TK-3180 .pdf

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1、 2004-6 PRINTED IN JAPAN B51-8690-00 (N) 961 UHF FM TRANSCEIVER TK-3180 SERVICE MANUAL GENERAL .2 SYSTEM SET-UP .2 REALIGNMENT.3 DISASSEMBLY FOR REPAIR .5 CIRCUIT DESCRIPTION .7 SEMICONDUCTOR DATA .13 COMPONENTS DESCRIPTION .14 PARTS LIST.16 EXPLODED VIEW.25 PACKING .26 ADJUSTMENT .27 TERMINAL FUNCT

2、ION.39 PC BOARD DISPLAY UNIT (X54-3470-XX) .42 TX-RX UNIT (X57-6940-10) .46 SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3470-XX) .50 TX-RX UNIT (X57-6940-10) .52 BLOCK DIAGRAM.60 LEVEL DIAGRAM.62 OPTIONAL ACCESSORIES KNB-31A/32N/33L .63 KSC-32 .63 SPECIFICATIONS. BACK COVER CONTENTS Cabinet assy (A02-3848-0

3、3) Cabinet assy (A02-3847-03) Knob (PTT) (K29-9302-23) Packing (G53-1599-01) Packing (G53-1598-01) Button knob (Side) (K29-9303-03) Front glass (B10-2752-22) Helical antenna (KRA-23 : Option) Knob (Volume) (K29-9304-03) Knob (CH selector) (K29-9305-03) TK-3180 KTK-3180 K3 Does not come with antenna.

4、 Antenna is available as an option. BA4VA OP: WUBO QSL IFM : P. C. 221005 P. O. BOX 436 XUZHOU OF CHINA TK-3180 2 INTRODUCTION SCOPE OF THIS MANUAL This manual is intended for use by experienced techni- cians familiar with similar types of commercial grade commu- nications equipment. It contains all

5、 required service informa- tion for the equipment and is current as of the publication date. Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions. These are issued as required. ORDERING REPLACEMENT PARTS When ordering replacement parts or equipment in

6、forma- tion, the full part identification number should be included. This applies to all parts : components, kits, or chassis. If the part number is not known, include the chassis or kit number of which it is a part, and a sufficient description of the re- quired component for proper identification.

7、 PERSONNEL SAFETY The following precautions are recommended for person- nel safety: DO NOT transmit until all RF connectors are verified se- cure and any open connectors are properly terminated. SHUT OFF and DO NOT operate this equipment near elec- trical blasting caps or in an explosive atmosphere.

8、 This equipment should be serviced by a qualified techni- cian only. SERVICE This transceiver is designed for easy servicing. Refer to the schematic diagrams, printed circuit board views, and alignment procedures contained within. GENERAL / SYSTEM SET-UP SYSTEM SET-UP Merchandise received License an

9、d frequency allocated by FCC Choose the type of transceiver Transceiver programming Are you using the optional antenna? Are you using the speaker microphone? A personal computer (IBM PC or compatible), programming interface (KPG-36), and programming software (KPG-89D) are required for programming. (

10、The frequency, and signalling data are programmed for the transceiver.) Frequency range (MHz)RF powerType12-key TX/RX 4505205WTK-3180 K No TX/RX 4505205WTK-3180 K3Yes YES KRA-23 or KRA-27 Helical antenna NO NO (Option) (Option) (Option) YES KMC-25 Are you using the voice guide If you press a key whi

11、le “CLONE LOCK” is displayed, the number that was pressed is displayed on the transceiver. Each press of the key shifts the display in order to the left. When you enter the password and press the or S key, “CLONE MODE” is displayed if the entered password is correct. If the password is incorrect, “C

12、LONE LOCK” is redisplayed. How to enter the password with the encoder; If the encoder is rotated while “CLONE LOCK” is dis- played, numbers (0 to 9) are displayed flashing. When you press the C key, the currently selected number is deter- mined. If you press the S key after entering the pass- word i

