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HelicopterBeginners Corner › Beginning electronics
06-02-2004 07:52 PM  13 years agoPost 1
Octavion

rrNovice

Coconut Creek, FL.

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Can anyone help me troubleshoot this problem ?
I have a fut 7chp and just purchased an 8 channel pcm receiver. I charged both the tx and rx but when I plugged the battery into the rx, none of the servos moved. The tx is set to pcm so I don't know what the problem is. I thought maybe I wired something wrong, but the batt is in the batt section of the rx. ????? Also, how do I connect the harness assembly ?? Do I connect it to the rx also ?? How do I use this thing. It looks like it fits into the rx, but the other end doesnt fit anything, including the charger. The manual doesnt explain this at all .

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06-02-2004 08:02 PM  13 years agoPost 2
z11355

rrMaster

New England

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did you purchase a crystal for the PCM receiver
that is the same freq. as the crystal that is installed
in the 7C?

for testing, you should be able to just plug
the battery directly into the receiver.

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06-02-2004 09:32 PM  13 years agoPost 3
Swashplate

rrKey Veteran

UK

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Yes have you bought the right (channel) crystal for your rx?if yes connect the battery lead to the female connector of the switch harness and connect the red plug to rx b/b. the spare black lead is for charging your battery. Hope this helps.

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06-02-2004 10:20 PM  13 years agoPost 4
nheather

rrKey Veteran

Horsham, West Sussex, UK

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Most battery and servo connectors (Futaba a notable exception) can be plugged into the reviever in two ways (one wrong and the other right). The wrong way won't do any harm but won't work. Have you checked this.

Cheers,

Nigel

p.s. Just noticed that you say you have Futaba Tx, but the above may still apply if battery and servos aren't Futaba.

Also if you receiver is JR then it won't work with Futaba transmitter.

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06-02-2004 10:23 PM  13 years agoPost 5
Wisdom-Seeker

rrVeteran

Danville, CA

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Is the receiver a Futaba?

Almost nobody's PCM is compatible with anyone else's. For PCM you pretty much have to stick to the same brand of transmitter and receiver.

--

Wisdom-Seeker
Protest letter to insurance co.: What do you mean "Act of God"?

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06-02-2004 11:15 PM  13 years agoPost 6
BarracudaHockey

rrMaster

Jacksonville FL

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You have to turn the Futaba's off and back on after you change PCM/PPM as well.

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06-06-2004 10:03 PM  13 years agoPost 7
Octavion

rrNovice

Coconut Creek, FL.

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Turns out that the battery was not charged. I thought it was , but when I left it on for 24 hours and reconnected it, it worked. Only problem i have now is programming the tx for the helicopter. Looks so damn complicated. Oh well, any suggestions ?? I have a TSK Mystar 46 .

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