ID-880H/E880 SERVICE MANUAL

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• CONTROL UNITBACKLIGHT DRIVER(Q1)+5C REGULATOR(Q16)LCD CONTRAST ADJUSTER(Q15)LCD DRIVER(IC7)RESET IC(IC2)CPU CLOCK (9.8304 MHz)(X1)FRONT CPU(IC4)+5V REGULATOR(IC8)2 - 2
SECTION 3.DISASSEMBLY INSTRUCTION1. REMOVING TOP AND BOTTOM COVERS1) Unscrew total of 18 screws; 4 screws from the top cover,8 screws from the both sides and 4 screws from thebottom cover.2) Remove the top cover and bottom cover as illustratedbelow.2. REMOVING THE MAIN UNIT (continued)3) Unscrew 10 screws from the MAIN UNIT.4) Unscrew 4 screws from the chassis.5) Disconnect the cooling fan cable from the MAIN UNIT.6) Unsolder total of 4 points, and take off the MAIN UNIT.UNSOLDERCOOLINGFAN CABLETop coverSolderremoverMAIN UNITScrew x4Screw x10Bottom cover3. DISASSEMBLE THE CONTROL UNIT1) Remove 3 knobs from the front panel.2. REMOVING THE MAIN UNIT1) Remove the IC clip from the chassis.2) Disconnect the speaker cable from the MAIN UNIT, andremove the speaker from the chassis.SPEAKERCABLEKnobsFront panelIC clip2) Unscrew 4 screws from the rear panel.3) Remove the LCD plate.4) Take off the CONTROL UNIT from the front panel.Screw x4Rear panelSpeakerCONTROL UNITLCD plate(Continued to right above.)Front panel3 - 1
Page 1 and 2: VHF/UHF DIGITAL TRANSCEIVERS-14529X
Page 3 and 4: TABLE OF CONTENTSSECTION 1 SPECIFIC
Page 5: SECTION 2.INSIDE VIEWS• MAIN UNIT
Page 9 and 10: 1st IF CIRCUITS144 MHz BAND (118-17
Page 11 and 12: 4-2 TRANSMITTER CIRCUITSTX AF CIRCU
Page 13 and 14: 4-3 FREQUENCY SYNTHESIZERVCOsVHF VC
Page 15 and 16: 4-5 VOLTAGE BLOCK DIAGRAMVoltage fr
Page 17 and 18: M CONNECTIONOscilloscopeStandard si
Page 19 and 20: 5-3 ANALOG DEVIATION ADJUSTMENTS (V
Page 21 and 22: 5-5 DIGITAL DEVIATION ADJUSTMENTSel
Page 23 and 24: 5-7 S-METER ADJUSTMENT1) Select an
Page 25 and 26: SECTION 6.PARTS LIST[CONTROL UNIT]R
Page 27 and 28: [MAIN UNIT]REF PARTSH/VNO. NO.DESCR
Page 35 and 36: SECTION 7.MECHANICAL PARTS[CHASSIS
Page 37 and 38: • MAIN UNITMP15×4(C)MP21(C)MP3(C
Page 40 and 41: 9 - 1SECTION 9.BLOCK DIAGRAMMICMUT
Page 43: 10 - 2MAIN UNIT (1/7)*; Refer to
Page 48 and 49: 10 - 7UHFYGR0.001C385470R9147PC5271
Page 50 and 51: 1-1-32, Kamiminami, Hi r ano-ku, Os

ID-880H/E880 SERVICE MANUAL

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