Fault flow chart 2.
Fault symptom:
- Unable to play CD (test CD)
- No disc rotation
- Playback with SD card OK
- Cable connection to CD PCB OK
Possible causes:
- Focus problem
- PCB6, CD board
- PCB96, CD unit
Establish fault
symptom with B&O
Test CD
Fault symptoms
established?
Establish the fault with
customer’s CD
Check the disk for
visible defects
Report fault and send
the customer CD to
B&O for analyse
Clean lens with
isopropyl alcohol and
play disk
OK?
Measure supply
voltages to CD
mechanism
PCB2, IC00 pin5 - 5V
PCB2, IC003, pin4 - 9V
Measure connections
are correctly connected
Measure supply voltages
to CD mechanism
PCB2, IC000, pin - 6V
PCB2, IC003, pin2 - 2V
Change PCB6, SMPS
Change PCB96, CD
unit
Change PCB2, Master
Fault symptom:
- Regular dropouts/mute when
playing CD
- CD stops playing/rotating
- CD search problem
Possible causes:
- Tracking problem
- Dirty lens
- PCB6, CD board
- PCB96, CD unit
Establish fault
symptom with B&O
Test CD
Fault symptoms
established?
Establish the fault with
customers CD
Check the disk for
visible defects
Report fault and send
the customer CD to
B&O for analyse
Clean lens with
isopropyl alcohol and
play disk
OK?
Measure supply
voltages to CD
mechanism
PCB2, IC00 pin5 - 5V
PCB2, IC003, pin4 - 9V
Measure connections
are correctly connected
Change PCB6, SMPS
Measure supply voltages
to CD mechanism
PCB2, IC000, pin - 6V
PCB2, IC003, pin2 - 2V
No
Yes
Change PCB96, CD
unit
Change PCB2, Master
ABO-CENTER
v/HENRIKSENS
ELEKTRONIK
Содержание BeoSound 4 2851
Страница 19: ...Fault flow chart 2 11 Placement of magnet A B O C E N T E R v H E N R I K S E N S E L E K T R O N I K ...
Страница 20: ...2 12 A B O C E N T E R v H E N R I K S E N S E L E K T R O N I K ...
Страница 21: ...Service Mode 3 Not completed A B O C E N T E R v H E N R I K S E N S E L E K T R O N I K ...
Страница 22: ...3 Service Mode Not completed A B O C E N T E R v H E N R I K S E N S E L E K T R O N I K ...
Страница 54: ...5 30 A B O C E N T E R v H E N R I K S E N S E L E K T R O N I K ...
Страница 58: ...6 A B O C E N T E R v H E N R I K S E N S E L E K T R O N I K ...
Страница 69: ...A B O C E N T E R v H E N R I K S E N S E L E K T R O N I K ...