E- TECH C o., Ltd 1/16 ▶ Table of Contents◀ 1. Introduction 2. Description of Unit 3. Technical Specifications 4. Theory of Operation 5. Circuit Descriptions 6. Parts List 7. Block Diagram 8. CONTROL Layout (Upper Side) 9. CONTROL Layout (Bottom Side) 10. RF Layout (Upper Side) 11. RF Layout (Bottom Side) 12. Circuit FILE: IS 400 service manual.doc Diagram 2004.05.
E- TECH C o., Ltd 2/16 1. Introduction IS400 has a compact size with a various features in the range of 405~490MHz. IS400 Has a various features shown as below. IS400 constructed with a microprocessor controlled, temperature compensated Phase Locked Loop(PLL) frequency synthesizer. The radio features a double conversion receiver and a direct FM transmitter modulator.
E- TECH C o., Ltd 3/16 3. Technical Specifications 3-1 General 1) Frequency range : 405~490 MHz 2) Channels : 255 Channels 3) Channel spacing : 12.5 kHz/25 kHz 4) Communication method : Simplex 5) Antenna Impedance : 50 ohm 6) : Helical Antenna Antenna 7) Power supply voltage : 8) Current Drain : LI-1700mAh Li-Ion battery pack(Voltage: 7.4V DC) When Transmitting(4W) - When Receiving(0.
E- TECH C o., Ltd 4/16 3-3 Receiver 1) Receiver Type : Double Super Hetero type 2) Sensitivity : -0.25uV 이하(12dB SINAD 시) 3) Frequency Stability : ±0.00025%(±2.5PPM) 4) SPURIOUS Rejection : 5) Adjacent Channel Selectivity: -70 dB -60 dB (Narrow) , -70 dB (Wide) 6) Distortion : 5% (1 kHz 60%) 7) Hum & Noise : -40 dB(HP8920A 300Hz ～ 3kHz BPF) 8) Audio output : 1000 mW 9) BAND SPREAD : 85MHz 10) Speaker size : 45 pi 4.
E- TECH C o., Ltd 5/16 4-1 Features & Operation 1. Monitor Press the Monitor key momentarily to disable the Tone squelch. 2. Radio Call By using Various 5Tone, individual / Group call is available. 16 Receiving codes are available as well as open call. 3. Missed calls list 16 Missed calls can be listed. If a call remains unanswered, the call will be stored by the radio. 4. contact list During a call, the contact list may be used to give access to up to 16 preprogrammed numbers accessed via the menu. 5.
E- TECH C o., Ltd 6/16 4-2 LCD Display and Icons 1.ANT GAZE ; Shows the received signal strength. 2.TX POWER HIGH: Indicate power level 3.KEY LOCK: Appears during key lock function is ON. 4.ALART(BEEP) ON/OFF: Appears when beep sound is turned ON. 5.Battery level indicator: Indicates reaming battery power. 6.VOX ON/OFF: Appears when VOX function is turned On. 7.SCAN: Appears when Scan function is activated. 8.SCRAMBLE: Appears while the voice scrambler function is activated. 9.TALK AROUND Indicator.
E- TECH C o., Ltd 7/16 3. Contact list 1). to enter Menu Mode. 2) or 3) to until to select 4) or 5) to exit to scroll list 4. Status call list 4-1. Making STATUS call 1) to enter Menu Mode. 2) or 3) 4) to until to select or to scroll list 5) Push PTT KEY for sending message on the LCD. 4-2 Make STATUS Message 1) to enter Menu Mode. 2) or 3) to until to select FILE: IS 400 S ervice manual.doc 2005.11.
E- TECH C o., Ltd 4) or 5) 8/16 to scroll list to SELECT 5. Lone work 1). to enter Menu Mode. 2) or 3) to until to select 4) or to select ON/OFF 6. Tx power . 1). to enter Menu Mode. 2) or 3) to select 4) 5) to until or to select HIGH / LOW POWER to select 7. Tx Tone Selecting Transmitting TONE(CTCSS/DCS). 1). to enter Menu Mode. FILE: IS 400 S ervice manual.doc 2005.11.
