Display During Menu Operation; History Of Protection Function - Yamaha RX-V750 Service Manual

The protection function worked due to a de-
fect or overload in the power supply. If the
power is turned on with the abnormality un-
solved, the protection function works in about
1 second to turn off the power.
The protection function worked due to a DC
voltage appearing at the speaker terminal.
A cause could be a defect in the amplifier. If
the power is turned on with the abnormality
unsolved, the protection function works in
about 3 seconds to turn off the power.
The protection function worked due to the
temperature limit being exceeded. Causes
could be poor ventillation or a defect related
to the thermal sensor. If the power is turned
on with the abnormality unsolved, the pro-
tection function works in about 1 second to
turn off the power.
For detection of each protection function (except I-PROTECT)
, refer to DIAG MENU No.11 AD DATA (p.40).

History of protection function

When the protection function has worked, its history is stored
in memory with a backup. Even if no abnormality is noted while
servicing the unit, an abnormality which has occurred previ-
ously can be defined as long as the backup data has been
stored.
The history of the protection function is cleared when DIAG is
cancelled by selecting PRESET RESERVED (Memory initial-
ized) of DIAG menu No.10 or when the backup data is erased.

Display during menu operation

During the DIAG operation, the menu list described in
the section of the startup screen appears on the monitor
screen and the function at work is indicated on the FL
indicator. The contents displayed during the function op-
eration are described later in the "Details of DIAG menu"
section.
PS PRT :000 Z
DC PRT :000 Z
TMP PRT:000 Z
RX-V750/DSP-AX750/DSP-AX750SE
RX-V650/HTR-5760
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