Kenwood TS-990S Service Manual
Also see for SP-990: Instruction manual
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TS-990S39CIRCUIT DESCRIPTIONIC6Panel MCUVcc1: 5VVcc2: 3.3VKey matrixtact SW 109To MIC PCBX42-343 C/10Q303-Q308Touch panelcircuitEncoder 5IC307,308Main/Sub LCDbacklight driverIC303,304,305,306AND gateTo Control unitX53-452To Digital unitX46-339X111.0592MHzIC9,10,11VR 11LED 50 IC7Shift register13.8VMain display(7inch)&Touch panelSub display(3.5inch)KI0-KI13KO0-KO7KEYO0-KEYO7PA_Y+/PA_X+PA_Y /PA_XABLENMABLENSPATXDAnode/CathodeMU/MDThe location electric potentialPRST/BKC/PATXD/PRXD/PTXD/PCTS/PRTS/PFPRGMLPWM/MLSYNCSLPWM/SLSYNCMPI1/MPI2/MPI3MPRE1/MPRE2/MPRE3RGB DATATiming signalSRENA/SRDATA/SRCLKLEDBRLED drive signalQ4Power supply controlEncoder pulseVR voltageMBLENPBLENLED power supplyTP_X1/TP_X2TP_Y1/TP_X2TPPUON/TPPRES8ch MultiplexerFig. 45 Display circuit |
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