TKR-750_serv_revised_2004.pdf

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1、 2004-11 ? ! B51-8567-10 (N) 596 VHF FM REPEATER / VHF ? ! TKR-750 SERVICE MANUAL / ? ! VHF FM REPEATER TKR-750 Front panel (A62-0934-03) Knob (DC source) (K29-9106-04) Key top (K29-5460-02) Knob (Volume) (K29-5389-03) Modular jack (E08-0877-05) Antenna cable (N) (E30-3419-05) Antenna cable (BNC) (E

2、30-3418-05) TEST/SPKR connector assy (E37-0913-05) D-sub cable assy (E37-0904-05) DC backup terminal (E70-0402-05) DC cord (Ext DC in) (E30-3414-05) Fuse (Blade, 15A/32V) (F05-1537-05) x 2 GENERAL . 2 SYSTEM SET-UP. 3 OPERATING FEATURES. 4 REALIGNMENT . 5 INSTALLATION . 8 MODIFICATION . 13 DISASSEMB

3、LY FOR REPAIR. 15 CIRCUIT DESCRIPTION . 16 SEMICONDUCTOR DATA . 26 COMPONENTS DESCRIPTION. 31 PARTS LIST . 34 EXPLODED VIEW . 46 PACKING. 48 ADJUSTMENT. 49 CONTENTS TERMINAL FUNCTION . 67 BLOCK DIAGRAM . 75 INTERCONNECTION DIAGRAM . 78 PC BOARD FINAL UNIT (X45-373X-XX) . 80 DISPLAY UNIT (X54-3330-21

4、) . 84 TX-RX UNIT (X57-695X-XX) (A/2) . 88 TX-RX UNIT (X57-695X-XX) (B/2) . 92 RX VCO UNIT (X58-4780-10). 96 TX VCO UNIT (X58-4790-10). 97 SCHEMATIC DIAGRAM . 98 KES-5 (EXTERNAL SPEAKER) . 111 SPECIFICATIONS . 112 REVISED / ? This service manual applies to products with 60800001 or subsequent serial

5、 numbers. In terms of the products with the serial numbers earlier than 60800001, refer to the TKR-750 service manual as per part No. B51-8567-00. ? !#$%SMUMMMMN? !#$% Wide, XF1; Nar- row) to further remove spurious signals. 2-3. IF Amplifier The first IF signal is amplified by Q2 and Q3, and then e

6、n- ters IC9 (FM system IC). The signal is heterodyned again with a second local oscillator signal (44.395MHz) with in IC9 to become a 455kHz second IF signal. The second IF signal is fed through a 455kHz ceramic filter, CF1 (Wide), CF2 (Nar- row) to further eliminate unwanted signal, and the quadrat

7、ure detection circuit FM-detects the signal to produce a base- band signal and output it from pin 11. 2-4. Audio Amplifier The audio amplifier circuit is located in control section of TX-RX unit (X57-695 B/2). The recovered audio signal ob- tained from IC9 is amplified by IC608, input to the AINR te

8、r- minal of CODEC IC (IC614), and audio processed by DSP (IC618). The processed audio signal from AOUTR terminal of IC614 is amplified by IC619 (B/2) to a sufficient level, anti- aliasing filtered by IC619 (A/2). The audio signal goes to an electronic volume (IC615) V3/V4, to the input of multiplexe

9、r IC (IC622), and is amplified to drive a loudspeaker by an audio power amplifier (IC629). The 4W audio output can be pro- vided to external 4 ohms speaker through the 15-pin test con- nector “SPO, SPG” on the rear panel. 2-5. Squelch Circuit The output signal from IC9 enters FM IC again, then passe

10、d through a band-pass filter. The noise component output from IC9 is amplified by Q7 and rectified by D5 to produce a DC Voltage corresponding to the noise level. The DC voltage is sent to the analog port of the CPU (IC604). IC9 outputs a DC voltage (RSSI) corresponding to the in- put of the IF ampl

