Pioneer SC-82 Service Manual page 42

1
[2] Protection Circuit Process List (XVDDERR)
Item Purpose
USB Detection of failure
A
power in regulator circuit
failure for external supply
detection
XVDDERR Circuit
B
C
FRONT HDMI USB ASSY
C
D
E
F
42
1
2
Detection Method
Detected when USB
voltage reaches 7V or
higher.
XVDDERR port is set to
"L". (IC6001 22pin)
V+5_USB_DC
V+5_HD
CN8002
Q8004
2SC4081(QRS)
GNDCH
2
3
Status of Equipment Warning Indication
Shuts down Blinks iPod iPhone
LED
K
DISPLAY ASSY
CN6003
-4
-4
R6214
22
SC-82
3
4
Remarks
Restoration
possible with
Power ON
UCOM
IC6001
R6222 R6087
22
10 10
GNDD
4