Pioneer SC-37 Service Manual page 70

1
QQ
3 7 63 1515 0
[2] Protection Circuit Process List (XVDDERR)
A Item Purpose
USB/XM Detection of failure
power in regulator circuit
failure for USB/XM
detection external supply
B
XVDDERR Circuit
C
TE
L 13942296513
D
LSC4081UB(QR)
E
www
F
70
1
http://www.xiaoyu163.com
2
Detection Method
Detected when USB(XM)
voltage reaches 7V or
higher, or 4.1V or lower
and XVDDERR port is
set to "L"
CN601
-25
R794
10k
Q608
GNDD
x ao
y
. i
2
http://www.xiaoyu163.com
3
8
Status of Equipment Warning Indication
Shuts down Blinks PQLS
K
DISPLAY ASSY
V+5_EV
CN3001
-15
70
GNDU
Q Q
3 6 7 1 3
F
DIGITAL MAIN ASSY
D607
D602
HZU5R6(B2)
R653 1SS352
2.2k
D603
1SS352
V+5R6_EV
D604
1SS352
R784
D606
D605
10k 1SS352
1SS352
u163
.
SC-37
3
4
2 9 9 4 2 8
Remarks
Restoration
possible with
Power ON
UCOM
IC3001
1 5 0 5 8 2 9 9 4
V+5_USB
V+5_XM
m
co
4
9 9
2 8 9 9