Polk Mono Signa S4 Service Manual page 28

For Subwoofer : AMP(SUB), POWER(SUB)
AMP(SUB) (A side)
M1 C637 R614 R671 C688 C690 R665 LED601 R625 SW1 CE2
R708 R1025 R672 R1024 R1023 R666
XP16
R624
R623 R615
TP1 C697 M3
R667 R669
L2
R668 R670 C8
R620 C9
R9
C616 C13
R622
C14 C5
C618
R621 R11 C12 C7 C6
C617 C19
R16
R5 C52
R713
R13
C28 R21 R25
C659 C712
C713 L3
R22
TM8 R12
U2
C46
C45 C43
Q608
R720 R61 R37 R24
C91
R23
C718 FB608
C56 C50
C719 FB607 U1
R1 R43 C722 C44 C34
CCX2 C2 R41
C11
C723 R20
C724
XP2 C721
XP3 C10
Q607 REU8 C720
M2 QEU2
R719 C26
C25
CE3
C714
M7
XP1 R1031
Q1 XS1
Q6
R35
U3 FB606 Q5 R36 C55
POWER(SUB) (A side)
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AMP(SUB) (B side)
M6
TM6
TM5 TM3
TM1 TP16
TM2
TP8
TP11
TP9
TP12
TP3
TP7 TP6
TM7
STB_3V3
TP10
TM4
POWER_23V
TP13 SUB+ SUB-
TP15
M5
TP14
TP5
M4
POWER(SUB) (B side)