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E-15
English
Troubleshooting
If you are having trouble with your amplier, check the
following items.
No sound
Check the following:
< e A28 amplier is switched on.
< e amplier is not muted (i.e Mute is not shown
on the front-panel).
< e selected source is generating audio (e.g., if CD
is selected, then the CD is playing).
< e AV input is selected on the A28 instead of the
expected source. In this case, press AV again to
de-select the AV input.
< e speaker outputs are enabled on the A28/P38,
as indicated by the lights above the SP1 and/or SP2
buttons (as appropriate) being illuminated.
Sound cuts-out unexpectedly
If the temperature of the internal heatsink rises above
a safe level, then a thermal cut-out inside the amplier
operates to protect the unit and the protection system
temporarily removes power to the speakers. e system
will reset itself as the heatsink cools down.
< With two pairs of low-impedance speakers
connected (6 or less), overloads are more likely.
Overloading the amplier may cause it to shut
down because of overheating.
< Note that, due to the high output voltage from a
CD player, it is possible to drive your amplier at
full power even though the volume is not set at
maximum. See page 11 to adjust the input trim of
a CD player or other input device.
Amplifier does not switch back on
Both the ampliers detailed in this handbook have a
protection mechanism which is activated if you switch
the unit on immediately aer turning it o. If this
mechanism activates, wait 30 seconds before switching
the unit on again.
Power commands
Command Decimal Code
Power toggle 16–12
Power-on 16–123
Power-o 16–124
Source selection commands
Command Decimal Code
SAT select 16–0
PHONO select 16–1
AV select 16–2
TUNER select 16–3
DVD select 16–4
CD select 16–7
AUX select 16–8
Menu navigation commands
Command Decimal Code
UP
16–32
DOWN
16–33
MENU
16–37
OK
16–87
Display control commands
Command Decimal Code
Display 16–59
Volume control commands
Command Decimal Code
Mute 16–13
Volume up 16–16
Volume down 16–17
Speaker control commands
Command Decimal Code
Speaker 1 toggle 16–35
Speaker 2 toggle 16–39
Speaker 1 on 16–43
Speaker 1 o 16–44
Speaker 2 on 16–45
Speaker 2 o 16–46
Remote-control codes
e following tables give the IR commands accepted by the A28.
Note that the A28 also responds to code 20–53 (the P LAY command for an Arcam CD player). e A28 switches
automatically to CD input on receiving this command.
15


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