Korg Trinity repair/popravilo
Trinity 61 pro
Replacing Q7 mute
transistor/menjava Q7 mute transistorja
Zaradi
dotrajanosti ali kakšnih napak omrežja,transporta ali napak v kablih itd..se
nam lahko večkrat zgodi da odpove kakšen avdio izhod.Ni
zvoka na L izhodu.
Due to wear
or what network errors, or errors in the transport cables, etc. .. can often
happen to terminate the audio output.No
sound on L output.
Previdno
odvijemo vse vijake na spodnjem delu klaviature in odstranimo zaščitni pokrov
na spodnjem delu klaviature
Carefully unscrew all the screws on the bottom of the keyboard and remove the protective cover on the bottom of the keyboard.
Pogledamo
katera plošča tiskanega vezja je z oznako KLM1825/26,to je avdio plošča tiskanega
vezja na kateri so elementi za avdio izhode in izhod za slušalke.
See the pcb which is marked KLM1825/26, it's audio pcb contains the elements of audio output and headphone output..
Preverimo tudi morebitne napake na volume potenciometru (drsnik) in konektorjih,preverimo oba kanala L in D.
Check the
errors on the volume potentiometer (slide fader) and
connectors, check both channels L and D..
Preverimo
tudi konektorje na avdio plošči KLM1825/26 in
povezavo na volume drsni potenciometer.
Check the
connectors on the audio panel KLM1825/26 and a link to the volume
slider potentiometer.
Ker
nimamo signala na L izhodu,kakor tudi ne na slušalkah,signal pa je na potenciometru
OK,je posledično napaka nekje v povezavi od potenciometra k izhodu,premerimo mute transistor Q7.
Because we
have no signal at the output of L, neither
on headphones, but the signal is OK on volume slide pot is a fault somewhere in the connection from a potentiometer to an output,check the
mute transistor Q7..
Mute transistor Q7 z oznako 2SC2878 prevaja v smeri E-C kar nam
kratko sklene avdio signal na maso (podobno kot bi imele vklopljeno funkcijo mute),transistor zamenjamo z
podobnim bipolarnim lahko iz BC serije.
Mute transistor Q7 marked as 2SC2878 has short connection
in way E-C,that a short way audio
signal to ground (like to have
a mute function turned on), we have to replace transistor with same bipolar can be
from BC series.
Preden
sestavimo klaviaturo preverimo delovanje.Test
proceduro štartamo s pritisnjenima tipkama
Before assembly
the keyboard we check all
functions. Test procedure starts
with pressed keys 5 and Enter, and then switched on. On both sides of
L and D (stereo), we get the
output signal, check the signal on the headphones.
Opozorilo:AudioLogs ne odgovarja,da ne bo prišlo
do napake med postopkom ali za škodo ki se lahko zgodi. Preden se lotite
popravila izlključite aparat iz omrežja. S posegom v
aparat lahko poškodujete vezje. Bodite previdni pri menjavi Q7,ker lahko poškodujete
ploščo tiskanega vezja. Če tega posega niste vešči naj za vas to opravi
strokovnjak.
Warning: AudioLogs is not responsible, that there will be no errors during the procedure or damage that may occur. Before you start to repair,plug
out unit from the network. By intervening in unit could damage the circuit. Be careful when frepacing Q7 because they can damage the pcb. If you are not skilled in this practice
should be done for you an expert.
AudioLogs,October2013,info@audiologs.com
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