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Block Diagram for
D E S I G N E D & M A N U FA C T U R E D B Y Y O R K V I L L E S O U N D
MIC
3
2
1
LINE / CD
BUFFERS
*CLASS-D AMPLIFIER (WOOFER)
INPUT
LP
DIFF AMP
MODEL TYPE:YS1002
NX55P-2
+24 PHANTOM
Tone
MIC LEVEL
MONO
SUM
LINE / CD LEVEL
HP
EQ
LP
LP
CLIP DETECT
CIRCUIT
R47
INTEGRATED
ERROR AMP
RAMP
GENERATOR
SILENT ON/OFF
RELAY
MIXER
ON/OFF
LIMIT DETECT FAST
EQ (2 NOTCHES)
LIMIT DETECT SLOW
LIMIT
HP
LP
60 Hz
100 Hz
60 Hz
BYPASS
1
NOTE: Shorting R47 will eliminate
feedback and audio signal allowing
GND AT
troubleshooting of Level Shift, drivers
OUTPUT
and output devices
2
U7
U9. Q8, U10
3
LEVEL SHIFT
-120
LINK
1
2
3
2
1
3
SILENT ON/OFF
RELAY
2-TIER
LINEAR AMP
(HORN)
LIMITER
LED
CLASS-D
LIMIT
AMPLIFIER
(WOOFER)
LIMIT
SILENT ON/OFF
*BLOCK DIAGRAM
RELAY
LOCATED BELOW
100 Hz
60 Hz
OUTPUT
TRANSISTORS
OUTPUT
FILTER
U6
GATE DRIVE
SILENT ON/OFF
VIA Q19
HF DRIVER
WOOFER
WOOFER
BLOCK-DIAG-NX55P-2-00-2v1.ai
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