Page 1 Part List 1…………………………………………………………………………….…………91 Troubleshooting Flow Chart…………………………………………………….…………91 Exploded View…………………………………………………………………..……………107 Part List 2…………………………………………………………………………..………….108 Disassembly and Reassembly for Repair………………………………………………..109 Remote Kit Installation (Optional)…………………………………………………….…..112 Packing……………………………………………………………...…………………………114 Adjustment……………………………………………………………………...…………….115 Adjustment Description……………………………………………………………….……122 Terminal Function……………………………………………………………………………128 TM-800 PC Board View……………………………………………………………………...132 TM-800 Schematic Diagram………………………………………………………………….142 TM-800 Block Diagram…………………………………………………………………….…147 Specifications…………………………………………………………….…………………148 Appendix 1 Entering Characters………………………………………………….…………149...
Page 2: Revision History
Revision History Version Date Contents Revised 8130M80000000 September 2005 Initial release 8130M80000010 September 2006 1) Semiconductor data upgrading ( Flash ROM & DTMF Receive) 2) Component description upgrading (IC103 & IC122 in Tx-Rx Unit) 3) Part List 1 upgrading 4) Part Number of Part List 2 upgrading General Manual Scope This manual is intended for use by experienced technicians familiar with similar types of communication...
Page 3 Installation Safety Guidelines Do not mount the mobile radio overhead or on a sidewall unless you take special precautions. If someone were to remove the radio and fail to replace it properly, road shock could bump the radio loose, and the falling radio could, in some circumstances, cause serious injury to the driver or a passenger.
Page 4 Radio Overview Front Panel View ① ① ① ① Power Press the power button to switch the radio on/off. Selector Knob ② ② ② ② 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 5: Lcd Display
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. 2.
Page 6 ① Antenna Connector Used to connect external antenna. ① Power input Connector Adopt HYT-authorized DC power cable and 13.6 V input AC power. ① Speaker Jack Used to connect external speaker and only available for the plug of 3.5 mm.
Page 7 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 Scan Information Mode DTMF Set Mode 2-Tone Set Mode 5-Tone Set Mode...
Page 8 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 Input” MODE While holding down [PF1] User Set Mode PWR Password key, turn on the power...
Page 9: User Set Mode
Test Mode ---------------------------- TEST & 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 While holding down [PF4] Firmware Down Load Mode ---------------------------- key, turn on the power...
Page 10 Power On Text None ------------------- Refer to Appendix 1 “Character Input” Power on text HYT MOBILE Max.12 characters Power On Password Select submenu “PWR Password”, press [PF6], the power-on password is displayed. Press [PF1] to edit the power-on password. Function Name...
Page 11 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 CTCSS 254.1 CTCSS CTCSS 67.0* (0.1Hz step)
Page 12 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 023-754 TX Signalling CDCSS 754N [PF4]: standard/step mode [PF3]: CDCSS/ reverse CDCSS CDCSS (1step) CDCSS 000N* 000-777 CDCSS 777N* CDCSS 023I CDCSS (standard) 023-754 reverse...
Page 13 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 Channel up PF1 CH Up CH Down Channel down PF1 CH Down...
Page 14 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 PF1 HomeCH Public Address Public address PF1 PA...
Page 15 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 Zone Down Zone down PF2 Zone Down Moni A...
Page 16 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 PF2Horn Alert LCD BackLight LCD backlight PF2 LCD Light [PF2] Scramble Scrambler...
Page 17 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 PF3 DLabel Display Frequency Display frequency PF3 DFreq Ch No./ch label/zone No./zone...
Page 18 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 PF3Emergency Message Message PF3 Message None...
Page 19 Ch No./ch label/zone No./zone Display Mode PF4 DMode label/RX Freq. 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 Sel HDC PF4 SelHDC Tx Power Switch TX power PF4 TxPower Scan [Default]...
Page 20 Message Message PF4 Message 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 Zone Down [Default] Zone down...
Page 21 Add/Del as not in scan status Nuisance channel temp.Del Add/Del PF5 Add/Del Priority ch temp. del 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...
