Motorola HT600E Series Handmatig
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BASIC RE-ALIGNMENT OF THE HT600E FOLLOWING RE-PROGRAMMING
Re-alignment of the HT600E after moving it out-of-band is a fairly simple
procedure, requiring the adjustment of two Rx coil cores and one Tx trimmer.
This is best done with the test set connected to the remote connector on the radio.
Sacrificing a public safety mic connector to make a test lead, or using the TNC
connector on the mic, will allow you to make a good RF connection to the radio.
Radio Connector Pinout
1 - Ext Mic
7 - Ext spkr sel
2 - Ext spkr
8 - Spkr common
3 - Opt B+
9 - Busy
4 – PTT
10 - Rem antenna
5 – Gnd
11 - CVC sense
6 – Data
12 - RF gnd
13 - Sense
Before aligning the set, ensure that the connections from the main board to the
head unit are secure. Although this requires some work on each radio, it is worth it
in the long run – particularly if the PSM or RSM is going to be used.
Remove the front panel and radio from the case by removing:
1. Two screws in rear of case.
2. 2 large screws in battery adaptor plate.
3. 2 small screws in battery adaptor plate.
4. Remove the front panel and pull off the speaker connection.
5. Slide radio unit up and out of the case – it does require a bit of a pull to get it
completely out...
6. Remove 2 screws from the top of the tin cover on the back of the radio unit.
7. Slacken 2 screws at the bottom of the cover and remove the cover.
At the top left of the track-side of main board under the cover are 4 connections to
the head unit. Re-solder these and carefully inspect the joints afterwards.
Re-solder
connections
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