HYT TM-800 Service Manual
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HYT TM-800 Service Manual

HYT TM-800 Service Manual

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CONTENTS
General........................................................................................................1
Radio Overview..............................................................................................2
Software Specification....................................................................................5
Circuit Description........................................................................................77
Semiconductor Data.....................................................................................82
Component Description................................................................................89
Part List 1....................................................................................................90
Exploded View............................................................................................106
Part List 2...................................................................................................107
Disassembly and Reassembly for Repair........................................................108
Remote Kit Installation (Optional)..................................................................111
Packing......................................................................................................113
Adjustment.................................................................................................114
Adjustment Description...............................................................................121
Terminal Function.......................................................................................127
Display Unit................................................................................................131
Tx-Rx Unit..................................................................................................135
VCO..........................................................................................................139
Schematic Diagram.....................................................................................141
Block Diagram...........................................................................................146
Specifications...........................................................................................147

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  • Page 1: Table Of Contents

    CONTENTS General…………………………………………………………………………………………..1 Radio Overview………………………………………………………………………….………2 Software Specification…………………………………………………………………………5 Circuit Description………………………………………………..…………………………..77 Semiconductor Data………………………………………………………………………….82 Component Description…………………………………………..…………………………89 Part List 1…………………………………………………………………………….…………90 Exploded View…………………………………………………………………..……………106 Part List 2…………………………………………………………………………..………….107 Disassembly and Reassembly for Repair………………………………………………..108 Remote Kit Installation (Optional)…………………………………………………….…..111 Packing……………………………………………………………...…………………………113 Adjustment……………………………………………………………………...…………….114 Adjustment Description……………………………………………………………….……121 Terminal Function……………………………………………………………………………127 Display Unit…………………………………………………………………………………...131 Tx-Rx Unit……………………………………………………………………………………..135 VCO…………………………………………………………………………………………….139 Schematic Diagram………………………………………………………………………….141 Block Diagram…………………………………………………………………………….…146 Specifications…………………………………………………………….…………………147...

  • Page 2: General

    TM-800 SERVICE MANUAL General Manual Scope This manual is intended for use by experienced technicians familiar with similar types of communication equipment. It contains all service information required for the equipment and is current as of the publication date. Precautions Safety Standards ●...

  • Page 3: Radio Overview

    TM-800 SERVICE MANUAL Radio Overview Front Panel View ① Power Press the power button to switch the radio on/off. ② Selector Knob Volume Up/Down, Channel Up/Down, Zone Up/Down features can be programmed to this knob (Set by your dealer). Turn the knob clockwise to adjust upwards and counter-clockwise to adjust downwards.
  • Page 4 TM-800 SERVICE MANUAL Microphone LCD Display Indicator Description 1. Display zone / channel number. 2. Display zone / channel label (set by your dealer, up to 12 alphanumeric characters). 3. Display channel Frequency 4. Display the preprogrammed function 1. Display zone / channel number.
  • Page 5 ① Antenna Connector Used to connect external antenna. ② Power input Connector Adopt HYT-authorized DC power cable and 13.6 V input AC power. ③ Speaker Jack Used to connect external speaker and only available for the plug of 3.5 mm.

