Outputs band.ĥ-1 PREPARATION BEFORE SERVICING The receiver (IC-PCR100) can be adjusted by sending adjustment data to the RS-232C port via a PC. High: When frequencies from 1.8 to 14.999 MHz are displayed.
High: When frequencies below 1.8 MHz are displayed. Outputs power switch.Ĥ-4-2 OUTPUT EXPANDER IC (1) IC1 (2) IC3 4 - 7 Outputs low-pass filter select signal. Input ports for the CPU system clock oscillator (X6 9.8304 MHz). Ĥ-4 PORT ALLOCATIONS 4-4-1 CPU (IC20) CPU (IC20) - continued 4 - 6 Input port from WFM IC (IC7, pin 7) for the stereo indicator. The generated signal at the VCO 3 (Q34) enters the PLL IC (IC8, pin 13) via the buffer amplifier (Q35), is divided ath. Ĥ - 5 4-2-3 2ND LO LOOP The 2nd LO circuit generates the 2nd LO frequencies, and the signals are applied to the 2nd mixer circuit. The CPU compares these signals, then outputs a control signal. S-METER SQUELCH The S-meter signal is applied to the CPU from the meter amplifier circuit (IC13a) via the SMAD line, and also the S- meter squelch setting level is applied to the CPU.The 10.7 MHz 2nd IF signal from the IF amplifier (Q29) is applied to the 3rd mixer section in the F. The.Ĥ - 2 The 150–349.999 MHz signals from the band switching diode (D16) pass through the high-pass filter (L27–L29, C69–C74) and tunable bandpass filter (D18, 元1–元3), and are then amplified at the RF amplifier (Q9) and pass through another tu.Ĥ - 3 4-1-7 3RD MIXER CIRCUIT The 3rd mixer circuit mixes the 2nd IF signal and 3rd LO sig- nal to produce a 450 kHz 3rd IF signal (except WFM mode). 20 dB to protect the RF amplifier from distortion when excessively strong signals are received.
SECTION 4 CIRCUIT DESCRIPTION 4 - 1 4-1 RECEIVER CIRCUITS 4-1-1 RF ATTENUATOR CIRCUIT The attenuator circuit attenuates the signal strength to approx.
Frequency resolution : 1 kHz (minimum) Ģ - 1 SECTION 2 INSIDE VIEWS ¡MAIN UNIT Bottom view Top view 0.01–1.8 MHz RF filter circuit 1.8–15 MHz RF filter circuit 15–30 MHz RF filter circuit VCO3 circuit Reference oscillator (X5: CR-629 12.8 MHz) VCO1, VCO2 circuits AGC control circ.ģ - 1 SECTION 3 DISASSEMBLY INSTRUCTIONS.Frequency range : *Specifications guaranteed 0.5–1300 MHz only.TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPTION 4 - 1 RECEIVER CIRCUITS. DO NOT force any of the variable components. DO NOT open the receiver until the receiver is discon- nected from its power source. Make sure a problem is internal before disassembling the receiver.
#Ic pcr100 parts manual
SERVICE MANUAL COMMUNICATION RECEIVER FOR COMPUTER iC-pcr100
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