Kenwood KX-W8040 Service Manual

Also see for KX-W8040: Instruction manual Instruction manual

KX-W8040CIRCUIT DESCRIPTIONRECORD/PLAYBACK AMPLIFIER UNIT (X28-2310-10)Parts Description[Qi28D1266(Q,P)|+12VAVReee|G2|2SA999(E,F)|-22VAVRaesakeSeeeee!25C3940AIASOSCCONTROL(A)|428C3940A__|BIASOSCCONTROL(B)fea,<<(OGh|6C:iCiUse/Function Operation/Condition/interchangeabilityRS ae ee eee eeeECHA(A) SOL CONT.ECHA(B) SOL CONT.UICK REV. AMPQ11,122SA933S(Q,R) EVELAMPLIMITTER‘ControlledbyQ5.Sincethelevelamplifieroutputto+5V.ao< > < Be)[7POs 2SC1740S(Q,R)[+12VAVRmomentarily when the power is switched on.| Q25~28 | 2SA933S(Q,R) [PLAYOUTMUTING | ControlledbyQ39ontrolled by Q38_ OFF: B RECFL DRIVER ontrolled by Q42 and Q43ontrolled by IC3 pin 5 OFF: A REControlled by IC3 pin 4 OFF: B REControlled by 1C4 pin12 OFF: AREControlled by IC4 pini3 OFF:BREControlled by IC1 pin 14ontrolled by IC5 pin 4 OFF: High speedontrolled by IC5 pin i3 OFF: Hich speedontrolled by IC1 pins 10 and 11ontrolled by IC4 pins 7 and2 OFF: A NormalA-BIAS CONTROL-BIAS CONTROL-REC MUTING DRIVER-REC MUTING DRIVERLAY OUT MUTING DRIVER|Q40.—S«| DTC124ES _—| A-CPM SPEED CONTROLB-CPM SPEED CONTROLFL, DRIVERDTC124ES -NORMAL BIAS CONTROLDTC124ES -NORMAL BIAS CONTROL ontrolled by IC4 pins 9 and 11 OFF: B NormalCCCCCCCCC.C.CCIGH-DUBB MUTING DRIVER | Controlled by IC3 pin8 OFF: High speed onl-EH BIAS OSC CONTROL __| Controlled by Q35 OFF: A REC-EH BIAS OSC CONTROL _| Controlled by Q36 OFF: B REC-BIAS(HX) CONTROL Controlled by Q35 OFF: A RES-BIAS (HX) CONTROL Controlled by Q36 OFF: B REC-HEAD R/P CONTROL Controlled by IC3 pin7 ON: A REC-HEAD R/P CONTROL Controlled by IC3 pin6 ON: A RECIGH SPEED HEAD EQ Controlled by IC3 pin8 OFF: High speed only-BEQA/B SWControlledbyIC1 pin 13OFF:AplaibaackCiCCCCControlled by IC4 pin5 OFF: Recodimgontrolled by 1C4 pin1 ON:CCRSon!ontrolled by IC4 pin 2 ON: Auto bas recordingontrolled by IC4 pin4 ON: Dolby offontrolled by IC4 pin3 ON: Dolby 3ontrolled by IC4 pin6 ON: Multipbx filter onControlled by IC4 pin5 ON: Dolby jlayback| 56 |DTCI24ES| P-BEQR/P SW|57S|DTC124ES | NOR/CCRS SW| asa |DTC124ES__ | NOR/OSC SW[ass|DTC124ES__| DOLBY ON/OFF SWFa60[| DTC124ES_| DOLBY B/C SWPX ON OFF SWOLBY R/P SW