¢ TM733A/E KENWOOD ( SERVICE MANUAL | © 1991-11 PRINTED IN JAPAN 851-8144-00(0) 1740 Knob (VFO) Microphone (27-3124-00) (791-081605) Manz (791-0517-05) KMS (791-0821-08) E/62,63 Panel ‘ (A62-0174-03) KP.n,n02,63, (A62.0175-09) E523 °° Knob (POWER) — {K27-3121-08) é Knob (Low) ¢ (K27-3122:08) Metallic eabinet (BOTTOM) Knob (Ou (aor-2081-13) Knob (MAIN) Knob (CALL) Knob (SEL) fore (K29-3186-08) —(K27-3120008) x6 {K27-9128-04) ee ‘ Knob (Sat) (29-4576-08) x2 CIRCUIT DESCRIPTION 2 CONTROL UNIT (X57-400X-XX) (C/4) 67 SEMICONDUCTOR DATA. 18 VOLUME UNIT (X57-400X-XX) (D/4) 70 DESCRIPTION OF COMPONENTS 22 LCD ASSY (B38-03XX-15) 70 MODIFICATION .. 26 SCHEMATIC DIAGRAM ail PARTS LIST. 27 BLOCK DIAGRAM .. 74 EXPLODED VIEW 45 LEVEL DIAGRAM 76 PACKING. 47 MC-45 (MULTIFUNCTION MICROPHONE) 7 ADJUSTMENT 48 MC-45DM. ¢ TERMINAL FUNCTIONS essen 66 (MULTI FUNCTION MICROPHONE WITH AUTOPACH ) ..78 PC BOARD VIEWS/CIRCUIT DIAGRAM PG-4K/L (PANEL SEPARATE KIT K : 4M: 7M). 79 é AAMHz TX-RX UNIT (X57-400X-XX) (A/4) nue 57 TSU-7 (CTCSS UNIT) ne BO 430MHz TX-RX UNIT (X57-400X-XX} (B/4)..... 62 SPECIFICATIONS BACK COVERTM-732A/E CIRCUIT DESCRIPTION Outline Accessories ‘The TM-732/VE are 144/430MHz FM dual band car Pats rare Fare No | Destination sade transcaivers designed for armature radio communica~ LP [olaclna 2] tions, Waren ard Bagoai030_|1 Wren cad 46-0619.00 Tt + Features Warranty card e46-002200_| [4 1. Complete compact dual band function. [insrseton manual | a62ov0r.00 [1 [11 [ala|a|1 {1 2. The extended cable kit (option) car be used to dis» _—[ Ineuucton manual [962020200 | {+ 1 connect the panel with one touch of a finger. Free | Instwction manuel _| @82.0228-00 aay setting is made possible. [oc powercora | exoariios [i [af ]a{a fa [4 3. Independent receiving function enables the simu Fuse (1581 revooiros (t/t 1 [a {ala ]t ‘taneous receiving of 144MHz and 430MHz bands. ‘Mic hook, zooste24 [t/t (Both bands independent, full display, volume, Mebie mountbracker| J20aase-03 [1 l1fa[a [a [a [3 squelch, signaling, external loudspeaker.) Mic hookserew | Naego1o4 [1 [1 4, Large LCD (68.0 x 19.0 mm Screw set neocoaatos [rit [t |i [a ]a |i ft 5. Simple operation like monoband type. Microphone To1-081605 aft | 6. Both 144MHz and 430MHz bands can be received ‘Microphone rorastz0s [tft] | [a ata time. Microphone To10821-05 Tah 7, Duplexer buit in (Types K and P excluded). Spanner wore ft Pt 8. Smeter squelch function built in. Switching to noise squelch provides the adjustment of S-meter squelch level with a squelch volume. 9, With'a maximum of 64 memory channels, the Units for Each Model and Destination switching of a memory channel mode permits Pars No, Uritname | Destination code ‘changing the number of split end normal memory [PIM woh € [ez channels for each band, ( 50 channels in full split ¥ETAOOOTT eK one _[1 fA memory) X87-4000-21 DEAK unit Ta 10, DTSS and paging functions builtin. X67-4002-71 TAK unt That +11, Wire (microphone jack connected) and wireless B360366-16 LeDAsty [1 | {OTMF) coulom® function builtin 3840967-16 LCD Assy i 1330-0068-18 LCD Ass Th B98 0370418 Lcd Ass'y at B36 0971-18 LGD As n List of Destinations we Destination] Destaton Frequency renge (wa Tapani] code aa 0) vad] 430 “TWEE | Nn America x TK i4a.00-1a7a0s | 498.00-449.905 [50 | 36 MAX 118.00-173.995, TweTaaA | Canada P TK tak oo-1a7.96 | 600-499.905 [60 | 38 21 AX_118.00-173.995, TWeTaIA_| Other counties um 144.00-147.995 | _490.00-400.005 | “60 [38 “TwT228 | Other counties wa 7X 19600-17805 | -2 «10.00-469.805 | 50 | 35 18x 118.00-173.895, THETA | Other counties wi 7X 196.00-173.895 | *2 #7000-469.005 | 50 | 36 s AK 118.00-173.895, TNETS2E_| Ewopean counties [EE 7a4.00-145.995_ | «3000~00.506 [60 | 96 TWeTGZE | Eutopeen counties | E2 7K 136.00-178.996 | “2 47000-489.905 [60 | 36 *1_RX_116.00-173.95, "7 Guarantee frequency range 144.00-147 985, 118.00-136.998 +2: Guarantee frequency range 490.00~499.995 AM( TM-732A/E CIRCUIT DESCRIPTION Frequency Configuration ‘The TM-732A/E has separate PLL and IF units for the VHF and UHF bands, so it can receive signals on both bands at the same time. Ithas a VHF sub-receiver to receive a UHF signal in the VHF band anda UHF sub- receiver to receive the VHF band signal in the UHF band The 144MHz band receiver mixes the received sig- nal with the first local oscillation frequency of 188,08 to 193,045MHz (K,P,M), 189,05 to 191,045MHez (E) to produce the first intermediate frequency of 45.08MHz, The signal is then mixed with the second local oscila- tion frequency of 45.505MHz to produce the second intermediate frequency of 456kHz. The 430MHz band receiver mixes the received sig- nal with the first local oscillation frequency of 379.475 to 891.47MHz (K,P), 371.475 to 381,47MHz (M,E) to produce the first intermediate frequency of 58.525MHz. The signal is then mixed with the second local oscillation frequency of 58.0MHz to produce the second intermediate frequency of 455kHz. ‘The 144MHz