2241A Distribution Panel
INSTALLATION
Section 2
2 - 3
Repeat the above
Audio Check
for pins
13/38
of the
Audio Input Connector and pins 13/38, 14/39, 15/40 of
the Audio Output Connector.
Repeat the above
Audio Check
driving pins
14/39
Repeat the
Audio Check
for pins
16/41
of the Audio
Input Connector and pins 16/41, 17/42, 18/43 of the
Audio Output Connector.
Repeat the above
Audio Check
driving pins
17/42
Repeat the
Audio Check
for pins
19/44
of the Audio
Input Connector and pins 19/44, 20/45, 21/46 of the
Audio Output Connector.
Repeat the above
Audio Check
driving pins
20/45
Repeat the
Audio Check
for pins
22/47
of the Audio
Input Connector and pins 22/47, 23/48, 24/49 of the
Audio Output Connector.
Repeat the above
Audio Check
driving pins
23/48
If any of the audio checks fail, remove the top cover
(per Step 4 on Page 2-4) and check to see that Switches
S1 to S7 are all set to the INPUT position. Refer to the
COMPONENT LOCATION DRAWING on page 2-2 for
the location of S1 - S7.
If any audio check continues to fail with S1 - S7 in the
Input position, replace the top cover. Contact Convex to
arrange for return for warranty repair.
2-3-2 OPERATIONAL CHECK / PTT CIRCUITS
The PTT circuits were tested prior to shipment and will
not generally need to be rechecked prior to installation.
This procedure is provided so that the checks can be
made when needed. The Operational Checks will
require an inexpensive Ohm Meter and a 24 VDC Power
Supply.
Ref page 2-2, PTT Circuit checks assume that all
configuration switches have the factory default settings:
S1 - S7
INPUT = LEFT
24 Front Panel
NORM = CENTER
24 INPUT LOGIC
E/M = DOWN
24 E/M SEL
M I,II,III
= UP
S8, S9
DIST = UP
24 OUTPUT LOGIC
E/M = DOWN
Connect the
Positive
output of the 24 Volt Power
Supply to pins 25 and 50 of the PTT INPUT Connector
(Detector Ground). Connect the
Negative
output of the
24 Volt Power Supply to each PTT INPUT as it is being
checked.
Connect the Ohm Meter
across pins 1 and 26
of the PTT OUTPUT Connector.
PTT Check
.
PTT Input 1 / Outputs 1,2,3
Connect -24
VDC to PTT INPUT 1 (Connector pin 1) and verify that
the Ohm Meter reading across PTT OUTPUT 1 ( pins 1
and 26) is less than 100 Ohms. Verify that the Ohm
Meter reading is greater than 10K Ohms with the -24
Volts removed from PTT Input 1.
Move the Ohm Meter to PTT Output 2 (pins 2 and 27)
and check for < 100 Ohms when -24 V
is present
and
>10K Ohms when -24 V is removed.
Move the Ohm Meter to PTT Output 3 (pins 3 and 28)
and check for < 100 Ohms when -24 V
is present
and
>10K Ohms when -24 V is removed.
Repeat the PTT Check for
Input 4 / Outputs 4,5,6
Repeat the PTT Check for
Input 7 / Outputs 7,8,9
Repeat the PTT Check for
Input 10 / Outputs 10,11,12
Repeat the PTT Check for
Input 13 / Outputs 13,14,15
Repeat the PTT Check for
Input 16 / Outputs 16,17,18
Repeat the PTT Check for
Input 19 / Outputs 19,20,21
Repeat the PTT Check for
Input 22 / Outputs 22,23,24
If any of the PTT checks fail, remove the top cover and
check to see that all Switches are set to the default
setting. Refer to the COMPONENT LOCATION
DRAWING on page 2-2 for the switch locations.
If any PTT check continues to fail with all switches in
default settings, contact Convex to arrange for return for
warranty repair. Replace the top cover.
2-3-3 Operational Check Alarm Logic.
The Alarm
Logic was tested prior to shipment and will not generally
need to be rechecked prior to installation. This
procedure is provided so that the checks can be made
when needed.
Connect an Ohm Meter across pins 25 / 50 of the Audio
Output Connector. Check that the resistance is above
10K Ohm, and that both LEDs on the Front Panel are lit.
Remove the Fuse for the MAIN Supply. Check that the
resistance is less than 100 Ohms, and that the BACKUP
LED is Lit, and the MAIN LED is Off.
REAR VIEW
FRONT VIEW
CONVEX 2241A AUDIO / PTT DISTRIBUTION PANEL
CONVEX
2241A AUDIO / PTT DISTRIBUTION PANEL
BACKUP
MAIN
1/2 AMP
90-264 VAC
POWER SUPPLY
BACKUP
DISABLE
NORMAL
KEY
PTT
MAIN
MADE IN USA
S/N
17
13
14
15
16
18
19
20
21
22
23
24
12
11
10
9
8
7
6
5
4
3
2
1
PTT
AUDIO
OUTPUT
OUTPUT
INPUT
INPUT
FUSE
FUSE
