Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S159TROUBLE SHOOTING● Checking the AHLT signalChecking the MCU AHLT signalAHLTH MCU (IC1) side IC9 (1 pin)AHLTSNormal voltage3.3VMCU (IC201) side IC9 (2 pin) 3.3VPoints to be checked● Checking the communicationof the main displayChecking the communication waveform of the main displayDCLK R679DENormal voltageThe communication waveform of 3.3VR660 The communication waveform of 3.3VPoints to be checkedIf it appears even when the display is unusual, it is not necessary to perform the above-mentioned check.Perform the following checks.MCU or DDR2 is broken.DATA R661~R678ABLENMThe communication waveform of 3.3VR681 3.3V (Turn the transceiver power ON)● Checking the communicationof the sub displayChecking the communication waveform of the sub displayNormal voltageThe communication waveform of 3.3VThe communication waveform of 3.3VR372 The communication waveform of 3.3VThe communication waveform of 3.3VRESB R304DOTCLK R375Points to be checkedDENDATA CP26~CP31ABLENS R680 3.3V (Turn the transceiver power ON)DCLK has an abnormal.Remove the coaxial cable from CN652, and check the input andoutput waveform of the buffer (IC653).If the waveform of the input side becomes abnormal, MCU (IC1) isbroken.DE and DATA has an abnormal.Remove the flat cable from CN651, and check the input and outputwaveform of the corresponding section of IC651 or IC652 which is abuffer.If the waveform of an input side becomes abnormal, the MCU (IC1) isbroken.[MCU: IC1][MCU: IC1]ABLENM has an abnormal.Remove the flat cable from CN651, and check the MCU side terminalwaveform of R681.[MCU: IC1]If the waveform becomes abnormal, the MCU (IC1) is broken.If parts other than the above are abnormal or normal, there is aproblem other than the BGA parts.Remove the flat cable from CN225, and check the MCU side terminalwaveform of the resistor in which the abnormal value is shown.[MCU: IC201]If the waveform is abnormal, the MCU (IC201) is broken.If the waveform is normal, there is a problem other than the BGAparts.When an abnormalvalue is confirmed.When an abnormalvalue is confirmed.When an abnormalvalue is confirmed.When a normal value is confirmed.When a normal value is confirmed.Replacing Digital Unit■ Digital unit InformationOriginal Digital unitNumberFor Service Digital unitNumberX46-3390-00 X46-3390-01■ Method of confirming “Original Digital unit” and“Service Digital unit”The black marking is attached to the silk print part of theService Digital unit (X46-3390-01).504912VCC(33B)VSSVSSHSYNCVSSRR6RR5VSSRR2RR1VSSGG6GG5VSSGG2GG1VSSBB6BB5VSSBB2BB1VSS0SCKRESBNCDOTCLKVSYNCDENRR7VSSRR4RR3VSSRR0GG7VSSGG4GG3VSSGG0BB7VSSBB4BB3VSSBB0SDICSBVSSVCCVCCDEVSSVSSVSSVSSVSSVSSVSSVSSVSSVSSVSSVCCVCCVSSB5B4B3B2B1B0G5G4G3G2G1219110R212R213R214R216R217R218R220R222R223R224R225R227R232R233R235R237R238R239CN225R241R244R245R246R249X201R250TP302R260R262R265R266R267R269TP315R274R275R277R278R279C94R280R668C95R281R669R282R283CN651R670R671R672R673R674R675R676TP142R677R678R680 R681C278C279L301L302L303L304L305L306L307L308TP365IC201L309TP366IC202TP367IC203TP368TP369L310L311L312L313TP370L314TP371L315TP372L316TP373L317TP374L318TP375L319TP376TP377TP378TP379L320L321L322L323TP380L324TP381L325TP382L326TP383TP384TP385TP386TP387TP388TP389TP390TP391TP392TP393TP394TP395TP396TP397TP398TP399R1023R104R302R303R304CP22L1 R315L2CP26R316CP27CP28CP29CP30CP31CP33CP34CP35CN501R136L13R330R331R332R333R3341R3352R336R337R338R339R340R341R342R344R345CP58C505C506R164R3596R364R365R367R175R372TP228R375TP230 TP231TP232C343TP233C344TP234R398R975L201L202R987R988C181C182TP266C183C184C1856TP272TP273C384C385C386C388C389TP662TP663TP664TP665TP666TP667TP668TP669TP282CN2TP284 TP670TP671TP672TP673R98TP683TP684TP685P2R204R2081 8V 41.8V_11.8V_11.2V_31.2V_31.2V_3DGNDDGNDDGNDU1VBUSU1D+U1D-U1SGNDU1GNDU2VBUSU2D+U2D-U2SGNDU2GNDX46-3390-00J79-0353-29