Bazooka EL1500

[mike49504]

Im working on this amp also. When i power it up the light comes on for a few secs and shuts off.

I tested the output for DC and have 0.68 volts on the output with no Outputs in the amp.

I have -14.68 volts on the op-amps but no + voltage on them.

On the rectifiers this is what i have

U1620
1:-1.48
2:-1.52
3:-1.35

U1620R
1:-.068
2:-71.4
3:-0.69

[Perry Babin]

What DC voltage do you have on the RCA shield?

Black probe on the amplifier's ground terminal.

[mike49504]

On the rca shield when first powerd up it has 1.23 volts then drops to 0.23 volts

[Perry Babin]

Measure the resistance between the RCA shield, the secondary center tap and the negative speaker terminal. Do you read 0 ohms between all of those?

[mike49504]

yes from rca shield to negative terminal 0.2 ohms and from secondary center tap to rca shield 0 ohms

[Perry Babin]

Measure the DC voltage on the rectifiers again but place the black probe on the negative speaker terminal.

[mike49504]

U1620
1:-1.45
2:-1.52
3:-1.42

u1620r
1:-0.70
2:-71.4
3:-0.71

[Perry Babin]

If you measure from the outer legs of the positive rectifier to the outer legs of the negative rectifier, do you read 0 ohms?

Place the probe on the legs as close to the body of the rectifier as possible.

[mike49504]

U1620 to U1620R

Leg 1-1:0l Reverse probes : 5.92 ohms

Leg 3-3:Ol reverse probes OL

[Perry Babin]

I think you have broken solder connections or broken legs on the positive rectifier.