Kenwood TH-K4AT Service Manual

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TH-K4AT/K4E37ADJUSTMENTItem Condition Measurement Adjustment Specifications/Test equipment Unit Terminal Unit Parts Method RemarksSwitch to Adjustment modeand carry out the operationsfor adjustment item D.(Refer to page 29)S-meter 3) LCD display: S1 SSG TX-RX ANT [MENU] WriteFrequency: 435.050MHz (A/3)SSG: –120dBm (0.22uV)4) LCD display: S9 [MENU] WriteFrequency: 435.050MHzSSG: –105dBm (1.26uV)4.Squelch Squelch level: 1Check 1) Frequency: 435.050MHz SSG Check Open SquelchSSG output: –123dBm (0.158uV) OscilloscopeSSG MOD: 1kHz Distortion meterSSG DEV: 3kHz2) SSG: OFF Close Squelch5.S-meter 1) Frequency: 435.050MHz SSG Check Two segmentsCheck SSG output: –120dBm (0.22uV) in S-meter light.■■2) SSG output: –105dBm (1.26uV) All segments inS-meter light.■■■■■■■■■6.Hum and 1) Frequency: 435.050MHz SSG TX-RX ANTnoise ratio SSG output: –53dBm (501uV) Oscilloscope (A/3) SPCheck SSG MOD: 1kHz Distortion meterSSG DEV: 3kHz AF V.MAF Output: 0.63V/8ΩAF V.M = 0dB2) SSG DEV: OFF Check –38dB or less7. AF distortion 1) Frequency: 435.050MHz Check 5% or lessCheck SSG output: –53dBm (501uV)SSG MOD: 1kHzSSG DEV: 3kHzAF Output: 0.63V/8Ω8.AF output 1) Frequency: 435.050MHz Check 400mW or moreCheck SSG output: –53dBm (501uV)SSG MOD: 1kHzSSG DEV: 3kHzAF distortion: 10%9.Current Squelch level: 5Drain 1) Frequency: 435.050MHz SSG Check 80mA or lessCheck SSG output: OFF Am meter2) Frequency: 435.050MHz 400mA or lessSSG output: –53dBm (501uV)SSG MOD: 1kHzSSG DEV: 3kHzVOL knob: Max