11、ifier. 3. Transmitter Circuit The transmitter circuit consists of the following circuits : 3- 1 microphone circuit, 3-2 modulation level adjustment circuit, 3-3 driver and final power amplifier circuit, 3-4 automatic power control circuit, 3-5 RF power down detect, and 3-6 fan action control circuit

12、. 3-1. Microphone Circuit The signal from the microphone is passed through AGC circuit located in display unit (X54-333), so that it does not saturate. This circuit consists of IC501, D501, D502, Q501, and Q502. The AGC is operated by controlling the + and side levels of amplitude using the current

13、obtained by posi- tive and negative detection of the amplified audio signal. The audio signal goes to control section of TX-RX unit (X57-695 B/ 2) from display unit (X54-333). OJOK=? ! ? _mc? !#$% 1A maximum 2SBOPower supply output after power switch; 1A maximum 3NCNo connection 4GNDGround 5GNDGroun

14、d 6SPGSpeaker ground 7RDORX data output (Equal to D-sub connector terminal No. 10.) 8RSSIORSSI output (Analog signal output) 9SPIIInternal speaker input 10AO1OAuxiliary output 1 Open collector. Low : 150mA max. 11AO2OAuxiliary output 2 Open collector. Low : 150mA max. 12SPOOExternal speaker output 1

15、3AO3OAuxiliary output 3 14AO4OAuxiliary output 4 15AO5OAuxiliary output 5 13 12 11 10 987654321 2019 18 17 1625 24 23 22 2115 14 1310741 14 11852 1512963 TERMINAL FUNCTION / ? ! ? ? ? L? ? ? ? ? NPpmj? ? !#$%& ?i? !# NQkJ? NRbjlk? ? !#$% ?i? !#$%e? ? ! NSbmqq? ? mqq? ! ?i? mqq? !e? mqq? NTp? ? !# ?i

16、? !#e? ! NUkJ? NVqudJqu? !=E? q? qaF OMflN? L? ? !#$L? N ONflO? L? ? !#$L? O OOflP? L? ? !#$L? P OPflQ? L? ? !#$L? Q OQflR? L? ? !#$L? R ORflS? L? ? !#$L? S =NR? ! ? ? ? L? ? ? ? ? Np_? ? !#$? %?&( ? N Op_? ? !#$? %?&( ? N PkJ? QdkaJ? RdkaJ? SpmdJ? ! Toa? ou? ! Uoppf? oppf? =E? !#F Vpmf? ? !#$ NMlN?

17、 ? !N ? !#$%&NRM NNlO? ? !O ? !#$%&NRM NOpml? ? !#$ NPlP? ? !P NQlQ? ? !Q NRlR? ? !R 13 12 11 10 987654321 2019 18 17 1625 24 23 22 2115 14 13 10741 1411852 15 12963 TKR-750 75 BLOCK DIAGRAM / ? TASW TAS SW MIC MIS RD DET EEPROM IC600 AT2408N10S12.5 SCL SDA SOE,STB1 CLK,DAT KEY15,VLI TXD1,RXD1,PTT T

18、XD0/RXD0 IO16 SFT SW Q600 2SK1824 X600 14.754M DAT,CLK,SOE Shift Reg. IC623 BU4094BCF RSSI RD A015 5C SB PTT/TXD HK/RXD KEY15 5V AVR 5V AVR 5V 5V IC506 TA78L05F IC507 TA78L05F Shift Reg.4 IC502 BU4094BCFV SPI SP CN605 CN604 CN603 D626 MINISMDE190 SPO INT SP TX-RX unit (CONTROL) X57 Shift Reg.3 IC505

19、 BU4094BCFV Shift Reg.2 IC504 BU4094BCFV Shift Reg.1 IC503 BU4094BCFV SWSWSW Q510 Q511 DTA114EUA x 5 SWSW SW Q508 AMPATT DET D501/502 HSM88AS VR501 IC501 NJM4558E Q501 2SC4116(Y) Q502 2SA1586(Y,GR) MIC Q516519 UPA627T Q521524 UPA627T KEY15 S501S502S503S504S505 PF15 Q512514 UPA627T D506D507 S507 Powe

