 U301 BA 441 605008005070 Operational amplifier3 32V 300mW 10048 RoHS 1 U401 t 1442 s610999000060 SCM 100Pin RoHS tf sot T9 1448 3609049000010 Power management C LDO SV 300mA RoHS 1 ueoz moo 444 9612031000510 Memory EEPROM 16KB 1 8 5 5V RoHS 1 U603 me 445 3609006000000 Reset IC 27v ROHS U605 TEE 1446 8701212540030 TCXO 21 25MHz 2 8 3 0V 1 5ppm RoHS 1 xmo B4G 447 e201648000000 VCO shielding mask 0 30mm 00 RoHS T ol 448 6201651000000 Filter shielding mask 0 20mm 00 RoHS 1 L 449 700018300000
12. 5 Attach the battery a Insert the battery b Attach the battery cover 50 TC 320 Service Manual 6 Attach the belt clip 51 TC 320 Service Manual Y o o O 2 x LLI 52 HT TC 320 Service Manual T arts List 2 PatNo Hes sty PCS 6201658001010 Encoder knob cover RoHS 000 1 6201658001010 Encoder knob cover RoHS 2 7102006000100 Machine screw M2 0 6 0mm 3 6000718100000 Encoder knob RoHS 7206007400000 Fixing nut of encoder switch RoHS 5 6100335000000 O_RING for antenna RoHS 1 T 12 Cable RoHS E 14 Battery discharging piece RoHS 2 Kir T T u OJ 53 itch 7 6000796100000 aki guide onal natn RoHS O HT TC 320 Service Manual Baa AN a 5002230000010 MIO ROHS A MIC cover silicone rubber RoHS a EREECHEN Las e0007a200101 Fontease ROHS A 46 6900062001010 Decorative sheet ank akey ROMS a o 6100366000000 PTT kay icon aber ROHS A Las Lemmer PTT kay ROHS A CAT Note Parts that are not marked with part number may vary with radio frequency band sesch 54 HT TC 320 Service Manual Gift Box SIOA A Na FS ON F o 39 V7 Ki RI O0H000 07 001Y N d j s H 19A PJDOGUIDW O7 91 Gazon aij pt tte po papapapo av Jo e do L M IA dOd 0ZE IL eieiei TC 320
13. 89599 EZGY p o 18 9 Huge 1999 dc Hus den d 6234 GEN 9zecvosc 15O LIST _ SO _ _ S0SO SLY LV 0SO 30ZF lt NI 3Y 1198 dlz ON ON dl 1199 nL0 0 1091 Z161 d000L 075 nez 6 99 6097 di HUOL 0 HUOOL GG 7191 309r34qH 0197 1181 OSIMVS Huzz 9161 dost OL 1089 91994 nvo da n Z8 96590 999 928 a w q 0 HA SLL1 Jr 11d weibeig onewaouos L N OZE OL do gt lu gt NI ODAKX AQLING L X x SILO OK I nio nio Hug LLI 9119 Ni 48 lt door 2117 EZ 2919 0LLM AL Lv 6014 LLL 244 I I ma 09S OL pon BS Gen 2014 1LSV88NSH L gosa d j j Ao Lp E 5 IzZHISZ P pk Ko AL Y go A 7 331010 00Ld L us WYP veta dOL COLO ZL6N LELOAH VS9HJaH LELOAH SLO 9150 eosa ZOG MVS _ sosa eg LELOAH S109 0epu f touf LELDAH dez nio 9L LH sold doo doo HUZ P ZL9a SrO _ z180 9150 ELST ul EZ von dozy Ge LELOAH LELOAH dour Ltr zosa vest jaH vosa dt _ _ 001 Bind do LOSAMVS cery 6089 x 9OSEDAH 01 52 OL cold bold zora n HUOOL 62724 HNE E ELE FIVL LOLO las 7 iin 011 Loso A dozy den dol Hnc g 9080 2010 zon 8099 Se aOSEOAH rel ln doLr d 3AFLLIVIG Huez zi 2080 dA aayiiolaj Q3 EOF POL 9019 SOO A JAYS A lt dow nyo ASL Odv gt L H00L 1 M0SL nouns HOL NT orio 6074 8078 do001 i n Xv doool nio o AN CH Tei oe as 9zaa AES JA LIVIG YOGZINFN
14. BUSY SOL TX CIL Figure 5 13 HT TC 320 Service Manual 2 4 1 MCU Control Circuit MCU control circuit is composed of MCU EEPROM keys and 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 decode signal and squelch level signal to control circuits of high low power switch audio power amplifier VCO power supply RX power supply and TX power supply for programming to communicate with PC via RXD TXD based on the RS232 protocol and transmit receive data to from PC 2 4 2 Signal Processing Section a TX Baseband Processing The audio signals input from MIC are divided into two flows One flow serves as the signal of VOX detection by Q508 and D612 the other enters U601 and then is converted into digital signal by analog to digital conversion ADC Afterwards the digital signal will go through a series of processing including low pass filtering AGC companding high pass filtering encrypting and pre emphasizing Finally the signal is processed by the active low pass filter and then sent to VCO for modulation after it is converted by digital to analog conversion DAC b RX Baseband Processing
15. e 19 8001051020000 Chip resistor KQ F 1 16W RoHS Limal rp 20 3001051020000 Chip resistor KQ F 1 16W RoHS 1 R3o9 TAD 21 3001051020000 Chip resistor KQ F 1 16W RoHS r6a re 22 3001051020000 Chip resistor 1KQ F 1 16W RoHS 31 R637 tse 25 3001051020000_ Chip resistor 1KO F 1 16W RoHS tt R645 tso 26 3001051030000 Chip resistor 10KQ J 1 16W RoHS tt R107 sel 27 3001051030000 Chip resistor 10KQ J 1 16W RoHS a R116 s Chip resistor 10KQ J 1 16W RoHS 1 real T2D cc 29 3001051030000_ Chip resistor 10KQ J 1 16W RoHS 1 Root ra 30 3001051030000 Chip resistor 10KO J 1 16W RoHS Feo t 3001051030000 Chip resistor 10KO J 1 16W RoHS A RE ser 32 3001051030000 Chip resistor 10KO J 1 16W RoHS tt R428 t 33 3001051040000_ Chip resistor 100KO F 1 16W RoHS R113 B3E 34 3001051040000 Chip resistor 100KO F 1 16W RoHS A R120 Bs 35 3001051040000_ Chip resistor 100KO F 1 16W RoHS ina ro 36 B001051040000 Chip resistor 100KQ F 1 16W RoHS 1 R424 T38 37 3001051040000 Chip resistor 100KQ F 1 16W RoHS 1 R427 TzA 38 3001051040000 Chip resistor 100KQ F 1 16W RoHS tt R433 eee 39 3001051040000 Chip resistor 100KQ F 1 16W RoHS tt R504 tam 40 3001051050000 Chip resistor 1MQ F 1 16W RoHS R218 ro 41 8001051050000 Chip resistor 1MQ
16. press any key connected hold down PTT of other than the Power Switch to turn it off the source radio to begin b Factory Clone If error occurs during data cloning cloning the LED will flash orange until you press any key other than the Power Switch to cancel it Once cloning is completed the LED will glow green And if the battery runs low in Clone mode the LED will flash red The LED glows green when cloning is in progress Status of the target radio The green LED goes out once cloning is completed When the radio is turned on an alert tone sounds and the LED flashes orange once Power On to enter User Mode When the radio is currently on a blank channel It sounds beep tones continuously When the radio is turned off the power off alert tone Power Off is heard HT TC 320 Service Manual The LED flashes red and a low pitched tone sounds Low Battery Alert every 10 seconds The LED glows red during transmitting When the TOT timer expires the radio sounds beep Transmitting tones continuously A TOT pre alert tone sounds before the TOT timer expires The LED flashes green once every second during the scanning process Scan Start Alert programmable by the dealer one beep Scan End Alert programmable by the dealer one beep The LED glows red in reading data Writing Reading The LED glows green in writing data A low pitched tone is heard when the radio switches from high
17. 6zve it 3371100 Y oso A i dozy 9 L s109 B eu doub ee HA aaruoia Na 070 SorO A E 3AVS A no ASL L XOOL Yo L HOSL HOL WS 6074 8079 1 N0GL ZEN ae ozaa AES JA LIVIG vOGZINPN 261 4001 20rd POPO 8zvel Agel ni 96 NOS L LO 7790 L N0GL Ezry SZYN ma dz LOSO Z0SO T TT Lv S D LOST dozy At dl jen t 9279 dozr Nal LO AOLINL kA Otto Tero SEVI _ daro di y dz Siri LA it _ _ _ _ Siru Hngg o E Em Em T 1g P Lt 6071 di det del diz azSnwzody ezro eso DV 8LYO oro doooL LELNAH dooor ceva LEVI LYO Lora SCYO Huzz ON 9171 6670 JH wepe 90001 ZIVI HU6 Viv ZH T sizz T Z071 P N dooor g8 9703 Lir ELVI m EE ZI VU LV ge Otu 9071 dee 840EMSZ SLYO zovo doze Hu y HUZ p 9LvO 8071 sor onewou s L N OZE OL Aging A GLLO H nio nyo LL Ss MZZ OLLY AL Lv 60LY LILY HOL ZOLY O AD OOldL SLO9 otit door LELO do x 9OSEDAH ima a 2 Hne 011 den do Hng g 601 9 2010 aoscoAu A Lola HUZZ del voni 9019 lt GOW nony Oto doool Hio uy SOON no o AD ch f eero 881 SLO9 FEPEGISZ OLLZAX9LSVA F 9011 LOLD told 3AVS A a NOL eit SLO9 2141 LY dozr _ cory olro dozr dz G0tO LOYO EH ozzvosz NN mr Lovo NA ON Lob1 oee 6070 vOv dzy voro FEVESIST 8090 A8 156 NO d00ok X6 XOAK a nzz0 egou _ XL SON 6190 ZZ 1099 2099 099 P090 AN Ov9u 0b 490 89 geen w z19a