Page 22 Zone Up [Default] PF6 Zone Up Zone up Zone Down PF6 Zone Down Zone down 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...
Page 23 Horn Alert PF6Horn Alert Horn alert LCD BackLight PF6 LCD Light LCD backlight Scramble PF6 Scramble Scrambler Compander Compander PF6 Compande [PF6] AUX A AUXA port output control PF6 AUX A AUX B AUXB port output control PF6 AUX B Send GPS Send GPS PF6 Send GPS...
Page 24 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. If data is written to the radio from PC, it can be programmed into the FLASH.
Page 25 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” on the LCD, or enters User Mode if Clone Mode is set OFF by your dealer. (2) Press [PF1], the radio enters Wireless Clone Mode with “WIRELESS”...
Page 26 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 27 Dealer Mode 1: Channel Set Select menu “Channel Set”, then press [PF6] to enter Channel Set Mode. Function Name Settings Display Remarks Channel 1-512 Selector Knob: change a Step 1 channel or zone (default: ch) Zone [PF5]: toggle between channel Channel and zone Zone 1-256...
Page 28 CDCSS 023I CDCSS (standard) 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 T 400.00000 5.0K/6.25K/1M [PF4]: 5.0K/6.25K/1M step TX Frequency 100.0000-550.0000MHz 625 0 Step 2.5K: only for TM800 T 400.00000...
Page 29 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 Shift On High TXPower HI Middle TXPower MI...
Page 30 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 Default: None 2-ToneDecode 1-8 Decode 8 Appears when 5-Tone is 5-Tone Rx...
Page 31 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 PHILLPOTTS 12 characters maximum Current input position is indicated Zone Name Name...
Page 32 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 Channel 1 Zone Home 1-512 Channel Home Channel 512 Display “END” indicating the end of menu option Dealer Mode 3: Function Set Select menu “Function Set”, then press [PF6] to enter Function Set Mode.
Page 33 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 HookNoDecode squelch Off Hook Decode Decode ctcss/cdtcc during off Decode...
Page 34 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 Sub LCD Display CH Number LCD Off Zone Number...
Page 35 Ignition Off Ignition Sense Ignition On 00Hour 00Min 00-59Min Step 1Min Adjust timer: 00Hour 59Min Ignition Sense 0Hour, 0Min-24Hour, 00Min Power off Timer PF5: 1MIN/1HOUR step change 00Hour 00Min 00-24Hour Step 1Hour 24Hour 00Min Display “END” indicating the end of menu option 3.
Page 36 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. Function Setting Display Remarks Alert Tone 1-8 Alert Tone 1...
Page 37 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. Function Setting Display...
Page 38 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 ExternalMoni AUX 1 Up Key Input Up Key AUX 1 Down Key...
Page 39 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 ExternalMoni AUX 2 Up Key Input Up Key AUX 2 Down Key...
Page 40 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 ExternalMoni AUX 3 Input Up Key Up Key AUX 3 Input...
Page 41 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 ExternalMoni AUX 4 Input Up Key Up Key AUX 4 Input...
Page 42 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 ExternalMoni AUX 5 Input Up Key Up Key AUX 5 Input...
Page 43 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 ExternalMoni AUX 6 Input Up Key Up Key AUX 6 Input...
Page 44 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 ExternalMoni AUX 7 Input Up Key Up Key AUX 7 Input...
Page 45 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. Function Setting Display...
Page 46 Ch: Off, 1-512 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 Off,1-512 Selector Knob: change a channel Priority Channel 2 Zone or zone (default CH) [PF5]: channel/zone Channel PRICH2...
Page 47 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 Priority 2 Revert PRIO2 Priority 2 Scan +TalkBack...
Page 48 2. Select submenu “ZoneScan List”, then press [PF6] to enter. Function Setting Display Remarks Selector Knob s elect zone 1-512 ： Select a Zone Zone 100 Only existing zone can be set. [PF6]: enter the second item List Enable Zone Scan List Only enabled list for zone list scan, Enable/Disable List Disable...
