GMT GOLD TX SIGNAL IS PROBLEM VERY LOW DETECTION

[liekwang]

I am looking for scematic whites GMT GOLD I have a problem TX signal has a low detection problem




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I am looking for scematic whites GMT GOLD I have a problem TX signal has a low detection problem




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[kt315]

hi what you did before to ask sos? pics?

[Carl-NC]

The GMT schematic is not available. How do you know the TX circuit has a problem? Have you tried a different coil?

[liekwang]

kt I have a problem with the gold at the TX there is no voltage

[liekwang]

The GMT schematic is not available. How do you know the TX circuit has a problem? Have you tried a different coil?

hi carl thanks for the response, i measure the voltage out of the socket pin that goes to the red and black coil wire on the fcb there is no voltage at all, for the RX cable green and white color has a voltage of 5 volts
hi carl thanks for the response, i measure the voltage out of the socket pin that goes to the red and black coil wire on the fcb there is no voltage at all, for the RX cable green and white color has a voltage of 5 volts

[liekwang]

[QUOTE=kt315;264796]hi what you did before to ask sos? pics?[/QUOTE



red and black colors there is no voltage for the TX, for the rx there are no green and white problems

[kt315]

ok.
1. connect coil to block
2. disconnect the (white color) LOOP socket from pcb
3. take the coil off away of a metal around (walls, floor, metal table, hammer etc)
4. measure on pins/wires BLACK-RED, GREEN-WHITE R and L
5. write values - resistances and inductances of the pairs

[liekwang]

rx and tx coil resistance

[liekwang]

kt315, this is almost similar to the photo you sent in the geotech forum. almost according to the coil resistance that I have. my question is the voltage tx from fcb to the connector there is no voltage at all. has the GMT GOLD MASTER E SERIES scheme

[kt315]

i asked you not about resistance. i asked WHERE IN THE WIRES PAIRS is TX and RX getting where TX opamp on board.
also i asked YOUR VALUES, NOT MINE repeating. if i will begin to repeat my info you will dead under weight.

[kt315]

[ATTACH]48898[/ATTACH][ATTACH]48898[/ATTACH]rx and tx coil resistance

this is one pic. if you are not able put pics in one messages then put them in different messages one-following-to-one.

[liekwang]

KT315 sorry I don't understand what you mean. If I start the engine without the coil installed, I measure the socket pin section that connects the pcb to the coil socket, the socket pin rx has a voltage of 5 volts and for the TX part there is no voltage, what I mean I need a schema to track damage in the TX section

[dbanner]

Oh dear, why don't you connect the coil and measure the Tx voltage at the pcb connector (use the AC function on the meter). Although not very accurate, I imagine your meter should read some voltage of the Tx signal.
5V on the Rx input does not make sense to me unless there is a DC offset, which I doubt. Could be possibly your Rx front end is damaged.

[kt315]

why you can not find out a transistor collector/emitter connected to TX winding/socket then set a probe on its base and TO SEE a signal is or not?

do not ask schema because schema is pcb itself. i'm NOT working in whites company to share the schematics to everybody SOSing around in the world.
my job is a wiper and i clean a territory all daylight by broom and on winter by shovel cleaning out the snow.

[hooby life]

Liekwang Look you reverse connectors coil
this my
yours