CONTENTS General…………………………………………………………………………………………..1 Radio Overview………………………………………………………………………….………2 Software Specification…………………………………………………………………………5 Circuit Description………………………………………………..…………………………..79 Semiconductor Data………………………………………………………………………….84 Component Description…………………………………………..…………………………91 Part List 1…………………………………………………………………………….…………92 Exploded View…………………………………………………………………..……………117 Part List 2…………………………………………………………………………..………….
RMU800A 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.
RMU800A 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. ③ LCD Display Please refer to “LCD Display” section. ④ Up/Down Key Volume Up/Down, Channel Up/Down, Zone Up/Down features can be programmed to the keys (Set by your dealer).
RMU800A 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. 2. Display transmit power level (H, M or L). 3. Display the preprogrammed function. Appears when the selected channel is busy. Appears when [MONI] key is pressed to disable CTCSS, CDCSS, DTMF or 2-Tone/5-Tone.
RMU800A SERVICE MANUAL Rear Panel View ① Antenna Connector Used to connect external antenna. ② Power input Connector Adopt Relm-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.
RMU800A SERVICE MANUAL Software Specification Radio Modes 1.
RMU800A SERVICE MANUAL 2.
RMU800A SERVICE MANUAL Test Mode TEST & ADJUST ADJUST MODE MODE Model Set Mode Firmware Version Display Mode Firmware Down Load Mode Wire Clone Mode ----------------------------------------------------- While holding down [PF2] - key, turn on the power ----------------------------------------------------- While holding down [PF3] - key, turn on the power --------------------------- While holding down [PF4] - key, turn on the power --------------------------- While holding down [PF5] - key
RMU800A SERVICE MANUAL Function Set Select submenu “Function Set”, then press [PF6] to enter Function Set Mode. No.
RMU800A SERVICE MANUAL UST Code Select submenu “UST Code”, press [PF6] to enter UST Code Mode. No. Function Name 1 UST Code No. Settings Display 1-32 UST Remarks 1 UST 32 2 UST Code Name ASCII CODE Name -------- No input R OFF Off CTCSS (EIA standard) R CTCSS 67.0 67.0-254.1Hz R CTCSS 254.1 CTCSS R CTCSS (0.1Hz step) 67.0-254.1Hz 67.0* R CTCSS 254.
RMU800A SERVICE MANUAL T OFF Off CTCSS (EIA standard) 67.0-254.1Hz CTCSS (0.1Hz step) 67.0-254.1Hz 4 TX Signalling T CTCSS 67.0 R CTCSS 254.1 T CTCSS 67.0* T CTCSS 254.
RMU800A SERVICE MANUAL Key Assignment Select submenu “Key Assign”, press [PF6] to program the programmable function key PF1-PF6. No.
RMU800A SERVICE MANUAL Scan 20 PF1 Scan Scan Add/Del in non-scan mode Add/Del 21 PF1 Add/Del Nuisance channel temp.Del Priority ch temp.
RMU800A SERVICE MANUAL 2 [PF2] Off 1 PF2 Off None VOL Up 2 PF2 VOL Up Volume up VOL Down 3 PF2 VOL Down Volume down CH Up 4 PF2 CH Up Channel up CH Down 5 PF2 CH Down Channel down Zone Up 6 PF2 Zone Up Zone up Zone Down 7 PF2 Zone Down Zone down Moni A 8 PF2 MoniA MONI A Moni B 9 PF2 MoniB MONI B Moni C 10 PF2 MoniC MONI C Moni D 11 PF2 MoniD MONI D DisplayLabel 12 PF2 DLabel Display channel label Display Frequency 13 PF2 DFreq Display frequency DisplayMode [Default
RMU800A SERVICE MANUAL 2 3 [PF2] [PF3] Reverse 22 PF2 Reverse Reverse frequency Talk Around 23 PF2 TA Talkaround Sel SQL 24 PF2 SelSQL Select SQL Home CH 25 PF2 HomeCH Home channel Public Address 26 PF2 PA Public address Horn Alert 27 PF2Horn Alert Horn alert LCD BackLight 28 PF2 LCD Light LCD backlight Scramble 29 PF2 Scramble Scrambler Compander 30 PF2 Compande Compander AUX A 31 PF2 AUX A AUXA port output control AUX B 32 PF2 AUX B AUXB port output control Send GPS
RMU800A SERVICE MANUAL 3 [PF3] Moni A 8 PF3 MoniA MONI A: Monitor Unmute-Momentary Moni B 9 PF3 MoniB MONI B: Monitor Unmute-Toggle Moni C 10 PF3 MoniC MONI C: Carrier Squelch-Momentary Moni D 11 PF3 MoniD MONI D: Carrier Squelch-Toggle Display Label 12 PF3 DLabel Display channel label Display Frequency 13 PF3 DFreq Display frequency Display Mode 14 PF3 DMode Ch No./ch label/zone No./zone label/RX Freq.
RMU800A SERVICE MANUAL 3 4 [PF3] [PF4] Scramble 29 PF3 Scramble Scrambler Compander 30 PF3 Compande Compander AUX A 31 PF3 AUX A AUXA port output control AUX B 33 PF3 AUX B AUXB port output control Send GPS 33 PF3 Send GPS Send GPS Emergency Call 34 PF3Emergency Emergency call Message 35 PF3 Message Message Off 1 PF4 Off None VOL Up 2 PF4 VOL Up Volume up VOL Down 3 PF4 VOL Down Volume down CH Up 4 PF4 CH Up Channel up CH Down 5 PF4 CH Down Channel down Zone Up 6 PF
RMU800A SERVICE MANUAL Display Mode 14 PF4 DMode Ch No./ch label/zone No./zone label/RX Freq. User Selectable Tone 15 PF4 UserTone Tone 01-32(CTCSS/CDCSS) Sel 2Tone 16 PF4 Sel2Tone Select 2-Tone encode Sel 5Tone 17 PF4 Sel5Tone Select 5-Tone encode Sel HDC 18 PF4 SelHDC Tx Power 19 PF4 TxPower Switch TX power 20 PF4 Scan Scan Scan [Default] Add/Del 4 21 PF4 Add/Del Add/Del as not in scan status Nuisance channel temp.Del Priority ch temp.
RMU800A SERVICE MANUAL 5 [PF5] Message 35 PF4 Message Message Off 1 PF5 Off None VOL Up 2 PF5 VOL Up Volume up VOL Down 3 PF5 VOL Down Volume down CH Up 4 PF5 CH Up Channel up CH Down 5 PF5 CH Down Channel down Zone Up 6 PF5 Zone Up Zone up Zone Down 7 PF5 Zone Down Zone down Moni A 8 PF5 MoniA MONI A: Monitor Unmute-Momentary Moni B 9 PF5 MoniB MONI B: Monitor Unmute-Toggle Moni C 10 PF5 MoniC MONI C: Carrier Squelch-Momentary Moni D 11 PF5 MoniD MONI D: Carrier Squelc
RMU800A SERVICE MANUAL Add/Del as not in scan status Add/Del 21 PF5 Add/Del Nuisance channel temp.Del Priority ch temp.
