Sony STR-K900 Service Manual - Page 13

Vacs Control, Swap All Mode, Dcac Factory Test Mode - 5 1 receiver

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VACS CONTROL Procedure: 1. While depressing the TUNING MODE and the MUSIC buttons simultaneously, press the power ?/1 button to turn on the main power. 2. "VACS OFF" appears. (10 second) SWAP ALL MODE Procedure: 1. While depressing the SPEAKERS (OFF/A/B/A+B) and the A.F.D. buttons simultaneously, press the power ?/1 button to turn on the main power. 2. "SWP.ALL" appears. (No change while displayed.) DCAC FACTORY TEST MODE DCAC Factory Test mode have two stages: 1. DCAC DSP Data Line Checking 2. DCAC AUTO CAL MIC board Checking Start DSP Data Line Pass Check Auto Cal Mic Check Pass END Factory Test System Setup Receiver DCAC MIC SPK Front Left 1. When power off : Press the three buttons TUNING + + MOVIE + ?/1 . "DCAC[]FTM" appears. Afterward, press the TUNING MODE to start DCAC factory test mode. 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, 4 If there is error happen, below display will show: "ERR[]SD0x" x = 1 → D1501 or R1530 or C1512 problem x = 2 → D1502 problem x = 3 → D1503 problem x = 4 → D1504 problem 2. DCAC AUTO CAL MIC 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-K880/K900 13

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13
STR-K880/K900
VACS CONTROL
Procedure:
1.
While depressing the
TUNING MODE
and the
MUSIC
buttons simultaneously, press the power
?/1
button to turn
on the main power.
2.
“VACS OFF” appears. (10 second)
SWAP ALL MODE
Procedure:
1.
While depressing the
SPEAKERS (OFF/A/B/A+B)
and the
A.F.D.
buttons simultaneously, press the power
?/1
button
to turn on the main power.
2.
“SWP.ALL” appears. (No change while displayed.)
DCAC FACTORY TEST MODE
DCAC Factory Test mode have two stages:
1.
DCAC DSP Data Line Checking
2.
DCAC AUTO CAL MIC board Checking
Factory Test System Setup
1.
When power off :
Press the three buttons
TUNING +
+
MOVIE
+
?/1
.
“DCAC
[]
FTM” appears.
Afterward, press the
TUNING MODE
to start DCAC factory
test mode.
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, 4
If there is error happen, below display will show:
“ERR
[]
SD0x”
x = 1
→
D1501 or R1530 or C1512 problem
x = 2
→
D1502 problem
x = 3
→
D1503 problem
x = 4
→
D1504 problem
2.DCAC AUTO CAL MIC 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)
DSP Data Line
Check
Start
Pass
Pass
Auto Cal Mic
Check
END
SPK Front Left
DCAC MIC
Receiver