  • Page 6: Software Specification

    TM-800 SERVICE MANUAL Software Specification Radio Modes 1. Frame of Radio Modes Conventional Mode User Mode User Set Mode Firmware Download PC Mode Clone Mode Wired Clone Mode Wireless Clone Mode Dealer Mode Channel Set Mode Zone Information Mode Function Set Mode...
  • Page 7 TM-800 SERVICE MANUAL 2. Keypad Entry for Mode Startup Display/Sub MODE Main Menu Operation Remarks Menu Conventional Turn on the power to enter ------------------------- Mode Conventional Mode Function Set USER Refer to Appendix 1 “Character PowerOn Text MODE Input” While holding down [PF1]...
  • Page 8 TM-800 SERVICE MANUAL TEST & Test Mode ---------------------------- While holding down [PF2] ADJUST ADJUST MODE ---------------------------- key, turn on the power MODE Model Set Mode ---------------------------- While holding down [PF3] Firmware Version Display Mode ---------------------------- key, turn on the power...
  • Page 9 TM-800 SERVICE MANUAL Function Set Select submenu “Function Set”, then press [PF6] to enter Function Set Mode. Function Name Settings Display Remarks Home Off Home Off Home 1 On Home 1 On Home 2 On Home 2 On Home Channel...
  • Page 10 TM-800 SERVICE MANUAL UST Code Select submenu “UST Code”, press [PF6] to enter UST Code Mode. Function Name Settings Display Remarks 1-32 UST Code No. UST 32 ASCII CODE Name UST Code Name -------- No input CTCSS CTCSS 67.0 (EIA standard) 67.0-254.1Hz...
  • Page 11 TM-800 SERVICE MANUAL CTCSS CTCSS 67.0 (EIA standard) 67.0-254.1Hz CTCSS 254.1 CTCSS CTCSS 67.0* (0.1Hz step) 67.0-254.1Hz CTCSS 254.1* CDCSS (standard) CDCSS 023N [PF5]: Off/CTCSS/CDCSS TX Signalling 023-754 CDCSS 754N [PF4]: standard/step mode [PF3]: CDCSS/ reverse CDCSS CDCSS (1step) CDCSS 000N*...
  • Page 12 TM-800 SERVICE MANUAL Key Assignment Select submenu “Key Assign”, press [PF6] to program the programmable function key PF1-PF6. Settings Display Remarks None PF1 Off VOL Up Volume up PF1 VOL Up VOL Down Volume down PF1 VOL Down CH Up...
  • Page 13 TM-800 SERVICE MANUAL Scan Scan PF1 Scan Add/Del in non-scan mode Add/Del Nuisance channel temp.Del PF1 Add/Del Priority ch temp. del Reverse Reverse frequency PF1 Reverse Talk Around Talkaround PF1 TA SEL SQL Select SQL PF1 SelSQL Home CH Home channel...
  • Page 14 TM-800 SERVICE MANUAL None PF2 Off VOL Up Volume up PF2 VOL Up VOL Down Volume down PF2 VOL Down CH Up Channel up PF2 CH Up CH Down Channel down PF2 CH Down Zone Up Zone up PF2 Zone Up...
  • Page 15 TM-800 SERVICE MANUAL Reverse Reverse frequency PF2 Reverse Talk Around Talkaround PF2 TA Sel SQL Select SQL PF2 SelSQL Home CH Home channel PF2 HomeCH Public Address Public address PF2 PA Horn Alert Horn alert PF2 Horn Alert LCD BackLight...
  • Page 16 TM-800 SERVICE MANUAL MONI A: Moni A PF3 MoniA Monitor Unmute-Momentary MONI B: Moni B PF3 MoniB Monitor Unmute-Toggle MONI C: Moni C PF3 MoniC Carrier Squelch-Momentary MONI D: Moni D PF3 MoniD Carrier Squelch-Toggle Display Label Display channel label...
  • Page 17 TM-800 SERVICE MANUAL Scramble Scrambler PF3 Scramble Compander Compander PF3 Compande AUX A AUXA port output control PF3 AUX A [PF3] AUX B AUXB port output control PF3 AUX B Send GPS Send GPS PF3 Send GPS Emergency Call Emergency call...
  • Page 18 TM-800 SERVICE MANUAL Ch No./ch label/zone No./zone Display Mode label/RX Freq. PF4 DMode User Selectable Tone Tone 01-32(CTCSS/CDCSS) PF4 UserTone Sel 2Tone Select 2-Tone encode PF4 Sel2Tone Sel 5Tone Select 5-Tone encode PF4 Sel5Tone Tx Power Switch TX power PF4 TxPower...
  • Page 19 TM-800 SERVICE MANUAL None PF5 Off VOL Up Volume up PF5 VOL Up VOL Down Volume down PF5 VOL Down CH Up Channel up PF5 CH Up CH Down Channel down PF5 CH Down Zone Up Zone up PF5 Zone Up...
  • Page 20 TM-800 SERVICE MANUAL Reverse Reverse frequency PF5 Reverse Talk Around Talkaround PF5 TA Sel SQL Select SQL PF5 SelSQL Home CH Home channel PF5 HomeCH Public Address Public address PF5 PA Horn Alert Horn alert PF5 Horn Alert LCD BackLight...
  • Page 21 TM-800 SERVICE MANUAL MONI A: Moni A PF6 MoniA Monitor Unmute-Momentary MONI B: Moni B PF6 MoniB Monitor Unmute-Toggle MONI C: Moni C PF6 MoniC Carrier Squelch-Momentary MONI D: Moni D PF6 MoniD Carrier Squelch-Toggle Display Label PF6 DLabel Display channel label...
  • Page 22 TM-800 SERVICE MANUAL Scramble PF6 Scramble Scrambler Compander Compander PF6 Compande AUX A AUXA port output control PF6 AUX A [PF6] AUX B AUXB port output control PF6 AUX B Send GPS Send GPS PF6 Send GPS Emergency Call PF6 Emergency Emergency call...
  • Page 23 TM-800 SERVICE MANUAL 5. Firmware Version Display Mode Turn the power on while holding down [PF3] to enter Firmware Version Display Mode. Firmware version and Firmware checksum will be displayed on the LCD. Release [PF3] to enter User Mode. 6. PC Mode Connect the radio with a PC by programming cable.
  • Page 24 TM-800 SERVICE MANUAL Press [PF6] to return to Clone Mode. “CLONE” appears on the source radio. Repeat the above steps to continue wired cloning. Note: Only the same models can be cloned together. Wireless Clone Mode (1) Turn on the source radio while holding down [PF5] simultaneously, the radio enters Clone Mode with “CLONE”...
  • Page 25 TM-800 SERVICE MANUAL 8. Dealer Mode (1) Turn the power on while holding down [PF6], the radio enters Dealer Mode after inputting correct data password (if Data Password is set). The first mode option that is activated is displayed. When all mode options are prohibited, the radio enters Mode Information Mode after a correct mode-info password (if mode-info Password is set) is entered.
  • Page 26 TM-800 SERVICE MANUAL Dealer Mode 1: Channel Set Select menu “Channel Set”, then press [PF6] to enter Channel Set Mode. Function Name Settings Display Remarks Channel 1-256 Selector Knob: change a Step 1 channel or zone (default: ch) Zone [PF5]: toggle between channel...
  • Page 27 TM-800 SERVICE MANUAL CDCSS (standard) CDCSS 023I 023-754 reverse CDCSS 754I RX Signalling CDCSS (1 step) CDCSS 000I* 000-777 reverse CDCSS 777I* 250 0 T 100.00000 Selector Knob: change at step 500 0 frequency 2.5K/5.0K/6.25K/1M T 400.00000 [PF4]: 2.5K/5.0K/6.25K/1M step TX Frequency 100.0000-550.0000MHz...
  • Page 28 TM-800 SERVICE MANUAL Option Off Default DTMF DTMF 2-Tone 2 Tone Optional Signalling 5-Tone 5 Tone HDC2400 HDC2400 HDC1200 HDC1200 Default BCL (Busy CTCSS/CDCSS CTCSS/CDCSS Channel Lockout) Opt Signalling Opt Signal Carrier Only Carrier Only Default Shift Off Clock Shift...
