33
STAGEPAS 500
Power LED = ON
?
Yes
No
Replace the AMP circuit boards.
AMPシートを外す
1
Remove the AMP circuit boards.
Power LED = ON
?
Yes
AMPシートの交換
No
Q548:
Base = 0 V
?
No
Check
R577–579, 584–587
Q550–553
C563, 564
Yes
R577〜579, 584〜587
Q550〜553
C563,564 の確認
R563,567,570,571,574〜576,535
Q546,547,558,559
C559,562,
D541,542 の確認
Check
R563,567,570,571,574–576, 535
Q546,547,558,559
C559,562,
D541,542
OUTPUT OK
?
Yes
No
END
Q545:
Base = 0.6 V (DC)
?
Yes
No
Replace the AMP circuit boards.
AMPシートの交換
Check
R564–566, 568,569,572,573
R580–583, 598
Q541–545, 548
C561
R564〜566,568,569,572,573
R580〜583,598
Q541〜545,548
C561 の確認
Replace the POWER circuit board.
POWERシートの交換
2
"CONTROL1(1/3)シート"、"DSPシート"、"CONTROL2(2/3)シート:CN542-CN24" 及び FAN を接続
Connect the circuit boards("CONTROL1 (1/3)", "DSP", "CONTROL2 (2/3):CN542-CN24") and a fan.
Q548:OFF
Q548: ON
( Q545: ON )
( Q545: OFF )
< Power LED >
( Q549: ON )
CN544: 11 pin
(CN546: 11 pin)
< Signal Path >
< FAN >
I
J
K
L
< CONTR
OL3 (3/3) Circuit Board >
( Q549: OFF )
< AMP:Operate Mode>
Power LED=BLINKING
?
No
Yes
[
点滅]
[
点灯]
[
点灯]
POWER switch: OFF ON
Power LED=BLINKING
?
No
[
点滅]
Yes
