Marshall DSL Voltage Chart

Below is the voltage chart for my own personal DSL. Most DSLs I’ve seen are pretty close to these voltages. This particular amp is a very early DSL with an Issue 1 board.

Voltages can vary from one amp to another depending on your wall voltage and variances of the power transformer in your particular amp.

My DSL has the Lydian Power and Output transformers and a choke.

V1: pin 1 = 195vdc  pin 6 = 110vdc  pin 3 = 1.9vdc  pin 8 = 1.45vdc

V2: pin 1 = 278vdc  pin 6 = 282vdc  pin 3 = 2.9vdc  pin 8 = 3.7vdc

V3: pin 1 = 389vdc  pin 6 = 240vdc  pin 3 = 242vdc  pin 8 = 1.59vdc

V4: pin 1 = 261vdc  pin 6 = 270vdc  pin 3 = 47.5vdc pin 8 = 47.4vdc

B+: 463vdc

You’ll notice that the V3 cathode voltage is a little high but this is the way these amps ship out of the factory.