Page 49 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 Digit Time 100ms Default 100ms...
Page 50 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 Auto Dial Auto Dial On AutoDial On AutoDialP Off AutoDP Off...
Page 51 2. Select submenu D TMF 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...
Page 52 3. Select submenu “AutoDialList”, then press [PF6] to enter. Function Setting Display Remarks AutoDial 1-32 Auto Dial No. Step 1 AutoDial 32 Name ASCII CODE AutoDial Auto Dial Name Name No input ----------- Code It will be scrolled as >=12 ABCD12345678 Auto Dial Code ABCD123456789012...
Page 53 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. Function Setting Display...
Page 54 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. Step 1 2-Tone 8 Decode1: A-B Decode1: A-C...
Page 55 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 Decode2: C Long C None Decode3: None...
Page 56 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 Long C Decode4: C Press [PF4] to switch between Step...
Page 57 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 58 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 59 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 60 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 61 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 62 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 63 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 64 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 65 TM-800 SERVICE MANUAL Display “END” indicating the end of menu options 5. Select submenu “Decode Telegr”, then press [PF6] to enter. Function Setting Display Remarks DecodeTel 1 5Tone Decode Telegram Decode Telegram 1-10 Decode Tel 10 ZVEL1 ZVEL1 ZVEL2 ZVEL2...
Page 66 TM-800 SERVICE MANUAL None None Normal Normal Frame 3 Default: None Rx Address Rx Address Single Single Tone Disable Moni Disable Monitor Close Default: Open Moni Close Open Moni Open Disable Stun Disable Stun Stun Enable Revive Stun Revive Stun...
Page 67 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 ResetTime1 1-180s Default: Off Step 1s Auto ResetTime180 NDDT 0ms Next Decode Delay...
Page 68 TM-800 SERVICE MANUAL Dealer Mode 9: Emergency Set Select menu “Emergency Set”, then press [PF6] to enter. Function Setting Remarks Display ZONE: 1-256 Selector Knob: change a Emergency Zone channel or zone (default ch) Emergency CH CH: 1-512 CH 100.
Page 69 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 70 TM-800 SERVICE MANUAL 1. Select submenu ‘Stun Set”, then press [ [ [ [ P F6 ] ] ] ] to enter. Function Setting Display Remarks Stun ------------ No encode, disable Stun Disable Stun Stun Encode 0000000 0000000 Stun ~FFFFFFF...
Page 71 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 72 TM-800 SERVICE MANUAL Mode WireCloneOff Clone Mode Mode Default WireClone On Mode ModelSel Off Model Set Mode Mode Default ModelSel On Prog FirmWare Off Firmware Download Mode Prog Default FirmWare On Version Off Firmware Version Display Default Version On Display “END” indicating the end of menu options 2.
Page 73: Test Mode
TM-800 SERVICE MANUAL Test Mode 1. Turn power on while holding down [PF2], the radio enters Test Mode. Frequency test channel and signalling test channel are displayed. In this mode, the channel frequency (center, low, high) can be modified through the programming software.
Page 74 TM-800 SERVICE MANUAL Signallings are shown as follows: Description None None None 100Hz square wave CTCSS 67.0Hz CTCSS 67.1Hz CTCSS 151.4Hz CTCSS 151.4Hz CTCSS 210.7Hz CTCSS 210.7Hz CTCSS 250.3Hz CTCSS 250.3Hz CDCSS 023N CDCSS 023N CDCSS 754I CDCSS 754I DTMF (159D)
Page 75 TM-800 SERVICE MANUAL In Test Mode, press [PF4], then press the following key to enable the corresponding functions. Compander On/Off “ ▼ ” icon appears when compander is turned On Clock shift On/Off “A” icon appears when clock shift is turned On 1200/2400bps MSK “...
