Sony STR-K790 Service Manual - Page 11
Dcac Factory Test Mode - speaker setup
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DCAC FACTORY TEST MODE DCAC Factory Test mode have two stages: 1. DCAC DSP Data Line Checking 2. DCAC board Checking Start DSP Data Line Pass Check Auto Cal Mic Pass Check END Factory Test System Setup Receiver DCAC MIC SPK Front Left 1. When power off : Press the three buttons MUSIC + DISPLAY + ?/1 . "DCAC[]FTM" appears. Afterward, press the DIMMER to start DCAC factory test mode. 1. DCAC DSP Data Line Checking After press the DIMMER , DCAC Factory test mode will start, below display will show: "DCAC[][][]x" x = 1, 2, 3 If there is error happen, below display will show: "ERR[]SD0x" x = 1 → D1501 or R1530 x = 2 → D1502 problem x = 3 → D1503 problem 2. DCAC board Checking Connect front left speaker of the receiver and AUTO CAL microphone. Turn MASTER VOLUME jog, there will be test tone sound output from front left speaker, and the display will change accordingly. "AD[]-[]xxx" xxx = 0 to 255 (depends on loudness of test tone) STR-K790 11