Disconnecting/Connecting The Printed Circuit Board; Plug-In Board - Sony DNW-A220 Maintenance Manual

1-8. Disconnecting/Connecting the Printed Circuit Board

This section explains the disconnecting and connecting procedures for plug-in boards which have
switches or slit lands that need to be set.
For other circuit boards, refer to the maintenance manual Part 2 Volume 1.
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Before disconnecting or connecting the plug-in board, be sure to turn off the power. To turn off the
power, be sure to disconnect the battery or the cable connected at the DC IN connector, in addition to
turning off the power switch.

1-8-1. Plug-in Board

c
The unit is equipped with shielding springs which have sharp edges.
Do not touch them with bare hands. Pay careful attention when servicing.
Disconnecting
m
. Harness routing differs depending on the serial number of the VTR.
. Before pulling out the AU-249 board, disconnect the harness from CN1 on the AU-249 board.
. When extending AU-249 board using an extension board (EX-617), remove the upper frame and
unclamp the above-mentioned harness before extending. (Refer to Section 1-6-3.)
[Applicable serial No. for DNW-A220 (SY) : 31001 thru 31230, 51001 thru 51230]
[Applicable serial No. for DNW-A220P (SY) : 31001 thru 31270, 51001 thru 51270]
. Before pulling out the SDI-23 board, disconnect the three SDI cables (red, yellow, and orange).
When disconnecting the SDI cable, do not pull the cable itself. Be sure to hold the plug portion.
. When extending the SDI-23 board using an extension board (EX-617), remove the upper frame and
unclamp the above-mentioned SDI cables before extending. (Refer to Section 1-6-3.)
SDI-23 board
DNW-A220
DNW-A220P
AU-249 board
1-8. Disconnecting/Connecting the Printed Circuit Board
OK
Hold the plug portion
NG
Do not pull
the cable
Disconnecting the SDI cable
1-23