Case #456650 . 06/30/2026 . Hafler DH-200 amplifier , no right channel. Just some burst of noise . Left channel is ok.
All transistors , diodes, zeners ans capacitors in right channel are good. No reason to change them. Found open resistor R111 39KOhm ( voltage divider for base voltage of Q3 transistor). Unusual failure for this model.
