Jvc SP-PW880 Service Manual
SERVICE MANUAL
POWERED SUBWOOFER
SP-PW880
E
Continental Europe
EN
US
SP-PW880
Area Suffix
Northern Europe
Singapore
Contents
Safety Precautions
Disassembly method
Description of major ICs
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
1-2
1-3
1-6
No.20863
Jul. 2000
SP-PW880
Safety precaution
!
Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
1-2
SP-PW880
Disassembly method
<Main body>
Removing the speaker (See Fig.1 and 2)
Remove the saran board assembly from the cabinet
1.
assembly while releasing the four corner joints
toward the front.
Remove the eight screws A attaching the speaker.
2.
Disconnect the fasten connected to the speaker
3.
terminal on the back of the speaker.
Removing the LED indicator board
assembly (See Fig.3)
Remove the two screws B attaching the LED
1.
indicator board assembly on the front side of the
speaker box.
Disconnect the harness from connector CN404 on
2.
the LED indicator board assembly.
Saran board assembly
Joint 4
Fig.1
A
Cabinet assembly
Speaker
Remove the two screws C and the panel.
3.
Removing the amplifier assembly
(See Fig.4)
Remove the eleven screws D attaching the amplifier
1.
board on the back of the body.
Disconnect each relay harness connected to the
2.
speaker and the LED indicator board.
D
Amplifier board
DD
A
LED indicator board assembly
LED indicator board assembly
Harness
Panel
A
Fig.2
D
B
C
Fig.3Fig.4
1-3
SP-PW880
<Amplifier>
Removing the cover (See Fig.5)
Pull out the volume knob from the amplifier.
1.
Remove the three screws E and the two screws F
2.
on the amplifier.
Removing the Input board assembly
(See Fig.6)
Cut off the band under the input board assembly.
1.
Disconnect the harness from connector CN851.
2.
Remove the two screws G attaching the input
3.
amplifier / filter board assembly. Pull and disconnect
connector CN811 from the body.
Removing the amplifier board assembly
(See Fig.7 and 8)
Prior to performing procedure, remove the input
amplifier / filter board assembly.
Disconnect the harness from connector CN891 and
1.
CN881 on the amplifier board assembly.
Volume knob
E
F
(Only US)
Cover
Fig.5
G
CN811
Input board
assembly
CN851
Remove the six screws H attaching the amplifier
2.
board assembly.
Remove the two screws I attaching the heat sink 1
3.
and the two screws J attaching the heat sink 2
respectively.
Heat sink 2
I
J
Heat sink 1
I
J
Amplifier board assembly
CN881
H
H
Band
Fig.6
Amplifier board assembly
CN891
H
H
1-4
Fig.7Fig.7
Removing the transformer assembly
(See Fig.9)
Cut off the three bands fastening the harnesses
1.
extending from the transformer assembly.
Disconnect the harness from connector CN891 on
2.
the amplifier board assembly and from CN899 on the
power board assembly.
Remove the four screws K attaching the transformer
3.
assembly.
Amplifier board
assembly
CN891
Power board
assembly
CN899
K
SP-PW880
Bands
K
Band
Transformer assembly
K
Fig.9
Removing the power board assembly
(See Fig.10)
Disconnect the harness from connector CN899 on
1.
the power board assembly.
Remove the three screws L assembly.
2.
Remove the cord stopper.
3.
CN899
Power board
assembly
L
Cord stopper
L
Fig.10
1-5
SP-PW880
Description of major ICs
STK411-290E (IC821) : Power amplifier
1
3
5
4
2
7
SUB
6
8
R31
TR31
Comparator
TR14 TR13
R14
TR21
D7
D35
R16
D33
D31
R12
C3
R19
TR15
TR16
TR20
R15
D32
R16
D34
R17
TR19
C6
D36
TR17
R18
Comparator
TR32
R32
916
22
21
R13
1-6
17
D6
R4
TR9
TR1 TR2
TR11 TR23
TR6
C2
C1
R2
R9
18
TR24
R5
TR4
TR3
TR12
TR8
19
R6
TR22
TR10
20
TR7
R7
C5
TR5
11
15
14
10
R8
R51
12 13
D1
R3
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