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(IC1513, IC1515, IC1527, and IC1529).
The output analog audio signal is output from the speakers via the overcurrent detection circuit,
overload detection circuit, LPF, and speaker relays.
The speaker relays can switch signals for front A, front B, center, surround A, surround B, and
surround back individually according to the mode.
Overcurrent to a speaker is detected at the 4/8IN terminal (IC1800 1-pin) of the output
controller. Overload is also detected at the DC terminal (IC1800 32-pin) of the output controller.
(Important) Error messages
The content of a problem can be identified by the number of the CHECK CODE that is displayed
with the error message on PROTECTOR and the like. CHECK CODEs are displayed when an
abnormal input is detected at the detection terminal of the output controller (IC1800).
Table 2-1 Error codes
CHECK CODE
Error description
Output controller detection terminal
11
Overcurrent
IC1800 1-pin 4/8 IN
12
High temperature in the amplifier
block
IC1800 35-pin DIAG
13
High temperature in the power
supply block
IC 3-pin TEMP
21 Overload IC1800
32-pin
DC
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