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SONY.
SERVICE MANUAL
FOR
MICROPHONE
HEADSET SYSTEM DR-6020
Note:
Amp board mount cannot be repaired. If it is damaged, change the amp board mount with new one.
Circuit diagram is described for reference. (Figure 11, 13.)
ECM-9030, ECM-9031
TO RECEIVER
[AMP
BOARD]
(COMPONENT
SIDE)
RECEIVER
PLUG
(PJ-055U)
MICROPHONE
MAIN-FRAME
TO
RECEIVER .
MICROPHONE
PLUG
(PJ-O68U)
TO MICROPHONE
sof
Figure 10. Microphone ECM-9030, ECM-9031 Wiring Diagram
ECM-9030
y
ati
asian
i
ais ee
{
PI
|
(o)
1
.
|
{
e
{
|
|
|
Receiver
Plug: Pj-055u |
Receiver
Connector
a
eae
a
a ace a
MIC 1
P2
(ee
ee
|
=
cr
>
|g
7
|
Microphone Plug: PJ-068U
1 {#)
ECM.9031
Cee
es.
Re
Bares
kee
en oa 7]
—_—O—
WV
0
Microphone
Cupsule
:
|
os
:
01.25C24588L
O2:2SD714-4
r
Pk
Receiver Plug: PJ-ossu
|
AUDIO AMP ——
cee
aoee Beanie co eho el J
Figure 11. Microphone ECM-9030, ECM-9031 Circuit Diagram
* Note on replacing microphone main-frame ass'y and amp board mount
When replacing the amp board mount with a new one, change RI (2.7 kQ) mounted on the new amp
board mount with the resistor which value is the same as the one on the former amp board mount.
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