  • Page 29 TM-800 SERVICE MANUAL Name 12 characters maximum PHILLPOTTS PHILLPOTTS Current input position is 15 Channel Name indicated by cursor Name Refer to Appendix 1 “Character ----------------- ----------------- Input” None Decode None Appears when 2-Tone is 2-Tone Decode selected Decode 1...
  • Page 30 TM-800 SERVICE MANUAL Dealer Mode 2: Zone Information Select menu “Zone Inform”, then press [PF6] to enter Zone Set Mode. Function Display Remarks Setting Selector Knob: select a zone Zone Select Zone 100 Only existing zone can be set. Name...
  • Page 31 TM-800 SERVICE MANUAL Default Reset Off TOT Reset Time 1-15s Reset 1s/1Step Reset 15 Signal OR Default Signalling Control Signal AND Transpond On Default ClearToTranspond TranspondOff Home Default Zone Home Channel 1 1-256 Channel Home Channel 256 Display “END” indicating the end...
  • Page 32 TM-800 SERVICE MANUAL 1. Select submenu “Function 1”, then press [PF6] to enter. Function Setting Display Remarks SQL 0 Step: 1 Squelch Level SQL 5 Default SQL 9 Not decode ctcss/cdtcc during off Not decode hook status, it works as carrier...
  • Page 33 TM-800 SERVICE MANUAL RollOver Off Roll Over Display rolls over as over 12 characters RollOver On Display “END” indicating the end of menu options 2. Select submenu “Function 2”, then press [PF6] to enter. Function Setting Display Remarks LCD ZoneNum...
  • Page 34 TM-800 SERVICE MANUAL Ignition Off Ignition Sense Ignition On 00-59Min 00Hour 00Min Step 1Min Adjust timer: Ignition Sense 00Hour 59Min 0Hour, 0Min-24Hour, 00Min Power off Timer PF5: 1MIN/1HOUR step change 00-24Hour 00Hour 00Min Step 1Hour 24Hour 00Min Display “END” indicating the end of menu option 3.
  • Page 35 TM-800 SERVICE MANUAL VolumeMinOff Volume Min VolumeMin 1 1-64 Step 1 VolumeMin 64 VolumeMin 64 64-127 Volume Max VolumeMin 127 Step 1 Display “END” indicating the end of menu option 4. Select submenu “Alert Tone”, then press [PF6] to enter.
  • Page 36 TM-800 SERVICE MANUAL Dura No.1 0-2550ms Step 10ms Dura Tone Duration No.1 2550ms No. 1-14 Step 1 Dura No.14 0-2550ms Step 10ms Dura No.14 2550ms Display “END” indicating the end of menu option 5. Select submenu “AUX Inform”, then press [PF6] to enter.
  • Page 37 TM-800 SERVICE MANUAL Function Setting Display Remarks AUX 1 None None AUX 1 External PTT Input External PTT AUX 1 Data PTT Input Data PTT AUX 1 Speaker Mute Input Speaker Mute AUX 1 External Monitor Input External Moni AUX 1...
  • Page 38 TM-800 SERVICE MANUAL Function Setting Display Remarks AUX 2 None None AUX 2 External PTT Input External PTT AUX 1 Data PTT Input Data PTT AUX 2 Speaker Mute Input Speaker Mute AUX 2 External Monitor Input External Moni AUX 2...
  • Page 39 TM-800 SERVICE MANUAL Function Setting Display Remarks AUX 3 None None AUX 3 Input External PTT External PTT AUX 1 Input Data PTT Data PTT AUX 3 Input Speaker Mute Speaker Mute AUX 3 Input External Monitor External Moni AUX 3...
  • Page 40 TM-800 SERVICE MANUAL Function Setting Display Remarks AUX 4 None None AUX 4 Input External PTT External PTT AUX 1 Input Data PTT Data PTT AUX 4 Input Speaker Mute Speaker Mute AUX 4 Input External Monitor External Moni AUX 4...
  • Page 41 TM-800 SERVICE MANUAL Function Setting Display Remarks AUX 5 None None AUX 5 Input External PTT External PTT AUX 5 Input Data PTT Data PTT AUX 5 Input Speaker Mute Speaker Mute AUX 5 Input External Monitor External Moni AUX 5...
  • Page 42 TM-800 SERVICE MANUAL Function Setting Display Remarks AUX 6 None None AUX 6 Input External PTT External PTT AUX 1 Input Data PTT Data PTT AUX 6 Input Speaker Mute Speaker Mute AUX 6 Input External Monitor External Moni AUX 6...
  • Page 43 TM-800 SERVICE MANUAL Function Setting Display Remarks AUX 7 None None AUX 7 Input External PTT External PTT AUX 1 Input Data PTT Data PTT AUX 7 Input Speaker Mute Speaker Mute AUX 7 Input External Monitor External Moni AUX 7...
  • Page 44 TM-800 SERVICE MANUAL Dealer Mode 4: Scan Information Select menu “Scan Inform”, then press [PF6] to enter Scan Information Mode. The menu options are shown as follows: Sub Menu Menu Item Scan Set ZoneScanList 1. Select submenu “Scan Set”, then press [PF6] to enter.
  • Page 45 TM-800 SERVICE MANUAL Ch: Off, 1-256 PRICH1 Off Selector Knob: change a channel Priority Channel1 Zone or zone (default CH) [PF5]: channel/zone Channel PRICH1 [PF4]: Priority CH On/Off PRICH2 Off Ch: Off,1-256 Selector Knob: change a channel Priority Channel 2...
  • Page 46 TM-800 SERVICE MANUAL Scan Default Last used (RX) Revert Call Scan Last used (TX) Revert Used Scan Selected Revert SEL Selected + Scan TalkBack SEL TalkBack Revert Channel Scan Priority 1 Revert PRIO1 Priority 1 Scan +TalkBack P1 TalkBack Scan...
  • Page 47 TM-800 SERVICE MANUAL 2. Select submenu “ZoneScan List”, then press [PF6] to enter. Function Setting Display Remarks Selector Knob：select zone 1-256 Select a Zone Zone 100 Only existing zone can be set. [PF6]: enter the second item List Enable Zone Scan List...
  • Page 48 TM-800 SERVICE MANUAL First digit = first digit time + digit time 100ms Default 100ms First Digit Time 500ms 500ms 1000ms 10ms/1Step 1000ms First: Max (first digit time,*and# time) + digit time Not first: * and # time + digit time...
  • Page 49 TM-800 SERVICE MANUAL DTMF D Code DKey D-Code DTMF D Key Assignment Pause1-16s DKeyPause 1 DTMF DkeyPause 16 DTM F Side Tone Off SideTone Off DTMF Side Tone DTM F Side Tone On SideTone On Auto Dial Off AutoDial Off...
  • Page 50 TM-800 SERVICE MANUAL 2. Select submenu "DTMF Decode", then press [PF6] to enter. Function Setting Remarks Display 12345678 12345678 Primary Code ABCDEF12 ABCDEF12 12345678 12345678 Secondary Code ABCDEF12 ABCDEF12 Auto RstTime Off Auto Auto Reset Time RstTime 1S 1-300s Auto...
  • Page 51 TM-800 SERVICE MANUAL 3. Select submenu “AutoDialList”, then press [PF6] to enter. Function Setting Display Remarks 1-32 AutoDial Auto Dial No. Step 1 AutoDial 32 Name ASCII CODE AutoDial Auto Dial Name Name No input ----------- Code It will be scrolled as >=12...
  • Page 52 TM-800 SERVICE MANUAL Dealer Mode 6: 2-Tone Set Select menu “2-Tone Set”, then press [PF6] to enter 2-Tone Set Mode. The menu options are shown as follows: Sub Menu Menu Item 2-Tone Encode 2-Tone Decode 2-Tone Option Select submenu “2-Tone Encode”, then press [PF6] to enter.
  • Page 53 TM-800 SERVICE MANUAL Dur. Long: Off Dur. Long A Duration Long: 0.5S 0.5-10.0s Dur. Long: 10.0S Display “END” indicating the end of menu options Select submenu “2-Tone Decode”, then press [PF6] to enter. Function Setting Display Remarks 2-Tone 1 2-Tone Code No.
