Hitachi 42HDT51M Service Manual page 59

12.3 AUDIO CIRCUIT BLOCK DIAGRAM (MONITOR)
Audio Circuit Block Diagram
RELAY CONT.
MUTE CONT.
SCL1
SDA1
Lch IN
Rch IN
PM ON
+12V
TRUBASS
BU4052
NJW1133A
NJM2192AM
MASTER VOL.
TRUBASS
BALANCE
TONE CONT.
SURR.ON/OFF
POWER OFF DET.
RELAY DRIVE
MUTE DRIVE
OVER LOAD
TA20201B
MUTE
DIGITAL
POWER AMP
MUTE
59
PT5-G/PW1-H
RELAY SP OUT Lch
RELAY SP OUT Rch
MUTE
SUB
WOOFER
OUT