ICF-C1200 TABLE OF CONTENTS Specifications ................1 Notes on chip component replacement • Never reuse a disconnected chip component. 1. GENERAL • Notice that the minus side of a tantalum capacitor may be ..............2 damaged by heat. 2. DISASSEMBLY 2-1.
ICF-C1200 SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-1. MAIN BOARD 2 Screws (1.4X6 tapping) 5 Claw ANT101 Cabinet (rear) ASSY 4 Screws (1.4) 5 Claw 5 Claw S301 • Caution during assembly Align the hold switch(S301) to the knob(HOLD).
ICF-C1200 SECTION 3 ELECTRICAL ADJUSTMENTS FM FREQUENCY COVERAGE CONFIRMATION 3-1.TUNER SECTION Adjust part Frequency display reading on digital voltmeter AM Section 0dB=1µV Confirmation 87.5MHz 3.0 to 4.0V Confirmation 108MHz 9.5 to 10.5V BAND button : AM Volume : MIN FM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter.
ICF-C1200 VCO Adjustment Procedure : FM RF signal telescopic generator antenna terminal µ 0.01 F Carrier frequency : 98MHz Modulation : No modulation Output level : 1.38mV (–55dB) 1. Connect the frequency counter to TP (76k) and TP (3V) as shown the figure below.
ICF-C1200 4-5. SCHEMATIC DIAGRAM Refer to page 11 for Notes. Refer to page 11 for IC Block Diagrams. Refer to page 11 for Waveforms.
ICF-C1200 Note on Schematic Diagram: MAIN SECTION Waveforms • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and W or less unless otherwise specified.
ICF-C1200 • IC BLOCK DIAGRAMS IC101 CX1238N-T4 28 27 26 25 24 23 22 21 FM FRONT-END AM FRONT-END FM IF/ MPX REG. DISCRI IF/DET COUNTER TUNING COUNTER INDICATOR AUTOBLEND MONO/ST MUTING SELECT BAND PASS MUTE RIPPLE DECODER AMP FILTER...
ICF-C1200 SECTION 5 EXPLODED VIEWS NOTE : • -XX, -X mean standardized parts, so they • The mechanical parts with no reference may have some difference from the original number in the exploded views are not one. supplied. • Items marked “ * ”are not stocked since they •...
ICF-C1200 SECTION 6 MAIN ELECTRICAL PARTS LIST NOTE : • Due to standardization, replacements in the • SEMICONDUCTORS In each case, u : µ , for example : parts list may be different from the parts uA..: µ A.., uPA..: µ PA..
ICF-C1200 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision...