White_wolf
Active Member
Hello everyone, I just bought an A-60 at a local thrift store today. When I got home and plugged it in no sound out of it tried with different sources and speakers. Opened and looked for any damage, no burned parts or bulging caps found. Found that the protection relay wasn't clicking in. Went and found the service manual and started looking at the circuit for the protection. Then using a DMM with the amp on I checked the voltage at the relay coil and the voltage of the in coming signal to the relay. Also measured the resistance of the coil with the unit unplugged.
coil voltage = 41.1 V dc. The manual shows 40.5 to be the normal.
Voltage of the input sides of the relay = 63 and 64 V ac. Couldn't find the spec in the manual.
Coil resistance 1113 ohms this seems a little high but the sevice manual doesn't give a specification.
Any help would be appreciated.
coil voltage = 41.1 V dc. The manual shows 40.5 to be the normal.
Voltage of the input sides of the relay = 63 and 64 V ac. Couldn't find the spec in the manual.
Coil resistance 1113 ohms this seems a little high but the sevice manual doesn't give a specification.
Any help would be appreciated.