Page 76 TM-800 SERVICE MANUAL 4. In Adjustment Mode, the following functions can be accomplished by key pressing. Function Description Volume Up Down Volume down Return to Adjustment Item menu Squelch Open/Close “ ” icon appears when squelch is opened. Enter the previous item (Down)
Page 77 TM-800 SERVICE MANUAL 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 Narrow Center CDCSS BAL ***...
Page 78 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 79 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 80: Receiver Circuit
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 81 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 82: Pll Circuit
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 83 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 84 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 85 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 86 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 87 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 88 TM-800 SERVICE MANUAL 7. DTMF Receiver: BU8872FS (TX-RX Unit IC122) 7-1 Pin Function Pin No. Name Description INPUT Signal input. OSCOUT This is the output pin for internal oscillator. OSCIN This is the input pin for the internal oscillator. The decoded DTMF signal is output.
Page 89 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 90 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 91 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 92 TM-800 SERVICE MANUAL Component Description 1. TX-RX Unit Ref. No. Part Name Type Description IC102 Power module Power module IC103 AT29C040-90T1 Flash ROM IC104 NJM2904V Single-supply dual operational amplifier IC105 AT2408N12.5S EEPROM IC106 AK2346 Audio processor IC107 TA75W558FU Dual operational amplifier...
Page 93 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3101061050060 Chip capacitor 0603 1UF K 10V C101 B10N 3101061050060 Chip capacitor 0603 1UF K 10V C102 3101071050010 Chip capacitor 0805 1UF K 10V...
Page 94 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3101061020000 Chip capacitor 0603 1000PF K 50V C152 3101061020000 Chip capacitor 0603 1000PF K 50V C153 3101061020000 Chip capacitor 0603 1000PF K 50V...
Page 95 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3101064740020 Chip capacitor 0603 0.47UF Z 16V C200 3101062220010 Chip capacitor 0603 2200PF K 50V C201 3101061040010 Chip capacitor 0603 0.1UF K 16V...
Page 96 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3101060700020 Chip capacitor 0603 7PF B 50V C248 3101060600010 Chip capacitor 0603 6PF B 50V C249 3101061510000 Chip capacitor 0603 150PF J 50V...
Page 97 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3101061020000 Chip capacitor 0603 1000PF K 50V C296 3101061030010 Chip capacitor 0603 0.01UF K 25V C297 3104081060070 Ta-capacitor 1206 10UF M 16V C298 3101062240000 Chip capacitor 0603 0.22UF K 10V...
Page 98 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3101061030010 Chip capacitor 0603 0.01UF K 25V C344 3101061040010 Chip capacitor 0603 0.1UF K 16V C345 3101061020000 Chip capacitor 0603 1000PF K 50V C346 3101061030010 Chip capacitor 0603 0.01UF K 25V...
Page 99 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3104084750020 Ta-capacitor 1206 4.7UF M 10V C397 3104084750030 Ta-capacitor 1206 4.7UF K 16V C398 3104083350000 Ta-capacitor 1206 3.3UF±20% 10V C399 3103994760080 C401 Electrolytic capacitor 2512 47UF±20% 25V 105 ℃...
Page 100 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3104082250030 Ta-capacitor 1206 2.2UF K 16V C809 3104081060070 Ta-capacitor 1206 10UF M 16V C810 3104081060070 Ta-capacitor 1206 10UF M 16V C811 3101061020000 Chip capacitor 0603 1000PF K 50V C812 3101066830000 Chip capacitor 0603 0.068UF K 16V...
Page 101 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3302030500030 Zener diode UDZSTE(175.1B) 5.1V D113 3303060300010 Switching diode HVC131TRF-E D114 3303030100020 Switching diode DAN235E D115 3303030100020 Switching diode DAN235E D116 3303060300010 Switching diode HVC131TRF-E...
Page 102 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3609018000010 IC122 DTMF Decode IC BU8872FS SSOP-A16 ROHM(RoHS) 3606045000000 D/A convert IC M62364FP#U0 8-BIT IC125 3607002000180 And/Or trigger TC4013BF IC127 3604025004350 PLL ADF4111BRUZ...
