Panasonic VDR-M70EG Service Manual page 73

(14) AEL-H/AEL and MAN-H/MAN Circuit Boards
Note:
Before replacing the MAN-H/MAN circuit board, always perform "4-9-2 EEPROM data backup
and write".
1) Disconnect the two flat cables.
2) Disconnect the DRF-H/DRF circuit board (c) from MAN-H/MAN circuit board (b).
3) Remove three screws [G].
4) Remove the AEL-H/AEL circuit board (a) that is assembled with MAN-H/MAN circuit board in
the direction of the arrow: It may be difficult to remove these circuit boards, since the heat sink
rubbers (e) on MAN-H/MAN circuit board may stick to the frame (d).
5) Remove the AEL-H/AEL circuit board from MAN-H/MAN circuit board in the direction of the
arrow.
Note:
Do not scratch the surface of IC2009 or IC2010: The surfaces of IC2009 or IC2010 are silicon
substrate (silicon wafer) that is semi-conducting. Scratching them could cause fault in operation.
Procedure and caution for reassembly
1) Be sure to paste the two heat sink rubbers (e) on the MAN-H/MAN circuit board: Neglecting to
paste the heat sink rubber could cause a fault.
2) Connect the MAN-H/MAN circuit board and AEL-H/AEL circuit board, and then attach them to
the frame. If the MAN-H/MAN and AEL-H/AEL circuit boards are attached to the frame
independently, a connection fault could result.
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(d)
1)
(b)
[G] M1.7x3 (Gold)
3) [G]
VDR-M70EG / VDR-M70EB / VDR-M70GC / VDR-M50EG / VDR-M50EB / VDR-M50GC
2) (c)
e
3) [G]
5)
4)
Fig. 5-3-17
73
(a) AEL-H/AEL circuit board
(b) MAN-H/MAN circuit board
(c) DRF-H/DRF circuit board
(d) Frame
(e) Heat sink rubbers
e
(b)
IC2010
IC2006
IC4106
IC2009
IC4002
IC2010
VDR-M70PP
(2)
(a)
(1) Unloc
(2) Pull
(1)
VDR-M50PP
3) [G]
k