18. C130 gets invalid in RX mode Q103 is turned on and C130 gets valid Note If the PLL is unlocked the LD pin of U101 outputs low level If the microprocessor detects such situation TX RX operation is prohibited and an alarm sounds 2 2 RF Power Amplifier Circuit TX Section The block diagram of the RF power amplifier circuit is shown as below 11 HT TC 320 Service Manual PRE AMP RF AMP RF AMP LPF NIA W402 ANTENNA e e e in R419 R420 VT R421 V_BAT Sw SW APC U401 APC 0404 Figure 3 The modulated carrier signal from VCO is pre amplified by Q104 and Q406 and controlled at D617 and D616 Then it is processed by the front stage amplifier Q401 the pre driver amplifier Q402 and the final stage amplifier Q403 respectively Afterwards the amplified RF signal enters the low pass filter LPF circuit through diode D401 and then is transmitted via the antenna after ultroharmonics are removed APC circuit is composed of Q404 Q405 and U401 U401 controls the bias voltage at the gates of Q402 and Q403 to control TX current and to further regulate power 2 3 RX LNA and Mixer Circuit RX Section The block diagram of the RX circuit is shown as below LEF gt MADE _ ANTENNA MIN SWWAFSOS CFS02 LO D501 DAD m MC 3361P i E 4 1 D505 WA DU D503 15 2 RFC AF Figure 4 12 HT TC 320 Service Manual Desired and undesired RF signals received via the antenna are fed to the bandpass filter composed
19. CH1 to CH9 stand for 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 Deviation of TX Audio respectively The LED solidly glows red when adjusting items CH1 to CH9 RX group CH10 to CH12 stand for SQL On 5 SQL Off 5 and RX Low Voltage Threshold respectively 7 HT TC 320 Service Manual The LED solidly glows green when adjusting items CH10 to CH12 CH13 to CH16 are invalid and the LED goes out indicating that no adjustment item is carried out 4 To switch between wide and narrow bandwidth In adjusting a certain item short press SK the LED flashes orange to indicate valid press to switch between wide and narrow bandwidth After this operation the first frequency of the current bandwidth is the frequency for adjustment by default 5 To switch frequency Short press PTT the LED flashes green to indicate valid press to switch frequency one by one under certain bandwidth and adjustment item 6 To increase decrease adjustment value under certain bandwidth and adjustment item Short press under certain bandwidth and adjustment item and the adjustment value will increase in steps of 1 hold down and the adjustment value will keep increasing in steps of 1 The adjustment value will remain unchanged once it reaches the allowed maximum value Short press under certain bandwidth and adjustment item and the adj
20. Capacity Channel Spacing 25 KHz 12 5KHz Operating Voltage 3 8V DC Battery 1700mAh Li lon battery Battery Life 5 5 90 Duty Cycle gt 10 hours 20 C 55 C Operating Temperature Dimensions HxWxD with standard battery without antenna 100mmx48mmx2 mm Weight with standard antenna amp battery 135g Frequency Stability 2 5ppm Receiver Sensitivity lt 0 25uV 25KHz 0 316uV 12 5KHz Adjacent Channel Selectivity 60dB W 50dB N Intermodulation 255aB Spurious Response Rejection 255dB W 2 50aB N Rated Audio Power Output 0 4W Speaker impedance 8 ohm Rated Audio Distortion lt 5 0 4W Transmitter RF Power Output 2W 0 5W Spurious and Harmonics lt 26dBm Modulation Limiting s5 2 5KHZ TX SIN gt 38dB W 34dB N Modulation Distortion lt 5 Note All Specifications are tested according to TIAJEIA 603 and subject to change without notice due to continuous development 66
21. Chip capacitor 470PF K 50V RoHS 1 cse TB 214 8101054710010 Chip capacitor 470PF K 50v RoHS 1 C447 z Chip capacitor 470PF K 50V RoHS 1 c40 pc 0 Chip capacitor 470PF K 50V RoHS A c504 ee 217 8101054710010 Chip capacitor 470PF K 50V RoHS 1 C506 re 218 3101054710010 Chip capacitor 470PF K50V RoHs 1 c509 sxs 24 raul Luz I I I I IS l l l DPD Lk Ri Lk 17 as la a la la as la a a Le HT TC 320 Service Manual No PartNo Description Gty Ref No Print Nol Remark 219 8101054710010 Chip capacitor 470PF K 50V RoHS 1 C522 BAH Chip capacitor 470PF K 50V RoHS 1 c524 BH 7 221 8101054710010 Chip capacitor 470PF K50V RoHS 1 css BAH 222 8101054710010 Chip capacitor 470PF K 50V RoHS 1 cs62 BSH 223 8101054710010 Chip capacitor 470PF K50V RoHS 1 C601 tra 224 3101054710010 Chip capacitor 470PF K 50V RoHS 1 Ce11 mE 225 3101054710010 Chip capacitor 470PF K 50V RoHS 1 ce22 m pon Chip capacitor 470PF K SOV RoHS 1 ces3 TA 227 3101054710010 Chip capacitor 470PF K50V RoHS 1 C624 mB 228 8101054710010 Chip capacitor 470PF K 50V RoHS 1 C625 TA 3101054710010 Chip capacitor 470PF K 50V RoHS 1 cs m 230 8101054710010 Chip capacitor 470PF K 50V RoHS 1 cost me 231 3101054710010 Chip capacitor 470PF K 50V RoHS
22. F 1 16W RoHS R405 mes 42 3001051230000 Chip resistor 12KQ J 1 16w RoHS reaj re 20 Ss E TP HT TC 320 Service Manual Mol PartNo Description Oty RefNo PrintNo Remark 43 8001051230000 Chip resistor 12KO J 1 16W RoHS fa R528 Bac 44 3001051530000 Chip resistor 15KO J 1 16W RoHS R406 ta 45 8001051530000 Chip resistor 15KO J 1 16W RoHS R607 re 46 8001051540000 Chip resistor 150KQ F 1 16W RoHS 1 R422 T3A 47 8001051540000 Chip resistor 150KO F 1 16W RoHS tt R423 T3B 48 3001051540000 Chip resistor 150KO F 1 16W RoHS tt R425 T3B 49 3001051540000 Chip resistor 150KO F 1 16W RoHS tt R426 BA 50 3001052220000 Chip resistor 2 2KO J 1 16W RoHS A RO B4E 51 3001052220000 Chip resistor 2 2KO J 1 16W RoHS Lila T2D 52 3001052220000 Chip resistor 2 2KO J 1 16W RoHS tt R216 T3D 53 8001052220000 Chip resistor 2 2KO J 1 16W RoHS R507 BSH 54 8001052220000 Chip resistor 2 2KO J 1 16W RoHS R508 nl 56 8001052220000 Chip resistor 2 2KO J 1 16W RoHS tt R615 nl 60 3001052230010 Chip resistor 22KO J 1 16W RoHS pa R215 T3D 61 3001052240010 Chip resistor 220KO F 1 16W RoHS A R602 te 62 3001052240010 Chip resistor 220KO F 1 16W RoHS tt R603 tre 63 3001052710010 Chip resistor 2700 J 1 16W RoHS 1 R115 BEJ o 64 8001052710010 Chip resistor 2700 J 1 16W RoHS
23. J 50V RoHS 1 cara BF 166 3101051000020 Chip capacitor 10PF J 50V RoHS 1 C439 ser 167 3101051000020 Chip capacitor 10PF J 50V RoHs 1 C448 ee 168 3101051000020 Chip capacitor 10PF J 50V RoHS 1 C452 sse Chip capacitor 10PF J 50V RoHS 170 171 3101051000020 Chip capacitor 10PF J 50V RoHS 1 C556 B4G Chip capacitor 47PF J 50V RoHS alcsal BD I78 8101054700010 Chip capacitor 47PF J 50V RoHS 1 C315 BAH po 174 8101054700010 Chip capacitor 47PF J 50V RoHS nes BE 23 HT TC 320 Service Manual Mol PartNo Description Oty RefNo PrintNo Remark 1793101051500020 Chip capacitor 15PF J 50V RoHS tt cese me 180 3101051500020 Chip capacitor 15PF J 50V RoHS tt ceso t 183 3101053300000 Chip capacitor 33PF J 50V RoHS tt C526 s 184 3101051010030 Chip capacitor 100PF J50V RoHS 1 C117 ee 185 3101051010030 Chip capacitor 100PF J50V RoHS 1 ott bar 186 8101051010030 Chip capacitor 100PF J 50v RoHS 1 C121 sr 187 8101051010030 Chip capacitor 100PF J 50v RoHS 1 C124 BF 188 3101051010030 Chip capacitor 100PF J50V RoHS A C125 se 189 3101051010030 Chip capacitor 100PF J50V RoHS afcr gas s A Noon NEN IS a n 190 3101051010030 Chip capacitor 100PF J50V RoHS A C131 sel 191 3101051010030 Chip capacitor 100PF J 50V RoHS 1 C150 BOF
24. Lili Bea 65 8001052710010 Chip resistor 2700 J 1 16W RoHS Lili BSH 66 3001052730010 Chip resistor 27KO F 1 16W RoHS Pa rial T4F 67 8001052730010 Chip resistor 27KO F 1 16W RoHS Lili ta 68 8001053310010 Chip resistor 3300 J 1 16W RoHS Lil B2E 69 3001053320000 Chip resistor 3 3KO J 1 16W RoHS A R203 me 70 3001053320000 Chip resistor 3 3KO J 1 16W RoHS A R204 me 71 8001053320000 Chip resistor 3 3KO J 1 16W RoHS A R401 B2F 72 3001053320000 Chip resistor 3 3KO J 1 16W RoHS A R402 B2E 77 8001053920010 Chip resistor 3 9KO J 1 16W RoHS R431 Bae 78 8001058220000 Chip resistor 8 2KO J 1 16W RoHS R606 mc 79 8001053920010 Chip resistor 3 9KO J 1 16W RoHS R633 tse 80 8001054790000 Chip resistor 4 70 J 1 16W RoHS R308 ra 81 8001054790000 Chip resistor 4 70 J 1 16W RoHS Lil ra 82 8001054790000 Chip resistor 4 70 J 1 16W RoHS R403 BE 83 3001054700000 Chip resistor 470 J 1 16W RoHS A Ran se 84 3001054700000 Chip resistor 470 J 1 16W RoHS Lili se L85 8001054700000 Chip resistor 470 J 1 16W RoHS tt R618 T4G 86 3001054700000 Chip resistor 470 J 1 16W RoHS Lt Fe T3G 21 HT TC 320 Service Manual No PartNo _____ Description jGty Ref NojPrint No Remark 187 3001054710000 Chip resistor 4700 J 1 16W RoHS C 1 R201
