Seek advice on Marantz 1180 Dc amplifier high DC out put at left speaker channel
Does anyone has the marantz 1180 DC -- please help me to confirm my doubt on the circuit.
My amp has the transistor Q854 removed.In its place at the collector (C) point is soldered a 51 ohm resistor connected in series to a diode RM 11 and a capacitor shorting to a runner. -- is this normal. I m not the first owner of this amp.
My amp has a +ve 45 V supply and a -ve supply of 53 V . Both shd be 45 V.
The dc out put at the left channel adjusted lowest to ,is 3.8 V while thr rt channel is OK.
When the amp is powered on the left speaker is being pushed outward and stay on.
I hv checked out all resistors and transistors at the main amp board, comparing value between left and right channels. They are all OK ,except resistor R725 (lt channel) is
1512 ohm and R 726 at (rt ch) is 5740 ohm when measured on board. But when desoldered and measure, both the resistor measure 22K ohm -- which are Ok.
Can someone kindly help me with this problem