I wanted to be able to record from my stereo system and playback through it.
I have a dell-Latitude E6420 laptop, with a TRRS port.(headphones/playback) on
the left side of the computer. It uses the OMPT standard.as is explained at
this website = blog.mklec.com/trrs-and-trs-plugs-and-sockets-explained
I found a TRRS plug with 3 RCA connectors on it.
Had I found an OMPT compliant connector I would have spliced the stereo headphone
jack [3.5mm TRS] into the left and right channel cables. I did not know at the
time that the Yellow [vcr/video] RCA jack could remain intact.
it did not work when plugged in (there was no TRS connector).
I cut the RCA heads off a foot from the plugs.
I was now left with 6 wires [3 cores and 3 ground/common].
from the TRRS plug.
wire from tip [TRRS Ring 1]= Left channel [in my case White RCA plug].
wire surrounding the core = sleeve [Ring 4 TRRS].
wire from ring 2 = Right channel [in my case Red RCA plug].
wire surrounding the core = sleeve [Ring 4 TRRS].
wire from ring 3 = microphone [Ring 3 TRRS][in my case Yellow RCA plug].
wire surrounding the core = sleeve [Ring 4 TRRS].
bare 3 inches of wire from the outer casing
bare 1 inch of wire from core wire.
this leaves you with 3 inches of common wire and 1 inch of core wire.
In order to record from the stereo ;
I then cut 2 feet from the tip of a TRS [3.5mm stereo plug].
this left me with 4 wires :
wire from the tip [Ring 1 TRRS-furthest from wire] Left channel.
wire surrounding the core = sleeve [Ring 4 TRRS].
wire from middle ring = Right channel [Ring 2 TRRS]
wire surrounding the core = sleeve [Ring 4 TRRS].
bare 3 inches of wire from the outer casing
bare 1 inch of wire from core wire.
this leaves you with 3 inches of common wire and 1 inch of core wire.
In order to play-back my laptop music from the stereo I needed the RCA plugs:
bare 3 inches of wire from the outer casing
bare 1 inch of wire from core wire.
this leaves you with 3 inches of common wire and 1 inch of core wire.
I used the RCA jacks cut from the TRRS plug;
the core of the Left channel = Ring 1 [tip] in my case white plug.
wire surrounding the core = sleeve [Ring 4 TRRS].
the core of the Right cannel = Ring 2 TRRS in my case Red Plug.
wire surrounding the core = sleeve [Ring 4 TRRS].
the core of the Video/vcr input = micropone [Ring 3 TRRS] Yellow plug.
(TRRS Ring 1) the tip [furthest from the cord] Left channel information
3 connections
wire connecting the tip of the TRS [stereo 3.5mm plug] Left Channel.
wire connecting the tip [post] of the RCA plug.
wire from the (TRRS Ring 1) [tip] plug [connecting to the computer]
Twist the wires together [soldering optional] then either use electric tape or
shring tubing to isolate them from any other connections.
(TRRS Ring 2) Right channel information
3 connections
wire connecting the middle of the TRS [stereo 3.5mm plug] Right Channel.
wire connecting the tip [post] of the RCA plug Right channel.
wire from the (TRRS Ring 2) plug [connecting to the computer].
Twist the wires together [soldering optional] then either use electric tape or
shring tubing to isolate them from any other connections.
(TRRS Ring 3) Microphone information
1 connection
wire connecting the tip [post] of the video/vcr RCA plug to TRRS Ring 3.
Twist the wires together [soldering optional] then either use electric tape or
shring tubing to isolate them from any other connections.
(TRRS Ring 4) Sleeve [[ground]
8 connections
all the wires surrounding the core of the TRS [stereo 3.5mm plug],
all the wires surrounding the core of the RCA plugs,
all the wires surrounding the core of the TRRS left/right/microphone
wires.
Twist the wires together [soldering optional] then either use electric tape or
shring tubing to isolate them from any other connections.
Unless the RCA video/vcr plug is used nothing works!!
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latitude E6420 headphone/microphone jack problem / soloution.
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