User manual ICOM IC-22S

[. . . ] DO NOT apply an RF signal of more than 20 dBm (100 mW) to the antenna connector. This could damage the transceiver's front end. To upgrade quality, any electrical or mechanical parts and internal circuits are subject to change without notice or obligation. ORDERING PARTS Be sure to include the following four points when ordering replacement parts: 1. Quantity required <SAMPLE ORDER> 1130008350 S. IC LV2105V IC-22S MAIN UNIT Cover 5 pieces 10 pieces 8810009610 Screw FH M2. 6×6 ZK IC-22S REPAIR NOTES 1. [. . . ] The "REFMOD" signal is applied to the amplifier (IC521, pin 3), and passes through the CTCSS switch (IC524, pins 6 and 1). The signal is applied to the D/A convertor (MAIN unit; IC5, pin 13) via the "CTCSS" line. The output signal from the D/A convertor (MAIN unit; IC5, pin 14) is applied to the reference oscillator (MAIN unit; X1) to control the reference frequency while transmitting digital signals as "DTC" line. 4-5 PORT ALLOCATIONS 4-5-1 D/A CONVERTER IC (MAIN UNIT; IC5) Pin number 2 3 10 11 14 15 Port name T3 Description Outputs RF tracking voltage while receiving. SQLATT Outputs attenuator control signal. FC SQLIN DTC MOD T2 Outputs reference frequency control voltage. Outputs squelch control signal to adjust threshold level. Outputs transmitting deviation control signal. Outputs RF tracking voltage while receiving. · Outputs RF tracking voltage while receiving. · Outputs transmitting power control signal while transmitting. 4-4 POWER SUPPLY CIRCUITS VOLTAGE LINES Line HV Description The 13. 8 V voltage from the connected DC power supply. The same voltage as the HV line which is controlled by the HVSW circuit (Q28, Q30, Q31). When the [POWER] switch (LOGIC unit; S1) is pushed, the CPU (LOGIC unit; IC1, pin 40) outputs the "PWRON" control signal to the power switching circuit to turn the circuit ON. Input port for the noise pulse signal for squelch and CPU. Pin number 53­55 56, 57 58­61 62 Port name IS0­IS2 Description Output initial matrix strobe signals. KS1, KS2 Output key scan signals KR3­KR0 PTT Input ports for the keyboard matrix signals. Outputs digital/analog select signal while the UT-115 is installed. High : Digital is selected. 64 DI_SEC 65 Outputs filter characteristic control signal while the UT-115 is installed. TX_DIGI Low : While transmitting digital signal. · Outputs serial data to D/A convertor (MAIN unit; IC5, pin 8). · Outputs DTMF clock signal to the expander IC (MAIN unit; IC2, pin 2). Outputs clock signal to the optional unit. · Input port for the optional unit detecting signal. · Outputs strobe signal to the D/A converter (MAIN unit; IC5, pin 6). Input port for the optional unit detecting signal. 66 SO 8 9 10 14 19 25 26 28 29 30 31 34 35 40 COLOR DIM0 DIM1 CSHIFT RESET PWRSW NOIS DICK DIUD CLIN CLOUT SCK BUSY 67 OPSCK 68 OPV1 DASTB 69 OPV2 73 Input ports for encoder signals. Outputs serial clock signal to the D/A convertor (MAIN unit; IC5, pin 7). [. . . ] [dE+DIGITAL] · Connect an FM deviation meter to the antenna connector and set as : HPF : OFF LPF : 20 kHz De-emphasis : OFF Detector : (P­P)/2 · Transmitting : 146. 0 MHz DTCS WAVE 1 · Operating frequency · IF bandwidth : Wide FORM · No audio signal is applied to the [MIC] jack. [dt] · DTCS code : 023 · Set an FM deviation meter as: HPF : OFF LPF : 20 kHz De-emphasis : OFF Detector : (P­P)/2 · Transmitting · Turn the [DIAL] to set to flat wave form as shown below. · Push the [S. MW] key after finish adjustment. Set to flat wave form 5-3 SOFTWARE ADJUSTMENTS (TRANSMITTING AND RECEIVING)­Continued ADJUSTMENT ADJUSTMENT CONDITION OPERATION · Turn the [DIAL] to set to ±0. 85 kHz. : 146. 0 MHz 1 · Operating frequency DIGITAL · Push the [S. MW] key after finish adjustment. [. . . ]