band sub-receiver mixes the received signal with the first local oscillation frequency of 202.525 to 208.52MHz (K,P,M), 202.528 to 204.52MH2 (E) to produce the first intermadiate fre- quency of 58.525MHz. The signal then goes to the second intermediate frequency section of the UHF receiver to produce the second intermediate fre- quency of 455kHz, ‘The 430MHz band sub-reosiver mixes the received signal with the first local oscillation frequency of 392.95 to 404.945MHz (K.P), 384,95 to 394,945MHz (M.E} to produce the first intermediate frequency of 45,05MHz. The signal then goes to the second inter- mediate frequency section of the VHF receiver to pro- duce the second intermediate frequency of 455kHz. ‘The recsivers and sub-receivers for the 144 and, 430MHz bands all use double conversion. The trans- mitter contains a PLL circuit that directly generates and divides down carriers for both bands. The transmis- sion signals are amplified by a linear amplifier and transmitted. The main circuits are used to transmit signals even if a sub-band is being used. 7 4 rive | oe Eb-LEh LEH Sh aE “3 Mix y : ._ ||. E|~ somite ct = Fee Tear te A Mx “ T Secu te iz Fig.1 Frequency configurationTM-732A/E CIRCUIT DISCRIPTION 144MHz Band Transmit Circuit + Outline The transmit circuit produces the desired carrier frequency directly, and directly modulates its fre- ‘quency by means of a vari-cap diode. + Modulator circuit ‘The audio signal amplified and limited by the control Unit passes through a splatter filter, is mixed with the sub-tone from the microcomputer, and input to PLL Unit (KCH11} IC9. The PLL unit directly modulates the cartier frequency with the input audio signal by using a vari-cap diode to control the frequency of the VCO. + Younger-stage circuit ‘The signal output from the PLL unit goes to drive circuit HIC 1C10 (KCB11). The HIC can provide a stable drive output for the final module without adjustment because it has a large bandwidth. The drive signal input to the power module accord- ing to the output power is amplified to the specified level + APC and power switching circuits ‘The automatic transmission output control circuit (APC) detects and partially amplifies the transmission output with a diode, and controls the DB voltage for the drive stage and final module to keep the transmit output constant, The power switching circuit can switch the power by changing the setting resistor for the APC control voltage with a signal from the shift register (IC8) 430MHz Band Transmit Circuit + Outline The transmit circuit produces the desired carrier fre- quency directly and directly modulates its frequency by means of a vari-cap diode. + Modulator circuit The audio signal amplified and limited by the control unit passes through a splatter filter, is mixed with the sub-tone from the microcomputer, and input to PLL unit (KCH2) 1C207, The PLL unit directly modulates the carrier frequency with the input audio signal by using a vari-cap diode to control the frequency of the Vco. + Younger stage circuit ‘The signal output from the PLL unit goes to drive circuit HIC 1C209 (KCB14), The HIC can provide stable drive output for the final module without adjustment because it has a large bandwicith. + Power amplifier circuit ‘The drive signal input to the power module accord- ing to the output power is amplified to the specified level. + APC and power-switching circuits The automatic transmission output control circuit (APC) detects and partially amplifies the transmission ‘output with a diode, and controls the DB voltage for the drive stage and final module to keep the transmit output constant. The power switching circuit can switch the power by changing the setting resistor for the APC control voltage with a signal from the shift register (IC206). To protect the high power model from excessive temperature rise, there is a thermal switch to reduce the power automatically if the tem- perature reaches a certain levelTM-732A/E CIRCUIT DISCRIPTION 144MIHz Band Receive Circuit ‘The received 144MHz band signal from the antenna passes through a transmission/reception selection di- ‘ode switch. ‘The signal then passes through an an- tenna matching coil in the receiver front end and a di- vider, and is amplified by a GaAs (gallium arsenide) field-effect transistor. The unwanted components of the signal are eliminated by @ band-pass filter consist- ing of a three stage variable capacitor. The resulting signal goes to the first mixer, is mixed with the first local oscillator signal from the PLL circuit, and so con- verted to the first intermediate frequency of 45.05MHz, ‘The unwanted near by signal components are eliminated by a two stage MCF. ‘The first intermediate frequency signal is amplified and input to FM IF HICIC1 (KCD04). This signal is then mixed with the second local oscillation frequency of 45.505MHz to produce the second intermediate fre- quency signal of 455kHz. The unwanted near by signal