Sony STR-DE845 Training Manual page 44

11. Troubleshooting Driver Amplifier & Bias Network Circuits
Once you have located the bad channel, it is time to shotgun (due to very few components) all the active components
(diodes or transistors) in the bias network. Shotgunning is preferred since intermittent bias components can
cause expensive damage to the Power Amplifier. While changing the active components, carefully inspect all
resistors and potentiometers. Now it is time to verify that the unit does not draw excessive current while following
the power relay bypass procedure.
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