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22. SURVEILLANCE I/O CONNECTOR FUNCTIONS
The rear panel Surveillance I/O connector* permits "Speaker Line Reference Impedance Measurement (Initial
Setting)" and "Speaker Line Check" to be enabled and monitored by connected external equipment. Referring
to the pin arrangement and functions, prepare the matching D-sub male connector (screw-lock type) for
connection to the external equipment. (See p. 11 No. 41 SURVEILLANCE I/O connector.)
* Requires installation of the optional SV-200M Surveillance Board.
SURVEILLANCE I/O connector pin function table
Function/status
Zone 1 speaker line is shorted.
Zone 1 speaker line is disconnected.
Zone 2 speaker line is shorted.
Zone 2 speaker line is disconnected.
Zone 3 speaker line is shorted.
Zone 3 speaker line is disconnected.
Zone 4 speaker line is shorted.
Zone 4 speaker line is disconnected.
Zone 5 speaker line is shorted.
Zone 5 speaker line is disconnected.
Some of speaker lines are grounded.
Power amplifier is faulty.
During measurement of the speaker line
reference impedance (Initial setting) or during
check of the speaker lines.
The speaker line reference impedance
couldn't be measured successfully.
(The measured impedance exceeds the
expected range or is unstable.)
Not used.
Check of the speaker line impedance starts.
Measurement of the speaker line reference
impedance (Initial setting) starts.
Not used.
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
I
22
23
24
25
Signal name
Zone 1 short
Zone 1 Disconnection
Zone 2 short
Zone 2 Disconnection
Zone 3 short
Zone 3 Disconnection
Zone 4 short
Zone 4 Disconnection
Zone 5 short
Zone 5 Disconnection
Ground fault
Power amplifier failure
Setting/checking busy
Initial setting error
Speaker line check
activation
Speaker line initial
setting activation
IN
/OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN
IN
Signal/logic
Active Low
Active Low
Active Low
Active Low
Active Low
Active Low
Active Low
Active Low
Active Low
Active Low
Active Low
Active Low
Active Low
Active Low
One-shot make
One-shot make
SV-200M's D-sub female connector
13 1
25 14
SURVEILLANCE I/O
Locking nut: 4-40 UNC