RMU800A SERVICE MANUAL 6 PF6 Zone Up Zone up Zone Down 7 PF6 Zone Down Zone down Moni A 8 PF6 MoniA MONI A: Monitor Unmute-Momentary Moni B 9 PF6 MoniB MONI B: Monitor Unmute-Toggle Moni C 10 PF6 MoniC MONI C: Carrier Squelch-Momentary Moni D 11 PF6 MoniD MONI D: Carrier Squelch-Toggle Display Label 12 PF6 DLabel Display channel label Display Frequency 13 PF6 DFreq Display frequency Display Mode 14 PF6 DMode Ch No./ch label/zone No./zone label/RX Freq.
RMU800A SERVICE MANUAL 6 7 8 9 [PF6] [SELECTOR KNOB] [Up/Down] END Horn Alert 27 PF6Horn Alert Horn alert LCD BackLight 28 PF6 LCD Light LCD backlight Scramble 29 PF6 Scramble Scrambler Compander 30 PF6 Compande Compander AUX A 31 PF6 AUX A AUXA port output control AUX B 32 PF6 AUX B AUXB port output control Send GPS 33 PF6 Send GPS Send GPS Emergency Call 34 PF6Emergency Emergency call Message 35 PF6 Message Message Volume Knob [Default] Volume Knob Volume knob Channe
RMU800A 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. If data is written to the radio from PC, it can be programmed into the FLASH. Data programming is accessible by programming software.
RMU800A SERVICE MANUAL 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” on the LCD. The initial frequency that matches the destination is displayed in 2 seconds. Turn the Selector Knob to choose desired frequency.
RMU800A 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 activated mode option 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. Turn the Selector Knob to select one of the following mode options: No.
RMU800A SERVICE MANUAL Dealer Mode 1: Channel Set Select menu “Channel Set”, then press [PF6] to enter Channel Set Mode. No. Function Name Settings Channel Step 1 1 Display 1 CH 1-512 Zone Channel Zone 1-256 Step 1 Remarks 1 1 CH 512 1 CH 1 256 CH 1 Selector Knob: change a channel or zone (default: ch) [PF5]: toggle between channel and zone 250 0 R 100.00000 2 RX Frequency 2.5K/5.0K/6.25K/1M 100.0000-550.0000MHz RX Signalling 625 0 R 400.00000 1M R 550.
RMU800A SERVICE MANUAL R CDCSS 023I CDCSS (standard) 023-754 reverse 3 R CDCSS 754I RX Signalling R CDCSS 000I* CDCSS (1 step) 000-777 reverse R CDCSS 777I* 250 0 T 100.00000 4 TX Frequency 2.5K/5.0K/6.25K/1M 100.0000-550.0000MHz 500 0 T 400.00000 625 0 T 400.00000 Selector Knob: change at step frequency [PF4]: 2.5K/5.0K/6.25K/1M step Step 2.5K: only for RMU800A VHF(<200MHz) 1M T 550.00000 Blank --------------T OFF Off CTCSS (EIA standard) 67.0-254.1Hz CTCSS (0.1Hz 67.0-254.
RMU800A SERVICE MANUAL 6 Optional Signalling Off Option Off DTMF DTMF 2-Tone 2 Tone 5-Tone 5 Tone HDC2400TM HDC2400 HDC1200 HDC1200 BCL Off Default Default Off BCL 7 BCL (Busy CTCSS/CDCSS Channel Lockout) CTCSS/CDCSS BCL Opt Signalling Opt Signal BCL 8 9 Clock Shift TX Power 10 Wideband / Narrowband 11 Scan ADD/DEL 12 Compander 13 Scrambler 14 PTT ID Carrier Only Carrier Only Off Shift Off On Shift On High TXPower HI Middle TXPower MI Low TXPower LO Default Wid
RMU800A SERVICE MANUAL PHILLPOTTS Name PHILLPOTTS ----------------- Name ----------------- None 2T Decode None 15 Channel Name 2T Decode 1 2-Tone Decode 2-ToneDecode 1-8 5-Tone Rx Address HDC2400 5-Tone Rx Address 5TRx Address 12345 None None HDC2400TM Call 1-8 List 1 List 8 5-Tone Tx Address 5TTx Address23456 TM 5-Tone Tx Address None HDC2400TM Call 2 HDC2400TM Call 1-8 5-Tone 18 Parameter 19 Appears when 2-Tone is selected Default: None 2T Decode 8 16 17 12 characters maximum
RMU800A SERVICE MANUAL Dealer Mode 2: Zone Information Select menu “Zone Inform”, then press [PF6] to enter Zone Set Mode. No. 1 Function Zone Select Display Setting 100 Zone 100 Remarks Selector Knob: select a zone Only existing zone can be set.
RMU800A SERVICE MANUAL TOT Reset Off 8 9 10 Off TOT Reset Time TOT Reset 1 TOT Reset 15 Or Signal OR And Signal AND On CLR Transpond On Off CLR TranspondOff 1-15s Signalling Control Default 1s/1Step Default ClearToTranspond 11 Zone Home Channel 12 END 1-512 END Home Channel 1 Default Default Home Channel 512 Display “END” indicating the end END of menu option Dealer Mode 3: Function Set Select menu “Function Set”, then press [PF6] to enter Function Set Mode.
RMU800A SERVICE MANUAL 1. Select submenu “Function 1”, then press [PF6] to enter. No.
RMU800A SERVICE MANUAL 11 12 2. Roll Over END Off RollOver Off On RollOver On END Display rolls over as over 12 characters Display “END” indicating the end of menu options END Select submenu “Function 2”, then press [PF6] to enter. No.
RMU800A SERVICE MANUAL 5 Ignition Sense Off Ignition Off On Ignition On 00-59Min Step 1Min 6 Ignition Sense Power off Timer 00-24Hour Step 1Hour 7 3. END IGN 00Hour 00Min IGN 00Hour 59Min IGN 00Hour 00Min Adjust timer: 0Hour, 0Min-24Hour, 00Min PF5: 1MIN/1HOUR step change IGN 24Hour 00Min END Display “END” indicating the end of menu option END Select submenu “Tone Volume”, then press [PF6] to enter. No.
RMU800A SERVICE MANUAL 5 6 7 4. Volume Min Volume Max Off VolumeMinOff 1-64 Step 1 VolumeMin 64-127 Step 1 END END 1 VolumeMin 64 VolumeMin 64 VolumeMin 127 Display “END” indicating the end of menu option END Select submenu “Alert Tone”, then press [PF6] to enter. No. Function 1 Alert Tone No.