25. M 0599 s009 p 1091 T T d D e i 1V8 A P Gow LK ON doooL ng d000k nga aooo DLC S009 der La d d N89 LO9YA 0299 een 1190 8199 4090 ni 2091 tl Gi MEE TEA Ge 20991 9190 ECHO vz909 32929 9299 d E AL6 SYLIYSZ z S RON E TO SEI z090 9LOvCLV dozy tt 4 NGI nL0 0 go 2094 I eon 2 2299 I Gro NLO O Ao 4 AL U 97901 x DIEN 8098 EN AL ALY ano Na L gt 0193 vez a di ad 31010 Fa no ES Loa jouueyo MS v090 A Xt 909MS 8799 E 991 9198 GA VIN ZE8LYSZ OP LLO6 LY ano I Lv 8193 1 Lv 6194 S L09 OJA 9091 Yo1 M0ZZ d000 09H 0 092 ZZU dooor ni 1090 coon 9199 S190 xv SS d0Zt Fe 0894 39995 LA GvLLVSC 337 LOLA S090 1090 ss E KACKEN e LAK ULL cou LW A ai gt 001 viva 7094 Be nzzo o Zv90 mo DIN IV 3AVSA lt lt Xt 9024 Gow 10 Tong Pu NO N Y VLLZOZLLEY det l det 9020 goon 699 and 8899 001 ezou l nio 4129 LO9X dvo Td LIVIX O1VLX Leg dooor E X asna 9LZO 1004 OLcELHS vqqA a ON ON UA 1028 909 6090 Loon XOA K XOA ze8lvsz 3 BEI C LOZO Odv Odv HE 938 O38 E 019G La19 aq DIN S109 S091 SLO9 h doz Z091 6020 88 9Zd3 ino INC a 2094 DOA h dozy nzzo Hn goeu ag 9zaa d lid 7690 8070 1021 Loea ces L c09MSQ NOM a ZOOM OAK I ON ED ng Mont nyo ZZ gogo enen 0899 S06
26. PCB View Bottom Layer TI e KEK CH En o r Bin gt Bug H o Lk FI BZ v9 e F R O E t pr a Le ER OT a O a o po 6171 4202 J201 0402 6090 909 ug a Sag F iu E o E GOTH 6079 LS IEEE 8 zora vall SA Pd l e gt S go org BOLA il Y Ee LA EN o lt oy id B4 ka E er Een El O cr JTE HJAR P Rb ia Q a Oba Ban an yi HET SOG4MVS En a E 1053X 57 LOVM apet dd man SUAS vq a ca ve e r 2 SUUAWOBL je L LOEN ap9c va eq ca lt apre coro O 8 leift kg 71 ga ze d DH SUJAUWOOS Jo 0 S Loon wgpzo apzi UdP0c L0G3X gpz Wgp40 L WUdPO L 9070 ape GOSO lt SWINW99 SAN VIqnyve gq se Lat99A e SWIAUZI g Zj za ze 9 S o hbkl V W 4 Wgps 9oL Loon Loca E udpo vel E0SMVS ueibelq 19491 02 91 VJ c0S LOSMVS uonoes KL wgp z uap0Z dd1 LOPM Uuol 99S XH ad JAYS A MS XA XL MALTIA dOO T O
27. amp Lili Ba 310 3101051040060 Chip capacitor 0 1UF K 16V RoHS 1 C528 sse 311 3101051040060 Chip capacitor 0 1UF K16V RoHS 1 C537 mas 312 8101051040060 Chip capacitor 0 1UF K 16V RoHS 1 C546 sxs 313 8101051040060 Chip capacitor 0 1UF K 16V RoHS 1 C555 BAH 1814 8101051040060 Chip capacitor 0 1UF K 16V RoHS 1 C557 m Chip capacitor 0 1UF K 16V RoHS 1 cseo t 316 3101051040060 Chip capacitor 0 1UF K 16V RoHS amp 1 ceos Bac 3101051040060 Chip capacitor 0 1UF K 16V X7R RoHS 1 C amp 4 MD 318 3101052240010 Chip capacitor 0 22UF Z 10V Y5V RoHS 1 c20 tso 319 3101052240010 Chip capacitor 0 22UF Z 10V Y5V RoHS 1 cess tso 320 3101052240010 Chip capacitor 0 22UF Z 10V Y5V RoHs 1 ces3 tao 321 3101051050000 Chip capacitor 1UF K6 3V RoHS 1 C203 THE 322 Chip capacitor 1UF K 6 3V RoHS 324 3101051050000 Chip capacitor 1UF K6 3V RoHS 1 C547 B3G 325 3101051050000 Chip capacitor 1UF K6 3V RoHS 1 ce27 me 326 3101051050000 Chip capacitor 1UF K6 3V RoHs 1 C628 me 327 3101051050000 Chip capacitor 1UF K6 3V RoHS 1 Ce3o BE 328 3101051050000 Chip capacitor 1UF K6 3V RoHS 1 Ce34 tme 329 3101064740000 Chip capacitor 0 47UF K 25V RoHs 1 C302 m38 330 310
28. i ce32 t 232 3101054710010 Chip capacitor 470PF K 50V RoHS i ce33 me 2333101054710010 Chip capacitor 470PF K 50V RoHS Ci css me 234 3101054710010 Chip capacitor 470PF K 50V RoHS i coat TB 235 8101054710010 Chip capacitor 470PF K 50V RoHs 1 Ce44 ro 236 8101054710010 Chip capacitor 470PF K 50V RoHS 1 C657 TD 237 8101051020010 Chip capacitor 1000PF K 50V RoHs 1 C102 ese 238 8101051020010 Chip capacitor 1000PF K 50V RoHS 1 C105 s 239 8101051020010 Chip capacitor 1000PF K 50V RoHS 1 C111 BG 240 8101051020010 Chip capacitor 1000PF K 50v RoHS 1 C120 BAH 241 8101051020010 Chip capacitor 1000PF K 50v RoHS 1 C126 BAH 242 8101051020010 Chip capacitor 1000PF K 50V RoHS 1 C133 s 243 3101051020010 Chip capacitor 1000PF K 50V RoHS 1 C139 BSE 244 8101051020010 Chip capacitor 1000PF K 50V RoHS pifo pz 245 3101051020010 Chip capacitor 1000PF K 50V RoHS 1 C145 BSE 246 3101051020010 Chip capacitor 1000PF K 50V RoHS 1 C215 Bar Chip capacitor 1000PF K 50V RoHS La cam Tp 7 248 3101051020010 Chip capacitor 1000PF K 50V RoHS 1 C219 man po 249 3101051020010 Chip capacitor 1000PF K 50V Rons 1 C412 B2D 250 3101051020010 Chip capacitor 1000PF K 50V RoHS 1 C413 sa 251 3101051020010 Chip capacitor 1000PF K 50V RoHS 1 C417 sc 252 810105
29. power to low power Power Adjustment A high pitched tone is heard when the radio switches from low power to high power The alert tone sounds once if the feature is enabled Monitor VOX The alert tone sounds twice if the feature is disabled Description of Modes User Mode It is a conventional communication mode The radio will enter this mode if you turn it on directly 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 HT TC 320 Service Manual through the programming software including User Version and Factory Version The operation procedures are as follows 1 Install PC programming software and its driver dedicated for TC 320 before your initial use 2 Connect the USB port of PC with the Mini USB jack of the radio using a programming cable 3 Turn on the radio 4 Launch the programming software to perform reading or writing operation Note 1 When reading writing data is in progress red green LED glows when reading writing data is completed red green LED goes out 2 During the operation if any abnormal situation occurs or no reply is given within a period the reading writing operation will fail and an error message window will pop up Wired Clone Mode 1 Description Wired Clone Mode is an independent mode To access other modes you must restart
30. resistor 47KO J 1 16W RoHS 1 R630 ts Chip resistor 47KO J 1 16W RoHS 1 Rex TK 109 3001054730000 Chip resistor 47KO J 1 16W RoHS 1 R638 me 110 3001054730000 Chip resistor 47KO J 1 16W RoHS 1 R643 ze 111 8001054740000 Chip resistor 470KO J 1 16W RoHS a Retz B3H 112 8001054740000 Chip resistor 470KO J 1 16W RoHS A R519 BAH 118 8001056830000 Chip resistor 68KO J 1 16W RoHS 1 R12 BAH 114 3001056830000 Chip resistor 68KO J 1 16W RoHS 1 Rt24 Bar Chip resistor 68KO J 1 16W RoHS 1 R127 BF 0 116 3001056830000 Chip resistor 68KO J 1 16W RoHS 1 R302 BA 119 3001056830000 Chip resistor 68KQ J 1 16W RoHS 1 R642 zp 120 3001056840000 Chip resistor 680KO J 1 16W RoHS 1 R501 B3H 121 122 123 3001060000000 Chip resistor 00 J 1 10W RoHS 1 L105 sr 1124 8001060000000 Chip resistor 00 J 1 10W RoHS L115 sw 125 3001061010000 Chip resistor 1000 J 1 10W RoHS 1 R418 T2B 126 3001061010000 Chip resistor 1000 J 1 10W RoHS 1 R605 T3A 1273001066820000 Chip resistor 6 8KO J 1 10W RoHS 1 R416 s 128 8001061020010 Chip resistor 1KO J 1 10W RoHS 1 R416 B2D 129 3001064700000 Chip resistor 470 J 1 10W RoHs 1 R410 sd 130 3001064700000 Chip resistor 470 J 1 10W RoHS a Rats BBC 2
31. ro 88 3001054710000 Chip resistor 4700 J 1 16W RoHS 1 R503 T3H 89 3001054720000 Chip resistor 4 7KO J 1 16W RoHS la R112 se 90 3001054720000 Chip resistor 4 7KO J 1 16W Rons 1 R20 T3G 91 3001054720000 Chip resistor 4 7KO J 1 16W RoHS 1 R434 Br 92 3001054720000 Chip resistor 4 7KO J 1 16W RoHS a rant B2H 93 3001054720000 Chip resistor 4 7KO J 1 16W RoHS a Reti2 BE Chip resistor 4 7KO J 1 16W RoHS 1 R525 po Chip resistor 4 7 KO J 1 16W RoHS 1 Re8 tc 96 3001054720000 Chip resistor 4 7KO J 1 16W RoHS 1 Rez2 rc 97 3001054730000 Chip resistor 47KQ J 1 16W RoHS 1 R100 BSE 98 8001054730000 Chip resistor 47KO J 1 16W RoHS 1 R20 z 99 3001054730000 Chip resistor 47KO J 1 16W RoHS R217 rap 100 3001054730000 Chip resistor 47KO J 1 16W RoHS Reto TAB 101 3001054730000 Chip resistor 47KO J 1 16W RoHS 1 R611 TB 102 3001054730000 Chip resistor 47KO J 1 16W RoHS 1 R612 TB 103 3001054730000 Chip resistor 47KO J 1 16W RoHS Cf R616 TAG 104 3001054730000 Chip resistor 47KO J 1 16W RoHS a R617 TAG 105 3001054730000 Chip resistor 47KO J 1 16W RoHS 1 R620 ras 106 3001054730000 Chip resistor 47KO J 1 16W RoHS 1 R624 me 107 3001054730000 Chip
32. roeo A S d zooq doz plan eozdl iva NT po OYNSBOYI LdY A3aY via s109 h Ges Loza 2085 en p Pen JOSS0NL LAN NTFIYI 097 DIN d a m m NMOQLNKHS r d k Se 9 Zv zozdil Z m i Je _ 99 tas Sech troo NMOGI pgo T dn 3 NON LO9MS 909 MS 709 MS ON bs aR 9094 Q Loza a 2 LY 0687dY ag 9Zaa 8090 3 O OLEY LOEN O O a m a do001 A0L NZ y M 6 O HP ps dooo nouns a men 1599 9099 Held 1381 0790 EPO nio DASZ NIA va ueoL T EZOVEOIN E 909n iva A Soe LED 49MOd8NOW Weibeig oanewayos LIN OZE OL C9 gt do ds do GYO dz cSvoO 440 ON GESH do02t do02t 1999 rSSO C NFOOA NG _ dozy HUZZ do nro X X 0610 vI 1420 9EGY PECH dont dooL 00L 00L 6119 EZIS GELO PELO _ 3L LOLNY YI al 089 _ Jr aaa NAN iya SLGH y EA A A YI nro uy O i i U U 2 His LESI UIJX Ur v RM dozy 18 9 R Er e99 vien 99A doo dA ELO dooot 1NO0SO NI9SO lt 3AVSA SLZO ngyn v A LO X ISC03SLAW AL 04v O N votu Ob 390 8Y en Tan K Ino 10 6190 0ZLy Xcc ANE9MOL NO 9 40SFNA4TY OL toltu ZELO MOLD OS4O g0L3 d000k _ 9Z19 S O9 cor ON O ON HWZ IZ ZE ON LEG LOSJX coca _ 9eZHISZ T 042 dozr 9050 Y ee nyo 90683 Z9IGI 0969 9299 d8L9 oN _ _ _ 9989 8091 F d000L oe aadA 8159 KO ng 85 1780 SL09 VA OL SOSH 8 ON n YA 0 Giel E 7 8 99 _ _ 9 9 HUOL SN 8091 YO 0001 SL 1288 ON