13、n this procedure, “CLONE MODE” is displayed if the entered password is correct. If the password is incor- rect, “CLONE LOCK” is redisplayed. 4. Power on the slave transceiver. 5. Connect the cloning cable (part No. E30-3325-05) to the universal connectors on the master and slave. 6. Press the S key

14、on the master while the master displays “CLONE MODE”. The data of the master is sent to the slave. While the slave is receiving the data, “PROGRAM” is displayed. When cloning of data is completed, the mas- ter displays “END”, and the slave automatically operates in the User mode. The slave can then

15、be operated by the same program as the master. 7. The other slave can be continuously cloned. When the S key on the master is pressed while the master displays “END”, the master displays “CLONE MODE”. Carry out the operation in step 4 to 6. Notes: Can not be cloned if the password (over write passwo

16、rd) is programmed to the slave. Only the same models can be cloned together. REALIGNMENT / DISASSEMBLY FOR REPAIR C + Power ON MINUTE HOUR DAY MONTH YEAR S S S S S Channel selector Channel selector Channel selector Channel selector Channel selector Completion DISASSEMBLY FOR REPAIR 1. How to Attach

17、the Rubber Spacer 1) Press the rubber spacer with fingers and insert it between the rubber spacer and the rear panel without crevice. Rubber spacer Rear panel Tighten the circle nut, after applying “THREE BOND 1401” to the circle nut. Cloning cable (E30-3325-05) MIC MIC Fig. 2 8. Firmware Informatio

18、n Mode Turn the transceiver ON with the Side1 switch held down. Then, the version is displayed during holding the Side1 switch. 9. Clock Adjustment Mode 9-1. Flow chart of operation TK-3180 6 4. How to Attach the VGS-1 1) Remove the 2 screws. 2) The tip of tweezers is put into the screw hole of the

19、cover and is pried, the cover will remove. 3) Use the 2 rubber cushions and attach them to the VGS-1. 4) Plug the VGS-1 into the VGS-1 connector of the PC board, pressing down on the top of the VGS-1 until secure. 5) The spacer turns the adhesive surface down. Next, push between the chassis and VGS-

20、1. 6) Replace the cover and tighten the 2 screws. Rubber cushion (G13-1995-04) 20 x 30 x 1.0 mm Rubber cushion (G13-1974-04) 21 x 21 x 2.5 mm VGS-1 Spacer (J30-1292-04) 4.5 x 24 x 3.0 mm VGS-1 VGS-1 connector DISASSEMBLY FOR REPAIR Checks the sheet is attached to the chassis. 3. How to Attach the TX

21、-RX Unit 1) In order to attach the TX-RX unit in chassis, dont put in the TX-RX unit aslant. Please level the chassis and the TX-RX unit and attach them. Sheet (G11-4326-04) Front-glass q w e 2. How to Stick the Sheet (G11-4326-04) 1) Remove the white separation paper of the sheet first (q) and stic

22、k the sheet on the front-glass (w). Next, remove the transparent separation paper of the sheet (e). TK-3180 7 1. Overview This transceiver is UHF/FM portable transceiver designed to operate in the frequency range of 450 to 520MHz. 2. Circuit Configuration by Frequency The receiver is a double-conver

23、sion superheterodyne with a first intermediate frequency (IF) of 59.85MHz and a second IF of 455kHz. Incoming signals from the antenna are mixed with the local signal from the PLL to produce the first IF of 59.85MHz. This is then mixed with the 59.395MHz second local oscil- lator output to produce t

24、he 455kHz second IF. This is de- tected to give the demodulated signal. The transmit signal frequency is generated by the PLL VCO, and modulated by the signal from the microphone. It is then amplified and sent to the antenna. 3. Receiver System 3-1. RF unit An incoming RF signal from the antenna ter

