JBL BASS550, Руководство по обслуживанию

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Revisions
Date Revision Change Description Reason of Change
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. Changes required by Engineering
2/5/97 02 A) Changed R33, R34, R35 from 10K 5% to 10K 1% on (2)
PCB1165 & PCB1166.
B) Changed R36 from 11K 5% to 11.3K 1% on (2) PCB1165
& PCB1166.
Changes required by Engineering
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 0.01
µ
F 100V on PCB1163.
J) Add C22, C23, C24, C25 from 4700
ρ
F on PCB1164
(Speaker Out).
A, B, C, D= Power On Sensitivity.
E, F = Protection On Voltage.
G, H = POP On Power Off.
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