25
DVR 50 - Rev. 011105-2
Replacing the DVR 50 MPEG board:
DVR 50 MPEG board
Rev. 2
Ref. No.
Item No.
Part description
PCS.
Remarks
1
74104
PCB assy MPEG board DVR-50
1
Rev.
≥
4
•
Disconnect the power cord from the AC outlet and take all necessary ESD precaution.
• Remove
the lid. (See instructions under Lid)
• Disconnect
all
cables.
•
Dismount the tuner. (See instructions under Tuner)
• Unscrew
all screw holding the in- and outputs on the rear panel. (Look under System
overview)
•
Unscrew the MPEG board and replace it with a new. See picture 44-0398/4
• Reassemble the DVR 50 unit in the reverse order of disassembling it!
•
Test the DVR 50 unit.
Note!
Early models (approximately 30 units) got a sliced up Audio - MPEG cable. Special care should
be taken when refitting it after service. The sliced cables are only seen on Rev. 2 boards. See
picture 44-0401/4
Board revision numbers:
All electronic modules are labeled with a part number.
At the end of the part number you will find the revision number.
Revision 2 board: P/N: 30XXXXXXX – 02
Revision 4 board: P/N: 30XXXXXXX – 04
There are no revision 3 Audio- and MPEG boards!
DVR 50 units with a serial number lower that S/N: 3001001697 are produced with Rev. 2
Audio- and MPEG boards. DVR 50 units with a serial number higher than S/N: 3001001697
are produced with Rev. 4 Audio- and MPEG boards.
Functionally is basically the same but Rev. 2 boards and Rev. 4 boards are not interchangeable.
In case of fault Rev. 2 Audio- and MPEG boards both the Audio and MPEG board must be
change. Remember to order new Rev. 4 cables as well. Item No. 74120 and Item No. 74121.
Note! Rev. 2 boards are not available.
Fig. 44-0401/4
Fig. 44-0398/4
