Sony STR-K785 Service Manual page 11

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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:
x = 1 → D1112 or R1198 problem
"ERR[]SD0x"
x = 2 → D1113 problem
x = 3 → D1114 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)
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