components are eliminated by an FM ceramic filter. ‘The resulting signal is input to IC1 again, amplified, and detected to produce an audio signal + Signal strength meter ‘The signal strength meter output voltage of FM IF HIC IC1 (KCDO1) is input to the control unit. tis then digitized to drive the bar meter of the LCD. 430MHz Band Receive Circuit The received 430MHz band signal from the antenna passes through a fier in the final unit and a transmis sion/reception selection diode switch. The signal then passes through an antenna matching coil in the re- ceiver front end, is amplified by a GaAs (gallium arsenide) field-effect transistor and joint type FET, and passes through two 2 pole dielectric fiers. The result- ing signal goes to the first mixer, is mixed with the first local oscillator signal from the PLL circuit, and so con- verted to the first intermediate frequency of 58.525MHz. The unwanted near-by signal compo- nents are eliminated by @ two stage MCF. The first intermediate frequency signal is amplified and input to FM IF HIC IC201 (KCD04). This signal is then mixed with the second local oscillation frequency of 58.07MH2 to produce the second intermediate fre- quency signal of 455kHz. The unwented nearby signal components are eliminated by a ceramic fiter. The resulting signal is amplified, and detected to produce an audio signal. + Signal-strength meter The signal strength meter output voltage of FM IF HIC 1C201 (KCD04) is input to the control unit micro- computer to drive the signal strength meter. Kom Rating Tem Rating Contor frequency 6 050M Center frequency aM ass bandwidth =£7.8kHe or more at 348 ‘Alteration bandwidth | #22kHe or less at 2508 Guaranteed attenuation | 80dB or more within Fo- 9102 | (Sourious:#1MH2 at 4088 or moze) | ‘Attenuation bandwidth | &26kHe or less at 2648 S5kdz or oss st 60d, | Gvarantoed attenuation | 4008 or more within +75 to TOO0K2| [ [Pass bendwith [28 zor move at 348 | Fipple 108 or loss L £048 or more at #5 10K!z Insertion lose “4dB or less ] eo eae [cu onal Terminating impedance | 800k + 10%, 29F 2 10% [Insertion oss “448 o ess Table 1 MCF (L71-0409-05) (TX-RX unit XF1) [Terminating impedence | 900m 10%, 2653 10% Table 1 MCF (L71-0410-05) (TX-RX unit XF201) [poe 2 oes (inst ES Tom ating 1 [Nein centr requeney | a66Kr2 a f hem Rating a bandh 6.0K or more from iF) Tal cnr ney —_| ASS 5008 bandwith Tasos: tem aeoeer | | 8uB bandh 48.06 arma (ron ERT 50a ondwieh EIZSKHZ or loss (rom 455eH2) inserton ose 68 or less at asirum ett pri Guaranteed attenuation | 3548 or mor win sido of 5 | WO matching terminating | 2.088 | impecence J Table 2 Ceramic filter CFWIM455F (L72-0872-05) (1%-RX unit CFI) Fipple 348 less fini 5 Insertion foe (648 of less ft maximum ouput po) Guaranteed attenuation | 3508 or more {win R751) WO matching terminating | 20K impedance, Table2 Cerami filter CFWMA55F (L72-0372-05) (TX-RX unit CF201)—TM-732A/E CIRCUIT DISCRIPTION 144MHz Band Sub Receive Circuit ‘The received signal from the antenna goes to the receiver front end for the 144MHz main band. The signal is amplified by a GaAs (gallium arsenide) field- effect transistor (Q1}), input to the main 144MHz main circuit and sub circuit by the divider circuit, and input to the 430MHz band sub circuit. The unwanted signal components are eliminated by the filter circuit of the sub-teceive circuit, and the resulting signal is amplified by transistor 0211. The unwanted signal components are further eliminated by another filter circuit. The re- sulting signal is then mixed with the first local oscilla: tion frequency by the FET (0212) mixer to produce the first intermediate frequency signal of §8.525MHz. The signal is input to the 430MHz band main circuit, and the 144MHz sub band signal is received by the rain circuit ar @) ne xF201 I tif Fig. 2 144MHz band sub receive circuit block diagram 430MHz Band Sub Receive Circuit The 144MHz unit can receive 430MHz band signals. The received signal from the antenna passes through a transmissior/reception selection diode switch in the final section of the 430MHz unit, The signal then passes through an antenna matching coil, andis ampli- fied by @ GaAs (gallium arsenide) field-effect transistor (0201), The amplified receive signal passes through a 201 divider, and is amplified by IC3 (high frequency wide- band amplifier) of the 144MHz unit. The unwanted signal components are removed by a band-pass filter. The resulting signal goes to the first mixer, is mixed with the first local oscillator signal from the PLL circuit, and so converted to the first intermediate frequency of 45,05MHz. The subsequent receive operation is the same as for the 144MHz band. Main 430MH2 band as 13 Pcte7ec| /\ (8) wo Wor TTT oe Fig. 3 430MHz band sub receive circuit block diagramTM-732A/E CIRCUIT DISCRIPTION Squelch Circuit The panel unit microprocessor reads the angle of rotation of the squelch VR, and converts it to a 6 bit digital value, The panel unit microprocessor transfers les cs a a a the data to the control unit microprocessor, which in turn transfers the data to ICS (BU40948F). The data is converted to analog by analog switch IC4 (BU40668F) according to the output from ICS. les Ics, 144MHz Band Shift Register Circuit ‘The ES, CK, and DT serial data from the control unit is sent to IC8 (BU40948F) to perform the control op- erations outlined in the following table. 4 Squelch circuit . 430MHz Band Shift Register Circuit The serial data from the control unit is sent to IC206 {8U40948F} to perform the control operation outlined in the following table, Fiato,| Name Funetion PiaNo,| Name Funetion 1_| Strobe | Enable nt = | Swobe | Erabie aut 2 [bate | sera dats input 2 ata —[ Bate input 3] Clock | Clock input 3 | Chock | Goek input — [4 [at [7xax selection. Low when TXis set ‘4 [Qt | DORK selection, | G2] TX power selection 5 G2 | TK power selection. "HH power __| UMD and LOW power "Hl power [03 | TXpowerssecion, °H": MID power & [OS Tepower selection 7 Las —| Fan eon "A" Tansmission Hed LOW power,“ : MID power set 7a ote | Ves | GND 10 [as - = 9 | Os a1_| ae 10 | Q's = 12 [O07 Receiving power switching 7) o8 siving pov Bang “Us Main recoton eC YHE band man reception ape - td —~ — 4 14 | Q5 | Receiving power switching 13 | G8 | Feceivng power swiching reiewcteee 1S UNE band su ception ae poe 14 [05 — [is Tvo0 Fav = 16 [ a [av - 16 [von |vTM-732A/E CIRCUIT DISCRIPTION SOL Circuit ‘The SQL circuit varies the voltage output from 1201 {KCD04) by the electronic VR with the same analog switch as used for the 144MHez band, 144MHz Band 8T/8R Switching Circuit and Unlock Circuit A high signal is applied to the base of 016 and Q19 from the shift register during reception, Q16 is turned on, BR is output, and Q18 and Q17 are turned off. 8T is not output. 8R is tumed off, and 8T is turned on during transmission. The unlock signal is input to Q19 from the PLL unit. When the PLL is unlocked, this signal goes high. So, 8T is not tumed on, and transmission does not occur even if a signal arrives from the shift register. 5 144MHz band 8T/8R swi unlock circuit ig circuit and 430MHz Band 8T/8R Switching Circuit and Unlock Circuit A high signal is applied to the base of 0215 and 214 from the shift register during reception, 216 is tumed on, 8R is output, and 217 and Q218 are turned off. 8T is not output. 8R is turned off, and 8T is turned ‘on during transmission. The unlock signal is input to 214 from the PLL unit. When the PLL is unlocked, this signal goes high. So, 8T is not turned on, and transmission does not occur even if a signal arrives from the shift register. ig.6 430MHz band 8T/8R switching circuit and unlock circuit AF Signal System + Outline Detection signals RAV and RAU from the 144MHz and 430MHz units go to the mute and beep circuits of the control unit. The signals pass through the elec- tronic VR, analog signal switching circuit, and speaker switching circuit of the 144MHz unit, and are output to the power amplifier and speaker. + Beep and mute circuits To sound the beep when a key is pressed, a pulse is output from P20 of the CPU, mixed with the output through the buffer (2401) of monitor IC401 (DTMF encoder) for DTSS operation, passed through the beep mute circuit (408 and 406) for each band, mixed ‘with the detection signal for each band, and sent to the electronic VR. The audio mute circuit (0404 and 0409) for each band works only when the beep sound is out: put from the CPU. The signal output from the elec- tronic VR passes through analog switch IC404 and the audio mute circuit (Q402 and Q403}, and is output to the speaker switching circuit. The CPU transfers data to the electronic volume in the same way as for the TM-941 €FO TM-732A/E CIRCUIT DISCRIPTION ve 100 | (a2) — 400 recon mate oo Un ‘ores ‘AOt switching cirevit scios © sos ure 20 cou ean Digital Control Unit + Outline The digital control unit controls functions with a single microprocessor (CPU). It consists of the tone ‘output circuit, DTMF encode/decode circuit, electronic VR circuit, and analog signal switching circuit. It con- tains the reset and backup circuits, microphone ampli fier circuit, and microphone key input circuit. Speaker switching circuit The 144MHz unit has two speaker jacks, Jt and J2. AF signals can be output to various combinations of speakers, including the internal speaker. If no external roo [40 Vy 7. AF signal system block diagram speaker is connected to J1, pins 10 and 11 of IC7 go low, and AF signals AO and AO1 from the control unit are added. The resulting signal goes to power ampli- fier IC6. If an external speakeris connected to J, pins 10.and 11 of IC7 go high, and AO and AOT are input to C6 separately. Combinations of AF signals are listed below. oO ro} Internal speaker External speaker Tnternel speaker | External spesker Externe speaker | External spesker ‘speaker only External speaker (2) External speaker (i Internal speakers 