JBL BASS550 Service Manual page 14

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
Change Description
PCB1165 & PCB1166.
& PCB1166.
(Speaker Out).
Revisions
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.
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