33. the radio Wired Clone Mode covers User Clone Mode and Factory Clone Mode 1 User Clone Mode Connect two radios using a clone cable Power on the source radio while holding down SK and it will enter User Clone Mode after 2 seconds The target radio can be directly turned on to enter 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 adjustment data version and serial No of the model 2 Factory Clone Mode Connect two radios using a clone cable Power on the source radio while holding down SK and it will enter User Clone Mode by default after 2 seconds Press SK afterwards to switch to Factory Clone Mode The target radio can be directly turned on to enter the mode The data transferred covers all data in EEPROM other than serial No with flag of manual adjustment switch included 2 Process Process of Wired Clone 1 The LED flashes red once after the source radio enters Wired Clone Mode Hold down PTT to clone data to the target radio HT TC 320 Service Manual 2 During communication LED of the source radio glows red and LED of the target radio glows green When communication finishes LED of the source radio glows green and LED of the target radio goes out indicating that both radios are ready for another cloning operation 3 If any abnormal situation occurs during cloning the source rad
34. 0 Heat sinking device3 5 1 5mm 00 RoHS Pa 450 3001053330000 Chip resistor 33KQ F 1 16W RoHS R125 1451 3210305330000 Multi layer chip inductor 33nH J 200mA 0 580hm RoHS L503 452 3001056820000 Chip resistor 6 8KQ J 1 16W RoHS 1 R208 453 3001056820000 Chip resistor 6 8KO J 1 16W RoHS R524 2H D 454 Chip resistor 6 8KQ J 1 16W RoHS R529 Earpiece jack LGK1503 03xx RoHS a4 3202 Bac cd 456 3399990000080 ZenerDiode6 8V ROHS aji TA 457 8899990000080 Zener Diode 6 8V RoHs 1 D402 BD 458 3399990000080 Zener Diode 6 8V RoHS 1 pas Bac Zener Diode 6 8V ROHS 1 Deo7 Bac 460 3399990000080 ZenerDiode 6 8V RoHS 1 pss BD 461 3399990000080 ZenerDiode6 8V ROHS i D610 a 462 3701327610060 Crystal 32 768KHz 20ppm 12 5pF RoHS 1 x601 t 463 3002991030160 Trimmer resistor 10K 25 0 15W RoHS 1 vrto1 Ban 464 3001058200000 Chip resistor 820 F 1 16W RoHS 1 R526 BBG 465 3001064710000 Chip resistor 4700 J 1 10W RoHs 1 R609 BOA 466 3001064710000 Chip resistor 4700 J 1 10W RoHS 1 R634 BSA 467 3101050390000 Chip capacitor 0 3PF B 50V RoHS 1 cs 4 B3H Chip capacitor 12PF J 50V RoHS C106 474 Chip capacitor 27PF J 50V RoH EN 418 Chip capacitor 47PF J 50V RoHS 4 c418 B3B Chip capacitor 27PF J 50V RoHS la c517 B2H
35. 1020010 Chip capacitor 1000PF K 50V RoHS 1 C425 EB 253 8101051020010 Chip capacitor 1000PF K 50V RoHS 1 c427 s 254 3101051020010 Chip capacitor 1000PF K 50V RoHS iL css gei 255 8101051020010 Chip capacitor 1000PF K 50V RoHS 1 coo B3 256 8101051020010 Chip capacitor 1000PF K 50V RoHS 1 C558 B3H Chip capacitor 1000PF K 50V RoHS 14 c563 pH 258 3101051020010 Chip capacitor 1000PF K 50V RoHS a ceoa Bac 259 8101051020010 Chip capacitor 1000PF K 50V RoHs 1 C605 mE Chip capacitor 1000PF K 50V RoHS 1 ces8 mo 261 3101051020010 Chip capacitor 1000PF K 50V RoHS 1 Ce13 tao 262 3101051020010 Chip capacitor 1000PF K 50v RoHS 1 cete ro 25 HT TC 320 Service Manual No PartNo Description Gty Ref No Print No Remark 263 8101051020010 Chip capacitor 1000PF K 50V RoHS 1 cet7 TD Chip capacitor 1000PF K 50V RoHS 1 ce 9 TH 265 3101051020010 Chip capacitor 1000PF K 50V RoHS 1 C620 rH 266 8101051020010 Chip capacitor 1000PF K 50V RoHs 1 ceao me 267 3101051020010 Chip capacitor 1000PF K 50V RoHs 1 css me 268 3101051020010 Chip capacitor 1000PF K 50V RoHS 1 C651 mc po 269 3101054720000 Chip capacitor 4700PF K 50V RoHS 1 C204 me Chip capacitor 4700PF K 50V RoHS 1 c549 TAK Chip capacitor 4700PF K 50V RoHS
36. 1061050020 Chip capacitor 1UF K 25V RoHS 1 ceoo tso 331 8101061050020 Chip capacitor 1UF K 25v RoHS 1 C t0 TD 1332 3101061050020 Chip capacitor 1UF K 25V RoHS 1 ce15 re 333 3101061050020 Chip capacitor 1UF K 25V RoHS 1 C621 ml 334 3101062250000 Chip capacitor 2 2UF K 10V RoHS 1 Ce18 TD 335 3104071050070 Tantalum capacitor 1UF M 16V RoHS 1 C420 sxc 336 3104074750070 Tantalum capacitor 4 7UF M 10V RoHS 1 c128 B4G 337 8104074750070 Tantalum capacitor 4 7UF M 10V RoHs 1 Ci40 se 338 3104074750070 Tantalum capacitor 4 7UF M 10V RoHS 1 C201 me 339 3104074750070 Tantalum capacitor 4 7UF M 10V RoHS 1 C200 THE 340 3104074750070 Tantalum capacitor 4 7UF M 10V RoHS 1 C305 ra 341 8104074750070 Tantalum capacitor 4 7UF M 10V RoHS 1 caa2 ra 342 3104074750070 Tantalum capacitor 4 7UF M 10V RoHS 1 Ceo2 BB 343 3104074750070 Tantalum capacitor 4 7UF M 10V RoHS 1 Coos te 344 3104074750070 Tantalum capacitor 4 7UF M 10V RoHS 1 ce43 tac 345 3102992000040 Trimmer capacitor 10pF 2 5pF 55V RoHS 1 Tc101 Ba 346 3210305479000 Multi layer chip inductor 4 7nH S 300mA 0 180hm RoHS 1 L513 BIE 347 3210305150010 Multi layer chip inductor 15nH J 300mA 0 32ohm RoHS 1 C515 BIE
37. 121dB m MOD 1KHz DEV 3KHz Filter 0 3 3KHz Communicati on Test Set SSG 120dB m MOD 1KHz DEV 1 5KHz Filter 0 3 3KHz 42 TC 320 Service Manual sample the current value 119dBm or above Antenna Earpiece Socket 117dBm or above HT TC 320 Service Manual Troubleshooting Flow Chart Transmit Circuit ES V v Y Y Lovv TX N sound No LED fails to Replace povver transmission glow flash D602 Normal TX Check the TX ower supply power supply Yes y Check the voice channel Output ports of MIC U501 LED of D602 TX VCO Check the U601 glows red locked TX VCO MOD OUT Yes Replace D602 Y Check the TX channel v v v Check the Check Q401 Check the antenna Q402 Q403 APC circuit and U501 43 HYT Receive Circuit No signal received The RX circuit is No normally supplied The RX LED works Check the RX power supply circuit No normally he RX signaling is se No correctly The speaker works No normally he audio amplifier No Change the RX signaling Replace the speaker works normally he
38. 2 HT TC 320 Service Manual Mol PartNo Descriptinm______________ Qty RefNo PrintNo Remark 131 3001066810010 Chip resistor 6800 J 1 10W RoHS R625 ma Chip resistor 0 390 J 1 4W RoHS 1 R49 Tas 7 133 8099080398000 Chip resistor 0 390 J 1 4W RoHs 1 R420 vas 134 3099080398000 Chip resistor 0 390 J 1 4W RoHs a R421 r 135 3005051020010 Integrated resistor 1K J 1 16W RoHS 1 RN101 ma 136 3101050590010 Chip capacitor 0 5PF B 50V RoHS 1 C109 se 137 3101050590010 Chip capacitor 0 5PF B 50V RoHS 1 C144 ee 138 3101051590000 Chip capacitor 1 5PF B 50V RoHS 1 cast saa 141 3101050200010 Chip capacitor 2PF B 50V RoHS 1 C428 Ba 142 3101050200010 Chip capacitor 2PF B 50V RoHs 1 C433 ss 143 3101050200010 Chip capacitor 2PF B 50V RoHs 1 c449 ee 144 3101050200010 Chip capacitor 2PF B 50v RoHS 1 C502 828 145 146 Chip capacitor 2PF B 50V RoHS 147 149 3101050300000 Chip capacitor 3PF B 50V RoHS 1 C501 s 160 3101051000020 Chip capacitor 10PF J50V RoHS 1 cos Be 161 3101051000020 Chip capacitor 10PF J50V RoHS 1 C104 B4G 162 3101051000020 Chip capacitor 10PF J50V RoHS 1 cto7 Bae 163 3101051000020 Chip capacitor 10PF J 50v RoHS 1 C118 se 164 3101051000020 Chip capacitor 10PF J 50v Rons 1 C151 BOF 165 3101051000020 Chip capacitor 10PF
39. 8V 10mA RoHS 1 D616 os 409 3303060300010 Switching diode GOV 100mA 0 8V 10mA RoHs D617 B26 410 D601 411 3307110100080 LED 15mcd 25mA 2 2v RoHS osos es 412 3307110100060 LED 200med 30mA 1 9V RoHS i ps2 ma 413 3307110100060 LED 200med 30mA RoHS fes ss 414 3309030600000 Zener Diode 6 1v RoHS tt D605 ms 415 3411002000020 NPN transistor 50v 150mA RoHS ajan s 416 3411002000020_ NPN transistor 50v 150mA RoHS 1 Q608 TAD 417 3404002000000 _ NPN transistor 20v 100mA RoHS 1 Q102 ss 418 3403008000010 BRT Vce 50V Vioff 0 5V Vlon 3V 100mA RoHS Lol mae 419 3403008000010 BRT Vce 50V Vioff 0 5V Vlon 3V 100mA RoHS 1 Q405 T23 420 3403008000010 BRT Vce 50V Vioff 0 5V Vlon 3V 100ma RoHS 1 Q501 ze 421 3403008000010 BRT Vce 50V Vioff 0 5V Vlon 3V 100mA RoHS 1 Q604 e 422 3403008000010 BRT Vce 50V Vioff 0 5V Vlon 3V 100mA RoHS 1 Q605 tar 423 3401002000990 NPN transistor10V 30mA RoHS 1 Q104 mel 424 3401002000990 NPN transistor10V 30mA RoHS tt Q105 Bs 425 3401001000490 PNP transistor 50v 150mA RoHS tfazoii m3 426 3401001000490_ PNP transistor 50v 150mA RoHS 1 Qev tse 427 3503020000030 N MOSFET VDS 30V ID 100mA VGS th 3 0V RoHS 1 Q202 r2D 428 3408002000030 NPN transistor 12v 100mA RoHS A Q401 er NPN transistor 12V 100mA RoHS