  • Page 54 TM-800 SERVICE MANUAL Decode2: None None Decode2: A-B Decode2: A-C Decode2: A-D Decode2: B-A Decode2: B-C Decode2: B-D Decode2: C-A Decode 2 Format Decode2: C-B Decode2: C-D Decode2: D-A Decode2: D-B Decode2: D-C Decode2: A Long A Decode2: B Long B...
  • Page 55 TM-800 SERVICE MANUAL None Decode4: None Decode4: A-B Decode4: A-C Decode4: A-D Decode4: B-A Decode4: B-C Decode4: B-D Decode4: C-A Decode 4 Format Decode4: C-B Decode4: C-D Decode4: D-A Decode4: D-B Decode4: D-C Long A Decode4: A Long B Decode4: B...
  • Page 56 TM-800 SERVICE MANUAL None None Alert Alert Call Response 1 Transpond Transpond Alert & Tran Alert & Tran None None Alert Alert Call Response 2 Transpond Transpond Alert & Tran Alert & Tran None None Alert Alert Call Response 3...
  • Page 57 TM-800 SERVICE MANUAL Tone A Tone A Decode Code Decode 2 Decode Code Alert Tone Ref. “Alert Tone” in Function Alert Tone 1 Alert 1-8 Set Mode Alert Tone 8 Tone A Tone A Decode Code Decode 3 Decode Code Alert Tone Ref.
  • Page 58 TM-800 SERVICE MANUAL 3. Select submenu “2-Tone Option”, then press [PF6] to enter. Function Setting Display Remarks Rise 200ms Default Time 200ms Rise 1 2-Tone Tx Rise Time Time 100ms 100-1000ms Rise 50ms/1Step Time 1000ms Tone Off 2 2-Tone Tx Tone...
  • Page 59 TM-800 SERVICE MANUAL 1. Select submenu “Parameter”, then press [PF6] to enter. Select Parameter 1-16 to set 5-Tone parameters. Function Setting Display Remarks Parameter 1 Parameter1-16 5-Tone Parameter Default: Parameter 1 Step 1 Parameter 16 SingleTone 0 SingleTone SigleTone 0-F...
  • Page 60 TM-800 SERVICE MANUAL TxRx TxRx Eurosignal Eurosignal TxRx Natel NATEL TX/RX Address TxRx Standard TxRx MODAT MODAT TxRx CCITT CCITT TxRx USER DEFINED USER DEFINED None None Decode Code 1 Telegram 1 Decode Telegram 1-10 Telegram 10 None None Decode Code 2...
  • Page 61 TM-800 SERVICE MANUAL Select submenu “Encode Teleg”, then press [PF6] to enter. Function Setting Display Remarks EncodeTel 1 5-Tone Encode Telegram Default: EncodeTelegram 1 EncodeTelegram 1-32 Step 1 EncodeTel 32 1stF Disable Disable 1stF RxAdress RxAdress 1stF First Frame Default: Disable...
  • Page 62 TM-800 SERVICE MANUAL Disable Disable Transpond Decode Default: Disable Decode Tel 1 DecodeTel 1-10 Decode Tel 10 Name Refer to Appendix 1 “Character 12345 TelegramName Input” Name ------------ Display “END” indicating the end of menu options 3. Select submenu “EncodeFrame”, then press [PF6] to enter.
  • Page 63 TM-800 SERVICE MANUAL 4. Select submenu “EncodeOption”, then press [PF6] to enter. Function Setting Display Remarks Delay 0ms 0-7000ms 5-Tone Delay 1 Default: 100ms Step 10ms Delay 7000ms 0-7000ms Delay 0ms 5-Tone Delay 2 Default: 300ms Step 10ms Delay 7000ms...
  • Page 64 TM-800 SERVICE MANUAL Display “END” indicating the end of menu options 5. Select submenu “Decode Telegr”, then press [PF6] to enter. Display Function Setting Remarks DecodeTel 1 5Tone Decode Telegram Decode Telegram 1-10 Decode Tel 10 ZVEL1 ZVEL1 ZVEL2 ZVEL2...
  • Page 65 TM-800 SERVICE MANUAL None None Normal Normal Frame 3 Default: None Rx Address Rx Address Single Single Tone Disable Moni Disable Monitor Default: Open Close Moni Close Open Moni Open Disable Stun Disable Stun Stun Enable Revive Stun Revive Stun...
  • Page 66 TM-800 SERVICE MANUAL 6. Select submenu “Decode Option”, then press [PF6] to enter. Function Setting Remarks Display Auto Reset Time Off 5 Tone Auto Auto Reset Time 1-180s ResetTime1 Default: Off Step 1s Auto ResetTime180 Next Decode Delay 0-2550ms NDDT 0ms...
  • Page 67 TM-800 SERVICE MANUAL Dealer Mode 9: Emergency Set Select menu “Emergency Set”, then press [PF6] to enter. Function Setting Remarks Display 1-256 Selector Knob: change a Emergency Zone channel or zone (default ch) Emergency CH 1-256 CH 100. [PF5]: channel/zone...
  • Page 68 TM-800 SERVICE MANUAL Tex t ---------------------- No Text to be Displayed ---------------------- Emergency Tex t Display Text Emergency Max 12 Emergency Mod e Silent Silent Emergency Mode Mod e Audible Audible Ton e 1 Dur. Tone 1 Duration 0-255s Ton e Step 1s 1 Dur.
  • Page 69 TM-800 SERVICE MANUAL 1. Select submenu ‘Stun Set”, then press [PF6] to enter. Function Setting Display Remarks Stun ------------ No encode, disable Stun Disable Stun Stun Encode 0000000 0000000 Stun ~FFFFFFF FFFFFFF Stun TX Inhibit Default TX Inhibit Stun Stun Response...
  • Page 70 TM-800 SERVICE MANUAL Mode ZoneSet Off Zone Information Mode Mode Default ZoneSet On Mode FuncSet Off Function Set Mode Mode Default FuncSet On Mode ScanSet Off Scan Information Mode Mode Default ScanSet On Mode DTMFSet Off DTMF Set Mode Mode...
  • Page 71 TM-800 SERVICE MANUAL Mode WireCloneOff Clone Mode Mode Default WireClone On Mode ModelSel Off Model Set Mode Mode Default ModelSel On Prog Firmware Download FirmWare Off Mode Prog Default FirmWare On Firmware Version Version Off Display Default Version On Display “END” indicating the end of menu options 2.
  • Page 72 TM-800 SERVICE MANUAL In this mode, the channel frequency (center, low, high) can be modified through the programming software. Model RX/TX CH1 ( C) CH 2 ( L ) CH 3 ( H ) CH 4 CH 5 CH 6...
  • Page 73 TM-800 SERVICE MANUAL 2. In Test Mode, the following functions can be accomplished by key pressing. Function Description Volume Up Down Volume down Wide band/Narrow band Squelch Open/Close “ ” icon appears when squelch is opened. Test Mode/ Adjustment Mode...
  • Page 74 TM-800 SERVICE MANUAL In Test Mode, user can press the following key to switch models. Press [PF3] to toggle between Test Mode and Adjustment Mode. ① Press [PF4] to toggle between Adjustment Mode and Model Set Mode ([PF4] is invalid if Model Set Mode is inhibited by your dealer.
  • Page 75 TM-800 SERVICE MANUAL 5. Setting Items （＊＊＊：1-256） Wideband/ Setting Item Frequency Main LCD Sub LCD Description Narrowband Center CDCSS BAL *** 100Hz square wave Wide CDCSS BAL *** 100Hz square wave CDCSS Balance High CDCSS BAL *** 100Hz square wave...
  • Page 76 TM-800 SERVICE MANUAL Center No signalling OpenSQL9 *** SQL 9 No signalling OpenSQL9 *** Wideband High No signalling OpenSQL9 *** SQL 9 Center OpenSQL9 *** No signalling Narrowband SQL Open Center No signalling OpenSQL3 SQL3 No signalling OpenSQL3 Wideband High...
  • Page 77 TM-800 SERVICE MANUAL Model Set Mode Turn power on while holding down [PF2], the radio enters Test Mode. The frequency test channel and signalling test channel are displayed. In Test Mode, press [PF3] to enter Adjustment Mode. In Adjustment Mode, press [PF4] to enter Model Set Mode. “DESTINATION” and the model No.