20、r source SWMain DC Back UP BUSY CALL TX D505D504D503 VLI PSW DATSOSISISOSO SI CLK,SOE,STB1 CLK,SOE,STB1CLK,SOE,STB1CLK,SOE,STB1 CN502 CN600 CN601 CN501 VR601 AF VOL MIC JACK VLI Display unit X54-333 (A/2) Display unit X54-333 (B/2) SB SB D603 PTT/TXD HK/RXD SB SB PSW TEST/SPKR CLK,SOE,STB1 INV INV B

21、UP TEMP Q602 2SK1824 Q601 DTC114EUA 5 Q509 Q506 TKR-750 76 BLOCK DIAGRAM / ? Shift Reg.6 IC602 BU4094BCFV AMP RS232 DRIVER AMP DAC IC615 (A/2) M62364FP AI13 SPM,EMON,EPTT AMP RXD2/TXD2 IO16 AMP LD1,DAT,CLK SC IC617 (B/2) IC607 (A/2) IC607 (B/2) IC617 (A/2) IC620 ADM202EARN DAC IC615 (B/2) M62364FP M

22、O MB AMPLPF SWTD TDS IC605 (B/2) BU4053BCF AMP IC616 (B/2) NJM4558E IC616 (A/2) NJM4558E IC611 (A/2) NJM4558E IC619 (A/2) NJM4558E LPFAMP IC619 (B/2) NJM4558E CODEC IC614 AK4550VT AOUTR AOUTL AINL AINR IC610 TA75S01F AMP AMP IC608 TA75S01F RXI RXODEODEI TXI TXO TASW IC605 (A/2) BU4053BCF TAS SW MIC

23、MIS DP,CP EPR,EPT DT,CK STB4,SOE LD2,PSW RD DET IC630 TA78L05F IC624 XC62FP1802P 1.8V AVR 3.3V AVR 5V AVR 5V AVR 3.3V AVR 5V AVR IC625 XC62FP3302P IC626 XC62FP3302P IC627 TA78L05F 3.3D 1.8C 3.3A 5C SB DSP IC618 TMS320VC5402PGE INV INV IC612 TC7S04FU STDO STDI PWDA PWAD BDR0 BDX0 Q603 DTC114EUA DIVID

24、ER IC613 TC74VHC4040FT XF SW SFT Q604 2SK1824 X601 16.515M Interface IC603/606 TC74LVX4245FS LD1,DAT,CLK CPU IC604 M30622M4 FLASH ROM IC609 AT29C020-90TI Reset IC IC601 RH5VL42C A0A18, D0D7, WR,RD,CS0 WR,HCS, D0D7 A0D3 EEPROM IC600 AT2408N10S12.5 SCLK, SDAT SOE,STB1 CLK,DAT KEY15,VLI TXD1,RXD1,PTT E

25、PTT EMON AI13 TXD0/RXD0 IO16 SFT SW Q600 2SK1824 X600 14.754M SCLK LRCLK ASQ,RSSI FWD,BATT CN601 Option board BC14, CLRC,AC DAT,CLK,SOE,STB3 RXI/RXO TXI/TXO PTI/PTO RA RD TA TD DAT,CLK,SOE,STB2 Shift Reg.5 IC623 BU4094BCFV RSSI RD A015 AF AMP IC629 LA4422 AF SW MUTE INV Q605 DTC114EUA Q606 DTC363EK

26、IC622 TC7S66FU AM SPM IC621 TC7S00FU SW INV AMPSW Q610 2SJ506(S) Q609 DTC114EUA NJM4558E x 4 SB SPI SP D626 MINISMDE190 SPO X-RX unit (CONTROL) X57-695 (B/2) SB PSW MCLK RESET RXD0/TXD0 IC628 TA78L05F RA DET 8C 5M BUP,TEMP LDT,LDR FWD SB TDS TAS MIS RSSI ASQ SOE,DAT,CLK STB2,STB3,SFT DP,CP,EPR,EPT L