RMU800A SERVICE MANUAL 0-2550ms Step 10ms 5 Tone Duration No. 1-14 Step 1 0-2550ms Step 10ms 6 5. END END Dura No.1 0ms Dura No.1 2550ms Dura No.14 0ms Dura No.14 2550ms END Display “END” indicating the end of menu option Select submenu “AUX Inform”, then press [PF6] to enter. No.
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RMU800A 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 4.1 Scan Set 4.2 ZoneScanList 1. Select submenu “Scan Set”, then press [PF6] to enter. No.
RMU800A SERVICE MANUAL PRICH1 Off Ch: Off, 1-512 1 Selector Knob: change a channel or zone (default CH) Channel PRICH1 [PF5]: channel/zone [PF4]: Priority CH On/Off Off PRICH2 Off Ch: Off,1-512 1 Selector Knob: change a channel or zone (default CH) Channel PRICH2 [PF5]: channel/zone [PF4]: Priority CH On/Off Both Off PrioBoth Off Priority 1 On Priority 1 On Priority 2 On Priority 2 On Both On Prio Both On Off 5 6 7 8 Priority Channel1 Zone Priority Channel 2 Zone Priority Ch Te
RMU800A SERVICE MANUAL Scan Last used (RX) Revert Call Default Scan Last used (TX) Revert Used 11 12 13 14 15 Revert Channel Revert Channel Display Dropout Delay Time Scan Dwell Time Off Hook Scan 16 END Selected Scan Revert Selected + TalkBack Scan SEL TalkBack Priority 1 Scan Revert PRIO1 Priority 1 +TalkBack Scan P1 TalkBack Priority 2 Scan Revert PRIO2 Priority 2 +TalkBack Scan P2 TalkBack On Revt Display On Off Revt Display Off 3s Scan DropOutT 3 1-300s Scan DropOutT
RMU800A SERVICE MANUAL 2. Select submenu “ZoneScan List”, then press [PF6] to enter. No. Function 1 Select a Zone 2 Zone Scan List Enable/Disable 3 Add/Del 4 END Setting Display 100 Zone 100 List Enable List Disable Add Zone 1 Add Del Zone 1 Del END END Remarks Selector Knob：select zone 1-256 Only existing zone can be set. [PF6]: enter the second item Only enabled list for zone list scan, Selector Knob: change channel 1-512 Only existing zone can be added/ deleted.
RMU800A SERVICE MANUAL 2 First Digit Time 0ms 1st DT 0ms 100ms 1st DT 100ms 500ms 1st DT 500ms 1000ms 1st DT 1000ms *# DT 0ms 100ms *# DT 100ms 500ms *# DT 500ms 1000ms *# DT 1000ms 200ms Tx RDT 200ms 100-1000ms Tx RDT 100ms 0ms 3 4 5 6 7 Digit Time (＊and＃) DTMF Transmit Delay Time Dial ID DTMF Hold Time Store & Send First digit = first digit time + digit time Default 10ms/1Step First: Max (first digit time,*and# time) + digit time Not first: * and # time + digit
RMU800A SERVICE MANUAL 8 D Key Assignment D Code DTMF DKey D-Code Pause1-16s DTMF DKeyPause 1 DTMF DkeyPause 16 9 DTMF Side Tone 10 Auto Dial 11 Auto Dial Programming 12 Manual Dial 13 14 Keypad Auto Tx END Side Tone Off DTM F SideTone Off Side Tone On DTM F SideTone On Auto Dial Off AutoDial Off Auto Dial On AutoDial On AutoDialP Off AutoDP Off AutoDialP On AutoDP On Manual Dial Off ManuDial Off Manual Dial On ManuDial On Auto Tx Off KeyAutoTxOff Not sent DTMF when on
RMU800A SERVICE MANUAL 2. Select submenu "DTMF Decode", then press [PF6] to enter. No.
RMU800A SERVICE MANUAL 3. Select submenu “AutoDialList”, then press [PF6] to enter. No. Function 1 Auto Dial No. 2 3 Auto Dial Name Auto Dial Code Setting 1-32 Step 1 AutoDial 1 AutoDial 32 ASCII CODE Name AutoDial N ABCD1234567890 12 4 Display END END Remarks Name ----------- No input Code ABCD12345678 It will be scrolled as >=12 Code ----------- No input Display “END” indicating the End of menu options END 4. Select submenu “PTT ID”, then press [PF6] to enter. No.
RMU800A 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 1. Menu Item 6.1 2-Tone Encode 6.2 2-Tone Decode 6.3 2-Tone Option Select submenu “2-Tone Encode”, then press [PF6] to enter. No. 1 2 3 4 5 6 7 Function 2-Tone Code No. Setting 1-32 Step 1 2-Tone Name 2-Tone 1 -------- Name -------- 288.5-3100Hz 288.5-3100Hz Tone A Duration 0.5-10.0s Step 0.
RMU800A SERVICE MANUAL Off 8 Long A Duration 0.5-10.0s 9 2. END END Dur. Long: Off Dur. Long: 0.5S Dur. Long: 10.0S Display “END” indicating the end of menu options END Select submenu “2-Tone Decode”, then press [PF6] to enter. No. Function 1 2-Tone Code No.
RMU800A SERVICE MANUAL 3 4 Decode 2 Format Decode 3 Format None Decode2: None A-B Decode2: A-B A-C Decode2: A-C A-D Decode2: A-D B-A Decode2: B-A B-C Decode2: B-C B-D Decode2: B-D C-A Decode2: C-A C-B Decode2: C-B C-D Decode2: C-D D-A Decode2: D-A D-B Decode2: D-B D-C Decode2: D-C Long A Decode2: A Long B Decode2: B Long C Decode2: C None Decode3: None A-B Decode3: A-B A-C Decode3: A-C A-D Decode3: A-D B-A Decode3: B-A B-C Decode3: B-C B-D Decode3: B-D C
RMU800A SERVICE MANUAL 5 Decode 4 Format None Decode4: None A-B Decode4: A-B A-C Decode4: A-C A-D Decode4: A-D B-A Decode4: B-A B-C Decode4: B-C B-D Decode4: B-D C-A Decode4: C-A C-B Decode4: C-B C-D Decode4: C-D D-A Decode4: D-A D-B Decode4: D-B D-C Decode4: D-C Long A Decode4: A Long B Decode4: B Long C Decode4: C Step A: 288.5Hz 6 Tone A Frequency Press [PF4] to switch between 0.1Hz/1Hz/10Hz/100Hz step 288.5-3100Hz Step A: 3100.
