Pioneer VSX-1019AH-K Service Manual page 45

5
QQ
3 7 63 1515 0
[2] Protection Circuit Process List (XPROTECT)
Item
AMP power supply circuit, Fan
failure detection circuit and
Transformer short circuit
XPROTECT
detect.(defect status)
-Observe the voltage of
+VPRE and -VPRE.
-Observe the voltage of
Fan Stop.
-Observe the voltage of
REGB+ and REGB-
XPROTECT Circuit
R
V6 DISPLAY ASSY
W
TRANS 3 ASSY
TE
L 13942296513
www
.
5
http://www.xiaoyu163.com
6
Purpose Detection Method
Detects when the XPROTECT
port becomes "L".
(Pin 83 of IC3004)
D
DIGITAL MAIN
ASSY
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i
6
http://www.xiaoyu163.com
7
2 9
8
Process
Turns muting on and
speaker relay off, and
immediately turns off the
power. Then flashes
POWER LED.
C
COMPONENT
ASSY
Q Q
3 6 7 1 3 1 5
co
.
VSX-1019AH-K
7
8
9 4 2 8
Warning Indication Remarks
Once detected and turned
the power off.
None
E
0 5 8 2 9 9 4 2 8
POWER PACK ASSY
m
8
9 9
A
B
C
9 9
D
E
F
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