Removing The Amp Pcb From The Main Pcb - Marantz M-CR611/U1B Service Manual

Removing the AMP PCB from the MAIN PCB

Pay close attention to the following two points when removing/attaching the AMP PCB to the MAIN PCB during servicing.
1. Wait for approximately 5 minutes after turning the power off before removing the wire connector that connects the
SMPS PCB and AMP PCB.
When connected to the SMPS PCB wire connector, a surge current may flow due to the charge stored in the AMP PCB
causing damage to the D-AMP IC500 and IC502.
2. When attaching the AMP PCB to the MAIN PCB connector, insert the connector pins into the AMP PCB in advance, and
securely connect while checking that the position is correct.
If the MAIN PCB and AMP PCB terminals are connected incorrectly (if the connection pins are misaligned), the PWM
Processor IC108, D-AMP IC500 and IC502 may be damaged by the charge stored in the condenser.
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