RMU800A SERVICE MANUAL 10 11 12 13 14 Call Response 1 Call Response 2 Call Response 3 Call Response 4 Decode 1 None D1 None Alert D1 Alert Transpond D1 Transpond Alert & Tran D1 Alert & Tran None D2 None Alert D2 Alert Transpond D2 Transpond Alert & Tran D2 Alert & Tran None D3 None Alert D3 Alert Transpond D3 Transpond Alert & Tran D3 Alert & Tran None D4 None Alert D4 Alert Transpond D4 Transpond Alert & Tran D4 Alert & Tran Tone A D1 Tone A Decode Code D1 Dec
RMU800A SERVICE MANUAL 15 Decode 2 Alert Tone Tone A D2 Tone A Decode Code D2 Decode Code Alert 1-8 16 Decode 3 Alert Tone Decode 4 Alert Tone D3 Tone A Decode Code D3 Decode Code 19 20 Tone A Duration Tone B Duration Gap Duration D3 Alert Tone 8 D4 Tone A Decode Code D4 Decode Code 0.5-10.0s Step 0.1s 0.5-10.0s Step 0.1s 0.0-2.0s Step 0.1s Off 21 D3 Alert Tone 1 Tone A Alert 1-8 18 D2 Alert Tone 8 Tone A Alert 1-8 17 D2 Alert Tone 1 Long A Duration 0.5-10.
RMU800A SERVICE MANUAL 22 3. No. END END Function Setting 2-Tone Tx Rise Time 100-1000ms Display Rise Time 200ms Rise Time 100ms Rise Time 1000ms 2 3 Display “END” indicating the end of menu options Select submenu “2-Tone Option”, then press [PF6] to enter.
RMU800A SERVICE MANUAL 1. Select submenu “Parameter”, then press [PF6] to enter. Select Parameter 1-16 to set 5-Tone parameters. No.
RMU800A SERVICE MANUAL 5 6 TX/RX Address Standard Decode Code 1 EEA TxRx EEA Eurosignal TxRx Eurosignal Natel TxRx NATEL EIA TxRx EIA MODAT TxRx MODAT CCITT TxRx CCITT USER DEFINED TxRx USER DEFINED None DC1 None Decode Telegram 1-10 None 7 Decode Code 2 Decode Code 3 Decode Code 4 10 END DC2 None DC3 None DC3 Decode Telegram Telegram 1 1-10 DC3 Telegram 10 None 9 DC1 Telegram 10 DC2 Decode Telegram Telegram 1 1-10 DC2 Telegram 10 None 8 DC1 Telegram 1 DC4 None DC4 Decod
RMU800A SERVICE MANUAL 4. Select submenu “Encode Teleg”, then press [PF6] to enter. No.
RMU800A SERVICE MANUAL Disable 5 Transpond Decode Decode Tel 1 DecodeTel 1-10 6 Disable Decode Tel 10 Name 12345 TelegramName Name -----------7 3. END Default: Disable END END Refer to Appendix 1 “Character Input” Display “END” indicating the end of menu options Select submenu “EncodeFrame”, then press [PF6] to enter. No.
RMU800A SERVICE MANUAL 4. Select submenu “EncodeOption”, then press [PF6] to enter. No.
RMU800A SERVICE MANUAL 11 5. END Display “END” indicating the end of menu options END END Select submenu “Decode Telegr”, then press [PF6] to enter. No.
RMU800A SERVICE MANUAL 5 6 7 8 9 Frame 3 Monitor Stun Scan Transpond None F3 None Normal Nor FFFFFFFF Rx Address F3 Rx Address Single F3 Single Tone Disable Moni Disable Close Moni Close Open Moni Open Disable Stun Disable Stun Stun Enable Revive Stun Revive Kill Stun Kill Disable Scan Disable Start Scan Start Stop Scan Stop None None Encode EncodeTel 1 Telegram1-32 EncodeTel 32 Alert Tone 11 Group Alert Tone 12 END Default: Open Default: Disable Default:
RMU800A SERVICE MANUAL 6. Select submenu “Decode Option”, then press [PF6] to enter. No.
RMU800A SERVICE MANUAL Dealer Mode 9: Emergency Set Select menu “Emergency Set”, then press [PF6] to enter. No. Function 1 Emergency Zone Emergency CH 2 3 4 5 6 Emergency Cycle Emergency Key Delay Time Tx Duration Rx Duration Emergency Type Setting Zone: 1-256 CH: 1-512 8 Emergency ID Emergency Led Selector Knob: change a channel or zone (default ch) 1 CH 100 [PF5]: channel/zone Continuous Cycle Contin 1-200 Cycle 1 Step 1 Cycle 200 Off Key Deley Off 0.1-5.0s Key Deley 0.
RMU800A SERVICE MANUAL Emergency 9 10 11 Display Text Emergency Mode Tone 1 Duration ---------------------- Tex t ---------------------- No Text to be Displayed Emergency Tex t Emergency Max 12 Silent Mod e Silent Audible Mod e Audible 0-255s Step 1s 12 Tone 2 Duration 0-255s Step 1s 13 END END Ton e 1 Dur. 0S Ton e 1 Dur. 255S Ton e 2 Dur. 0S Ton e 2 Dur. 255S END Display “END” indicating the end of menu options Dealer Mode 10: STUN Inform Select menu “Stun Inform”.
RMU800A SERVICE MANUAL 1. Select submenu ‘Stun Set”, then press [PF6] to enter. No. 1 2 3 2. Function Stun Encode Stun Response END Setting Display ------------ Stun Disable 0000000 Stun 0000000 ~FFFFFFF Stun FFFFFFF TX Inhibit Stun TX Inhibit TX/RX Inhibit Stun TXRX Inhibit Kill Stun Kill END Remarks No encode, disable Stun Default Display “END” to indicate the end of menu options END Select submenu “Stun Password”, then press [PF6] to view the password.
RMU800A SERVICE MANUAL 3 4 5 6 7 8 9 10 11 12 Zone Information Mode Function Set Mode Scan Information Mode DTMF Set Mode 2-Tone Set Mode 5-Tone Set Mode Embedded Message Mode Emergency Set Mode Stun Set Mode Test Mode OFF Mode ZoneSet Off ON Mode ZoneSet On OFF Mode FuncSet Off ON Mode FuncSet On OFF Mode ScanSet Off ON Mode ScanSet On OFF Mode DTMFSet Off ON Mode DTMFSet On OFF Mode 2ToneSet Off ON Mode 2ToneSet On OFF Mode 5ToneSet Off ON Mode 5ToneSet On
RMU800A SERVICE MANUAL 13 Clone Mode Model Set Mode 14 Firmware Download Mode 15 16 17 Firmware Version Display END OFF Mode WireCloneOff ON Mode WireClone On OFF Mode ModelSel Off ON Mode ModelSel On OFF Prog FirmWare Off ON Prog FirmWare On OFF Ver Version Off ON Ver Version On END END Default Default Default Default Display “END” indicating the end of menu options 2. Select submenu “DBD Password”, then press [PF6] to view the password. Then press [PF1] to edit the password.
