Kenwood TH-22A Service Manual

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TH-22A/AT/E42ADJUSTMENTMeasurement AdjustmentItem Condition Test- Specifications/Remarkslequipm Unit | Terminal} Unit | Parts Method4. DTMF 1) AG output: OFF Power TX-RX | ANT Check DEV 2,7 to 4.0 kHzdeviation Frequency: 144.975MHz meter MIC(KEY type only) D key: Push LinearPTT: ON detector5. TONE 1) Frequency: 144.975MHz Oscitlo- Check Display | Display “T” on.deviation T/CT key: Push ra Check DEV DEV: 0.5 to 1.25kHz(88.5 Hz) PTT: ON AFVMRX AdjustmentMeasurement AdjustmentItem Condition Test | Specifications/Remarksequipment Unit |Terminal} Unit | Parts Method1. BPF 1) Frequency: 145.975MHz Traking | TX-RX | ANT RF/IF | Lit Align to set theTracking generator output generator TP Li2 waveform of:-40dBm_ | Spectrum L13 spectrumConnect the spectrum analyzer analyzer to Fig.analyzer to TP. 2,2. Sensitivity 1) Frequency: 144.05MHz $8G TX-RX | ANT Check SINAD 12dB or more.SSG output: -122dBm Oszillo- SP(0.178 pV) scopeMOD: 1kHz AFV.MDEV: +3kHz DistortionAF VR: 0.63V/80 meter2) Frequency: 147.950MHZz:K,P,X,M1,M2,M3,M4,E2145 950MHz: M5,T,E1,E3.E4,E93. Squelch 1) Push F key, then push MONI [SSG TX-RX | ANT RF/IF Checkkey. Oscillo- SPTurn the encoder to display scope"SqLl3". AFV.M2) Frequency: 146.05MHz: K,P,x, VR2 Adjust whereM1,M2,M3,M4,E2 noise145.05MHz: M5,T, disappear.E1,E3,€4,E9SSG output: -132dBm(0.06uV)MOD: 1kHzDEV: +3kHzAE VR: 0.63V/8Q.3) SSG output: -127dBm Check Squelch should be open.(O.1pV)4. S-meter ievel |.1) Frequency: 146.05MHz: K,P,X, |SSG TX-RX | ANT Check Display “AbCdE”M1,M2,M3,M4,E2 SP (After POWER145.05MHz: M5,T, is ON, remove£1,E3,E4,E9 the short)While shorting the SM terminalof the control section, set thePOWER: ON.2) SSG output: -120dBm Push MONI key| Beep sounds.(0.22uV)3) SSG output: -111dBm Push LAMP Beep sounds.(0.63nV) key.4) Power: OFF5) Power: ON ‘ Check S-meter | ist segment is turnedSSG output: -120dBm+3dBm on.(0.22uV) Li6) SSG output: -111dBm+3dBm All segments are turned(0.63pV) on.BE RES REED