SERVICE MANUAL
3) Terminal Function
Table 13
Pin No.
Name
Function
1
Offset canceling filter
DC offset canceling filter for bass boost.
Connect a capacitor (10[µF]) between this terminal and GND.
2
3
4
5
φ
5
φ
4
φ
3
φ
2
Terminals for capacitors of the phase shift blocks.
Value of phase shift each block is
φ
[deg.]=-2tan
-1
(2
π
fCR).
C is capacitance of external capacitor.
R is resistance of internal resister (10k
Ω
(Typ.)).
6
8
Lch input
Rch input
Audio input terminals.
7
GND GND
terminal.
9
Bias filter
Filter for noise rejection of the bias.
Connect a capacitor (4.7[µF])
between this terminal and GND.
10
15
Bass LPF (R)
Bass LPF (L)
LPFs for bass control circuits.
Connect capacitors (0.027[µF])
between each terminals and GND.
11
14
Treble HPF (R)
Treble HPF (L)
HPFs for treble control circuits.
Connect capacitors (8200[pF])
between each terminals and GND.
12
13
14
Wch output
Rch output
Lch output
Audio output terminal.
17
18
19
Woofer LPF 1
Woofer LPF 2
Woofer LPF 3
LPFs for bass boost circuit.
Connect a capacitor (0.033[µF])
between terminal 17 and GND.
Connect a capacitor (0.047[µF])
between terminal 18 and GND.
Connect a capacitor (0.022[µF])
between terminal 19 and GND.
(Continued)
36