Page 103 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3213212101010 Multi-layer inductor 1008 100nH L142 3221506601000 Chip ferrite bead 0603 600 ±25% L143 3221506601000 Chip ferrite bead 0603 600 ±25% L144 3221506601000 Chip ferrite bead 0603 600 ±25% L145 3221506601000 Chip ferrite bead 0603 600 ±25%...
Page 104 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3499000000140 Transistor 2SK508-K52-T1B-A Q144 3499000000140 Transistor 2SK508-K52-T1B-A Q145 3499000000140 Transistor 2SK508-K52-T1B-A Q146 3408002000010 Transistor 2SC3357-T1-A Q147 3408002000010 Transistor 2SC3357-T1-A Q601 3403008000010 Transistor DTC114EE...
Page 105 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3001063300000 Chip resistor 0603 33 J 1/10W R137 3001063330010 Chip resistor 0603 33K J 1/10W R138 3001061030010 Chip resistor 0603 10K J 1/10W...
Page 106 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3001069130000 Chip resistor 0603 91K D 1/10W R188 3001066230010 Chip resistor 0603 62K J 1/10W R189 3001064730000 Chip resistor 0603 47K J 1/10W...
Page 107 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3001061010000 Chip resistor 0603 100 J 1/10W R236 3001064730000 Chip resistor 0603 47K J 1/10W R237 3001061030010 Chip resistor 0603 10K J 1/10W...
Page 108 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3001061020010 Chip resistor 0603 1K J 1/10W R288 3001068220000 Chip resistor 0603 8.2K J 1/10W R289 3001060000000 Chip resistor 0603 0 J 1/10W...
Page 109 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3001062230000 Chip resistor 0603 22K J 1/10W R339 3001060000000 Chip resistor 0603 0 J 1/10W R340 3001061520000 Chip resistor 0603 1.5K J 1/10W R341 3001062220000 Chip resistor 0603 2.2K J 1/10W...
Page 110 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3001060000000 Chip resistor 0603 0 J 1/10W R389 B10H 3001060000000 Chip resistor 0603 0 J 1/10W R390 3001061030010 Chip resistor 0603 10K J 1/10W R392 3001065120000 Chip resistor 0603 5.1K J 1/10W...
Page 111 TM-800 SERVICE MANUAL Part List 1 Tx-Rx Unit Part No. Material Description Qty Ref. No. Address Remarks 3001064740010 Chip resistor 0603 470K J 1/10W R818 3001065610000 Chip resistor 0603 560 J 1/10W R819 3001065610000 Chip resistor 0603 560 J 1/10W...
Page 112: Vco Unit
TM-800 SERVICE MANUAL Part List 1 VCO Unit Remarks Material No. Material Description Ref.NO. Address Remarks 1 3001060000000 Resistor 0603 0 J 1/10W R706 2 3001060000000 Resistor 0603 0 J 1/10W R705 3 3001060000000 Resistor 0603 0 J 1/10W R707...
Page 113 TM-800 SERVICE MANUAL Part List 1 VCO Unit Remarks Material No. Material Description Ref.NO. Address Remarks 48 3213212272000 Inductor 1008 2.7uH L709 49 3213212272000 Inductor 1008 2.7uH L707 50 3213212272000 Inductor 1008 2.7uH L706 51 3213212332009 Inductor 1008 3.3uH L708 52 3213212332009 Inductor 1008 3.3uH...
Page 114: Display Unit
TM-800 SERVICE MANUAL Part List 1 Display Unit Material NO. Material Description Ref. No. Address Remarks R506 3001060000000 Resistor 0603 0 J 1/10W 3001060000000 Resistor 0603 0 J 1/10W R511 3001060000000 Resistor 0603 0 J 1/10W R522 R548 3001060000000 Resistor 0603 0 J 1/10W...
Page 115 TM-800 SERVICE MANUAL Part List 1 Display Unit Material NO. Material Description Ref. No. Address Remarks R531 3001064730000 Resistor 0603 47K J 1/10W 3001065620010 Resistor 0603 5.6K J 1/10W R504 3001066820000 Resistor 0603 6.8K J 1/10W R558 R545 3001161010000 Resistor 2010 100 1/2W 3001162290000 Resistor 2010 2.2 J 1/2W...