25、minal is passed through the antenna switch (D106, D107 and D213 are off) and then the bandpass filter (L215, L216). The bandpass filter is adjusted by a variable capacitor. The input voltage to the variable capacitor is regulated by the voltage output from the D/A converter (IC605). The signal is am

26、pli- fied by RF amplifier (Q207), and passed through the band- pass filter (L210, L211, L212). The resulting signal is applied to the first mixer (Q206), where it is mixed with the first local oscillator signal output from the frequency synthesizer to produce the first IF (59.85MHz). 3-2. IF unit Th

27、e first IF signal is passed through a four-pole monolithic crystal filter (XF200) to remove a adjacent channel signal. The filtered first IF signal is amplified by the first IF amplifier (Q205) and then applied to the lF system IC (IC200). The IF system IC provides a second mixer, second local oscil

28、lator, limiting amplifier, quadrature detector and RSSI (Received Signal Strength Indicator). The second mixer mixes the first IF signal with the 59.395MHz of second local oscillator output (crystal unit X200) and produces the second IF signal of 455kHz. The second IF signal is passed through the ce

29、ramic filter (CF201 : Wide, CF200 : Narrow) to more remove the adjacent channel signal. The filtered second IF signal is amplified by the limiting amplifier and demodulated by the quadrature de- tector with ceramic discriminator (CD200). The demodulated signal is routed to the audio circuit. ANT TX/

30、RX : 450520MHz ANT SW RF AMP PA AMP TX AMP 1st MIX MCF 59.85MHz CF 455kHz FM IF SYSTEM AF AMP SP 59.395MHz 390.15 460.15MHz PLL VCO MIC AMP MIC 450520MHz Fig. 1Frequency configuration IC200 MIX, DET, IF SWSW Q203IC606 DMUTE IC600 (1/2) AF AMP 2nd local OSC X200 VOL IC605 VC1 VC2 Q618 SSW SW ANT SW L

31、111,112 L113 L215 L216 BPFD106,107 D213,214 Q207 RF AMP Q206 1st MIX Q205 IF AMP ANT L210 L211 L212 BPF XF200 MCF 1st Local OSC (PLL) CF200 CF201 AQUA-L IC607 HSDO SW Q605 (1/2) AM2 IC609 AF PA INT. SP EXT. SP Fig. 2Receiver section CIRCUIT DESCRIPTION TK-3180 8 3-3. Wide/Narrow switching circuit Wi

32、de and Narrow settings can be made for each channel by switching the ceramic filters CF201 (Wide), CF200 (Nar- row). The Wide (low level) and Narrow (high level) is output from IC502. When a Wide (low level) is selected, Q200 (N-ch) turn off and Q200 (P-ch) turn on. When a Narrow (high level) is se-

33、 lected, Q200 (N-ch) turn on and Q200 (P-ch) turn off. D201 and D203 are switched to ceramic filters when a high/low level is selected. Q204 turns on/off with the Wide/Narrow and the IC200 detector output level is changed to maintain a constant out- put level during wide or narrow signals. When SP-M

34、IC is attached, SSW is connected to GND at inside of SP-MIC. For this reason, Q618 is turned off, and the AF signal is input only to amplifier for EXT SP of IC609. Change of INT/EXT SP refer to Fig. 4. AM1AM2SSWVC1VC2SP HLHHLINT HLLLHEXT LHHLLMUTE LHLLLMUTE MXO AFOUT QUAD IFOUT IFI W/N5R D314C201 C2

35、00 C215 C217 R208 R211 R215 R212 R209 C209 R205 Q200 D201D203 CF200 CF201 IC200 R222 R224 Q204 R225 5C AFOUT W/N CD200 “H”: Narrow “L” : Wide Fig. 3Wide/Narrow switching circuit SW SW Q618 VC1 2 VC2 8 B AF AM1 SSW AM2 Q616 (1/2) Q617 Q605 Q613 Q612 5VP IC609 IC605 IC607 INT.SP EXT.SP AF 3-4. Audio a