2) Power fine I Fig.8 Speaker switching circuitTM-732A/E CIRCUIT DISCRIPTION Tone Output Circuit The signal is input to R402 (ladder resistor) from P61 ‘to P63, and P70 to P73 of the CPU, and converted from digital to analog to produce 38 signals of 67.0 to 250.3H2, Figure 9 shows the internal configuration of Ra02, Tone owout % Fig. 9 Internal configuration of R402 DTMF Encode/Decode Circuit + DTMF encode/decode circuit Data is transmitted to 1C401 {LR40B9BN) from PAO to P43, and P50 to P53 of the CPU, and a DTMF signal is output from IC401 + DTMF decode circuit ‘When the received signal or a signal from the DTMF microphone (option) enters C402 (LC7385M) and an effective tone pair is detected, STD goes high, is input to RIZ of the CPU, and data is read into P90 to P93, 10403 prow cao IK TMF ou Poo~| —__Ficaoe | 2 oo >] Mic, Pre }#——s7 eo Fig. 10 DTMF encode/decode circuit 10 Analog Signal Switching Circuit 1C404 switches the audio signal and DTMF MIC/RO, and IC405 switches between V/U of MIC RD, OTMF RD, and CTCSS RD. + Audio signal switching Switches the VHF AF signal and UHF AF signal from the electronic VR to AO1 oF ACO. + DTMF MIC/RD switching Switches the DTMF decoder IC input to the DTMF signal in the detection signal or the TMF signal from. the microphone. + MIC RD V/U switching ‘Switches the signal output from microphone pin RD to RDV or ROU. + DTMF RD V/U switching Switches the OTMF decoder IC input to RDV or RDU. ‘The signal passes through this circuit and the DTMF. MIC/RD switching circuit, and goes to the DTMF de- coder IC. When switching to either ROV or RDU, the signal is switched to the band for which a busy sense signal (SC) is being input to the CPU. If busy sense signals for both bands are being input to the CPU at the same time, the last detected band is used. + CTCSS RD V/U switching ‘Switches the signal to the CTCSS unit (TSU-7 op- tion) to RDV or ROU, When switching to either ROV or RDU, the signal is switched to the band for which a busy sense signal (SC) is being input to the CPU. If busy sense signals for both bands are being input to the CPU, the circuit is switched in 500msec intervals. [ior 17 AOO=VAF AF, AOT-UHF AF | uti sige switching) | Ls AOO=UHF AF, a | P100 H : OTM signlin the detection signal (OTM Neo switching) |: OTME signal from miccophone P10 HRV (wiCRO WU swing | U: ROU : 103 HiROv (TMF RO W/Uswitting) | H: ROU _ Pio HiROV {oress no wu swt! | L: ROUTM-732A/E CIRCUIT DISCRIPTION 2 = Fig. 11 Analog signal swite Reset and Backup Circuits When the power supply is connected, a low level pulse of about msec duration is output by the reset circuit, This pulse goss to RESET of the CPU for 2 Jalal 1g circuit Power-on reset. When the power supply is, discon- ected, the voltage drop of the 13.8V line is detected, and INT4 of the CPU goes high. The CPU enters the backup mode. Fig. 12 Reset and backup circuits Microphone Amplifier Circuit The audio signal from the microphone goes to three operational amplfiors. Thase amplifiers constitute @ pre-emphasis circuit, amplifier, limiter, and splatter cir- cuit that eliminates unwanted high frequency compo- nents, ec se gels The modulator circuit directly modulates the fre- quency of the VCO for both the 144 and 430MHz bands by means of a vari-cap diode, ican v2) Fig. 13 Microphone amplifier circuit "TM-732A/E 2 CIRCUIT DISCRIPTION € Microphone Key Input ‘The microphone UP, DOWN, and function keys are connected to the analog input of the CPU, and each function is activated according to the voltage applied when a key is pressed. 8 vows mao a Pas ‘& wh hh he he Fig. 14 Microphone key input Panel Unit + Outline The panel unit controls the display circuit, memory, and dimmer circuit with a microprocessor. The keys. and the rotary encoder are connected directly to the microprocessor. Dimmer Circuit ‘The dimmer circuit can change the brightness of the lamp in four steps, and tur the lamp off. Q3 amplifies the error of the stabilized power supply using a 5V ref- erence voltage. The output voltage can be controlled in four steps by grounding a combination of the BP2 and BP8 ports of the microprocessor. If the imped- ance of BP1, connected to the emitter of Q2, is made high , Q2 is turned off. No lamp voltage is output, and the lamp goes off, Tolamp BFF BP BPA tea (cu) Fig. 15 mer circuit Reset Circuit © When the power supply is connected, the 1C1 (L78LRO5B-FA) output (pin5} becomes SV, and after about 100msec, RESET (pin4) goes high. The signal is input to the RESET pin of the CPU (IC4) to reset it. Key and Rotary Encoder Input Circuit Each panel key signals input from its own port. The MR, VFO, and MHz keys are pulled up by external ro- sistors (the PSW key is pulled downl, and the other keys are pulled up by software, The rotary encoder inputs signals directly to the microcomputer. Display Circuit ‘The display circuit consists of the CPU, LCD driver ‘and peripheral circuits, and LCD, The LCD is driven