RMU800A SERVICE MANUAL In this mode, the channel frequency (center, low, high) can be modified through the programming software. CH1 ( C) CH 2 ( L ) CH 3 ( H ) CH 4 CH 5 CH 6 CH 7 CH 8 RX(MHz) 155.15 136.15 173.85 145.55 164.55 155.00 155.20 155.40 （V） TX(MHz) 155.00 136.00 174.00 145.50 164.50 155.00 155.20 155.40 1 RX(MHz) 481.15 450.15 511.85 465.55 496.55 481.00 481.20 481.40 （U2） TX(MHz) 481.00 450.00 512.00 465.50 496.50 481.00 481.20 481.
RMU800A SERVICE MANUAL 2. In Test Mode, the following functions can be accomplished by key pressing. Key Function Up Volume Up Down Description Volume down PF1 Wide band/Narrow band PF2 Squelch Open/Close PF3 Test Mode/ Adjustment Mode “ PF4 Activate compander function PF5 Signalling Up PF6 Signalling Down Selector Knob Channel Up/Down ” icon appears when squelch is opened.
RMU800A SERVICE MANUAL In Test Mode, user can press the following key to switch models. ① Press [PF3] to toggle between Test Mode and Adjustment Mode. Press [PF4] to toggle between Adjustment Mode and Model Set Mode ([PF4] is invalid if Model Set Mode is inhibited by your dealer. Refer to “Model Set Mode” for details). ② Press [PF6] to enter the selected mode. 4. In Adjustment Mode, the following functions can be accomplished by key pressing.
RMU800A SERVICE MANUAL 5. Setting Items （＊＊＊：1-256） Setting Item CDCSS Balance Wideband/ Narrowband Wide Narrow Frequency __C 100Hz square wave Low CDCSS BAL *** __L 100Hz square wave High CDCSS BAL *** __H 100Hz square wave CDCSS BAL *** N_C 100Hz square wave 67.0 DEV *** __C CTCSS: 67.0Hz __L CTCSS: 67.0Hz __H CTCSS: 67.0Hz N_C CTCSS: 67.0Hz __C CTCSS: 151.4Hz __L CTCSS: 151.4Hz __H CTCSS: 151.4Hz n_C CTCSS: 151.4Hz __C CTCSS: 254.1Hz __L CTCSS: 254.
RMU800A SERVICE MANUAL SQL 9 Wideband SQL Open SQL 9 Narrowband SQL3 Wideband SQL3 Narrowband SQL 9 Wideband SQL 9 Narrowband SQL Close SQL3 Wideband SQL3 Narrowband Center OpenSQL9 *** __C No signalling Low OpenSQL9 *** __L No signalling OpenSQL9 *** __H No signalling OpenSQL9 *** n_C No signalling High Center Center OpenSQL3 *** __C No signalling Low OpenSQL3 *** __L No signalling High OpenSQL3 *** __H No signalling OpenSQL3 *** n_C No signalling Center Center Cl
RMU800A SERVICE MANUAL Model Set Mode 1. 2. 3. 4. 5. 6. 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. are displayed. Turn the Selector Knob to choose model 1-6. Press [PF6] to confirm. Press [PF3] to return to Test Mode. Notes: 1.
RMU800A SERVICE MANUAL Circuit Description 1. Frequency Configuration The receiver utilizes double conversion superheterodyne. The first IF is 73.05MHz and the second is 450KHz. The first local oscillator signal is supplied by PLL circuit. The second local oscillator signal (73.5MHz) is generated from TCXO (73.5MHz); The PLL circuit also generates the frequencies needed in the transmitter (See Fig.1). Frequency Range: 450 MHz—512MHz 2.
RMU800A SERVICE MANUAL 2.3 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 (73.05MHz) to create a 450KHz second IF signal. The second IF signal is then fed to a ceramic filter (N: CF101, CF103; W: CF102, CF104) to eliminate unwanted signals. The resulting signal is detected by IC119 and output from Pin9 as an AF signal. 2.
RMU800A 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. 3.3 APC The APC is used to keep the power output at a constant preset value.
RMU800A 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. Figure 4 Control Circuit 5.2 Power Supply Power supply of the radio is derived from the battery which supplies battery B+. D135 and D137 are over-voltage protection Diodes.
RMU800A SERVICE MANUAL Vout provides power supply to IC115, IC114, IC113, and IC111, which produces 8V, 9V, 5V, and 3.3V voltage to the circuit. 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.
RMU800A 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 I/O Function 1 Vout O Reset. 2 GND 3 Vin GND. I Supply voltage. 3. Display CPU: UPD780112(Display Unit IC503) 3-1.Pin Function Pin No. Name I/O Function 1 AVref +5V. 2 AVss GND. 3 IC(vpp) Internal connected. 4 VDD +5V. 5 Vss GND. 6 X1 7 X2 8 RESET 9 XT1 +5V.
RMU800A SERVICE MANUAL 28 HMBL MIC backlight control signal output. 29 HOOK/RXD0 Hook signal input/ Serial data input. 30 TXD0 O PC commands (TXD)/connects to PTT. 31 RLED O Red LED output. 32 GLED O Green LED output. 33 PTT O PTT/connect to TXD0. 34 DNKEY I Up key. 35 UPKEY I Down key. 36 KEYBL I Key backlight. 37 IN1 Not used. 38 IN2 Not used. 39 PF6 I PF6 Key Input. 40 PF5 I PF5 Key Input. 41 PF4 I PF4 Key Input. 42 PF3 I PF3 Key Input.
RMU800A SERVICE MANUAL 6. Audio processor: AK2346 (TX-RX Unit IC106) 6-1 Pin Function Pin No. Name I/O Function 1 AGNDIN I Analog ground input pin. 2 AGND O Analog ground output pin. 3 TXIN I Transmit audio signal input pin. 4 TXINO O TXA1 feedback output pin. 5 LIMLV I Limit level adjuster pin. 6 EXTLIMIN I External signal input pin pre-limiter circuit. 7 MOD O The modulated transmit signal output pin. 8 VSS 9 TCLK 10 TDATA GND.
RMU800A SERVICE MANUAL 7. DTMF Receiver: LC73872M (TX-RX Unit IC122) 7-1 Pin Function Pin No. Name I/O Description 1 INPUT I Signal input. 2 NC 3 PD I The IC goes to lower power mode when this pin is pulled high. 4 OSCO O Oscillator output. 5 OSCI I Oscillator input. 6 NC No connection. 7 VSS GND. 8 LOAD No connection. I Inputting a clock to this pin allows the serial data to be output two or more times. 9 SD O The decoded DTMF signal is output.
