Kenwood TS-990S Service Manual
Also see for SP-990: Instruction manual
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TS-990S238LEVEL DIAGRAMQ10Q11PSELAMP–113dBm–119dBm–110dBmCN11BPFIANT1 CN1MRAT14.001MHz 8.248MHzRX UNIT (X55-313 A/2)SUB BANDMAIN BANDMeasurement conditionFrequency: 14.0MHzPRE AMP: ONANT input: –113dBm/0dBμAF output: 0.63V/8 1kHzMode: USBThe values in parentheses ( ) are those in FM modeFilter Lo: 200 / Hi: 2800Receiver SectionRFBPFCN13BPFO–110dBm –109dBmBPF UNIT(X55-313 B/2)PRESEL UNIT(X42-343 B/10)CN26PREI CN53PREO–109dBm –109dBmQ25Q26PREAMP–106dBmL55L59L601st MixDIPLEXERL121L122–120dBmAMPQ46L77–110dBmD26D27D28D29NBG L79–111dBmIFFILXF3XF4XF5XF6XF8L108AT–111dBm–114.5dBm–78dBmQQQ70IC7 IC8–113dBm–116dBmANT1 CN200SRATQ351 Q353Q352 Q354–104dBm –110dBm –96dBm –92.5dBm ––107dBm –101dBm –95dBm –102.5dBm –78.5dBm –73dBmL356 L359XF351 Q481 Q492Q493D481D482D483D484ATTQ401 Q403Q406 Q409[–109dBm] [–108dBm] [–112dBm][–111dBm] [–111dBm][–97dBm] [–101dBm]L403 L406 L423L424D405D406XF401 AMPQ494Q495D50XF485XF486XF481XF482XF48410.695MHz73.095MHzRFBPF Q219–117dBmPREAMP1st MIX1st MIXQ491AGC14.001MHz 11.374MHzTX-RX UNIT (X57-827 A/2)Measurement conditionFrequency: 14.0MHzPRE AMP: ONANT input: –113dBm/0dBμAF output: 0.63V/8 1kHzMode: USBThe values in parentheses ( ) arethose in FM modeFilter Lo: 200 / Hi: 2800ANT: ANT1SUB: ON(The signal which passed the MAIN/SUB distributor.)2nd MIXAMP NBG IFFIL AMP ATANT: ANT1SUB: OFFPSEL: OFFAGCInput –113dBm from the antenna, set AF VOLUME so that AF output is 0.63Vrms, and measure the signaThe AF section is measured with an oscilloscope and the other parts are measured with a Spectrum AnalyThe values in parentheses [ ] are those in RX2 (IF1: 73.095MHz)Filter Lo: 200 / Hi 3000MIC D707 Q705IC6835mVrms 85mVp-pAF 1kHzDSP UNIT (X53-453) TX-RX UNIT (X57-827 A/2)TIF 24kHz 10.695MHz 73.095MHz560mVp-p 1.1Vp-p420mVp-p 180mVp-p350mVp-p 250mVp-p 150mVp-p 2.8V72mVp-pIC674 IC666 ADCIC398IC202 IC397 IC679IC66825 11DSPIC701 Q702 XF482 Q7034 5L419L424 L423D405D406Transmitter SectionMeasurement conditionFrequency: 14.0MHzMode: USBMIC input: 1kHz/5mVOutput power: 100WMIC level: ALC zone maximumAudio frequency section is measured by the AF voltmeter or oscilloscope.Radio frequency section is measured by high impedance RF voltmeter.Input –113dBm from the antenna, set AF VOLUME so that AF output is 0.63Vrms, and measure the signaThe AF section is measured with an oscilloscope and the other parts are measured with a Spectrum AnalyReceiver SectionTransmitter Section |
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