dynamically with 1/2 duty. Part of the display-is con- trolled by the CPU (IC4), and part is controlled by the LCD drivar {IC5), as shown in the figure, Data is trans- ferred serially from P40, P41, and P42 of the CPU to the LCD driver. gGaGgas eas EcSsB S083 car” Controled | cantata bythe LCD driver (C5) bythe cPUUCS) | Fig. 16 Display LCD Memory e Memory channel data is stored in IC6 (non volatile memory). Data is written according to the serial data from P31, P32, and P33 of the microcomputer (IC4), and is read by P23.CIRCUIT DISCRIPTION 430MHz Band PLL Synthesizer ‘The VCO and PLL circuits comprise a hybrid inte- grated circuit housed in a solid shielded case. Com Parison frequencies are produced by dividing a 12,8MH2 reference frequency from the 144MHz band Unit to correspond to the §, 10, 18, 20, 12.5, and 25kHz channel steps, When UHF band signals are received, 379.478 to 391.47MHz {K,P), 371.475 to 381.47MHz (M, E] is gen- erated, and when UHF band signals are transmitted, 438,00 to 449.995MHz (K.P), 430.00 to 439,995MHz (ME) is generated. When VHF sub band signals are re- ceived, the VCO in the PLL unit stops, and the VHF sub VCO on the mother board is operated to produce 202.525 to 206.52MHz (K,P,M), 202.525 to 204.52MHz (E), 250520) Scart? ese0re BUF vase Fig. 17. 430MHz band 144MHz Band PLL Synthesizer ‘The VCO and PLL circuits comprise a hybrid inte- grated circuit housed in a solid shielded case. X2 (12.8MH2) is generated by the PLL IC (M56760FP) in the HIC, and is divided to produce a 6 or 6.25kHz refer- ence frequency. Part of the 12.8MHz output is passed through the buffer amplifier, and goes to the 430MHz unit. Comparison frequencies are produced by dividing 29035245) 498.00-449.998Mi K, P §30,00-439.995MHr ME PLL block diagram X2 to correspond to the 5, 10, 16, 20, 12.6, and 25kHz channel steps. When VHF band signals are received, 189.05 to 193,045MHz (K,P,M), 189.05 to 197.045MHz (E) is generated, and when VHF band sig- nals are transmitted, 144,00 to 147.995MHz (K,P.M), 144,00 to 145,998MIHe (E) is generated. When UHF sub band signals are received, a lock is established at twice the VCO oscillation frequency to produce 379.475 to 391.47MH2 (K.P), 371.475 to 381.47MHz (Me. 144.00~147 996MHe K, PM Y 144.00-145.995MHe © 189.05~193.045MHe K.P. 188,05~191.045MHs E 378.476-301.47 Mite KP 371.475-381-47 Mite ME esr00Fe 2ScuivnG x2 & zemee a Fig. 18 144MHz band | | | wr | ee J PLL block diagram —TM-732A/E BTM-732A/E CIRCUIT DESCRIPTION 1/0 Port Specifications +__75328GC-540-3B9 (LCD ASSY : IC4) 7-com port 70 |Pullup [Back wy] Description Circuit pn ame Poor i “HBicheck 0: Foner nat connected, 1 Power connected PoW/Sck tLe Po2/S01s80_| P80 o| 0 Common microprocessor. Si Pos/svse1 | Pst tLe Comman miccoprocessor. SO PromTo | PENCGK [1] © Encoder clock PHaNTY | PINT! [1 Connect to PSI Przar2_| PeNcoOT [1 | © Encoder date PIgANTS | P_PS r Power switch (non ockngh si P2opToo | P.KeYI2 [I | Band select VHF. P21 pxevis_[ 1 [0 Band select UHF P22/PGL EY Paaeuz | REPO [I | Oo EEPROM, DO. PoQ/LLCDGL | P_$5 ° 5C switching. PovsyNc | PEPDI | O| m EEPROM, DI Pa Perse [0] a EEPROM. Sk Pas pecs [0] m | | G&PAOM, CS Pao co [o} LCD driver stiobe. MSM5285 Pat cock [O| @ LCD diver clock. MISM5265 Paz P.icooT |O| @ LCD diver data._-MSMB265 Pas Ptest [oO] © LCD all on. MSME265 P50 pres [ile Me key 4 P51 Pxev2 [1] @ MR key. 33 Pa pret [i [e VFO key. 82 Ps 1 [Wes Peomkeo | Bxevi7_| 1 O_| CONTSEL Foy. wa Povks! | PKEYIO | 1 | LOW ey. st Pazma2 | PKeYs | 1 | MUTE key: S10 Paskes | P_keve [1 ‘| REV key, S3 ProKRa | P-KEY? [1 | TONE key, 8 PruKas | P_KeYe | 1 | BELL key, 7 Prekes | PKEYS | I O_| Fay. 6 PTAKR? | P_KEYa | 1 O| CALL tay. $5 0 P80 i ‘| Destination input BO. Pai P81 i ‘| Destination input bY Pen P82 i ‘| Destination input ba Pes P83 i ‘© | Destination input b3. | S24/8P0___| P_BLANK | 0 _ [saveri | PLAMP [0 Lamp. 0: ON 1: OFF _ s2ger2 | DIMI | 0 Dimmer, _1.2= 00:01, 01:02 s77er3___| PDIM2 | 0 Dimmer 1.2 = 10:03, 1.1: D4 S20/8P4 ° S29/8P5 © C ss0aP6__| PLEDU | O ‘Gontl cispay LED (VHF, 0: ON, 1: OFF Sover7 | PLEDV | 0 pao display LED (VHF. 0: ON, 1: OFF ‘ANO/ Ves ANT Vss a ‘ANZ PSOw ‘VHF band squelch input ANS, PVOLV VHF bend volume inut ANA, P_SOLU. UHF band squelch input _ ANS, P_VOLU. UHF band volume input 1: Pulled up by software during checking only (0 : Always pulled up by software 4 (© : Aways pulled up by hardware 1: Always pulled down by hardware€ © CIRCUIT DESCRIPTION +_75517GF-029-3B9 (TX-RX UNIT : 1C403) TM-732A/E Port ame | Play Backup Dossition Cie pnnime PvE Pow desk 0; Option, 1 Bask ipo Pousooss0 | P30 [oo Panel miroprocessor Sl Powsiosst [Pst [1 [0 anal micopocessor. SO PINTO | P- i i PUNT | OTST 1 | EFCSS cotton, 0; Tone mate, 1 Tone mismatch 300 PrzmnTz | #.s1D || m| 1] DTW detection C7286 STO). 