  • Page 78: Circuit Description

    TM-800 SERVICE MANUAL Circuit Description 1. Frequency Configuration The receiver utilizes double conversion superheterodyne. The first IF is 49.95MHz and the second is 450KHz. The first local oscillator signal is supplied by PLL circuit. The second local oscillator signal (50.4MHz) is generated from the frequency tripling of TCXO (16.8MHz).
  • Page 79 TM-800 SERVICE MANUAL IF Amplifier The first IF signal is amplified by Q125, Q118 and then enters IC119 (TA31136FN). The signal is mixed with the second local oscillator signal (50.4MHz) to create a 450KHz second IF signal. The second IF signal is then fed to a ceramic filter (N: CF101, CF103;...
  • Page 80 TM-800 SERVICE MANUAL 3.2 Driver and Final Power Amplifier Circuit TX-RF signal is outputted from Q703 in VCO circuit and amplified by Q126, Q127 and Q128. The amplified signal is then fed to IC102 (Power Module) and passes through LPF before reaching the antenna terminal.
  • Page 81 TM-800 SERVICE MANUAL 5. Control Circuit Circuit in this section is comprised of CPU, reset IC, power supply controller and flash ROM. 5.1 CPU IC120 (CPU) operates at 9.8304MHz. It controls the data transmission between receive circuit, transmit circuit, control circuit, display circuit and peripheral circuit.
  • Page 82 TM-800 SERVICE MANUAL 6. Display Circuit Display circuit is comprised of CPU (IC503), LCD module, LED and other components. Radio features are programmable by PF1-PF6. Data is displayed on the 12-digit and 4-digit dot matrix LCD in alphanumeric form. Figure 6 Display Circuit...

  • Page 83: Semiconductor Data

    TM-800 SERVICE MANUAL Semiconductor Data 1. Voltage Supply: TA7805F (Display Unit IC501): Providing supply voltage. 2. Voltage Detector: R3111H421C(Display Unit IC502) 2-1.Pin Function Pin No. Name Function Vout Reset. GND. Supply voltage. 3. Display CPU: UPD780112(Display Unit IC503) 3-1.Pin Function Pin No.
  • Page 84 TM-800 SERVICE MANUAL HMBL MIC backlight control signal output. HOOK/RXD0 Hook signal input/ Serial data input. TXD0 PC commands (TXD)/connects to PTT. RLED Red LED output. GLED Green LED output. PTT/connect to TXD0. DNKEY Up key. UPKEY Down key. KEYBL Key backlight.
  • Page 85 TM-800 SERVICE MANUAL 6. Audio processor: AK2346 (TX-RX Unit IC106) 6-1 Pin Function Pin No. Name Function AGNDIN Analog ground input pin. AGND Analog ground output pin. TXIN Transmit audio signal input pin. TXINO TXA1 feedback output pin. LIMLV Limit level adjuster pin.
  • Page 86 TM-800 SERVICE MANUAL 7. DTMF Receiver: LC73872M (TX-RX Unit IC122) 7-1 Pin Function Pin No. Name Description INPUT Signal input. No connection. The IC goes to lower power mode when this pin is pulled high. OSCO Oscillator output. OSCI Oscillator input.
  • Page 87 TM-800 SERVICE MANUAL 9. Power amplifier: TDA8561Q (TX-RX Unit IC126) 9-1 Pin Function Pin No. Name Description -INV1 Non-inverting input 1. GND(S) Signal ground. INV2 Inverting input 2. Supply voltage ripple rejection. Supply voltage. OUT1 Output 1. GND1 Power ground 1.
  • Page 88 TM-800 SERVICE MANUAL 15. CPU: M16C (Tx-Rx Unit IC120) 15-1 Pin Funcion PIN No. PORT PIN NAME DESCRIPTION P94/DA1 2TN/5TN 2-tone/5-tone decode pulse input P93/DA0 DTMF DTMF/2Tone/5Tone/BEEP output SB power switch control. H: off L: on AFDIO AK2346 DATA I/O (SDAT)
  • Page 89 TM-800 SERVICE MANUAL NC (left floating) HOLD NC (left floating) NC (left floating) NC (left floating) Read (for expansion) NC (left floating) Write (for expansion) Horn alert control On: H SHIFT Clock frequency shift On: H W/N switch W: L...