Page 116 IC TA7805F 5V IC501 IC503 3610003003229 CPU uPD78F0112H 8-BIT 3619006004290 IC R3111H421C 0.7v-10v IC502 X501 3701098340020 Crastyl 9.8304MHz 4001000000019 Fuse MINISMDC020-2 1812-0.2A F501 410M800101210 TM-800 CN PCB FR4 1.6T/2L/4P J503 5202008100029 Chip socket 52746-0890 8pin 5202011100019 Chip socket B11B-ZR-SM3-TF 11pin J504...
Page 117 TM-800 SERVICE MANUAL Part List 1 Display Unit VCO Unit Material NO. Material Description Ref. No. Address Remarks 1 3001060000000 Resistor 0603 0 J 1/10W R706 2 3001060000000 Resistor 0603 0 J 1/10W R705 3 3001060000000 Resistor 0603 0 J 1/10W...
Page 118 TM-800 SERVICE MANUAL Part List 1 Display Unit VCO Unit Material NO. Material Description Ref. No. Address Remarks 47 3210306101009 Inductor 0603 100nH L704 48 3213212272000 Inductor 1008 2.7uH L709 49 3213212272000 Inductor 1008 2.7uH L707 50 3213212272000 Inductor 1008 2.7uH...
Page 119 TM-800 SERVICE MANUAL...
Page 120 TM-800 SERVICE MANUAL Exploded View 2 1 2 0 2 3 2 2 2 7 2 6...
Page 121 Shield cover (power amplification module) SUS301-1/2H 3601004000570 Power amplification module 7102508000100 Machine screws M2.5*8 Stainless steel 7102606020000 Self-tapping screws 2.6*6 Mild steel TM-800 PCB (main board) 7102606021000 T8-head self-tapping screws 2.6*6 Mild steel 4200090000000 Power cable (mobile radio) 6201175000010 External board SUS304-1/2B 6100227000000...
Page 122 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 123 TM-800 SERVICE MANUAL 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. 8. Loosen the screws on the main PCB board; lift the two clips (power amplification cooler), and take out the main PCB.
Page 124 TM-800 SERVICE MANUAL 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 125 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 126 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 127 TM-800 SERVICE MANUAL Packing...
Page 128: Key Functions
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 129 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 130 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...
Page 131 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 132 TM-800 SERVICE MANUAL [ PF6] [ PF2] +Power O N CDCSS devi at i on( Cent er ) CDCSS devi at i on [ PF3] [ PF6] Fr equency Panel t est m ode CDCSS devi at i on( Low)
Page 133 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 Operation Frequency...
Page 134 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 135 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 136 TM-800 SERVICE MANUAL Model RX/TX 1 ( FC ) 2 (F L ) 3 (FH ) RX(MHz) 155.15 136.15 173.85 145.55 164.55 155.00 155.20 155.40 TX(MHz) 155.00 136.00 174.00 145.50 164.50 155.00 155.20 155.40 （） 481.15 450.15 465.55 481.00 481.20...
Page 137 TM-800 SERVICE MANUAL Transmitter Measurement Adjustment Specification Item Condition /Remarks Test Instrument Terminal Part Method Enter adjustment item Radio 4.TX , each Ch Adjust software “ ” Communication Adjust to Ch frequency Error <50Hz Frequency corresponds to a settings Test Set...
Page 138 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 139 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 140 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 p ress the squelch ，...
Page 141 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 142 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 143 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 144 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 145 TM-800 SERVICE MANUAL Specifications General VHF: 136-174 MHz UHF: 350-400 MHz 400-470 MHz Frequency Range 440-490 MHz 450-512 MHz 480-526 MHz Number of Channels Channel Spacing 25/12.5 KHz Operating Voltage 13.6V DC ±15% Standby Current 0.5A Current Rx Current <2.0A...
Page 146 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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