36、mplifier circuit The demodulated signal from IC200 goes through the mute switch (Q203), IC600 (1/2) and IC606, high-pass fil- tered, low-pass filtered, high-pass filtered and de-empha- sized by IC607. The signal then goes through mute switch (Q605 1/2), and an electronic volume control (IC605), and

37、an AF switch (Q618 is on), and is routed to audio power amplifier (IC609), where it is amplified and output to the internal speaker. The audio mute signal (AM1) from the IC502 becomes Low in the standby and Q612, Q613 which are power supply circuit for IC609 turn off. Also, the audio mute signal (AM

38、2) becomes High to turn Q605 (1/2) off. When the audio is output, AM1 becomes High to turn Q612, Q613 on, and volt- age is supplied to power terminal VP of IC609. Also, AM2 becomes Low to turn Q605 (1/2) on. The speaker is switched by the logic of speaker switching terminal SSW on the universal conn

39、ector. When SP-MIC is not attached, the logic of SSW becomes High and SW (Q618) is turned on, and the AF signal is input to both amplifiers of IC609. 3-5. Squelch circuit The output from IC200 enters FM IC again, then passed through a bandpass filter. The noise component output from IC200 is amplifi

40、ed by Q201 and rectified by D202 to produce a DC voltage corresponding to the noise level. The DC volt- age is sent to the analog port of the CPU (IC502). And IC200 outputs a DC voltage (RSSI) corresponding to the input of the IF amplifier. The CPU reads the RSSI signal via pin 125. IC502 determines

41、 whether to output sounds from the speaker by comparing the input voltage of pin 124 and pin 125 with the preset value. DET BPF AMP DET NOISE AMP IF AMP RSSI 12 7 Q201D202 IC200 : FM IF IC IC502 CPU 125 124 SQ close Preset valuePreset value ANT input levelANT input level SQ voltage RSSI voltage SQ o

42、pen Fig. 4Audio amplifier circuit Fig. 5Squelch circuit Fig. 6Squelch and RSSI voltage vs ANT input level CIRCUIT DESCRIPTION TK-3180 9 4. Transmitter System 4-1. Microphone amplifier The signal from the internal microphone goes through the mute switch (Q614). When the SP-MIC is not attached, the mi

43、crophone switch- ing terminal (MSW) on the universal connector becomes High, and mute switch (Q614) is turned on. When the SP- MIC is attached, MSW is connected to GND at inside of SP- MIC. For this reason, Q614 is turned off, the internal micro- phone is muted, and only the input of the external mi

44、cro- phone is supplied to the microphone amplifier. The signal from microphone goes through D/A converter (IC605), mute switch (Q610), and amplified by IC608 (1/2) and limited by AGC circuit composed of D601, D602, Q606 and Q607. IC607 is composed of high-pass filter, low-pass filter and pre-emphasi

45、s/IDC circuit. The signal passes through the D/A converter (IC605) for the maximum deviation adjustment, and enters the summing amplifier consisting of IC600 (2/2), and is mixed with the low speed data from the CPU (IC502). The output signal from the summing amplifier goes to the VCO modulation inpu

46、t. The other output signal from the summing amplifier passes through the D/A converter (IC605) again for the BAL adjustment, and the buffer amplifier (IC602), and goes to the TCXO modulation input. 4-2. VOX The IC608 (2/2) amplify the audio signal captured in the microphone, and then the signal is c

47、onverted into the DC voltage D603 rectifies. The DC voltage activates the CPU (IC502), and the VOX starts. 4-3. Drive and Final amplifier The signal from the T/R switch (D100 is on) is amplified by drive amplifier (Q100, Q101 and Q102) to +1517dBm. The output of the drive amplifier is amplified by the RF power amplifier (Q105) to 5.0W (1W when the power is low). The RF power amplifier is MOS FET. The output of the RF power amplifier is then passed through the harmonic filter (LPF) and antenna switch (D106, D107 are on) and applied to the antenna termina