Marantz PM-15S2 - Manual (Page 29)

23
ENGLISH
NAMES AND FUNCTIONS
BASIC CONNECTIONS
BASIC OPERA
TIONS
ADV
ANCED CONNECTIONS
ADV
ANCED OPERA
TIONS
TROUBLESHOOTING
OTHERS
TROUBLESHOOTING
TROUBLESHOOTING
ABOUT THE PROTECTION CIRCUIT
This unit is equipped with a protection circuit to protect the
amplifier circuits and speaker system from damage.
¶
At power on
For about 8 seconds after the power is turned on, the protection
circuit is activated, muting the sound to give the amplifier
circuits time to stabilize. Once the amplifier circuits stabilize,
the protection circuit is released, and audio is enabled.
¶
In the event of overcurrent
The protection circuit is activated if current exceeding a certain
level is detected, which can happen if excessive signal flow is
input to the amplifier or if the unit is connected to a speaker
system of less than 4 Ω impedance. The protection circuit is
also activated if a speaker cable shorts.
¶
If excessive ultrabass signals are input
The protection circuit is also activated if ultrabass signals are
input.
¶
If the main-amplifier overheats
The protection circuit is activated if the temperature of the main-
amplifier section rises above a certain level, which can happen
if the amplifier is continuously used with excessive signal flow
being input to it. The protection circuit is also activated when
the specified operating temperature is exceeded, which can
happen if the vents on top of the amplifier are covered or if the
amplifier is installed on a cramped audio rack.
In such cases, “PROTECT” flashes on the display, and the
volume is automatically decreased. After about 8 seconds, the
protection circuit is deactivated. Adjust the volume again.
If the abnormality persists, the unit will automatically shut
itself off, and the OPERATE indicator will flash (twice per
second).
In such a case, turn the unit off then back on again after about
1 minute.
7
In the event of amplifier trouble
The protection circuit is activated, and the power is
automatically shut OFF, if an abnormality is detected in the
power circuit. The same happens if the main fuse inside the
amplifier blows. In such cases, the OPERATE indicator flashes.
(8 times per second)
Turn the unit off then after several minutes turn it on again.
If the display does not light up, and the OPERATE indicator
remains flashing after the unit is turned on again, the unit may
be in failure.
In such a case, disconnect the power cord immediately, and
contact the place of purchase, your nearest Marantz dealer,
our customer service center, or our repair service center.
7
Error messages
When multiple amplifiers are connected by F.C.B.S., the error
messages described in the table below may be displayed on
the display. In such a case, ID number setting or remote cable
connection may be in failure. Check the ID number or remote
cable connection, referring to the table below. For details on
ID number setting, see “HOW TO SET ID NUMBERS”, on
page 17.
Indication Meaning Measures to be taken
1 ERROR 02
Multiple
amplifiers take ID
No. 2.
Assign different
ID numbers to the
amplifiers.
2 ERROR 03
Multiple
amplifiers take ID
No. 3.
3 ERROR 04
Multiple
amplifiers take ID
No. 4.
4 ERROR 11
The amplifiers
with ID Nos.
2-4 cannot
communicate
with the amplifier
with ID No. 1. If the amplifier with ID
No. 1 is not on, turn
it ON.
Check that the
remote cable is
properly connected.
5 ERROR 12
The amplifier with
ID No. 1 cannot
communicate
with the
amplifiers with ID
Nos. 2-4. If multiple amplifiers
take ID No. 1, set ID
numbers properly.
Check that the
remote cable is
properly connected.
PM-15S2_UN_01_Eng.indd 23 PM-15S2_UN_01_Eng.indd 23 09.5.18 2:57:04 PM 09.5.18 2:57:04 PM