40. 91 3101052230000 Chip capacitor 0 022UF K 16V RoHS pifcee re 292 3101051040060 Chip capacitor 0 1UF K 16V RoHS aje BSH 293 3101051040060 Chip capacitor 0 1UF K 16V RoHS 1 C134 p 294 3101051040060 Chip capacitor 0 1UF K 16V RoHS 1 C135 sr 295 3101051040060 Chip capacitor 0 1UF K 16V RoHS 1 fou ee 296 3101051040060 Chipcapacitoro tUF K teV RoHS i c2z T2D 297 8101051040060 Chip capacitor 0 1UF K teV RoHS 1 C218 T2D 298 3101051040060 Chip capacitor 0 1UF K 16V RoHS 1 C304 taa 299 3101051040060 Chipcapacitoro tUF K teV RoHS 1 C311 taa 300 3101051040060 Chipcapacitoro tUF K 16V RoHS amp 1 C312 T3A 301 8101051040060 JChip capacitor 0 1UF K 16v RoHS 1 C313 raf 302 304 3101051040060 Chip capacitor 0 1UF K 16V RoHS 1 C422 ts 305 3101051040060 Chip capacitor 0 1UF K 16V RoHS 1 C436 B3B 306 3101051040060 Chip capacitor 0 1UF K 1eV RoHS i cas ra 26 HT TC 320 Service Manual Mol PartNo Descriptin_____________ Qty RefNo PrintNo Remark 807 8101051040060 Chip capacitor 0 1UF K 16V RoHS 1 C441 mas 308 3101051040060 JChip capacitor 0 1UF K 16V RoHS amp 1 C519 T3H 309 3101051040060 JChip capacitor 0 1UF K 16V RoHS
41. After entering U601 the DEMOD signal derived from IF demodulation is converted to digital signal via analog to digital conversion ADC and then is sent to the digital low pass filter The signal is divided into two flows One flow is processed by C TCSS CDCSS decoder the other is processed by high pass filter and then is subject to processing procedures such as de emphasis decryption and signal expansion and finally is output as audio signal after digital to analog conversion 2 4 3 Audio Power Amplifier The audio signal output from U601 is amplified by the audio power amplifier U301 to drive the speaker directly 2 5 Power Supply Processing The block diagram of the power supply circuit is shown as below 14 HT TC 320 Service Manual TX_CTL POWER o Q604 B U602 VDD a DC DC VCC SW VT G602 T BATTERY VR V_SAVE Figure 6 Power Supply Section The 3 8V battery voltage is converted to two flows of 3 0V DC voltage by the LDO module U602 that is VCC and V SAVE VCC powers CPU while V SAVE controls VT and VR VT goes through Q604 and Q601 and outputs 3V voltage for TX circuit under the control of TX C TRL VR supplies 3V voltage for RX circuit under the control of Q604 and Q602 VDD 3V supplies the PLL U101 and XT101 15 4 y CPU Pins Pin No Port Name PinName T e OJ e n lt e Da o P61 SAVE_CTL O P50 INTO P53 INT3 IPOWER SWI
42. Chip capacitor 22PF J 50V RoHS 478 Multi layer chip inductor 10nH J 300mA 0 26ohm RoHS U1 482 3418001000010 NPN transistor10V 50mA 150 RoHS 1 asos 82H 30 O O QO U2 U1 U2 U1 U2 HT TC 320 Service Manual Mol PartNo ____ Descriptin_____________ k Oty RefNo PrintNo Remark 483 a1003203000H0 PCB board 4L 4P H RoHS Pa PB 484 3101051810010 Chip capacitor 180p J 50v RoHs 1 cso7 sas 1487 8101050100030 Chip capacitor 1PF B 50v RoHS 1 C527 tH 489 1616100001420 Built in software for HYT conventioani portable radio RoHs 1 c545 U2 490 3001051820000 Chip resistor 1 8KQ J 1 16W RoHS 1 Rara s 493 Chip resistor 27KO D 1 10W RoHS U Chip resistor 18KQ D 1 10W RoHS 4 R412 B2D 496 Chip resistor 68KO J 1 10W RoHS 1 R417 497 Chip resistor 47 KO J 1 10W RoHS ER R417 498 Chip capacitor 82PF J 50V RoHS C538 Chip capacitor 24PF J 50V RoHS 4 cs41 pH 7 Tantalum capacitor 10UF M 6 3V RoHS 1 10132 me 7 Switching diode 75V 200mA 1 25V 6ns RoHS 1 D104 Be 7 502 3504990000040 Power amplifier MOSFET 10uA 25V 10uA 72V 7W RoHs 1 Q403 Bac 505 3101050500010 Chip capacitor 5PF B 50V RoHS a cash BAG 506 3104081550030 JTantalum capacitor 1 5UF M16V RoHS 1 C115 ee 509 3101061040020 Chip capacitor 0 1UF z 25v RoHs i C114 se 510 3101061040020 Chip capacitor 0 1UF z 25v Ro
43. HS i C116 se 511 8101064710000 Chip capacitor 470PF K 50v RoHS 1 css T4F 512 3001052200000 Chip resistor 220 J 1 16W RoHS R639 TD 1513 3303030300000 Schottky barrier diode 40V 30mA 0 26V 1mA RoHS 1 D612 tse 514 3303030300000 Schottky barrier diode 40V 30mA 0 26V 1mA RoHS 1 eto T3H 516 Chip capacitor 0 47UF Z 6 3V YSV RoHS Power management IC 4 2V 1 2A RoHS Rectifier Diode 10V 15mA 380mV 1mA RoHS 4 D508 B1B Chip resistor 8 2KQ J 1 16W RoHS 1 R407 128 Chip resistor 8 2KQ J 1 16W RoHS R430 522 Chip resistor 5600 J 1 16W RoHS a R126 ee cd 523 8210305180000 Multi layer chip inductor 18nH J 300mA 0 360hm RoHS 1 L112 se 524 3001051220000 Chip resistor 1 2KO J 1 16W RoHs Lili B3H 525 3001051220000 Chip resistor 1 2KO J 1 18W RoHS 1 R636 re 526 3603042004860 IF processor IC 10 245MHz RoHS 1 U608 BAH 31 j wech 2 U1 U2 Z U HT TC 320 Service Manual Mol PartNo Description Qty Ref No Print Nol Remark 527 3001056810000 Chip resistor 6800 J 1 16W RoHS tt R515 Ba 528 8404001000040 NPN transistor45V 100mA RoHS fa Q611 T3H 1529 8604007000000 PLL IC 1 2GHZ RoHS tt U101 BAG 534 8305180300000 Diode 100mA max 10 RoHS tt D401 BB 535 6205005000100 USB connector 5Pin 0 5mm 9 9 9 2 4 0mm RoHs 1 J201 B4D 542 8920450300000 Freque
44. Hytera HYT is the trademark of Hytera Communications Corp Ltd 2010 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 cn 8130032000010 SERVICE MANUAL TWO WAY RADIO C 320 Contents Revision History 1 Copyright Information 1 Disclaimer 1 Introduction 2 Radio Dre Ie aa 3 Software SpecificationS 4 Circuit Description ere ree 9 CPU Pins SS SS SS SS SS eene eee 16 WICH 20 Adjustment Description 33 Troubleshooting Flow Chart 43 Disassembly and Assembly
45. LK po f m gt viva yO al INO DIN dV 3AVSA Gow 10 aon lt ngc 0 8029 ON Loza npo ZZO ON ON 909q 609a HNL Loz1 oza O DIIN O Ld 202d ge ozaa 809d dooor AOLINL 7 X 1999 9099 9988091 1dA NI1Y49 NOLMZ y 9079 as 9zai 209a ce8sLyse doooL 9Lzo 001 g0ey ge ozaa Loea O zas cocdl Ivg a no 0L U L LLEY 3 SE LES 909H R l LY Q 0L M a Nd m N O Niog kos 4000k AOL nZ v X NIA 1va mm iva A VIZEOZILEN soon 00k c9H no Z020 JIN SLO9 5091 AL nz nj AOLINZ Y nYo 0 2 neu GOED Froe QNO ddA SSvdA8 NMOGLNHS CON NI NI LOA 89 cOeY JANS809L LaX AaJA z09a 4 089 GCHd iva Y yo No dozr e299 ALp 9194 IDA 1090 9988091 1dA N33Y9 E091 HK EE9H ON 0999 Jr E 2 doz dozy 1 dozy 1 dozr Je LO9YA ECHO ZJO s9790 9299 L1 1 KE SEY _ j Kk T Ps D ALVY 0193 ozori o jeuueys MS 909MS i MOU L NOTZ d0001 E094 0 5099 N0ZZ Z09H iva A 001 7094 nzz0 0 ZY9O Xt 90Z3 det daj 6690 MBILZE 8699 LO9X dVO Tld LIVIX 01V LX Iva lt asna OLZELUS AL ZOZA Loon T Odv 2494 2 lt BS ent Fatoss s 929A p h dozr doy 2889 T Non 09MSQ O e690 SOOM ng 0690 dozy LL9O SL09 h d dozr dozy 99A KE siga w99 7 NMO woo T d LO9MS 09 MS 709 MS O O ne 0 0 ED 49MOd8NOW Werberg o
46. Reserved 17 HYT P44 5EG28 DATA O UO Oli O O O O oj ol OJ O L Ou Oil O Oli O TC 320 Service Manual Reserved Reserved Reserved To detect input from the encoder switch ML w m ke E LEE be E X Loos n Ecco i AAA A kai Doro Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Power control pin Reserved EEPROM CLOCK connected with a pull up resistor EEPROM DATA connected with a pull up resistor To detect PLL circuit unlock H lock L unlock connected with a pull up resistor PLL DATA PLL CLOCK 18 HYT 89 S Ground power supply for digital circuit 90 S Power supply for digital circuit O O PLL ENABLE i E Q2 N e J D lt O O D C D 91 SW PO To control RX TX H RX L TX switch to VCO 92 SW_P1 TX_CTRL To control power supply for TX transmit at high level 93 RESET RESET Reset input 94 Ground power supply for analog circuit 96 BG REF Power supply for analog circuit Reference voltage output pin Ol QI O 100 NC 97 MIC IN MIC IN Microphone input pin 98 DEMODE DEMODE Baseband signal audio and CTCSS CDCSS input pin 99 MODOUT MODOUT O Baseband signal audio and CTCSS CDCSS output pin Nd n Requirement As the port of Reserved is set to O its configuration should be Output and Open 19 HT TC 320 Service Manual Parts List 1
