HS-MB1 - Sony Audio Service Manual (repair manual). Page 6

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HS-MB1
6
Connecting the Doorbell or the 
External Chime
You can use any commercially available cord of gauge AWG 18 to AWG 
26.
Note
Strip 10 mm (0.4 inches) of insulation off the cords and twist the bare wires 
together tightly. 
Be sure that the length of the bare wires is 10 mm (0.4 inches), matching the full-
size illustration below.
10 mm (0.4 inches)
Connecting the Doorbell
You can connect up to two doorbells. The following models of Doorbell 
can be connected.
● DS3B, DS3NB, BD3BN, D3BN (manufactured by M&S)
● LE-D, LE-DA (manufactured by Aiphone)
Before connecting the Doorbell, be sure the MODE switch is set to 
“OFF.” Set the MODE switch to “2” or “3” after connecting each 
Doorbell, as illustrated bellow.
Connection for DS3B, DS3NB, BD3BN, D3BN 
(manufactured by M&S)
Use 2-conductor cable for the connections between the HS-MB1 and the 
Doorbell.
DB1
2
E
1
MODE
OFF
2
3
DS3B, DS3NB, BD3BN, D3BN
Set the MODE switch to “3”
From terminal block “E”
From terminal 
block “2”
From terminal 
block “1”
Connection for LE-D, LE-DA (manufactured by Aiphone)
1
E
DB1
2
E
1
MODE
OFF
2
3
Set the MODE switch to “2”
e.g., LE-D
Tips
● The wiring can extend up to 300 feet when using AWG 22 wire.
● After connecting the HS-MB1 to the Keypad (HS-KP1) (not supplied), the 
name of the Doorbell is displayed on the front panel display of the HS-KP1 and 
you can configure the settings for the Doorbell by the HS-KP1. For details on 
the settings, refer to the instruction manual of the HS-KP1.
Notes
● Do not change the MODE setting while the power is on.
● Set the MODE switch to “OFF” when no Doorbell is connected.
To adjust the mic/speaker sensitivity of the Doorbell
Set the GAIN switch to “1,” “2,” or “3.”
“1” is the minimum volume level.
Tip
You can change the mic/speaker sensitivity of the Doorbell while the power is on.
Connecting the External Chime
You can connect the LA-126WH Two-note DOOR CHIME 
(manufactured by NuTone) as illustrated below.
FRONT
TRANS
REAR
CHIME
2
E
1
LA-126WH
Transformer
Tips
● The wiring can extend up to 60 feet when using AWG 22 wire.
● To ring the chime connected to terminal block 1, select “Chime 1” on the 
External Chime settings of the HS-KP1. Likewise, to ring the chime connected 
to terminal block 2, select “Chime 2” on the External Chime settings of the 
HS-KP1.
For details on the settings, refer to the instruction manual of the HS-KP1.
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