PM1000
II
Operation/Installation Manual
Page 6
Revision 8, April 2020
returned COD.
Appendix A
PTT Modifications
When received from the manufacturer, an after-market
PTT switch opens the mic audio path to the "ring"
connection of the PTT mic plug. When the PTT is be-
tween the intercom and the headset, the intercom func-
tion will not work until the PTT switch is depressed. A
simple modification can be performed to allow proper
intercom operation. NOTE: This mod does not alter
normal operation. The following are sample proce-
dures for common PTT switches. Contact the PTT
manufacturer if you require more information.
Procedures for the David Clark PTT
1.Unscrew the round black plastic cover from the
jack.
2.Connect the joined black wires to the red wire
3.Replace the black plastic cover
Procedures for the Telex PT-200
1.Unscrew the round black plastic cover from the
jack.
2.Cut the red wire in the middle of the wire
3.Strip both ends of the insulation
4.Solder the two ends to the ground lug to the PTT
jack
5.Replace the plastic cover
Procedures for the Telex PT-300
1.Unscrew the round black plastic cover from the
jack
2.Remove the heat shrink material from the joined
black wires
3.Solder these two wires to the lug that has a
white wire already soldered to it.
4.Replace the black plastic cover
Appendix B
Instructions for FAA Form 337
It is up to the installer to determine if the installation is
a major or minor aircraft alteration. (Refer to AC 20-
177). One possible method of airworthiness approval
is through an FAA Form 337,
Major Repair and Alter-
ation (Airframe, Powerplant, Propeller, or Appliance)
In the case of the PM1000
II
, you may use the follow-
ing text as a guide.
Installed 4-place intercom, PS Engineering
PM1000II, part number (xxxxx) in (
loca-
tion
) at station
. Installed per
AC43.13-2B, Chapter 2,. Installed per PS
Engineering
Installation Operators Manual
p/
n 200-123-0003, revision 1, dated ________.
This unit is FAA-Approved under TSO C50c
Section 4
Warranty and Service
4.1
Warranty
In order for the factory warranty to be valid, the instal-
lations in a certified aircraft must be accomplished by
an FAA- certified avionics shop and authorized PS
Engineering dealer. If the unit is being installed by a
non-certified individual in an experimental aircraft, a
factory-made harness must be used for the warranty to
be valid.
PS Engineering, Inc. warrants this product to be free
from defect in material and workmanship for a period
of one year from the date of sale. During this one year
warranty period, PS Engineering, Inc., at its option,
will send a replacement unit at our expense if the unit
should be determined to be defective after consultation
with a factory technician. The customer is responsible
for return shipment costs.
This warranty is not transferable. Any implied warran-
ties expire at the expiration date of this warranty. PS
Engineering SHALL NOT BE LIABLE FOR INCI-
DENTAL OR CONSEQUENTIAL DAMAGES. This
warranty does not cover a defect that has resulted from
improper or unreasonable use or maintenance as deter-
mined by us. This warranty is void if there is any at-
tempt to dissemble this product without factory author-
ization. This warranty gives you specific legal rights,
and you may also have other rights which may vary
from state to state. Some states do not allow the exclu-
sion of limitation of incidental or consequential dam-
ages, so the above limitation or exclusions may not
apply to you.
4.2
Factory Service
The
PM1000
II
is covered by a one-year limited war-
ranty. See warranty information.
The unit is covered by a one-year limited warranty.
See warranty information. Call PS Engineering, Inc. at
(865) 988-9800 before you return the unit. This will
allow the service technician to provide any other sug-
gestions for identifying the problem and recommend
possible solutions.
After discussing the problem with the technician and
you obtain a Return Authorization Number, ship prod-
uct to:
PS Engineering, Inc.
Attn: Service Department
9800 Martel Road
Lenoir City, TN 37772
(865) 988-9800 FAX (865) 988-6619.
NOTE:
PS Engineering is not responsible for units shipped US
Mail.
If no method of payment is provided, the units will be