Usb Check Mode - Pioneer DVR-555HX-S Service Manual

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6.9 USB CHECK MODE

[Purposes]
As this unit is provided with two USB
A
ports, operation checks of these ports
are possible by connecting them (loop
connection).
[How to enter this mode]
1. Connect Connector A (at the front panel) and Connector B (at the front panel), using a USB cable.
2. Enter USB Check mode.
B
Press the ESC key on the remote control unit for servicing then press the TIMER REC key on the remote control unit
supplied with this unit.
[How to quit]
To quit while the ports are operating properly ("USB CHK OK" is lit.): Press the ESC key or the clear key.
To quit while port operation is abnormal: Turn the power off then back on.
[Procedures]
1. Check the indication on the FL display.
When the two ports are operating properly: "USB CHK OK" is lit.
When port operation is abnormal: "USB CHK NG" is lit.
2. When "USB CHK OK" is lit in Step 1, disconnect the USB cable in order to perform the
C
detachment/attachment test.
The indication on the FL display will change, as follows:
If the result is OK: "USB CHK OK" will flash.
If the result is not OK: "USB CHK OK" will remain lit.
[Troubleshooting]
Enter USB Check mode.
D
"USB CHK OK"
is lit on the FL
display.
No
"USB CHK NG" is lit on the
FL display, indicating port
operation is abnormal.
No
E
Is the USB cable OK?
(Perform USB checking, using
another USB cable.)
No
The USB cable is
defective.
F
66
1
2
[Tools to be used]
USB cable
(GGD1445)
Yes
Yes
"USB CHK OK" remains lit,
indicating that the result of the
detachment/attachment test is not OK.
Possibility of contact between USB connectors A (at the front panel) and B (at the front panel).
Possibility of breakage of the internal flexible cables that connect USB connector A (at the front
panel) and B (at the front panel) with the control circuitry on the MAIN Assy.
EMMA2RFEX on the MAIN Assy is in failure.
DVR-LX60D
2
3
STANDBY/ON HDD/DVD
PREV PAUSE STOP NEXT
PLAY
HELP REC INFO
TOP MENU
HOME MENU
DISC GUIDE
NAVIGATOR
CHANNEL CM BACK
+
ENTER
–
CHANNEL CM SKIP
A.TV/D.TV RETURN/EXIT
OPEN
Remote control unit
supplied with the unit
(VXX3221)
Disconnect the USB cable.
Yes
"USB CHK OK" flashes.
No
3
4
Remote control unit for servicing
(GGF1381)
USB-port test: OK
4