27、D1,LD2,LDR,LDT AM,AMPSW BCLK SCLK INV INV BUP TEMP Q602 2SK1824 Q601 DTC114EUA 5-TONE 5-TONE IC631 IC632 TA75W01FU TKR-750 77 BLOCK DIAGRAM / ? SWSW VCOA VCOB PLL SRR TCXO LPF 9CLR FCR W/N Fin EPR CP DP SW PSW SW SW 5V AVR 8V AVR DC AMP 8R 8T 5CT 8CT ATT PLL VCOB 9CLT VCOA LPF CVT QUDSW DETAMP CVR D

28、ET ASQ RSSI W/N PC 8T PC 8T DAC IC6 M62354GP SOE STB4 CK DT LD2 CK DT SRR,STT 8RC,8TC FAS FCT FCR PC EPR,EPT CP,DP,PSW BUP,TEMP, LDR,LDT FWD CN16 CN19 L2,3 A1 XF1 MCF(N) D1 DAN235K D2 DAN235K IF AMP Q3 2SC3356(R24) Q9 2SC3357 Q8 2SC3120 A3 RX VCO W/N W/N CN14 X2 16.8M K1 TCXO X3 16.8M FCT STT Fin IC

29、4 NJM7808FA A2 TX VCO 8V AVR 9V AVR IC10 TA7808F 5V AVR IC3 NJM78L05UA INV 8TC Q18 2SB1386(R) Q16 2SB1132(Q,R) IC11 NJM78L05UA 8RC INV Q17 DTC114EUA Q19 DTC114EUA 8CR LIPPLE Q12 2SC4116(GR) 5CR 8CLR 8CLTLIPPLE Q13 2SC4116(GR) IC5 AN8009M LIPPLE9CLR 9CLTLIPPLE Q15 2SC4116(GR) Q14 2SC4116(GR) IC7 BU40

30、94 BCFV D5 MA742 Q7 2SC4617(S) SWSW D4 DAN235K D3 DAN235K Q4 DTC144EUA FM IC IC9 : TK14489V 2/TXD2 CN602 MO MB P,CP EPT T,CK SOE PSW SB CN606 SW BUP K1 SW Final AMP Q5 RD70HVF1-01 FAS Q9 DTD123EK CN6 CN7 CN4 TX ANT FAB BACKUP DC AMP REF AMP PC FWD DET REV DET IC1 TA75W01FU 15A 15A Main DC CN1 CN3 +B

31、 Vcont TEMP Final unit X45-373 (A/2)X45-373 (B/2) TX-RX unit X57-695 (A/2) DET 8C 8C EMP LDR FWD X1 44.395MHz EPT CP DP CN15 CN5 SB RSSI ASQ MO MB CF1 (Wide) CF2 (Narrow) CM COUPLER D5D4 VR1 HSM88AS x 2 Q8 2SC4116(Y) IC2 TEMP IC3 NJM78L05UA TMP SW Drive AMP Q2 2SC3356(R24) Drive AMP Q3 2SC3357 Drive

32、 AMP Q4 RD55003S Control I/O (D-SUB) 455kHz 44.850MHz XF2 MCF(W) IF AMP Q2 2SC3357 RF AMP Q1 2SC357 Buff Q11 2SC3120 DC AMP IC2 NJM4558E IC1 NJM4558E CN18 RX ANT Q350,351: 2SK508NV(K52) D350353: 1SV282 IC300 SA7025DK IC300 SA7025DK Q350,351: 2SK508NV(K52) D350353: 1SV282 MB MO SW SW Q5 DTA144EUA Q6