  • Page 90: Component Description

    TM-800 SERVICE MANUAL Component Description 1. TX-RX Unit Ref. No. Part Name Type Description IC102 Power module Power module IC103 AT29C02-90T1 Flash ROM IC104 NJM2904V Single-supply dual operational amplifier IC105 AT2408N12.5S EEPROM IC106 AK2346 Audio processor IC107 TA75W558FU Dual operational amplifier...

  • Page 91: Part List 1

    TM-800 SERVICE MANUAL Part List 1 Tx-RxUnit Ref. No. Material No. Description Address Ref. No. Material No. Description Address Resistor 0402 　 100 Ω 　 J Resistor 0603 　 1K Ω 　 J R168 01021012 R178 01031022 Resistor 0402 　 100 Ω 　 J Resistor 0603 　...
  • Page 92 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address Ref. No. Material No. Description Address Resistor 0603 　 10K Ω 　 J Resistor 0603 　 150K Ω 　 J R371 01031032 R347 01031542 Resistor 0603 　 10K Ω 　 J Resistor 0603 　...
  • Page 93 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address Ref. No. Material No. Description Address Resistor 0603 　 270 Ω 　 J Resistor 0603 　 4.7K Ω 　 J R309 01032712 T10K R604 01034722 Resistor 0603 　 270 Ω 　 J Resistor 0603 　...
  • Page 94 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address Ref. No. Material No. Description Address Resistor 0603 　 56 Ω 　 J Resistor array YC122 0402*2 100 Ω 5% R223 01035602 CP101 012D101J Resistor 0603 　 560 Ω 　 J Resistor array YC122 0402*2 100 Ω...
  • Page 95 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address Ref. No. Material No. Description Address Capacitor 0603 　 100P 　 J 　 50V Capacitor 0603 　 1000P 　 K 　 50V C205 02031012 B10F C144 02031023 Capacitor 0603 　 100P 　 J 　 50V Capacitor 0603 　...
  • Page 96 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address Ref. No. Material No. Description Address Capacitor 0603 　 1000P 　 K 　 50V Capacitor 0603 　 0.01uF 　 K 　 25V C304 02031023 C326 02031033 Capacitor 0603 　 1000P 　 K 　 50V Capacitor 0603 　...
  • Page 97 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address Ref. No. Material No. Description Address Capacitor 0603 　 1uF 　 K 　 10V Capacitor 0603 　 27P 　 J 　 50V C102 02031053 C224 02032702 Capacitor 0603 　 1uF 　 K 　 10V Capacitor 0603 　...
  • Page 98 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address Ref. No. Material No. Description Address Inductor 　 1uH 　 NL252018T-1R0J Diode 　 1SS355 (TE17) L141 03081020 D132 04003550 Inductor 　 10uH 　 NL252018T-100J Diode 　 1SS355 (TE17) L114 03081030 D118 04003550 Inductor 　...
  • Page 99 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address Ref. No. Material No. Description Address Triode 　 2SC3357-T1 ● IC 　 TC4013BF Q601 05023357 IC127 07401300 Triode 　 2SC4116(GR) Q123 05024116 IC109 074558M0 IC NJM4558M Triode 　 2SC4116(GR) Q116 05024116...
  • Page 100 Electrolytic capacitor 　 100uF 　 25V C407 C2251070 IC 　 TA7808S IC115 07TA7808 Amplification module 　 RA60H1317M IC102 07H1317M XF104 1614004A TM-800 Crystal silicagel cushion XF102 1614004A TM-800 Crystal silicagel cushion XF103 1614004A TM-800 Crystal silicagel cushion XF101 1614004A TM-800 Crystal silicagel cushion 18000107...
  • Page 101 TM-800 SERVICE MANUAL VCO Unit Ref. No. Material No. Description Address R706 01030002 Resistor 0603 0Ω R705 01030002 Resistor 0603 0Ω R707 01030002 Resistor 0603 0Ω R713 01031012 Resistor 0603 100Ω J R714 01031012 Resistor 0603 100Ω J R702 01031022 Resistor 0603 1KΩ...
  • Page 102 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address C721 02031012 Capacitor 0603 100P J 50V C701 02036802 Capacitor 0603 68P J 50V C715 0203R75B Capacitor 0603 0.75P B 50V TC702 022Z06A0 Variable Capacitor TZVY02Z060A110.6P TC701 022Z06A0 Variable Capacitor TZVY02Z060A110.6P...
  • Page 103 TM-800 SERVICE MANUAL Display Unit Ref. No. Material No. Description Address X501 10198304 Crystal 9.8304MHz-NX804SGB(5*8) F501 0102A30V Fuse 1812 0.2A(MINISMDC020-2) R505 01030002 Resistor 0603 0Ω R506 01030002 Resistor 0603 0Ω R511 01030002 Resistor 0603 0Ω R522 01030002 Resistor 0603 0Ω...
  • Page 104 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address R556 01034732 Resistor 0603 47KΩ J R557 01034732 Resistor 0603 47KΩ J R514 01034732 Resistor 0603 47KΩ J R515 01034732 Resistor 0603 47KΩ J R524 01034732 Resistor 0603 47KΩ J R525 01034732 Resistor 0603 47KΩ...
  • Page 105 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address C502 02031033 Capacitor 0603 0.01uF K 25V C509 02031033 Capacitor 0603 0.01uF K 25V C510 02031033 Capacitor 0603 0.01uF K 25V C503 02031053 Capacitor 0603 1uF K 10V C505 02032202 Capacitor 0603 22P J 50V...
  • Page 106 TM-800 SERVICE MANUAL Ref. No. Material No. Description Address IC501 07780500 IC TA7805F J501 08140000 MIC jack RJ45 J503 08140080 8P SMT jack FFC (0.5mm) J504 08140111 11P SMT jack FFC (1.5mm) J505 08141020 2P couple jack K509 1914000A Waveband switch EC11EBB24C(F1371793M)

  • Page 107: Exploded View

    TM-800 SERVICE MANUAL Exploded View...