E- TECH C o., Ltd 2) or 3) 9/16 to until to select 4) or to Select TONE을 either CTCSS or DCS. 0= NON TONE 1-38 CTCSS 101 – 183 DCS TONE 5) to select exit 8. Rx Tone Changing Receiving TONE(CTCSS/DCS). 1). to enter Menu Mode. 2) or 3) 4) to until to select or to select TONE either CTCSS or DCS. 0= NON TONE 1-38 CTCSS 101 – 183 DCS TONE. 5) to select exit 9. Group Changing GROUP Tone. 1). to enter Menu Mode. 2) or to until FILE: IS 400 S ervice manual.doc 2005.11.
E- TECH C o., Ltd 3) 10/16 to select or 4) 5) to select scroll list to select exit 10. Beep on/off 1). to enter Menu Mode. 2) or 3) to until to select 4) or 5) to select on off . to select 11. Key lock 1). to enter Menu Mode. 2) or 3) to until to select 4) or 5) to select key lock /unlock. to select 12. Squelch level 16 level is available. 0 = terminate sq function 1). to enter Menu Mode. FILE: IS 400 S ervice manual.doc 2005.11.
E- TECH C o., Ltd 2) 3) 4) 5) or 11/16 to until to select or to the scroll list to select exit 13. Auto Squelch 1). to enter Menu Mode. 2) or 3) 4) 5) to until to select or to select on /off . to select 14. Scan 1). to enter Menu Mode. 2) or 3) to until to scan. 4) Push PTT for exit 15. DTMF 1). to enter Menu Mode. FILE: IS 400 S ervice manual.doc 2005.11.
E- TECH C o., Ltd 2) or 12/16 to until to select 3) 4) or 5) to select ON /OFF. to select 16. Vox on/off 1). to enter Menu Mode. 2) or 3) to until to select 4) or 5) to select ON /OFF. to select 17. Vox Level 16 level is available.. 1). to enter Menu Mode. 2) or 3) 4) 5) to until to select or to select to scroll list for exit FILE: IS 400 S ervice manual.doc 2005.11.
E- TECH C o., Ltd 13/16 18. Auto Vox 1). to enter Menu Mode. 2) or 3) 4) 5) to until to select or to select ON /OFF. to select 19. Priority Scan 1). to enter Menu Mode. 2) or 3) 4) 5) to until to select or to select ON /OFF. to select 20. Priority scan CH 1). to enter Menu Mode. 2) or 3) 4) to until to select or to scroll list FILE: IS 400 S ervice manual.doc 2005.11.
E- TECH C o., Ltd 5) 14/16 to select for exit 21. Power save 1). to enter Menu Mode. 2) or 3) 4) 5) to until to select or to select ON /OFF. to select 22. Talkaround 1). to enter Menu Mode. 2) or 3) 4) 5) to until to select or to select ON /OFF. to select 23. Password 1). to enter Menu Mode. 2) or to until FILE: IS 400 S ervice manual.doc 2005.11.
E- TECH C o., Ltd 3) to select 4) 5) 15/16 or to select ON /OFF. to select 24. Password CH 1). to enter Menu Mode. 2) or 3) to until to select 4) ---- will display on the LCD( enter old password) or by pushing up and down KEY to change password. by pushing enter KEY to change digit of password. 5) Enter new password by 4 digit. 25. Location Indicate where the radio is located by blinking green light every 7 seconds. 1). to enter Menu Mode.
E- TECH C o., Ltd 5) 16/16 to select 26. Scramble 1). to enter Menu Mode. 2) or 3) 4) 5) to until to select or to select ON /OFF. to select 27. Status call Send 1). to enter Menu Mode. 2) or 3) 4) 5) to until to select or to select ON /OFF. to select 5. Circuit Description. 5-1 Transmitter 1) MIC AMP Circuit Voice signal from the microphone are applied to microphone amplifier U303.
E- TECH C o., Ltd 17/16 2) VCO circuit The transmit frequency is directly generated by the Colpitts oscillation circuit contains Q402,Q403. 3) POWER AMP Signals from Q202, Q206 is supplied through antenna switch Q203,Q204 to a low-pass filter made up and then applied to Antenna Jack. 5-2 Receiver 1) LOWPASS FILTER and Antenna switching circuit. Signals from antenna connector fed to the antenna switching circuit through the low pass filter consisting of L212~214.