33、DTC144EUA W/N 5V AVR FAS FAS TMP BUP PDT TMP BUP PDT L5,6,7 TKR-750 78 CN605 1 SPO 2 SPG 1 2 3 CN602 1 36 CN14 1 36 CN600 1 SB SB GND NC DAT PSW STB1 CLK SOE TXD1 K1 RXD1 K2 K3 K4 K5 VLI 5C MIG 20 MIC CN502 1 MIG MIC VLI 5C K4 K5 K2 K3 K1 HK/RXD SOE PTT/TXD STB1 CLK DAT PSW GND NC SB 20 SB CN601 HOO

34、K MIC MIG PTT GND NC SB NC GND 5M VLI CN501 VLI 5M GND NC SB NC GND PTT MIG MIC HOOK J601 1NC 5HOOK 2MIC 6MIG 3PTT 7GND 4SB 8NC CN604 NCNC NCNC NCRXD2 EMONTXD2 EPTTAI1 SCAI2 NCAI3 TXGDG AIO1TD AIO2TA AIO3RD AIO4RA AIO5RXG AIO6SPM NCNC TX-RX UNIT B/2 X57-695*-* INT SP TX-RX UN X57-695 DISPLAY UNIT A/

35、2 X54-333*-* TXO TXI RXO AC BC3 BC1 BC4 BC2 RXI GND PTI NC PTO CLRC 14 1 RXD2 DG AI3 TD RD NC AI2 SPM AI1 RXG RA TXD2 TA AIO2 NC EMON TXG AIO1 AIO4 NC SC AIO6 AIO5 EPTT AIO3 SPG GND SB RD GND RSI SB AO1 SPO AO5 SPI AO3 AO2 AO4 DISPLAY UNIT B/2 X54-333*-* MIC SPG SPO CONTROL I/O CN606 CN603 1 4 CN601

36、 LDT RSSI EPR PSW GND MO SC LD2 TMP CK GND FWD DET SOE SB CP BUP NC SB EPT ASQ 8C DT NC LDR STB DP MB GND NC GND QS NC SB SB 8C NC NC NC MO SOE LDT DP SB GND SC GND GND SB LD2 RSSI SB SB FWD MB 8C CP STB DT 8C EPT NC ASQ QS TMP PSW LDR BUP GND CK DET EPR 1 11 11 1 1 12 29 30 12 W9 W10 W11 8V A 8V A

37、9V A 5CR SB 8CT(8C) 9C SUB UN (RX VCO/ X58-47 SUB UN (TX VCO/ X58-47 SB SB 8C 1.8C 3.3A 1.8V AVR 3.3D3.3V AVR 3.3V AVR 5C5V AVR 5V AVR 5V AVR 5V AVR 5V AVR5CT 8CR 5V AVR 5V AVR 5M INTERCONNECTION DIAGRAM / ? ! TKR-750 79 M + + 1 2 6 47 9 8 10 12 13 14115 315 TX-RX UNIT A/2 X57-695*-* FINAL UNIT A/2

38、X45-373*-* FINAL UNIT B/2 X45-373*-* 8T PDT PC TMP NC FAS GND BUP B E B RX ANT TX ANT GND +B2 +B1 BACKUP BATTERY 2 ON 1 4 6 5 T 3 GND +B1 +B2 GND 1 FAB FAN CN5 CN4 CN3 CN1 1 8 CN6 CN8 CN7 CN15 1 3 CN16 CN18 CN19 E B B 3 1 NC BUP 8T TMP PC GND PDT FAS MAIN DC MAIN DC GND BACKUP 1 8 TEST/SPKR 912 W3 W

39、4 W5 W6 W7 W8 W2 W1 2 FAG +B 8V AVR 8V AVR 9V AVR SUB UNIT (RX VCO/PLL) X58-478 SUB UNIT (TX VCO/PLL) X58-479 5V AVR 5V AVR INTERCONNECTION DIAGRAM / ? ! M CN605 1 SPO 2 SPG + + 1 2 6 47 9 8 10 12 13 14115 3 CN602 1 36 CN14 1 36 CN600 1 SB SB GND NC DAT PSW STB1 CLK SOE TXD1 K1 RXD1 K2 K3 K4 K5 VLI