47. TCH O O O TC 320 Service Manual UO UART TXD UART RXD To control the speaker H unmute L mute To control Power Save it is at high level in non Power Save status To check MIC connection valid at high level PTT key on the earpiece valid at high level Red LED Green LED Reserved Reserved Ground power supply for digital circuit Power supply for digital circuit Volume Adjust Key Volume Adjust Key Reserved Power Switch Programmable function key side key valid at low level connected with a pull up resistor PTT key valid at low level connected with a pull up resistor Reserved Reserved Power supply for digital PA Audio output 16 HT TC 320 Service Manual Vdd CLD VCC 3 0V P77 RF_CTRL low freguency band DA To control TX power Input pin of reference voltage of ADC and DAC DA CTCSS CDCSS output AD VOX energy detection pin S Ground power supply for analog circuit S Power supply for analog circuit AD To detect noise AD To detect battery strength i To connect 32 67 8KHZz main crystal oscillator To connect the external capacitor 10nF of PLL Ground power supply for digital PA Reserved Power supply for digital PA Ol PI CI O To control RX frequency band valid at high level high frequency band valid at low level Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved O 9 OJ O OF OI O O O
48. U101 U608 VCO_IN MB15F03SL Q102 D103 D101 D102 G601 BATTERY RIPPLE FILTER LOOP FILTER m 1 Figure 1 TX Section The audio signal from MIC is sent to the MCU chip U601 directly The baseband signal processing circuit in U601 converts the amplified audio signal to digital signal via A D conversion and then converts the digital signal to modulation signal via D A conversion after all processing procedures such as filtering signal compression encryption pre emphasis TX gain control and amplitude limiting are completed Then the modulation signal from MCU passes through the low pass filter circuit and goes to VCO for direct freguency modulation The modulated HF carrier signal passes through the buffer amplifiers 2104 and Q406 and goes to the amplifier 6401 through the RF switching diode D616 Then the amplified RF signal enters the low pass filter circuit through the switching diode D401 after it is further amplified by the driver 0402 and final stage power amplifier Q403 and then it will be finally transmitted via antenna after high order harmonics are removed The RX TX switch circuit is composed of D401 and D501 9 HT TC 320 Service Manual RX Section RF signal received via the antenna is fed to the bandpass filter composed of SAWF501 and SAWF502 to filter out unwanted out of ba
49. Volume Control kno works normally P98 and P27 of MCU U60 output signals normally he modulation parts No Check the audio amplifier circuit No No v Replace the Volume Control knob Check and replace MCU work normally mixer circuit work No v Check and replace CD501 and CF501 normally RF mixer circuit work No v Check U501 Q504 and Q505 normally Yes Check U501 its input output Check the output status of the local oscillator VCO Q505 U501P38 circuit and Q506 Check the antenna The RX frequency is set correctly he RX SOL level is set correctly Replace the RX LED D601 Completed 44 Change the RX freguency Change the RX SOL level TC 320 Service Manual HYT MCU Start p No The speaker NG Replace the orks normally speaker No gt Check U602 Yes Yes Clock crystal No X601 of MCU works pi Replace X601 normally2 Yes Check battery No detect pin 40 Other pins contro EEPROM detect normally Yes v MCU works normally pin 83 84 and the reset IC pin 93 45 TC 320 Service Manual HT TC 320 Service Manual
50. ad 600 100MHz 25 3000mA RoHS 4 L607 Tac Bead 2200 100MHz 25 2000mA RoHS L407 390 3231301250000 Air core inductor E2 0 30 1 2 5TL RoHS 1 L406 BID 393 3210209102010 Wire wound chip inductor uH M 445mA 0 5ohm RoHS 1 L415 B2A 394 3231351640000 Air core inductor E2 0 35 1 6 4TL ROHS 1 1412 ssa 28 AN Noun EN JAN PAN PAN JAN jan Ss Fu HT TC 320 Service Manual Mol PatNo Descriptin____________ Qty RefNo PrintNo Remark 395 3231351640000 JAir core inductor E2 0 35 1 6 4TL ROHS o 4 L413 B3A Air core inductor E2 0 35 1 6 4TL RoHS afma Beal cd 397 3231351640000 Air core inductor E2 0 35 1 6 4TL RoHS 1 L501 B28 1898 3231351650000_ Air core inductor E2 0 35 1 6 5TL ROHS 1 L409 B3B 399 3304060300050 Varactor HVC350BTRF E RoHS 1 D101 BE 400 3304060300050 Varactor VR 15V 16 4pF 1VR 5 5pF AVR ROHS 1 D102 Bae 401 3304040200000 Varactor VR 30V 19 7pF 1VR 2 1pF 28VR RoHs 1 D103 B3E 402 3303030800040 Switching diode 35V 100mA 0 8V 10mA RoHS 1 D501 Bas 403 3303060300010 Switching diode 60V 100mA 0 8V 10mA RoHS 1 D105 B3E 404 3303060300010 Switching diode 60V 100mA 0 8V 10mA RoHS 1 D502 BIF 405 3303060300010 Switching diode 60v 100mA 0 8V 10mA RoHS 1 D503 me 408 3303060300010 Switching diode GOV 100mA 0
51. ave the 2 3KHZ value after wide and narrow bandwidth adjustment 3 0KHz HYT TX Low Voltage Threshold RX Circuit Adjustment Es Squelch On Narrow Bandvvidt to switch between wide and bandwidth Rotate the Channel Selector knob to CH8 Wide Bandwidth Rotate the Channel Selector knob to CH10 and SQL level 5 ON Is set Press or key to sample current value At this time wide bandwidth and low frequency are selected Short press PTT key to switch the frequency low medium and high narrow lt 20Hz 15k Hz AF 1kHz 13x3mV Digital voltmeter Test Instrument Communicati on Test Set SSG 119dB m MOD 1KHz DEV 3KHz Filter 0 3 3KHz TC 320 Service Manual Adjust output voltage of the power supply to 3 42V and press or key to sample the current value Antenna Earpiece Socket Adjust the output signals of SSG to the squelch level Rotate the Channel Selector knob to save the value after three point adjustment lt 3 40V the continuous alert tone will sound to indicate transmissio n inhibition Specificati on Remarks Squelch level Level 5 121 1dB m 4 HYT RX Low Voltage Threshold Narrow Bandwidth Wide Bandwidth Narrow Bandwidth Short press SK to enter narrow band Press or key to adjust squelch level Short press PTT key to swi
52. equency Synthesizer The PLL circuit mainly provides the local oscillator signal for RX and RF carrier signal for TX It is composed of VCO and PLL processor allowing frequency tracking and channel switching under the control of MCU signals 1 PLL 10 HT TC 320 Service Manual Dele Tx OUT WED 0104 0406 102 DIO3 Del L E101 Dol E15E035L Dl The PLL circuit generates RF carrier signal for TX and the first local oscillator signal for RX LOOP FILTER Figure 2 PLL Step frequency of the PLL circuit is 6 25 KHz 10 0 KHz or 12 5 KHz In U101 the 21 25MHz reference oscillator signal is divided into 6 25 KHz 10 0 KHz or 12 5 KHz reference frequencies via a fixed counter in PLL Processed by the buffer amplifier the signal output from the VCO TX RX VCO enters PLL The amplified signal is further processed in PLL by the variable frequency divider Then the signal is compared with the reference frequency in the phase detector PD of PLL The signal from the PD passes through a low pass filter and then is sent to the varactors D101 and D102 of VCO so as to control output frequency Then the RF signal is processed by the buffer amplifiers Q104 and Q406 and controlled by D616 and D617 to only serve as RF signal or RX first local oscillator signal 2 VCO VCO section is realized by the oscillator circuit of three point capacitance TX VCO and RX VCO share the same oscillator circuit In TX mode Q103 is cut off and
53. escribed in this manual may include Hytera computer programs stored in memory or other media Laws in PRC and or other countries or areas protect the exclusive rights of Hytera 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 Hytera computer programs Any Hytera computer programs may not be copied modified distributed decompiled or reverse engineered in any manner without the prior written consent of Hytera Hytera 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 Hytera If you have any suggestions or would like to learn more details please visit our website at htto www hytera cn HT TC 320 Service Manual Introduction Manual Scope This manual is intended for use by qualified technicians only HT TC 320 Service Manual R J ae Oy
