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NTN9277A Speaker Board Detail
VIEWED FROM TOP SIDE
U1
GND
AUD_OUT
SPKR_BLK_WHT
2
4
A+
3
5
1
C4
C14
C8
C10
SPKR
R6
C5
BLK_WHT
C1
Speaker/Amplifier Specifications
Rated Voltage:
+13.8 Vdc; negative ground
Audio Input:
2400 ohms with adjustable input level
Input sensitivity:
0.5 volt input for full output
Audio output to speaker:
6 watts; less than 10% distortion @ rated voltage
Frequency response:
+1, -3 dB; 300-3000 Hz
Speaker:
5" permanent magnet; 2 ohms
Battery drain:
Standby: less than 0.1 amp; Full output: 0.75 amp
Speaker/Amplifier Model Complement
NTN9277A
Speaker/amplifier board
HSN1006A
Speaker and cable
HKN6455A
Interconnect cable
R5
R4
C2
SPKR_BLK_WHT
SHEILD
AUD_IN
R1
3
R2
2
1
MAEPF-26869-O
Function
The speaker/ampliÞer consists of a 6-watt integrated circuit ampliÞer and a 2.0 ohm speaker mounted in a rugged weather
resistant housing.
NTN9277A Speaker Board Schematic
AUD_OUT
A+
C6
C7
0.1uF
0.22uF
R1
2.2K
AUD_IN
3
C1
SHEILD
R7
C12
R2
2
560
.01uF
500
GND
1
10uF
SPKR
BLK_WHT
P1 CONNECTOR
1
BLK-WHT
LS1
BLK
2 OHM
2
SPKR
3
ADJUST SPEAKER
When the speaker is installed to XTVA (NLD7654),
it is recommended that the loudness adjustment be
set as depicted above for best receive audio clarity.
MAEPF-27114-O
C15
220pF
U1
TDA2003
5
C4
SUP_VOLT
220uF
2
INV
4
OUT
1
NINV
C14
GND
C8
R3
C10
R4
.01uF
3
47
1000pF
220pF
220
C2
C3
.047uF
100uF
C9
220pF
R5
2.2
63B81078C99-O
BLUE
AUD IN
SHIELD
SHIELD
4
PCB
GND
BLK
EDGE
RED
A+
CONNECTIONS
5
BLK/WHT
SPKR
WHT
AUD OUT
6
SHORT CABLE
Model HSN1006A PA/Speaker
NTN9277A Speaker Board Detail, Schematic Diagram
and Specifications
September, 2000
6881110C10-O
C5
0.1uF
R6
1
5
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