1060VR/1070VR/KR-V8090/KR-V909015CIRCUIT DESCRIPTION3 Test tone operationWhile displaying as follows every time it pressesDIRECT key when dolby surround is working, itswitches a speaker and TEST-TONE is output.By pressing DIRECT key, this work and dolbysurround can be canceled.4 Mute signal outputBecause the analog mute always becomes OFFcondition, it isn’t possible to control absolutely.however, when the value with front volume is theminimum, it becomes an analog mute ON condition.5 AC-3 The 6ch input changing.(Only KR-V9090)When the selector of KR-V9090 is VIDEO2, press"AUTO/MANU" key. At this time, KR-V9090 becomes"AC3 6ch input" condition. (M-INPUT is lighted)."AC3 6ch input" condition is able to cancel bypressing "AUTO/MANU" key. (It become usualfunction).6 The ADAPTER input changing.Press the "BAND" key of KR-V9090. At this time, KR-V9090 changes to ADAPTER input. When "BAND"key is pushed again, it is able to cancel it.7 TONE BASS/TREBLEWhen KR-V9090 is doing the function of the testmode, the TONE BASS/TREBLEv94. che, KR-