54. eys are released the radio will enter the adjustment item in this mode the item entered depends on the position where the Channel Selector knob locates And the LED will glow red green for adjustment items in TX RX groups respectively 2 Or connect the programming cable to the radio for real time adjustment in PC mode 2 Description of Adjustment Items 1 Switch of Wide Narrow Bandwidth and Frequency in an Adjustment ltem In an adjustment item short press SK to switch between wide and narrow bandwidth The default adjustment point is the first frequency low frequency of current bandwidth Short press PTT to switch among different frequencies after selecting a bandwidth 2 Adjustment Items Include TX Items TX Frequency Tolerance and VCO Lock Voltage Note These items are adjusted outside the adjustment mode via hardware TX Low Power TX High Power CDCSS Waveform CDCSS Deviation CTCSS Deviation low CTCSS Deviation medium CTCSS Deviation high TX Low Voltage Threshold and Max Deviation Note These items are adjusted inside the adjustment mode 34 HT TC 320 Service Manual RX Items VCO Lock Voltage outside the mode Squelch and RX Low Voltage Threshold 3 Specific Operations and Reguirements 1 Conventional Adjustment Items outside the adjustment mode TX Freguency Tolerance VCO Lock Voltage Note The configuration file nas preset CH1 CH2 and CH3 as wide bandwidth with low medium and high freque
55. he Channel Selector knob to CH5 CH6 and CH7 with CTCSS respectively corresponding to low medium and high freguencies Short press PTT key to switch among different CTCSS freguencies on each channel Communica tion Test Set lt 20Hz 300 Hz 38 Antenna TC 320 Service Manual Press or key to make adjustments until the 350 550Hz CDCSS deviation meets the requirements Use or key to make slight adjustment until the 600 900Hz CTCSS deviation meets the requirements HYT Narrow Bandvvidt VVide Bandvvidt Maximum Frequency Narrow Deviation Bandwidt Wide Modulation Bandwidt Sensitivity On CH5 CH6 and CH7 short press SK key to enter narrow bandwidth and short press PTT key to switch among different frequencies Rotate the Channel Selector knob to CH9 Short press SK key to switch between wide and narrow bandwidth Communica tion Test Set Antenna BPF Earpiec lt 20Hz 15k e Hz Socket AF 1kHz 120mV Rotate the Channel Selector knob to CH9 tion Test Set Communica Short press SK key BPF 39 MAMA T C 320 Service Manual 320 Service Manual Use or key to make slight adjustment until the 350 550Hz CDCSS deviation meets the requirements Use or key to ensure 3 4 3KHz that the specifications meet the requirements Rotate the Channel Selector knob TI to s
56. he speaker cable and the charging piece at the bottom Charging piece Assembly 1 Install the main PCB a Make sure that the speaker is well connected and the charging piece on the bottom is correctly installed b Install the supporting ring of the Channel Selector knob c Attach the main PCB d Attach and secure two screws Note Control the torsion force within 0 8 1 2kgf e Dontdamage the speaker cable during installation 48 HT TC 320 Service Manual 2 Assemble the chassis a Attach the cover of PTT key b Attach the chassis of radio c Attach and secure the four fixing screws Note Control torsion force within 1 2 1 5kgf 3 Assemble the nuts and Channel Selector knob on the top a Attach and secure the nuts on the top of the radio with a waterproof ring b Attach the Channel Selector knob c Attach and secure the fixing screw d Attach and secure the Channel Selector knob cover 49 HT TC 320 Service Manual 4 Assemble the antenna
57. io will stop cloning and its LED will flash orange indicating both radios are ready for another cloning operation 4 When the communication ends the source radio goes back to standby status Hold down PTT again to begin another cloning Manual Adjust Mode Hold down PTT and SK on the radio while powering it on and the radio enters Manual Adjust Mode Note This operation is subject to the option Panel Test Mode in the programming software When this option is unchecked the radio will be unable to enter the adjustment mode It 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 The adjustment values can be reset and changed in Factory Mode only Description of adjustment 1 To enter Manual Adjust Mode Hold down PTT and SK for 2 seconds while powering on the radio The LED will glow orange when the radio is in Adjust 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 2 To switch between TX group and RX group This operation is done through the Channel Selector knob The LED glows red when adjusting items in TX group The LED glows green when adjusting items in RX group 3 To switch between items of TX group RX group This operation is done through the Channel Selector knob TX group
58. ncy detector 100mvi40mv 450KHz 4kHz t CD501 TAH 543 s801045030390 Ceramic filter 450KHz 16 0KHz t crso1 B 1544 8802021750090 Crystal filter UM 6 21 7MHz 6KHZ for B3 32 HT TC 320 Service Manual Adjustment Description 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 Preparations Place the board to be tested on the test fixture please ensure good connection between each test point and the fixture and connect the board to a power supply with DC voltage of 3 8V Wired Clone 1 Operations 1 Connect two radios using a clone cable Power on the source radio while holding down SK and it will enter Wired Clone Mode after 2 seconds The target radio can be directly turned on to enter user mode 2 In Wired Clone mode press SK of the source radio to switch between User Clone Mode and Factory Clone Mode check the Factory Clone Mode option when programming or you will fail to switch 3 Hold down PTT key of the source radio to clone data to the target radio You can clone the data to multiple target radios in the same way 2 LED Indications Status of the source radio During the cloning process the LED solidly glows red Once it finishes the LED will solidly glow green Clone errors 1 User clone Once clone begins frequency band and radio ID Model ID will be checked The LED glows
59. ncy respectively and CH4 CH5 and CH6 as narrow bandwidth with low medium and high frequency respectively Make sure the antenna or load is connected before adjustment ee mmm Specification Condition Test Test point Remarks Instrument Adjust VR101 Rotate the with ceramic TX Channel Communication tuning tool to Freguency Selector knob to Antenna VR101 test set control the center Tolerance CH1 and press freguency within PTT to transmit the error range Rotate the Channel Digital Selector knob to voltmeter CV Check 2 2V 2 6V CH3 and press TX VCO PTT to transmit Lock TC101 Rotate the Voltage Channel Selector knob to Check CH1 and press PTT to transmit 35 HYT RX VCO Lock Voltage 2 Adjustment in the Adjustment Mode Note Make sure the antenna or load is connected before Rotate the Channel Selector knob to CH3 Rotate the Channel Selector knob to CH1 TC 320 Service Manual Adjust TC101 with ceramic tuning tool until 2 2V 2 6V the lock voltage meets the requirements adjustment rotate the Channel Selector knob to save the adjusted values automatically KES High Power Rotate the Channel Selector knob to CH2 and select low freguency Short press PTT key to switch among different freguencies low medium and high Rotate the Channel Selector knob to CH1 and select low Power freguency en Test point Test Instrumen
60. nd interference signal and then amplified by LNA Q503 The amplified signal is then fed to the bandpass filter SAWF503 to further filter out unwanted out of band interference signal The desired RF signal is mixed with the first local oscillator signal output from VCO by Q505 The newly generated signal is processed by the crystal filter XF501 to get the first IF signal 21 7MHz After amplified by Q506 this IF signal enters U608 to be further mixed with the second LO local oscillator signal and to generate the second IF signal 450 KHz This second IF signal is demodulated by U608 to output audio signal which is sent to MCU for A D conversion and filtering Afterwards the audio signal is divided into two flows One flow is processed by CTCSS CDCSS decoder the other is restored to audio signal through filtering de emphasis decoding signal expansion and D A conversion Then the restored audio signal is amplified by the audio power amplifier U301 to drive the speaker directly Power Supply Section The 3 8V battery voltage is converted to two flows of 3 0V DC voltage by the LDO module U602 that is VCC and V_SAVE VCC powers CPU while V_SAVE controls VT and VR VT goes through Q604 and Q601 and outputs 3V voltage for TX circuit under the control of TX CTRL VR supplies 3V voltage for RX circuit under the control of Q604 and Q602 VDD 3V supplies the PLL U101 and XT101 2 Realization Methods of Basic Functional Modules 2 1 PLL Fr