0:Nosnul detec, Sgaldaeaed| SO Piamo | r.cawoo|-1 i 3 0: Noa 1 Cano! dey PaarrTOO | p.aeeP [0 | Beep ouputpn Beep sound, "L": No beep ou Pal ery [0 |_| | Sit regsterP LL das (UH oy Pear [cas [0 | Sif reste7PL cock UHR, cx Payeu2 | peru | LPL enti UF eu Fao Pes [0 1 [ht repr eae OH eu Pat Peau [0 1 Sit eit enable UHL E52 ex ret [0 i [-CTGSS unt rable comecion check —arGamsaedTsiaomead | CTE P58 psc fo T_[ SCONE. —0:0N.1: OF 7 Pa Baka | 0. © | 1] OTM encoder deta a. LRaDBOBNT a Pa puna | 0|~@ | 1] OTF encoder dia a a P-2|0| © | 1 | OTMF encode: data c a Pi 0| © | 1 | OTF encode: dts cs 0 Pca 0| © | 1 _| OTMF encoder dt fe fst e-ci[0| © | 1 OTMF encoder data fa P52 pa [ole 1 TMF encoder data (C2). R2 Pe £3 [0] © | 1] OTMF encoder data at peakto | P1760 | 0 T1760 tone peu | P-T0Ne [0 1 [Sutton ub peukta | PT0Ne [0 [Stone oxo 2 Peake | PTONE [0 1 svbtone op Prakta | P-ToNe [0 1 [Sven ovut ia PruKas | PTONE [0 1 [subtore out PraKa6 | P"TONE |. TT Subtone ouput it PraKRT | PTONE—[O. Tf Setone out 7 PeaPPO 1 1 [-eonnected to SCK tor dock when dong ‘PRI/SCKI PUP ifeyi ‘Microphone UP. P82/SO1 PPT ifeyi ‘Microphone PTT. east | DOWN [1 |e | 1 | Mieghone DOW, Fo ea Om decoder dia (UCTS a Pat a2 [ | 1] or dear ate 2, a2 Paz faa [om decor cia 3 ae 8 pas [1 [et deco: ct (0, a Pre DIS | O (Lon ewiehing. — 0: Mcophane, 1 = Deesion ap Poi esp [0 [Seer swatting. 0: nena SP for VHF, ternal SP or UF Paz .crosno [0 {Tete Ro switching. 0: UR. 1 VF Pia F.DIMERO | 0 [OTH RO etching, 0; UNF. 1: VHF Pri pwc [0 1 irphone A swing. 0; UH. VRE Pitt ewMuTe | TT Microphone mite. 0: OFF, 1: ON pra P_MUTEEX [0 1 [ert spskar mia of when beep oui 07 OFF, TON [rie P_MUTEIN TO TT intra speaker mat lf when bop op. 0: OFF. 1 ON P20 P.prar wy [O-| © [I] Seep AF mute VHP, _0:0FF, 1:0 Piz P.pPaFMU [Oe || | Beep AF mite UH) —0 :OFF 1: ON {4 Pulled up by software during checking only (2 Always pulled up by software (©: Always pulled up by Fardware 1 Always pulled down by hardware 5TM-732A/E 16 CIRCUIT DESCRIPTION +_75517GF-029-3B9 (TX-RX UNIT : 1C403) iccom port_| Port name_[H0 [Pi Dessrnton Gia pin name Pra PaPMUN | 0] © | 1 | Boopmute WAN. —0:OFF,1:0N Pras P-pPMUTU[ O[ © | 1 | Beep mute WHA. 0; OFF. 1:0N P80 P-VOLEN [0 |e | 1] Geen volume arable, LHF, W: VHF erat P-ROMUTE || @ | 1] RO mute, 0: Tensmiesn with repair, 17ON Pra FapsWw_ [Oe | 1 | Powersvich, 0: Power OFF, 1: Power ON 8 P13 PLES2V | @ | 1 | Shift register 2 enable (VHF). _ ESv2 Piao BLES [O |e | I~] shift reitor1 enabie VHF est Pat PLEPV ole 1 PLL enable (VHFl. Z EPV Pree PACK’ [0] @ | 1 | Shift registorPtlecroni volime/STCSS dock VHF, ow | Pas PDIV[0| © | 1 | Shi registoPL Electronic vohme/CTCSS dat WHF. “ow avo sv ‘VF band Stor input suv | ANT PasMu | I 'UHF band S-mater nut 7 TSM AN? p_upaN [1 UP, CALL, VFO : 7 ANS PLONAN | 1 DOWN, MR. RF _ aN Hs = = é PISYANE: Tse Pisaane | PSC ——11 SCVAF pat. OF BURY, 1: CLOSE = Prsyan? —[Pscu [1 SC UAFinput 0 BUSY, 1 CLOSE ‘4: Pulled up by software during checking only (© : Always puled up by software + Shift register BU4O94BF (TX-RX UNIT (© : Always pulled up by hardware 1 Always pulled down by hardware IC8) : VHF ee eee = as a2 | 6 | ‘0; MID, LOW power, 1: Hi power HL SH 2 aN a 04 7 _ ‘See next page table 1. 7k 05 14 ___ |__| See next page table 1. 12k os [13 See next page table 1 8 ee ee eee erenal 6 + Shift register BU4094BF (TX-RX UNIT : 1C206) : UHF a a ee ee ee = oe 2 z Seto ae i See Renee aan as | 13 | PO_BoR ‘See next page table | mr gies eee =| @ Note that logics negative. (Reversed when datas output Enable : ES1 UM Data = P21 (4 pin) Clock = P22 143 pin) 30 (4 sindTM-732A/E CIRCUIT DESCRIPTION +_ Relationship between frequencies and Q4, 05, Q6, and Q7 (Table 1) Band ‘abies Frequency (MH | 118 | 2a ‘| ta0- | a00- | a0 Boo- | 8 KP 123995 | 12009 | 172999 | 452996 |_aa7.s05 90990 | 73998 Frequency (WHat a10- : MMa.Ma.E.€2 429.995 a v T c FAN FAN| FAN | [os U H L L H H L co K H H L H L H a7 s Si = = H H a8 t a H L Hl fie w505_|a505 | a.05 | e505 | 90526 _| Ba.828 iF ait U u u L L L Uxu +_ PLLMS6760FP (TX-RX UNIT : IC9, 207 internal IC) Band “aaa ovine Frequeney | 118-129.905 | 130-173.005 | 400-469.595 | 410-460006 | G00-a70.900 | sdd-o0aa0 | 1a6-17a098 swt t 0: Reception t 1: Reception i H 7 a) 1 :Transmission 1 Transmission swe T [os Transmission] H q a T 0 1: Rocopton +_ Shift register BUAO94BF (TX-RX UNIT : 1C5) : VHF squelch Teg port [Pin No Por data name | Save Function Remarks ar [4 | PO.save SOLA G2_|_s_| Po.sava SOL bts ‘a3 | 6 _| Po.save SOL bit ax_|7_[ Po-savi SOL BitT ‘0514 | Po-savo SOL Bit. (05 13._| PO_AMWeN a7 [2 [Po 5 ‘oa 11] Po = Enable :€52 VHF = P33 65 pin) Data = P1436 pin) Clock = 142 62 ain +_ Shift register BU4O94BF (TX-RX UNIT : 1C206) : UHF squelch ‘Sieg por [Pin No, Pardats nano | Save [Back up] Function Remarks | ar |__| Pp_saue SOL BIA ozs | Po-saus SOL bit ‘a3 |—6 | Po-sau SOLbit2. ‘as |—7_[Po-saut SOL Eit1 ‘a5 | 14 | Po-savo SOL Bt. ‘a8 [ 13 [PO aane ar [12 [Po = ‘as [13_[ Po. = noble E52 UHF = Pat (40 pin) Date = P21 (a pn) Clock = P22 (4 pind WTM-732A/E SEMICONDUCTOR DATA Final Module : M57788MR (TX-RX Unit 1C501) + Equivalent circuit + Electrical characteristics Tem |Symbal | TP) | | Fequenay 7 ‘Output power | Po 25 Tea ecieney [aT | 28 ad spurious 25 ‘ard spuraus | | “25 Final Module : S-AV17 (TX-RX Unit 1C502) + Equivalent circuit + Terminal connection ier 1: Input 2 : First stage power supply 3 : Drive stage power supply 44 Final stage power supply 5 : Output 8 Fin (GND) + Terminal connection | ] EP ere ica waa ~ Te8 adnan Teno ae te211 BV AVR oo [cree Ti eee im ier So Ge Deepa ~ Tot, EXE Wer See Gre Deseo Taos Elcrone fig shana VAF bond Lol cane: UF band ies? evan 1408, iC403, Serial data inverter cto e411 | tow eqn oo RE Br-b8 8 or oe Fevereow even 8 ——HWetage correction B10. ~ | Heterodyne switch Transmit/receive switch on Fave eo foe APC wipers comsonaTa — 13,014 ‘Antenne selection switch a rs, b16 | Power deacon an 7 D201 * RF switch - _ ao2 Reverse-flow prevention 24TM-732A/E © DESCRIPTION OF COMPONENTS © et Ne Uee/Fanaion ‘Gparation/Condiion ompaty 3208 ieetinker —— = 0204, 0205 | Heterodyne eich (0206, 0207 Reverse-flow prevention a0 etree etch batt APC tempersturecomparsaon baa Revere prevention 0213, B24 | Antenna selection sich (216, D216 | Power detection Ba? Revere power connesion prevention ‘Daot, Daz Reverse-flow prevention ~ _ toa acl detection ioe eset detection 40s Revere low revnion Foo Microprocessor protection © ‘D407 Reverse-low prevention © @ . © ¢ 2TM-732A/E 26 MODIFICATION Cloning Function + Wired cloning (Modification not required) Cloning cable Operation 1. Write memory data into the master transceiver. 2. Switch the power off, hold down the F and MHz keys, and switch the power on again. ‘The fre- quency display shows "CLone 3, Set the slave transosiver to clone mode in the same way. 4. Connect the microphone jacks of the two transceiv- crs with a cloning cable 5. Pross the CALL key on the master transceiver. The ‘ON AIR® indicator lights, and cloning starts. When data output ends, a beep sounds, and "End! is dis- played, When the writing of all channel data fin- ishes, a beep sounds, and *End’ is displayed. Note: Cloning is possible only between TM-732s. Memery channel modes, the number of chan- nels for each band, and all memory channel data are cloned, + Cloning with transceiver (DTMF} (Modification required) Operation 1, Write data into the master transceiver, and specify the transmit band and transmit frequency. 2, Switch the power off, hold down the CALL and BELL keys, and switch the power on again. Clone receive mode is entered, and ‘Lone is displayed on the frequency display for the band other than the transmit band. 3, Set the receive frequency of the slave transceiver to the transmit frequency of the master transceiver, hold down the CALL and BELL keys, and switch the power on 4, Press the PTT key on the master transceiver. The power goes low automatically and transmission starts. (The remaining data is displayed on the sig- nakstrength meter display.) “ 5. When all the data has been output, a beep sounds, and "End! is displayed. 6. When all the data has been written into the slave transceiver, a beep sounds, and "End! is displayed. Nota : If the signal breaks during reception, a beep sounds, and ‘Err is displayed.1@ '@ i@ TM-732A/E PARTS LIST CAPACITORS co 45 TH 1H 220 J ‘cca jjColr* “Capacitor value 123 4 58 010 = 19 220F 1 = Type «.- corsmig, electrolytic, ete. 100 = 109F Rae 2 = Shape... found, sauars, ect. 101 = 100pF Ae 3= Temp. coefficient 102 = 10009F = 0.001HF Sraaates 103 = 0.01nF + Temperature coetficiont ratwors] Cc] t [P| ATS [1] 0) fw] @ [uw Ts [eK]. Color? | Black | Red [Orange| Yalow | Green | five [Viole | | pomvrc | #30 | x60 | 2120 | #250 | #600 pomv’c | 0 | -0 | ~160 | -220 | -330 | -470 | -750 | Example : CCASTH = -470% 6Oopmi"C Tolerance Loss than 1096 [code] C [DO [G]¥]K[m[x]2]P No code (code] 8 [CT DIF] (6) |2028[205] #2 | 26 [#10 | #20 | +40 | +80 | +100] Moro then 10,F~10~+60| [oF [20.4 [e026|405) a1 | a2 -20 | -20 | -0 |Lossthan_4.2uF ~10 ~ +75 + Voltage rating aawod] ATS ]O]O]TE]TFLSG|H] J] «]V . ist word _ o 70 [126 16 [20 [26 |316| 40 | 60 | 63 | 80 | - 1 10 [126] 16 | 20 | 26 [31.6] 40 | 50 | 63 | a0 | 38 [2 700 | 128 | 160 | 200 | 260 | 316 | 400 | 500 | 630 | 600 | - 3 "1900 [1260] 1600 [2000 [2600 [3160 | 4000 15000 6200) 8000) — except dimension) Dimension (chip) (Cl, RH, Ws, SL 0 CK BEE IN OZ ft al oreo ot 7 (Crioh (8, FP RESISTORS + Chip resistor (Carbon) @ MB WER 2 mL 1294567 (chip) (6,91 + Carbon resistor (Normal type) (% BD 44 BB 20 om J 123946567 ‘Type ... ceramic, eloctolysc, ete. 6 = Voltage rating 6 = Valve 7 = Tolerance Zp + Dimension (Chip capacitor) Dimension code | L Ww 7 Empty | 86405 | 50+ 08 | Loss than 20 E 32402 | 16402 |Loss than 1.25 F 20403 [1.25 4 0.2] Less than 1.28 + Dimension (Chip resistor) Dimension code [_L. W__| 1 [Wattage E a2e02|t6s02 087) 28 F 20203 [1254 02/045 | 2A Rating wattage (Cod |Wiettage [Coda | Wattage [Code | Wattage] [2a | wow | 2 | waw | 3a | iw 28 | vew [2H | tw | 30 | aw 2c | vew. 2