Reading from the Motorola Micor "Compa Station" manual having to
do with this power supply: for TPN1105A and TPN1106A ... manual
part number 68P81104E92
TPN1105A 121 or 242 V RMS 50 or 60 Hz
TPN1106A 121 V RMS 60 Hz
Factory Installed Optional Accessories:
C28 c/o TPN1106A, with Battery Charger
C38 c/o TPN1105A, with Battery Charger
C29 c/o C28 or C38 and the Battery Protection and Alarm
Description:
The C28, C38 and C29 options are factory
installed accessories that are available for all
models of Motorola "Micor" base and repeater
stations, either locally or remotely controlled.
* The C28 option permits the station to oper-
ate from 121 volt, 60 Hz ac power normally, but
provides continued operation from 12-volt bat-
teries (emergency power) if the ac power should
fail. When ac power is restored, the power
supply also operates as a battery charger to re-
charge the batteries.
* The C38 option is the same as the C28 op-
tion except that it operates from 121 or 242 volt,
50 or 60 Hz ac power, as well as 12 volt batteries.
* The C29 option is available only if the C28
or C38 power supply/battery charger option is
also included. The C29 option is a Battery Pro-
tection & Alarm package that can be factory
installed, to improve emergency power backup by
providing an audible alarm whenever the station
is operating on batteries. The battery protection
and alarm option generates an audible alarm tone
which "beeps" to indicate that the station is oper-
ating on emergency power. This tone burst, with
a frequency of about 1400 Hz, is approximately
1/4 second long and repeats at 2 1/2 second inter-
vals. On remote control stations, or repeater
station with wire line control, the alarm tone is
injected into the audio line and is heard at the
console (except when transmitting). On repeater
stations, without wire line control, the tone is
transmitted whenever the transmitter is keyed,
so that anyone receiving signals from this station
will know that it is operating on emergency power.
(The description continues ...)
As I remember, the output voltage (battery charging voltage)
control is behind two chassis panels and one circuit board. All
must be removed prior to making the voltage adjustment. (Be
careful) The fix for this is to drill holes in those chassis
panels and the circuit board before installing the power supply
... and then use an insulated tool to make the adjustment.
The only relay involved with these power supplies is the discharged
battery disconnect relay that comes with the C29 option.
Hope this helps,
Neil McKie - WA6KLA
Eric Lemmon wrote:
>
> Kelly,
>
> It would have been nice, had you included those seven numbers in
> your posting. But, by your description, I think you have either
> the TPN1105A or TPN1106A power supply. The model number is usually
> stamped on a box that is immediately below the large black
> transformer. The TPN1105A operates only on 120 VAC 60 Hz, while
> the TPN1106A can operate on either 120 VAC or 240 VAC, and 50 or 60
> Hz. I believe that you have one of these units, because your
> description of a "squeal" as it starts tells me that it incorporates
> a switching power supply circuit. Earlier units were linear in
> design, and made no such noise.
>
> Either of the above units may be equipped with Option C29, called
> the Battery Protection & Alarm option. This provides a relay closure
> when AC power fails, and it also injects a periodic beep into the
> audio to alert the users that it is on battery power. The C29 option
> also can lower the PA power when on batteries, and shut down the
> repeater when the battery voltage falls below a safe level.
>
> These power supplies can be adjusted, with an internal pot, to float
> nicad batteries at 14.25 VDC or lead-acid batteries at 13.0 VDC.
> Before connecting your power supply to any batteries, you should
> check and/or adjust the voltage to the proper level using an accurate
> DVM. Most MICOR stations installed with battery backup used Motorola
> nicad batteries rather than lead-acid, so don't assume that the
> voltage is set for the latter.
>
> Obtain Motorola publication 6881104E92 for operation and service
> information.
>
> 73, Eric Lemmon WB6FLY
>
> [EMAIL PROTECTED] wrote:
> >
> > I have acquired a couple of the Micor Power Supplies with the
> > Battery Charger. Now I asked the local Motorola shop about
> > purchasing a service manual. They are more than happy to help,
> > but need the typical xxxyyyyz part number. Well, there are 7 such
> > numbers stamped on various places of the unit. These are probably
> > subassembly part numbers.
> >
> > Let me describe the thing and no doubt some of you will recognize
> > it. It is heavier than other Micor power supplies, has a larger
> > heat sink, and squeaks when powered up. There is apparently an
> > audio signal and PTT(can I use that acronym anymore) to indicate
> > battery mode, and a low voltage shutoff adjustment. I'd really
> > like to make use of these features. Do any of you recognize it?
> > If you do I need to order a service manual for this model. If you
> > happen to have a manual that could be parted with, please let me
> > know.
> >
> > Kelly Fowler, KE4ADV
> >
>
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