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AX-M9000
Power AMP board
CN402
CN401
TB403
TB404
Signal
processing
board
Removing the power AMP board
assembly / heat sink (See Fig. 13 to 15)
Prior to performing the following procedure, remove
the metal cover, system control assembly and rear
cover.
1.
Remove the six through bolts S attaching the heat
sink and the heat sink cover.
2.
Remove the eleven screws T attaching the power
AMP sub-board assembly.
3.
Disconnect the harness, which is extending from
power transformer, from the connectors TB401,
TB402, TB403 and TB404.
4.
Disconnect the harness, which is extending from the
power transformer for pre-AMP, from the connectors
CN401 and CN402.
5.
Disconnect the harness, which is extending from the
fan, from the connector CN453.
6.
Disconnect the harness, which is extending from the
signal processing board, from the connector CN301.
7.
After removing each screw U attaching the power
AMP sub-board assembly (1) & (2), take off the
power AMP sub-board assembly from the heat sink.
8.
Remove the seven screws V attaching transistor
Q335~Q340.
1-6
TB402
TB401
T
CN301
11
Heat sink cover
Fig.13
CN453
S
Power AMP sub-board
assembly (1) (2)
Power AMP board
U
Heat sink
Fig.14
V
Transisitor Q335~Q340.
Fig.15
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