Note On Service; Error Message; Circuit Protection Device - Sony WLL-RX55 Maintenance Manual

1-19. Note on Service

1-19-1. Error Message

If an error is generated, the error message is displayed on
the EL display.
For details on the error message, refer to the operation
manual of this unit.

1-19-2. Circuit Protection Device

The following boards are provided with positive ther-
mistors for power line to protect circuits. This device limits
a current by steeply increasing the inner resistance when
the device rises to a certain temperature due to overcurrent
or high ambient temperature. If the device is activates
once, turn off the power and check an equipment con-
cerned; the circuits in this unit or the other equipment
connected to the DC-IN connector of the unit. After the
cause is eliminated and the device cools off, turn on the
power again. If there is no trouble, the unit will operate
normally. It takes about one minute for the device to cool
off after powering off the unit.
AU-297 Board
Ref. No. Address Equipment protected
THP701 J4 Circuits in this unit
THP702 J4
THP703 J3
THP704 H2
THP705 H2
THP706 J3
THP707 H2
DEC-146 Board
Ref. No. Address Equipment protected
*
THP1 J3 Circuits in this unit
THP3 H2 *
*
THP6 G2
*: B SIDE
PS-667 Board
Ref. No. Address Equipment protected
THP201 E4 * Equipment connected to DC IN
THP202 A3 connector
THP203 A3
*: B SIDE
1-36 (E)
RX-89 Board
Ref. No. Address Equipment protected
THP5 J4 Circuits in this unit
THP6 F4
THP7 J3
VA-220 Board
Ref. No. Address Equipment protected
THP901 J4 * Circuits in this unit
*
THP951 J3
THP952 J3 *
THP953 H3 *
*
THP954 H3
*: B SIDE
WLL-RX55