A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
74
HTR-2064/NS-B20/NS-C20/NS-SWP20
PJ24
PJ21
PJ22
CB3
CB21
CB22
W1
IC2
IC1
OPTICAL
(TV)
MAIN (1)
(Side A)
POWER TRANSFORMER
FRONT
+/-
SPEAKERS
+/-
L
R
+/-
+/-
L
R
CENTER
SURROUND
SUBWOOFER
OUT
SUB
WOOFER
AUDIO2
AUDIO1
AUDIO4
AUDIO3
AUDIO6
AUDIO5
L/R
L/R
COAXIAL
(CD)
COAXIAL
OPTICAL
1
19
+5D
AU1_D
AU2_D
DGND
AU3_D
AU4_D
DGND
AGND
ADL
ADR
IPE
NC
NC
AGND
NC
AGND
NC
NC
AUXE
DA_FL
DA_FR
AGND
DA_C
DA_SW
AGND
DA_SL
DA_SR
AGND
NC
NC
AGND
F_MT
C_MT
S_MT
NC
NC
TUL
TUE
SW_MT
R2A_SCK
DGND
I_PRT
AMP_LMT
N_HP_DET
NC
SPRY_F
THM3
+1
2A
NC
A
GND -1
2A
PS_PR
T
-VP
HPL HPE HPR
N_HP_DET
TUR
NC
R2A_MOSI
DGND
DC_PRT
AMP_OLV
TRANS_RY
HPRY
SPRY_EX
PS_PRT
ACH
ACH
E
E
ACL
ACL
1
19
5 k-ohms
10
W
5 k-ohms
10
W
Ref no. Location
D1
D5
D2
D5
D3
H5
D4
H6
D12
I3
D13
H3
D14
G5
D15
C5
D16
G4
D17
H3
D18
G3
D19
E5
D20
F5
D21
D5
D22
F5
D23
I2
D24
H5
D25
I3
D201
E4
• Semiconductor Location
Ref no. Location
D202
E3
IC1
G6
IC2
D6
Q1
I6
Q2
H6
Q3
H5
Q4
I6
Q5
I5
Q6
H5
Q7
F5
Q8
C5
Q9
D5
Q10
B5
Q11
E5
Q12
G5
Q13
E5
Q22
I2
Q23
F4
Notes:
Safety measures
• Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such
as wearing insulating gloves.
• Note that the capacitors indicated below are dangerous even after the power is turned off because an electric charge remains and a
high voltage continues to exist there. Before starting any repair work, connect a discharging resistor (5 k-ohms/10 W) to the terminals
of each capacitor indicated below to discharge electricity. The time required for discharging is about 30 seconds per each.
C55, C56 on MAIN (1) P.C.B.
Power amplifier IC replacement
• When the power amplifier IC (IC 1 or IC 2 on MAIN P.C.B.) requires to be replaced, be sure to refer to “POWER AMPLIFIER IC
REPLACEMENT” before its replacement.