32
STAGEPAS 500
●
Trouble Shooting (POWER circuit board)
START
F801 (Fuse)
OPEN ?
Yes
No
< Fuse: Primary >
<+VB> about +44 V(DC)
?
CN804: 1 pin
Yes
No
CN804: 3 pin
Yes
No
about +15 V (DC)
?
CN802: 2 pin
Yes
No
about +5 V (DC)
?
CN802: 3 pin
Yes
No
about -15 V (DC)
?
CN802: 1 pin
Yes
No
Yes
No
Check
IC804,D816-819
and peripheral
IC804,D816-819
及び周辺の確認
Check
IC806 and peripheral
IC806及び周辺の確認
Check
IC805,D816-819
and peripheral
IC805,D816-819
及び周辺の確認
Check
Q556,D543,R594,R595
Q556,D543,R594,R595
の確認
<VDR> about -35 V (DC)
?
CN543: 3 pin
No
Check
Q557,D544,R596,R597
Q557,D544,R596,R597
の確認
<VDR> about -35 V (DC)
?
CN545: 3 pin
1
2
Yes
< Power Supply: +VB >
< Power Supply: -VB >
< Power Supply: +15 V >
< Power Supply: -15 V >
< Power Supply: +5 V >
No Load
< L ch: VDR >
< R ch: VDR >
A
B
C
D
E
F
G
H
Connect the circuit boards. ("CONTROL3 (3/3): CN804-CN541", "AMP (L ch)", "AMP (R ch)")
"CONTROL3 (3/3)シート: CN804-CN541"、"AMP (L ch)シート"、"AMP (R ch)シート"を接続
<-VB> about -44 V(DC)
?
[無負荷]
< P
o
w
er Circuit Board >
< CONTR
OL3 (3/3) Circuit Board >
Note: Check and repair must be done carefully, otherwise the electrical shock may be caused.
[ 注意:感電するおそれがありますので、注意して作業を行ってください。]
*Discharge [
放電 ]
: +VB,-VB
*Disconnect AC plug from the wall outlet
before discharging electricity.
+VB (-VB)
PGND
820 3W
discharge
1 minute [1
分間放電
]
[放電を行なう前にACプラグをコンセントから
抜いてください。]
GND: 2124 820/50V (+)
GND: 2124 820/50V (+)
[ AMPシート ]
[ AMPシート ]