Kenwood TK-3148 Service Manual

Also see for TK-3148: Service manual

Contents

TK-314840ADJUSTMENTCommon SectionItem ConditionMeasurement AdjustmentSpecifications / RemarksTest-equipment Unit Terminal Unit Parts Method1. Setting 1) BATT terminal voltage: 7.5V2) SSG Standard modulation[Wide]MOD: 1kHz, DEV: 3kHz[Narrow]MOD: 1kHz, DEV: 1.5kHz2. VCO lockvoltage• RX[Panel Test Mode]1) CH-Sig: 3-1PowermeterDVMPanelTX-RXANTCVTX-RX TC2 4.0V ±0.1V2) CH-Sig: 2-1 Check 0.6V or more• TX 3) CH-Sig: 3-1PTT: ONTX-RX TC1 4.0V ±0.1V4) CH-Sig: 2-1PTT: ONCheck 0.6V or moreTransmitter Section (Panel tuning mode except when Panel test mode is specified)Item ConditionMeasurement AdjustmentSpecifications / RemarksTest-equipment Unit Terminal Unit Parts Method1. FrequencyAdjust1) Adj item [FREQ]Adjust [***]PTT: ONf. counterPowermeterAmmeterPanel ANT Panel EncoderknobCenter frequency ±100HzNote: After replacing theTCXO (X1), align using KPG-74D CPS.2. Hight PowerAdjust1) Adj item [HPOW]Adjust [***]2) Adj item[L HPOW] → [L2 HPOW] →[C HPOW] → [H2 HPOW] →[H HPOW]Adjust [***]PTT: ON4.0W ±0.1W1.9A or less3. Hight PowerCheck[Panel Test Mode]1) CH-Sig: 1-1PTT: ONCheck 3.7~4.3W1.9A or less2) CH-Sig: 2-1PTT: ON3) CH-Sig: 3-1PTT: ON4. Low PowerAdjust1) Adj item [LPOW]Adjust [***]2) Adj item[L LPOW] → [L2 LPOW] →[C LPOW] → [H2 LPOW] →[H LPOW]Adjust [***]PTT: ONPanel Encoderknob1.0W ±0.05W1.0A or less5. Low PowerCheck[Panel Test Mode]1) CH-Sig: 1-1Set low power (Push [C])PTT: ONCheck 0.5~1.5W1.0A or less2) CH-Sig: 2-1PTT: ON3) CH-Sig: 3-1PTT: ON