RMU800A SERVICE MANUAL 9. Power amplifier: TDA8561Q (TX-RX Unit IC126) 9-1 Pin Function Pin No. Name I/O Description 1 -INV1 I 2 GND(S) 3 INV2 4 RR Supply voltage ripple rejection. 5 VP1 Supply voltage. 6 OUT1 7 GND1 8 OUT2 9 NC 10 OUT3 11 GND2 12 OUT4 13 VP2 14 MODE I Mode select switch input. 15 INV3 I Inverting input 3. 16 VDIAG O Diagnostic output. 17 -INV4 I Non-inverting input 4. Non-inverting input 1. Signal ground. I O Inverting input 2. Output 1.
RMU800A SERVICE MANUAL 15. CPU: M16C (Tx-Rx Unit IC120) 15-1 Pin Funcion PIN No. PORT PIN NAME I/O DESCRIPTION 1 P94/DA1 2TN/5TN I 2-tone/5-tone decode pulse input 2 P93/DA0 DTMF O DTMF/2Tone/5Tone/BEEP output 3 P92 SBC O SB power switch control.
RMU800A SERVICE MANUAL 38 P56 NC O NC (left floating) 39 P55 HOLD O NC (left floating) 40 P54 NC O NC (left floating) 41 P53 NC O NC (left floating) 42 P52 RD O Read (for expansion) 43 P51 NC O NC (left floating) 44 P50 WR O Write (for expansion) 45 P47 HNC O Horn alert control 46 P46 SHIFT O Clock frequency shift 47 P45 W/N O W/N switch 48 P44 CS0 O Signal select (expansion chip) 49 A19 A19 O NC A18~A9 A18~A9 O FLASHROM address bus 60 VCC VC
RMU800A SERVICE MANUAL Component Description 1. TX-RX Unit Ref. No. Part Name Type Description IC102 IC Power module Power module IC103 IC AT29C02-90T1 Flash ROM IC104 IC NJM2904V Single-supply dual operational amplifier IC105 IC AT2408N12.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. Description Address R238 3001062220000 Resistor 0603 2.2KΩ J 1/10W(RoHS) T6J R239 3001062220000 Resistor 0603 2.2KΩ J 1/10W(RoHS) B6E R240 3001061030010 Resistor 0603 10KΩ J 1/10W(RoHS) T6H R241 3001062710000 Resistor 0603 270Ω J 1/10W(RoHS) B9D R242 3001062220000 Resistor 0603 2.2KΩ J 1/10W(RoHS) B7E B9D R243 3001062710000 Resistor 0603 270Ω J 1/10W(RoHS) R248 3001062220000 Resistor 0603 2.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. Description Address R238 3001062220000 Resistor 0603 2.2KΩ J 1/10W(RoHS) T6J R239 3001062220000 Resistor 0603 2.2KΩ J 1/10W(RoHS) B6E R240 3001061030010 Resistor 0603 10KΩ J 1/10W(RoHS) T6H R241 3001062710000 Resistor 0603 270Ω J 1/10W(RoHS) B9D R242 3001062220000 Resistor 0603 2.2KΩ J 1/10W(RoHS) B7E B9D R243 3001062710000 Resistor 0603 270Ω J 1/10W(RoHS) R248 3001062220000 Resistor 0603 2.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. Description Address R331 3001061840000 Resistor 0603 180KΩ J 1/10W(RoHS) R332 3001062730010 Resistor 0603 27KΩ J 1/10W(RoHS) B7F R334 3001060000000 Resistor 0603 0Ω J 1/10W(RoHS) B7G B6G R335 3001060000000 Resistor 0603 0Ω J 1/10W(RoHS) B7J R336 3001062240010 Resistor 0603 220KΩ J 1/10W(RoHS) B6F R337 3001061820000 Resistor 0603 1.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. Description Address C113 3101061020000 Capacitor 0603 1000PF K 50V GRM188R11H102KA01B MURATA(RoHS) T8G C114 3101061030010 Capacitor 0603 0.01UF K 25V(RoHS) B8H C115 3101061030010 Capacitor 0603 0.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. C159 3101064710000 Capacitor 0603 470PF K 50V MURATA(RoHS) C160 3101064710000 Capacitor 0603 470PF K 50V MURATA(RoHS) T3J C161 3101061040010 Capacitor 0603 0.1UF K 16V (RoHS) T4J C162 3101064710000 Capacitor 0603 470PF K 50V MURATA(RoHS) B5D C163 3101061020000 Capacitor 0603 1000PF K 50V GRM188R11H102KA01B MURATA(RoHS) T5M C164 3101061040010 Capacitor 0603 0.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. Description Address C250 3101061030010 C251 NC C252 3101061030010 Capacitor 0603 0.01UF K 25V(RoHS) B6C C253 3101080200000 Capacitor 1206 2PF C 500V MURATA(RoHS) T2M C254 3101062240000 Capacitor 0603 0.22UF K 10V(RoHS) B4E C255 3101060800010 Capacitor 0603 8PF B 50V MURATA(RoHS) B7C C256 3101064710000 Capacitor 0603 470PF K 50V MURATA(RoHS) B6C C257 3101061030010 Capacitor 0603 0.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. Description Address C296 3101061020000 Capacitor 0603 1000PF K 50V GRM188R11H102KA01B MURATA(RoHS) B1L C297 3101061030010 Capacitor 0603 0.01UF K 25V(RoHS) B4K C299 3101062240000 Capacitor 0603 0.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. Description Address C341 3101061050080 Capacitor 0603 1UF Z 16V MURATA(RoHS) B6H C342 3101061020000 Capacitor 0603 1000PF K 50V GRM188R11H102KA01B MURATA(RoHS) B3K C343 3101061040010 Capacitor 0603 0.1UF K 16V (RoHS) B8J C344 3101061030010 Capacitor 0603 0.01UF K 25V(RoHS) T8C C345 3101061040010 Capacitor 0603 0.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. Description Address C602 3101061590010 Capacitor 0603 1.5PF B 50V MURATA(RoHS) C603 3101063300000 Capacitor 0603 33PF J 50V MURATA(RoHS) T6M C604 3101064710000 Capacitor 0603 470PF K 50V MURATA(RoHS) T6M C605 3101063300000 Capacitor 0603 33PF J 50V MURATA(RoHS) T6M C606 3101060200010 Capacitor 0603 2PF B 50V MURATA(RoHS) T6M C607 3101061590010 Capacitor 0603 1.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. Description Address L105 3215006100009 Inductor 0603 10nH LL1608-FH10NK TOKO L106 3221506601009 Chip ferrite bead 0603 600Ω±25% BLM18AG601SN1 MURATA(100MHz) B7K L107 3221506601009 Chip ferrite bead 0603 600Ω±25% BLM18AG601SN1 MURATA(100MHz) B10N L108 4518026000009 Trimmer IF transformer 25.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. L148 3210208881009 Wound inductor 1206 880nH LQH31HNR88J03L MURATA T7J L149 3210208881009 Wound inductor 1206 880nH LQH31HNR88J03L MURATA B6D 4518026000009 Trimmer IF transformer 25.2MHz 780nH±2%(1M-200M) 5JHH-059798026 SAGAMI L150 #N/A 4518026000009 Description Address Remark #N/A Trimmer IF transformer 25.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No. Description Address D603 3304010100089 Diode 1SV279(TPH3) 1.6*0.8mm TOSHIBA T8M D604 3304010100089 Diode 1SV279(TPH3) 1.6*0.8mm TOSHIBA T8M D605 3304010100089 Diode 1SV279(TPH3) 1.6*0.8mm TOSHIBA T6M D606 3304010100089 Diode 1SV279(TPH3) 1.6*0.8mm TOSHIBA T6M D801 3303020100029 Diode MA2S11100L SS-Mini 0.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No.