  • Page 108: Part List 2

    TM-800 SERVICE MANUAL Part List 2 Part No. Part Description Material Remark 1514001A Rear cover PC+ABS (C1200HF) 1714026A Absorbing sponge 1414001A Shield cover ADC12 Phosphor Bronze 1414013A Shield sheet copper C5210P) 1614000A Seal gasket (shield) Silica gel 1414011A Clip (power module cooler)

  • Page 109: Disassembly And Reassembly For Repair

    TM-800 SERVICE MANUAL Disassembly and Reassembly for Repair Disassembly 1. Power off the transceiver; disconnect the power cable and screw out the antenna connector. 2. Lift the tabs on the bottom of the transceiver, and then remove the panel from the transceiver.
  • Page 110 TM-800 SERVICE MANUAL 6. Loosen the screw that binds the power cable (black) to the PCB board; loosen the screws on the external board and d15-pin plug; remove the external board and the waterproof packing. 7. Loosen the screw on the power amplification module; loosen by welding the connector that connects power amplification module to the main PCB, and then pull out the module.
  • Page 111 TM-800 SERVICE MANUAL Screw on the four adjustment screws (each with one shrapnel and one shim). Plug the connector (Remote SP MIC) to the jack (Remote SP MIC); when the remote SP MIC is not in use, hang it on the bracket (Remote SP MIC).

  • Page 112: Remote Kit Installation (Optional)

    TM-800 SERVICE MANUAL Remote Kit Installation (Optional) The remote kit is optional, the steps of installation as follow: 1. Lift the tab on the bottom of transceiver, and then pull the panel away from the transceiver. 2. Remove the connector that binds the display unit to the TX-RX unit.
  • Page 113 TM-800 SERVICE MANUAL 7. For the first three steps of the rear panel installation, please refer to step 3, 4 and 5. 8. Plug the connector from the front panel into the socket, as shown following. Affix the ground wire (from the rear panel) to the chassis with the supplied screw.

  • Page 114: Packing

    TM-800 SERVICE MANUAL Packing...

  • Page 115: Adjustment

    TM-800 SERVICE MANUAL Adjustment 1. Key Functions 1-1 Front Panel 1. Power switch. 2. Selector Knob. 3. LCD Display. 4. Down key. 5. Up key. 6. Indicator light. 7. Microphone Jack. 8. PF1 key. 9. PF2 key. 10. PF3 key.
  • Page 116 TM-800 SERVICE MANUAL When the Function is On (press PF4, ▽ appears) Controls Function Description Compander on/off. When compander opens, ▼ appears. When the remove frequency is on, “A” appears. Beat shift on/off. MSK 1200/2400bps changeover. When MSK is 2400bps，“...
  • Page 117 TM-800 SERVICE MANUAL 2-2. Test Frequency Channel (MHz) In this mode, the test channel frequency (center(C)、low(L)、high(H) frequency) can be modified through the programming software. Model RX/TX 1 ( C ) 2 ( L ) 3 ( H ) RX(MHz) 155.15 136.15...
  • Page 118 TM-800 SERVICE MANUAL 3-2. Tuning Item and Display Refer to “5. Setting Items” in “Test Mode”. 3-3. Flow Chart : Use the [PF4] and [PF5] keys. : Use the [PF6] key. 3. Use the [SELECTOR] knob to set an adjustment value (1 to 256) for each adjustment item.
  • Page 119 TM-800 SERVICE MANUAL [PF6] [PF2]+Power ON CDCSS deviation(Center) CDCSS deviation [PF3] [PF6] Frequency Panel test mode CDCSS deviation(Low) [PF6] [PF6] [PF6] CDCSS deviation(High) TX high power (Center) power [PF6] [PF6] CDCSS deviation(narrow TX high power (Low) Center) [PF6] [PF6] TX high power (High)
  • Page 120 TM-800 SERVICE MANUAL 4. Test Equipment Required for Alignment Test Equipment Method Major Specifications Standard Signal Frequency 136 to 174 MHz Generator (SSG) Modulation Frequency modulation and external modulation Output 0.1uV to greater than 1mV Power Meter Input Impedance 50Ω...
  • Page 121 TM-800 SERVICE MANUAL 4-2. Test Cable for Microphone input The following test cable is recommended. 5. Warnings When Removing or Installing the Shield Cover When handling with the shielding cover, do not damage the components on the TX-RX unit. When installing the shielding cover, insert the cover from the rear side.

  • Page 122: Adjustment Description

    TM-800 SERVICE MANUAL Adjustment Description The radio can be adjusted by PC programming software or by manual adjustment. Manual adjustment procedure of TM800 is as follows. (Refer to “Test Mode” and “Adjustment mode” in the section Radio Modes.) Instrument: Radio Communication Test Set...
  • Page 123 TM-800 SERVICE MANUAL Model RX/TX 1 ( FC ) 2 (F L ) 3 (FH ) 155.15 136.15 145.55 155.00 155.40 RX(MHz) 173.85 164.55 155.20 （V） 155.00 136.00 174.00 164.50 155.00 155.20 155.40 TX(MHz) 145.50 481.15 450.15 465.55 481.00 481.20 481.40...
  • Page 124 TM-800 SERVICE MANUAL Transmitter Measurement Adjustment Specification Item Condition /Remarks Test Instrument Terminal Part Method Enter adjustment item Radio 4.TX “1”, each Ch Adjust software Communication Adjust to Ch frequency Error <50Hz Frequency corresponds to a settings Test Set specific TX Freq...
  • Page 125 TM-800 SERVICE MANUAL Radio Change Each Ch corresponds Communication CDCSS Check 9.CDCSS to a specific TX Freq, Test Set settings with waveform Balance enter adjustment item FILTER Selector Knob “4” LPF: 300Hz Each Ch corresponds Radio to a specific TX Freq,...
  • Page 126 TM-800 SERVICE MANUAL Receiver Measurement Adjustment Specification Item Condition /Remarks Test Instrument Terminal Part Method Adjust the gain to the Max. value, the Enter adjustment 15. RF Adjust corresponding freq item “10”, each Ch bandpass Scanner ANT . TP1 software...
  • Page 127 TM-800 SERVICE MANUAL Radio Communication Press [PF2] to Test Set Adjust software adjust software Enter adjustment item SSG output: settings at SQL3 settings , open “11”, turn to -120dBm (level 3) 18. SQ Open and SQL9，press the squelch CH (H), CH(C), CH (L) [PF6] to save.

