Revisions - JBL BASS550 Service Manual

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REF. NO. PART NO.
R31, 32 RS1715
R36 RS1912
R37, 39, 40 RS1767
R42 RS1702
R46, 47 RS2180
Thermistor
TH1 TH1006
Transistors
Q1, 1A TR1057
Q2, 2A TR1061
Q3, 3A TR1183
Q4, 4A TR1184
Q5, 5A, 8, 8A, TR1166
13, 13A, 15
Q6, 6A, 7, 7A, TR1167
14
Q9, 95 TR1063
Q10, 10A, 11, TR1108
11A
Q12, 12A TR1131
Wires
JW1-5 WI1623
JW6, 9, 10, 11 WI1553
Miscellaneous (See Exploded View)
1 BR1187
2 BR1386
3 BR1395
Date Revision
1/29/97 01 A) Changed R6, A, C from 27K to 24.3K 1% on PCB1164.
B) Changed R6B from 27K to 15K on PCB1164.
C) Changed R5, A, C from 2.7K to 4.32K 1% on PCB1164.
D) Changed R5B from 2.7K to 7.5K on PCb1164.
2/5/97 02 A) Changed R33, R34, R35 from 10K 5% to 10K 1% on (2)
B) Changed R36 from 11K 5% to 11.3K 1% on (2) PCB1165
3/3/97 03 A) Identified Polarity Power Cord.
3/11/97 04 A) Changed R7 from 4.7K to 10K on PCB1164.
B) Changed R26 from 10K to 4.7K on PCB1164.
C) Changed R30 from 1K to 2.2K on PCB1164.
D) Changed R31 from 470 to 220 on PCB1164.
E) Delete JW9, JW10, JW11 on PCB1163.
F) Add F3, F4, F5 on JW9, JW10, JW11 on PCB1163.
G) Changed R1 from 1K to 15K on PCB1163.
H) Delete R2 and Add ZD1, 10V in the same place on PC1163.
I) Add C26, C27 of 0.01µF 100V on PCB1163.
J) Add C22, C23, C24, C25 from 4700ρF on PCB1164
DESCRIPTION
SMD 5.6KΩ 5% 1/8W
SMD 11.3KΩ 5% 1/8W
SMD 1MΩ 5% 1/8W
SMD 100KΩ 1% 1/8W
M/O 470Ω 5% 1W
NTC 10KW @ 2 5DegC
NPN POWER TIP35CTO-218
PNP POWER TIP36 TO-218
NPN POWER TIP31 TO220
PNP POWER TIP32 TO220
PNP 2N5401 TO-92 T/R
NPN 2N5551 TO-92 T/R
NPN MPS2222A TO-92
SMD NPN 2SC2412K CP PKG
SMD NPN DTC1124TK 10K CP
#16 SOLID UL1569 GREEN
#22 BARE SOLID TINNED
0.66 FOOT
Alum. Bar 4.8x12.7x40mm
Transistor Bar TO-218
Bracket Power Support
Change Description
PCB1165 & PCB1166.
& PCB1166.
(Speaker Out).
QTY REF. NO.
2 4
1 5
6
3
7
1
8
2
9
10
1
11
12
2
2
13
2
14
2
15
7
16
17
5
18
19
2
20
4
21
2 22
23
24
8
25
4
26
27
28
29
4
30
2
31
6
32

Revisions

PART NO. DESCRIPTION
BR1411 Bracket Support 60 Deg
BR1421 Bracket "L" 0.9"x0.9"
BR1423 Front Plate
BR1495 Alum. Bar
SEE FUSES
FH1002 Fuse Holder 1/4x1-1/4
XX1174 AG AC Cord 6ft. UL/CSA aprov. 120V
WI1597 AG AC Cord 6ft. UL/CSA aprov. 230V
HS1142 Heatsink Internal
MI1151 AG Power Transformer 120V
m1159 AG Power Transformer 230V
ST1025 Round Spacer 1/2x3/8 length
SW1075 JR Switch Rocker 2P2T Snap-I
XX1259 Knob Black (not shown)
XX1269 Gasket
XX1276 Plastic Cover
NU1059 Nut 4-40 Keps-Thr. Hexag. Zinc
NU1057 Nut 6-32 Keps Zinc Hexag.
NU1049 Nut 8-32x1/4 Keps Hexag.
WA1049 Washer Ext. Tooth #6 Zinc
WA1080 Washer Flat #8 Steel Zinc
XX1250 Strain Relief SPT-1 Black
SC1253 Screw 4-40x3/8 Pan Phillips
SC1274 Screw 5-20x1/4 Thread Form. Z.
SC1192 Screw 6-32x3/4 Cutt-Thr. Hex.
SC1194 Screw 6-32x3/8 Tapt-Thr Hex.
SC1282 Screw 10-32x7/8 Pan-Torx Hd.
SP1073 Sil Pad TO-3P 1/0"x0.75"
SP1072 Sil Pad TO-220 0.750"
ST1024 1/4 Hex Fem. Standoff 1-1
332630-001 13 Pin Interconnect Cable
Reason of Change
Changes required by Engineering
Changes required by Engineering
A, B, C, D = Power On Sensitivity.
E, F = Protection On Voltage.
G, H = POP On Power Off.
BASS550
QTY
1
1
1
1
1
1
1
1
1
6
1
1
1
1
2
2
5
10
5
1
2
6
8
17
6
12
3
2
1
1 0