RMU800A SERVICE MANUAL Part List 1 Tx-Rx Unit Ref. No Part No.
RMU800A SERVICE MANUAL Part List 1 Display Unit Ref. No. Material No.
RMU800A SERVICE MANUAL Part List 1 Display Unit Ref. No. Material No. Material Description R531 Address 3001064730000 Resistor 0603 47KΩ J 1/10W(RoHS) R504 3001065620010 Resistor 0603 5.6KΩ J 1/10W(RoHS) B1B R558 3001066820000 Resistor 0603 6.8KΩ J 1/10W(RoHS) B1D B2B R545 3001161010000 Resistor 2010 100Ω 1/2W(RoHS) B2C R518 3001162290000 Resistor 2010 2.2Ω J 1/2W(RoHS) B1D R519 3001162290000 Resistor 2010 2.
RMU800A SERVICE MANUAL Part List 1 Display Unit Ref. No. Material No.
RMU800A SERVICE MANUAL Part List 1 VCO Unit Ref. No Part No.
RMU800A SERVICE MANUAL Part List 1 VCO Unit Ref. No Part No. C720 3101060590010 Description Capacitor 0603 0.5PF B 50V MURATA(RoHS) Address T1G C721 3101061010010 Capacitor 0603 100PF J 50V GRM1882C1H101JA01B MURATA(RoHS) T1H C722 3101060700020 Capacitor 0603 7PF B 50V MURATA(RoHS) T1H C724 3101064710000 Capacitor 0603 470PF K 50V MURATA(RoHS) B2G C725 3101064710000 Capacitor 0603 470PF K 50V MURATA(RoHS) B1G TC701 3102992000049 Trimmer capacitor 3.2*2.5*1.
RMU800A SERVICE MANUAL Exploded View － 115 －
RMU800A SERVICE MANUAL Part List 2 No. Part No. Part Description Material PC*ABS QTY Remark 1 6000224000009 Rear cover 2 7102623020009 Self-tapping screws 2.
RMU800A SERVICE MANUAL 35 7300007100009 Contact rotary switch 1 36 5205000000269 Jack (Remote SP MIC) 1 5110000000119 RMU800ALCD (FSTN) 1 37 38 4301030000000 Switch (channel) 1 39 6201177000009 VCO cover 1 40 6201181000009 Clip (power amplification cooler) 1 41 6201182000009 Clip (power module cooler) 1 42 7500072000009 Absorbing sponge 1 － 117 －
RMU800A 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. 3. Pull out the selector knob, loosen the five screws and then remove the PCB board from the panel. 4. Lift the tabs on both sides of the transceiver, and then remove the rear cover. 5.
RMU800A 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. 8. Loosen the screws on the main PCB board; lift the two clips (power amplification cooler), and take out the main PCB.
RMU800A SERVICE MANUAL 3. Screw on the four adjustment screws (each with one shrapnel and one shim). 4. 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).
RMU800A 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. 3. As shown in the below figure, make sure that the rubber seal is placed above the cable, then plug the 11-pin connector into the rear panel socket. 4.
RMU800A 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. Push and secure the main panel so that the 6 tabs on the top and bottom of panel are securely fixed.
RMU800A SERVICE MANUAL Packing － 123 －
RMU800A SERVICE MANUAL Adjustment 1. Key Functions 1-1 Front Panel 1. Power switch. 2. Selector Knob. 3. LCD Display. 4. Down key. 6. Indicator light. 7. Microphone Jack. 8. PF1 key. 9. PF2 key. 11. PF4 key. 12. PF5 key. 5. Up key. 10. PF3 key. 13. PF6 key. 1-2 Panel Test Mode When the Function is Off( ▽ does not appear ) Controls Function Up Volume up. Down Volume down. PF1 Wide/narrow changeover. PF2 Noise squelch switch. PF3 Test mode/ Tuning mode changeover.
RMU800A SERVICE MANUAL When the Function is On (press PF4, ▽ appears) Controls Function Description PF1 Compander on/off. When compander opens, ▼ appears. PF2 Beat shift on/off. When the remove frequency is on, “A” appears. PF3 MSK 1200/2400bps changeover. When MSK is 2400bps，“ PF4 Return to test mode. PF5 No function. PF6 No function. ” appears. 1-3 Panel Tuning Mode Controls Function Description Volume up. Up Down Volume down. PF1 Test mode/tuning mode changeover.
RMU800A 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) 4 5 6 7 8 0 RX(MHz) 155.15 136.15 173.85 145.55 164.55 155.00 155.20 155.40 （V） TX(MHz) 155.00 136.00 174.00 145.50 164.50 155.00 155.20 155.40 1 RX(MHz) 481.15 450.15 511.85 465.55 496.55 481.00 481.20 481.40 （U2） TX(MHz) 481.00 450.00 512.00 465.
RMU800A SERVICE MANUAL 3-2. Tuning Item and Display Refer to “5. Setting Items” in “Test Mode”. 3-3. Flow Chart 1. : Use the [PF4] and [PF5] keys. 2. : Use the [PF6] key. 3. Use the [SELECTOR] knob to set an adjustment value (1 to 256) for each adjustment item. 4. Use the [PF6] key to move to the next item.
RMU800A SERVICE MANUAL [PF6] [PF2]+Power ON Frequency [PF6] TX CDCSS deviation(Center) CDCSS deviation [PF3] [PF6] Panel test mode CDCSS deviation(Low) [PF6] [PF6] CDCSS deviation(High) TX high power (Center) power [PF6] [PF6] CDCSS deviation(narrow Center) TX high power (Low) [PF6] [PF6] TX high power (High) Rotate select knob [PF6] TX Middle power(Center) [PF6] DTMF deviation DTMF deviation [PF6] [PF6] DTMF deviation(narrow) TX Middle power (Low) [PF6] [PF6] Rotate select knob
RMU800A SERVICE MANUAL 4. Test Equipment Required for Alignment Test Equipment Method Major Specifications Standard Signal Generator (SSG) Frequency Modulation Output 450 to 512 MHz Frequency modulation and external modulation 0.