61. newaouyos z n OZE OL Z pe eee b gt gt dd FE ds do GYO dz cSvoO 440 ON GESH do02t do02t 1999 rSSO 4 NI 02A AVE 7 dozy Huzz do nro x9 G 496 0610 vI 1449 9EGY PECH dont dooL 00L 00L 6119 EZIS GELO PELO _ AL LOLNY KAY a1 089 E prp aaa iya SLGH y EA AA A YO nro uy O i d d e HIS LESI UIJX Ur v BM dozy 18 9 R Er e99 vien 99A doo dA ELO dooot 1NO0SO NI9SO lt 3AVSA SLZO ngyn v A LO X ISC03SLAW AL OLY O N votu 07490298 ZZSO 9001 lt INO 10 6190 OLY XS ANESMOL NO 9 40SFNA4TY OL coly ZELO MOLY OS4O 80LH doool _ _ 9Z19 S O9 cor ON O ON HWZ IZ zeso ON Les LOSJX coca _ 9eZHISZ T 042 dozr 9050 Y ee nyo 90683 Z960 0969 9299 d8L9 oN _ _ _ 9989 8091 F d000L pay aadA 8159 KO ng 85 1780 SL09 VA OL SOSH a ON _ YA 0 Giel E 7 81994 a 9 9 HUZL SN 8091 YO 0001 SL 179M ON 8990 ezcu o 18 9 Huge 1999 di y Hug den d 6234 GEN 9ZZvOSZ 15O LIGJ _ so _ _ S0SO LLGLY 1V 0SO 30ZF lt NI 3Y 1198 dzc ON ON dl 1199 nL0 0 2091 Z161 d000L 075 nez 6 99 6097 d HUZL 0 HUOOL GG vlc 309v 40H 01681 1181 OSIMVS HUGE 9 61 dost OL 1089 91994 nvo ue Z8 96590 959 9zcu a w q 0 HA SL11 419714 WeJBe g 2neuieu s Z N OZE OL HT TC 320 Service Manual General Specifications Frequency Range U1 400 420MHz U2 450 470MHz O Channel
62. of SAWF501 and SAWF502 to filter out undesired out of band interference signal Then the desired RF signal is amplified by LNA Q503 and goes through the bandpass filter to filter out undesired out of band interference signal The desired RF signal is mixed with the first local oscillator signal output from VCO by Q505 The newly generated signal is processed by the crystal filter XF501 to get the first IF signal 21 7MHZ After amplified by Q506 this IF signal enters U608 to be further mixed with the second LO local oscillator signal and to generate the second IF signal 450 KHz Then the second IF signal is demodulated by U608 to output audio signal which is sent to MCU for A D conversion and filtering Afterwards the audio signal is divided into two flows One flow is processed by CTCSS CDCSS decoder the other is restored to audio signal through filtering de emphasis decoding signal expansion and D A conversion Then the restored audio signal is amplified by the audio power amplifier U301 to drive the speaker directly 2 4 MCU Control Signal Processing and Audio Power Amplification The block diagram of this section is shown as below SW606 ECO EC1 EC2 EC3 R_LED D601 1 mi l NN ON OFF DOW UP MON ot AMP LED SW PTT AF OUT 9 m SP APC OT OUT HE U601 U301 RFC 0201 Ee U N TXD RXD J201 OWER J lt A e In o U603 EEPROM o VDD VCC SW G601 BATTERY O VR V_SAVE 7 Si
63. orange for 2 seconds and then goes out to indicate a failed check If the check is successfully carried out but error occurs during data cloning the LED will flash orange In this situation press any key other than the Power Switch to turn it off 2 Factory Clone If error occurs during data cloning the LED will flash orange In this situation press any key other than the Power Switch to turn it off Hold down PTT to initiate a new clone process Status of the target radio 33 HT TC 320 Service Manual The LED solidly glows green during the cloning process and goes out once it finishes 3 Differences between Factory Clone Mode and User Clone Mode 1 User Clone Mode Only clone the data of user mode Test parameters like adjustment frequencies adjustment items and baseband parameters will not be cloned 2 Factory Clone Mode Clone all the data excluding serial No 4 Instructions 1 Error will occur when data is cloned without cable connection Please refer to 2 2 2 Error may occur during test data clone in Factory Clone Mode if you wrongly press the side key and switch into User Clone mode LED flashes red once 3 If battery of the source radio runs low in clone mode red LED will flash and low battery alert will be given as well Adjustment 1 Description of Adjustment Procedures 1 Power on the radio while holding down PTT and SK for more than 2s to enter adjustment mode the LED flashes orange After the k
64. t Communica Antenna tion Test Set Connect I Ammeter or 36 oni Press or key to adjust the output povver and rotate the Channel Selector knob to save it Press or key to adjust the output I lt 0 8A power and Specificati Remarks 0 5W 0 2W HYT CDCSS Waveform CDCSS Deviation Wide Bandwidt Short press PTT key to switch among different frequencies low medium and high Rotate the Channel Communica Selector knob to tion test set CH3 and wide BPF bandwidth and low lt 20Hz 300 frequency are Hz selected Short press PTT to switch among frequencies and long press PTT to switch between wide and narrow band Rotate the Channel Selector knob to CH4 and wide bandwidth and low frequency are selected Short press PTT key to switch among different frequencies low medium and high 37 MAMA T C 320 Service Manual 320 Service Manual rotate the Channel Selector knob to save it Adjust the waveform to make it similar to sguare waveform Press or key to make adjustment until the 600 900Hz CDCSS deviation meets the requirements HYT CTCSS Deviation Narrow Bandvvidt VVide Bandvvidt Short press SK key to enter the narrow bandwidth and select low freguency Short press PTT key to switch among different freguencies low medium and high Rotate t
65. tch the freguency low medium and high Rotate the Channel Selector knob to CH11 and SQL level 5 ON is set Press Or key to sample current value At this time wide bandwidth and low frequency are selected Short press PTT to switch the freguency Short press SK to enter narrow band Press Or key to sample the current value Short press PTT keyto switch the freguency Rotate the Channel Selector knob to CH12 Communicati on Test Set SSG 118dB m MOD 1KHz DEV 1 5KHz Filter 0 3 3KHz Communicati on Test Set SSG 121dB m MOD 1KHz DEV 3KHz Filter 0 3 3KHz Communicati on Test Set SSG 120dB m MOD 1KHz DEV 1 5KHz Filter 0 3 3KHz Digital voltmeter Antenna Earpiece Socket TC 320 Service Manual Same as Adjust the output signals of SSG to the squelch level Rotate the Channel Selector knob to save the value after three point adjustment Same as above Adjust output voltage of the power supply to 3 52V and press or key to Squelch level Level 5 120 1dB m Squelch level Level 5 122 1dB m Squelch level Level 5 121 1dB m Alert tone will not be given without red LED flashing when RX voltage is Wide Bandwidth Sensitivity Narrow Bandwidth High medium lpw frequency out of the mode High medium low frequency out of the mode Communicati on Test Set SSG
66. ustment value will decrease in steps of 1 hold down and the adjustment value will keep decreasing in steps of 1 The adjustment value will remain unchanged once it reaches the allowed minimum value 7 Operations on special items TX group CH8 is the TX Low Voltage Threshold This adjustment item is related to AD sampling Press or after entering the above item to activate AD sampling including calculation once Rotate the Channel Selector knob to save the current AD sampling value RX group CH10 to CH12 stand for SQL On 5 SQL Off 5 and RX Low Voltage Threshold respectively These adjustment items are related to AD sampling Press or after entering the above items to activate AD sampling including calculation once Rotate the Channel Selector knob to save the current AD sampling value 8 Description of key press Short press key press no longer than 1 second Long press key press time longer than 1 second HT TC 320 Service Manual Circuit Description 1 General Diagram The general circuit is composed of TX section RX section power supply circuit control circuit and etc The block diagram is shown in the figure below CHARG 2 1 VCC CHARG SW 606 ECO ECI 1 QT OUT MOD PRE AMP RF AMP RF AMP LPF NY w401 ANTENNA TX OUT D401 UE A D501 MOD_OUT AF DEMOD DATA STB CK LD SIG OUT

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