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Removing the regulator board / the rear -Rch amplifier board (See Fig.10 and 11)
Prior to performing the following procedure, remove the top cover. 1. Disconnect the harness from connector CN831 on Volume control the main board. board
CN512 Main board CN511 Regulator board Tie band Tie band
Main board CN831
2. Remove the two screws H attaching the regulator board to the heat sink. 3. Disconnect the harness from connector CN511 on the main board and CN512 on the volume control board. Cut off the three tie bands fixing the harnesses. 4. Remove the two screws I attaching the rear-Rch amplifier board to the heat sink.
Rear-Rch amplifier board
Regulator board Rear-Rch amplifier board
Removing the main board (See Fig.12 and 13)
Prior to performing the following procedure, remove the top cover, the rear panel, the relay board and the preamplifier board. 1. Disconnect the card wire from connector CN811 on the main board. 2. Unsolder each harness connecting the power transformer and the main board. 3. Unsolder the power cord on the main board. 4. Remove the eight screws J board to the heat sink. 5. Remove the eight screws K board. attaching the main
Main board CN811 Speaker switch board
FW902 Power transformer
attaching the main
6. For the harness extending from the speaker switch board, unsolder FW902 on the main board.