2.6 Fault flow chart
No
Yes
Confirm
PS_ON = 3.3V at
PCB04, P14 pin 7
OK?
Confirm
P15V = 15V at
PCB04, P14 pin 5
OK?
Connect to a source via:
Power Link, TOSLINK or line-in signal
Set role switch to R or L
Replace PCB35.1,
Amplifier
*
OK?
Replace PCB35.2,
Amplifier
*
Confirm
+28V at PCB04,
P16 pin 1, 2 and
-28V at PCB04,
P17 pin 8, 9
OK?
Confirm
+28V at PCB04,
P16 pin 1, 2 and
-28V at PCB04,
P15 pin 8, 9
OK?
Replace PCB30,
Digital Sound
Engine
Use ServiceTool to
calibrate the new
module
OK?
Replace PCB04,
Power Supply
OK?
Replace PCB02.1,
Input Panel
Remount PCB04,
Power Supply and
replace PCB30,
Digital Sound
Engine
Replace PCB04,
Power Supply
Replace PCB04,
Power Supply
Disconnect W8 from PCB35.2, P3.
C28V at PCB04, P17 pin 1, 2
and -28V at PCB04, P17 pin 8, 9
OK?
(Reconnect W8 after test)
Disconnect W6 from PCB35.1, P3.
C28V at PCB04, P15 pin 1, 2
and -28V at PCB04, P15 pin 8, 9
OK?
(Reconnect W6 after test)
Connect ServiceTool cable to
SERVICE connector.
Check connection between
PCB02.1, Input Panel and
PCB30, Digital Sound Engine
OK?
Repair/replace
connection
OK?
From
#1
Survey of plugs and pins - see page 2.11
*
Use ServiceTool to
autocalibrate the
new module
Содержание BeoLab 20
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Страница 28: ...4 4 Replacement of modules BeoLab 20 in service position 1 Pull to remove fabric frame ...
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Страница 68: ...Bang Olufsen DK 7600 Struer Denmark 3538228 14 04 353822814040000 ...