40、5C MIG 20 MIC CN502 1 MIG MIC VLI 5C K4 K5 K2 K3 K1 HK/RXD SOE PTT/TXD STB1 CLK DAT PSW GND NC SB 20 SB CN601 HOOK MIC MIG PTT GND NC SB NC GND 5M VLI CN501 VLI 5M GND NC SB NC GND PTT MIG MIC HOOK J601 1NC 5HOOK 2MIC 6MIG 3PTT 7GND 4SB 8NC CN604 15 NCNC NCNC NCRXD2 EMONTXD2 EPTTAI1 SCAI2 NCAI3 TXGD

41、G AIO1TD AIO2TA AIO3RD AIO4RA AIO5RXG AIO6SPM NCNC TX-RX UNIT B/2 X57-695*-* INT SP TX-RX UNIT A/2 X57-695*-* FINAL UNIT A/2 X45-373*-* FINAL UNIT B/2 X45-373*-* DISPLAY UNIT A/2 X54-333*-* TXO TXI RXO AC BC3 BC1 BC4 BC2 RXI GND PTI NC PTO CLRC 14 1 8T PDT PC TMP NC FAS GND BUP B E B RX ANT TX ANT G

42、ND +B2 +B1 BACKUP BATTERY RXD2 DG AI3 TD RD NC AI2 SPM AI1 RXG RA TXD2 TA AIO2 NC EMON TXG AIO1 AIO4 NC SC AIO6 AIO5 EPTT AIO3 SPG GND SB RD GND RSI SB AO1 SPO AO5 SPI AO3 AO2 AO4 GND +B1 +B2 GND DISPLAY UNIT B/2 X54-333*-* 1 FAB MIC FAN SPG SPO CN5 CN4 CN3 CN1 1 8 CN6 CN8 CN7 CN15 1 3 CN16 CN18 CN1

43、9 CONTROL I/O E B B 3 1 NC BUP 8T TMP PC GND PDT FAS CN606 CN603 1 4 CN601 LDT RSSI EPR PSW GND MO SC LD2 TMP CK GND FWD DET SOE SB CP BUP NC SB EPT ASQ 8C DT NC LDR STB DP MB GND NC GND QS NC SB SB 8C NC NC NC MO SOE LDT DP SB GND SC GND GND SB LD2 RSSI SB SB FWD MB 8C CP STB DT 8C EPT NC ASQ QS TM

44、P PSW LDR BUP GND CK DET EPR 1 11 11 1 MAIN DC MAIN DC GND BACKUP 1 8 1 12 TEST/SPKR 912 29 30 12 W3 W4 W5 W6 W7 W8 W9 W10 W11 W2 W1 2 FAG +B 8V AVR 8V AVR 9V AVR 5CR SB 8CT(8C) 9C SUB UNIT (RX VCO/PLL) X58-478 SUB UNIT (TX VCO/PLL) X58-479 SB SB 8C 1.8C 3.3A 1.8V AVR 3.3D3.3V AVR 3.3V AVR 5C5V AVR

45、5V AVR 5V AVR 5V AVR 5V AVR5CT 8CR 5V AVR 5V AVR 5M 80 JIHGFEDCBA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C21 C22 C27 C28 C29 C37 C42 C91 C96 C1 C99 C2 C3 1 3B B E C7 C9 D2 F1 K1 L2 L3 L4 L5 L6 CN51 C106 CN52 D51D52 C112 C118 R10 R11 R13 R14 R15 R16 R17 R18 R19 R20 R21 Q2 R26 C136 C137 Q3 E C B R28 C143 R1 R6 R7 R8 R9 R48 R49 R50 R52 R53 R61 R64 CN1 TX IN CN4 CN5 CN6 MAIN DC (RED) CN7 BACKUP (ORANGE) GND +B2GND+B1 CN8 GND (BLACK) C10 C11 C12 C13 C14 C15 C16 C19 J72-0910-19 (B/