SERVICE MANUAL No.21106 May. 2002 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. SP-PW100 POWERED SUBWOOFER Safety precautions Disassembly method Description of major ICs 1- 2 1- 3 1- 7~8 Contents STAND BY/ON SP-PW100 POWERED SUBWOOFER SP-PW100 Area suffix UP ---------------- Korea
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SERVICE MANUAL
No.21106May. 2002
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
SP-PW100
POWERED SUBWOOFER
Safety precautionsDisassembly methodDescription of major ICs
1- 21- 31- 7~8
Contents
STAND BY/ONSP-PW100 POWERED SUBWOOFER
SP-PW100
Area suffix
UP ---------------- Korea
SP-PW100
1-2
1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.
2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturer`s warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.
4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.
5. Leakage currnet check (Electrical shock hazard testing)After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).Alternate check methodPlug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground.Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).
1. This equipment has been designed and manufactured to meet international safety standards.2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.3. Repairs must be made in accordance with the relevant safety standards.4. It is essential that safety critical components are replaced by approved parts.5. If mains voltage selector is provided, check setting for local voltage.
Good earth ground
Place this probe on each exposedmetal part.
AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)
1500 10W
0.15 F AC TYPE
!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.
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety. (This regulation does not correspond to J and C version.)
SP-PW100
1-3
Remove the front net from the four holders that are fixing the front net.
Note:
1.
2.
3.
Disassembly method<Main body>
Removing the front net (See Fig.1, 2)
Remove the front net.
Remove the six screws A attaching the woofer.
Pull out the woofer toward you.
Remove the speaker cord.
Removing the woofer (See Fig.3, 4)
When it is hard to remove the front net, insert a minus driver, etc. in the place between the main body and the front net as shown in Fig.2 before removing the front net. Exercise care not to damage the main body and the front net when inserting the minus driver. For this purpose, insert the minus driver together with cloth and the like.
Fig.1
Fig.2
Fig.3
Fig.4
Main body
Front net
Woofer
Speaker cord (Red, Black)
Woofer
A
A
Front net
SP-PW100
1-4
Place the bottom of the front panel upward.
While inserting a minus driver, etc. in the two grooves, remove the four holders that are fixing the front panel.
Note:
1.
2.
Removing the front panel (See Fig.5)
Remove the front panel.
Remove the two screws B attaching the LED board.1.
Removing the LED board (See Fig.6)
Remove the eleven screws C attaching the amplifier box on the back side of the main body
Remove the speaker cord connector connecting the amplifier box and the speaker.
1.
2.
Removing the amplifier box (See Fig.7, 8)
Exercise care not to damage the main body and the front net when inserting the minus driver. For this purpose, insert the minus driver together with cloth and the like.
Fig.5
Fig.6
Fig.7
Fig.8
Front panel
Bottom of main body ConnectorLED board
B
C
C
Front panel
Amplifier box
Speaker cord connector
SP-PW100
1-5
Pull out the volume knob and the crossover frequency knob. Remove the three screws D attaching the input jack and speaker terminal.
Remove the two screws D' attaching the voltage selector, and then remove the rear panel.
1.
2.
3.
<Amplifier box>
Removing the rear panel (See Fig.9)
Remove the rear panel.
Pull out the power switch knob.
Remove the three screws E and the two screws F attaching the bracket a.
Pull out the power cord clamp from the bracket a.
Pull out the power switch board backward.
Remove the connector CN899.
Note:
1.
2.
3.
4.
5.
Removing the power switch board (See Fig.10)
Remove the rear panel.
Pull out the phase knob.
Remove the two nuts attaching the volume knob.
Remove the two screws G and the two screws H attaching the bracket b.
After removing the connector CN811, pull out the terminal board.
Remove the connector CN851.
1.
2.
3.
4.
5.
Removing the terminal board (See Fig.11, 12)
Cut the tie-band, if necessary.
Volume knob
Amplifier box
Rear panel
Nut
Phase knob
Bracket b
Terminal board
CN899
CN811CN851Terminal board
Power switch knob
Bracket a
Power switch board
Voltage selector
Crossover frequency knob
D
D'
F
E
G
H
Fig.9
Fig.10
Fig.11
Fig.12
SP-PW100
1-6
Prior to performing the following procedure, remove the rear panel, the terminal board.
Remove the connectors CN881 and CN891
Remove the six screws I attaching the amplifierboard.
1.
2.
Removing the amplifier board (See Fig.13)
Prior to performing the following procedure, remove the rear panel, the power supply board, the amplifier board.
Remove the four screws J attaching the transformer. J1.
Removing the transformer (See Fig.14)
Fig.13
Fig.14
Amplifier board
Transformer
I
I
J
CN891CN881
SP-PW100
1-7
TR
1T
R2
R2
C1
TR
3T
R4
D6
R4
TR
6
C2
R5
R6
TR
5
R3
D1
R7
TR
7
R8
R51
C5
TR
9 R9 TR
8T
R12
TR
10
TR
11T
R23
TR
24
TR
22
TR
21R
14 R16
R19
TR
20
R15
R16
R17
TR
19
R18
C6
D7
TR
14T
R13
C3
R12
TR
16T
R15
TR
17
R13
TR
31R
31
D31 D32
TR
32
R32C
ompa
rato
r
Com
para
tor
D34
D36D35
D33
SU
B
1 3 5 4 2 7 6 8
2122
916
1014
1511
1213
17 18 19 20
STK411-290E(IC821) : Front power amp.
Description of major ICs
SP-PW100
1-8
NJM4580D(IC811, IC812, IC813) : Dual ope. amp.
V+
INPUT+
V-
OUTPUT
A OUT
A -IN
A +IN
V -
1
2
3
4
A B
(TOP VIEW)
8
7
6
5
V+
B -IN
B +IN
B OUT
1. Pin layout
2. Block diagram
TC74HCU04AP(IC851) : 2Ch NOR gate
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1A
1Y
2A
2Y
3A
3Y
GND
VCC
6A
6Y
5A
5Y
4A
4Y
A
L
H
Y
H
L
1. Pin layout & block diagram 2. True table
SP-PW100
2-1
5
3
4
2
1
A B C
MA
INS
PLU
G
PO
WE
RP
OW
ER
TR
AN
S
PO
WE
R-S
UP
PLY
C
IRC
UIT
PO
WE
R A
MP
IC 8
21
VO
LUM
E
FW
801
INP
UT
(LO
W-L
EV
EL)
INP
UT
(HIG
H-L
EV
EL)
OU
TP
UT
(SP
EA
KE
R-O
UT
)
L /M
ON
O
IC 8
13
PH
AS
E S
WN
OR
MA
L--
RE
VE
RS
E
IC 8
51
CN811
B+
CN881
SP
EA
KE
R
OU
TIN
9V RG
E.
PR
OT
EC
T
MU
TE
IC 8
11
IC 8
13
B+
Q88
01
Q82
01Q
8202
Q82
03 RE
GU
LATO
R
Q87
01Q
8702
IC 8
12
DC
-DE
T
MU
TE
PR
OT
EC
T
DC
-DE
T
RY
881
CN881
CN
891
CN
851
CN
861
RE
DG
RE
EN
IND
ICAT
OR
DC
-DE
TC
TOR
IN P
UT
L /
H A
MP
& H
.P F
ILT
ER
L.P
FIL
TE
R
FW
801
CN821
IN P
UT
L /
H A
MP
LED
CO
NT.
Block diagram
SP-PW100
2-3
Standard schematic diagram
Parts are safety assurance parts.When replacing those parts makesure to use the specified.