RMU800A SERVICE MANUAL 4-2. Test Cable for Microphone input The following test cable is recommended. 5. Warnings When Removing or Installing the Shield Cover 1. 2. 3. 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. When removing the shielding cover, squeeze the hole marked with an arrow as shown on the diagram and pull it straight up.
RMU800A SERVICE MANUAL Adjustment Description The radio can be adjusted by PC programming software or by manual adjustment. Manual adjustment procedure of RMU800A is as follows. (Refer to “Test Mode” and “Adjustment mode” in the section Radio Modes.) Instrument: Radio Communication Test Set Scanner 20A/30V Power Supply Digital Voltmeter Power Meter Signal Line (with dummy load) 1 set 1 set 1 set 1 set 1 set 1 pcs Adjustment: 1.
RMU800A SERVICE MANUAL Model RX/TX 1 ( FC ) 2 (F L ) 3 (FH ) 4 5 6 7 8 0 RX(MHz) 155.15 136.15 173.85 145.55 164.55 155.00 155.20 155.40 （V） TX(MHz) 155.00 136.00 174.00 145.50 164.50 155.00 155.20 155.40 1 RX(MHz) 481.15 450.15 511.85 465.55 496.55 481.00 481.20 481.40 （U2） TX(MHz) 481.00 450.00 512.00 465.50 496.50 481.00 481.20 481.40 2 RX(MHz) 375.15 350.15 399.85 362.55 387.55 375.00 375.20 375.40 （U5） TX(MHz) 375.00 350.00 400.00 362.
RMU800A SERVICE MANUAL Transmitter Measurement Item Adjustment Specification Condition Test Instrument Terminal Enter adjustment item “1”, each Ch 4.TX Frequency corresponds to a specific TX Freq Part Method /Remarks Adjust to CH frequency Error <50Hz Radio Adjust software Communication ANT settings Test Set High power: PO=45±1.0W Adjust software Each Ch corresponds 5.
RMU800A SERVICE MANUAL Each Ch corresponds to a specific TX Freq， 10.CTCSS enter adjustment item Deviation “5”, adjust 67Hz/127.3Hz/254.1Hz CTCSS Each Ch corresponds 11. CDCSS Deviation to a specific TX Freq， enter adjustment item“6” Each Ch corresponds 12.DTMF Deviation to a specific TX Freq， enter adjustment item “7” Each Ch corresponds 13.MSK to a specific TX Freq, enter adjustment item “8” Each Ch corresponds 14.
RMU800A SERVICE MANUAL Receiver Measurement Item Adjustment Specification Condition Test Instrument Terminal Part /Remarks Method Adjust the gain to Enter adjustment 15.RF bandpass “10”, filter the Max. value, the item each Ch corresponds to a Adjust Scanner ANT. TP1 software is on the left most settings specific RX Freq corresponding freq to bandpass waveform. Press [PF6] to save. Adjust L107、 16.IF bandpass filte TC101、 Center Freq is 73.
RMU800A SERVICE MANUAL Radio Press [PF2] to Communication Enter adjustment item “11”, 19.SQ Open turn to CH (H), CH(C), CH (L) Adjust software Test Set settings at SQL3 settings , open the SSG output: and SQL9，press -119dBm（level 3） [PF6] to save. SSG output -111dBm（level 9） Radio 20.
RMU800A SERVICE MANUAL Terminal Function 1. Display Unit Pin No. Name Description J501 (To MIC Jack) 1 MBL MIC backlight control signal output. “H”: On, “L”:Off. 2 PSB Power outputs after power switch (13.6V+15%). 3 GND Ground. 4 PTT/TXD PTT signal input/ Serial data output. 5 ME MIC ground. 6 MIC MIC signal input. 7 HOOK/RXD Hook signal input/ Serial data input. 8 CM Serial data input for keypad MIC. J503(To DISPLAY UNIT) 1 VCC +5V. 2 E Ground.
RMU800A SERVICE MANUAL 2. TX-RX Unit Pin No. Name Description J101 (To DISPLAY UNIT) 1 ME MIC ground. 2 MIC MIC signal output. 3 E Ground. 4 REST Reset signal input. 5 TXD2 Serial data output. 6 RXD2 Serial data input. 7 E Ground. 8 PSW Power switch control signal output. 9 SB Power input after power switch (13.6V+15%). 10 SP1 BTL input for remote speaker output. 11 SP2 BTL input for remote speaker output. J104 (To VCO UNIT) 1 ST TX RX switch. 2 HT RF output.
RMU800A SERVICE MANUAL Pin No. Name Description J111 (at the rear panel; to Secondary Development Interface) 1 TXD0 Serial data input. 2 RXD0 Serial data output. 3 MIC2 External MIC signal output. 4 ME MIC ground. 5 AFO Filtered Audio output. 6 AUX5 Programmable auxiliary port. 7 AUX4 Programmable auxiliary port. 8 AUX3 Programmable auxiliary port. 9 HRO Horn Relay Output. 10 HRI Horn Relay Input. 11 PA1 MIC signal output. 12 PA2 MIC signal output. 13 E Ground.
RMU800A SERVICE MANUAL 8 E GND. 9 AUX1 Programmable auxiliary port. 10 AUX3 Programmable auxiliary port. 11 AUX4 Programmable auxiliary port. 12 AUX2 Programmable auxiliary port. 13 DTMFIO DTMF input/output. 14 TXD0 Serial data output. 15 RXD0 Serial data input. J112 (To GPS) 1 TXD1 Serial data output. 2 RXD1 Serial data input. 3 3.3V +3.3V. 4 E Ground. 5 5V +5V.
RMU800A SERVICE MANUAL Specifications Frequency Range 450 MHz—512MHz Number of Channels (Zone) Conventional CH:Max.512 (Max 256 zone) Channel Spacing 25/12.5KHz 5/6.25 PLL Step 13.6V±15% Power Supply Duty Cycle Transmit: 20% Operation Temperature -30℃~~+60℃ Frequency Stability ±2.0ppm Antenna Impedance 50Ω Dimensions (W×H×D) 175mm×48mm×170mm Weight(net) 1.
RMU800A SERVICE MANUAL Appendix 1 Entering Characters Entering characters with an optional microphone keypad CHARACTER KEY Number of times key is pressed 1 1 2 3 4 5 6 7 NUMBER 8 Space 1 2 A B C a b c 2 3 D E F d e f 3 4 G H I g h i 4 5 J K L j k l 5 6 M N O m n o 6 7 P Q R S p q 8 T U V t u v 9 W X Y Z w x r s 7 8 y z 0 9 0 A @ ! # $ % ^ & ~ B + - * / = \ _ | C ( ) < > [ ] { } D , .