  • Page 128: Terminal Function

    TM-800 SERVICE MANUAL Terminal Function 1. Display Unit Pin No. Name Description J501 (To MIC Jack) MIC backlight control signal output. “H”: On, “L”:Off. Power outputs after power switch (13.6V+15%). Ground. PTT/TXD PTT signal input/ Serial data output. MIC ground.
  • Page 129 TM-800 SERVICE MANUAL 2. TX-RX Unit Pin No. Name Description J101 (To DISPLAY UNIT) MIC ground. MIC signal output. Ground. REST Reset signal input. TXD2 Serial data output. RXD2 Serial data input. Ground. Power switch control signal output. Power input after power switch (13.6V+15%).
  • Page 130 TM-800 SERVICE MANUAL Pin No. Name Description J111 (at the rear panel; to Secondary Development Interface) TXD0 Serial data input. RXD0 Serial data output. MIC2 External MIC signal output. MIC ground. Filtered Audio output. AUX5 Programmable auxiliary port. AUX4 Programmable auxiliary port.
  • Page 131 TM-800 SERVICE MANUAL GND. AUX1 Programmable auxiliary port. AUX3 Programmable auxiliary port. AUX4 Programmable auxiliary port. AUX2 Programmable auxiliary port. DTMFIO DTMF input/output. TXD0 Serial data output. RXD0 Serial data input. J112 (To GPS) TXD1 Serial data output. RXD1 Serial data input.

  • Page 132: Display Unit

    TM-800 Display Unit (Top Overlay) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 133 TM-800 Display Unit (Top Layer) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 134 TM-800 Display Unit (Bottom Overlay) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 135 TM-800 Display Unit (Bottom Layer) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...

  • Page 136: Tx-Rx Unit

    TM-800 Tx-Rx Unit (Top Overlay) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 137 TM-800 Tx-Rx Unit (Top Layer) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 138 TM-800 Tx-Rx Unit (Bottom Overlay) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 139 TM-800 Tx-Rx Unit (Bottom Layer) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...

  • Page 140: Vco

    TM-800 VCO (Top Overlay) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 141 TM-800 VCO (Top Layer) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...

  • Page 142: Schematic Diagram

    TM-800 Schematic Diagram (Display Unit) TM-800 Schematic Diagram (Display Unit) K501 K502 K503 K504 K505 K506 K507 K508 Q501 D511 D507 D506 D505 R545 IC502 R3111H421C 100 0.5W R555 R501 RESET Vout D512 D510 D509 D508 100K C501 2SB1132(Q.R) 0.022U...
  • Page 143 TM-800 Schematic Diagram (TX-RX-PLL) TM-800 Schematic Diagram (Tx-Rx-PLL) C801 R806 R802 1000P 100K Q801 DTC114EE L801 R801 R803 601S R804 100K Q803 100K 2SC4116 Q806 2.7K C813 D801 R805 2SA1832(GR) R807 0.068U 2.7K C812 MA2S111 R814 C805 Q802 IC801 1000P R812 10 4.7U 16V...
  • Page 144 TM-800 Schematic Diagram (TX-RX-BPF) TM-800 Schematic Diagram (Tx-Rx-BPF) L601 R606 L602 R604 4.7K C620 C616 C614 Q601 C606 2SC3357 C609 L603 C608 C601 C607 150P RFOUT RFIN C615 C602 1000P 1000P R602 D603 1SV228 D601 R603 1SV228 D602 1SV228 C619...
  • Page 145 TM-800 Schematic Diagram (Tx-Rx) TM-800 Schematic Diagram (Tx-Rx) VHF: 136MHz ---174MHz J101 J112 J109 J111 MAIN JP EXT1 PLL.SCH PLCK R112 PLDT R113 DATA C203 C107 PLST R114 1000P 100P C300 C116 C106 1000P C207 1000P C204 C118 F101 100P...
  • Page 146 m (Tx-Rx) IC102 Temperature protection POWER MODULE ANTENNA TH101 TEMP PLL.SCH C111 C117 C121 13.2V 100K L102 C156 C160 C164 C304 0.1U 1000P 0.1U 1000P TEST D 601S C151 D124 L131 DATA R161 L129 L132 L138 C251 MA4P1250 Q123 C153 Q128 R135 1000P...

  • Page 147: Block Diagram

    TM-800 Schematic Diagram (VCO) 1SV282 R701 R703 D701 Q701 C703 C704 2SK508NV(K52) L704 R704 1SV282 1000P 1000P C701 C702 100N L701 D704 C706 3.3U C716 C719 R715 R713 220K C711 15P 1000P TC701 C717 Q703 2SC5108(Y) R705 C705 R712 R706...

  • Page 148: Specifications

    TM-800 SERVICE MANUAL Specifications Frequency Range 136-174MHz Number of Channels (Zone) Conventional CH:Max.256 (1 zone×256ch – 256 zones×1ch) Channel Spacing 25、30KHz/12.5、15KHz PLL Step 2.5/5/6.25/7.5 Power Supply 13.6V±15% Duty Cycle Transmit: 20% Operation Temperature -30℃+60℃ Frequency Stability ±2.0ppm Antenna Impedance 50Ω...
  • Page 149 TM-800 SERVICE MANUAL Appendix 1 Entering Characters Entering characters with an optional microphone keypad CHARACTER Number of times key is pressed NUMBER REMARKS Space Each key can generate numeric and character information. Pressing a key will cause the first character of the key’s character cycle to appear on the LCD;...

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