Sony STR-K990 Service Manual page 12

STR-K990
QQ
3 7 63 1515 0
1. DCAC DSP Data Line Checking
After press the TUNING MODE , 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 → D1501 or R1530
"ERR[]SD0x"
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)
VACS CONTROL
The VACS feature of the amplifier is turned off purposely.
Procedure:
1. While depressing the MEMORY/ENTER and the 2CH
buttons simultaneously, press the power ?/1 button to turn
on the main power.
2. "VACS OFF" appears. (8 second)
AM CHANNEL STEP 9 kHz/10 kHz
SELECTION MODE
• Either the 9 kHz step or 10 kHz step can be selected for the
TE
AM channel step.
L 13942296513
• Procedure:
Set the FUNCTION to AM. Turn off the main power.
While depressing the TUNING MODE button, press the
power ?/1 button to turn on the main power. Either the
message "9 k STEP" or "10 k STEP" appears. Select the
desired step.
www
.
12
http://www.xiaoyu163.com
x ao u163
y
i
http://www.xiaoyu163.com
2 9
8
Q Q
3 6 7 1 3 1 5
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9