Sony HT-XT100 Service Manual page 5

ABOUT PARTS REPAIR OF EACH BOARDS
When each boards installed in this unit are defective, individual
electrical parts that the mount is done cannot be replaced. When
each boards are defective, replace the mounted board or the whole
parts including an applicable board.
Printed wiring board and schematic diagram that have been de-
scribed on this service manual are for reference.
NOTE OF REPLACING THE BT NFC BOARD OR THE
NFC MODULE
When replacing the BT NFC board or the NFC module, be sure to
replace both at the same time.
The BT NFC board or the NFC module cannot replace with single.
WHAT TO DO IF PRTCT IS DISPLAYED
If the "PRTCT" (represents the "PROTECT") is displayed on the
screen display panel, AMP temperature protection circuit or USB
charging current protection circuit is working.
In this case, there is a possibility that the MAIN board or the USB
board is defective. Be sure to replace the MAIN board and the
USB board at the same time.
METHOD OF RESET
If the system still does not operate
properly, reset the system as follows:
1
While holding down the @/1 (on/
standby) button on the system,
hold down the INPUT and
VOL (volume) – buttons
simultaneously for 5 seconds.
[RESET] appears on the display, and
the settings of the menu and sound
fields, etc. return to their initial
status.
2
Disconnect the AC power cord
(mains lead).
HT-XT100
5