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mike49504 27th December 2010 04:18 AM

ORION HCCA 250 POP_TOP
 
This amp's power light comes on and i have 10 volts DC on 1 channel and the other channel doesnt produce sound.

Light is on but i dont think the amp is powerd up all the way or something heres what i have on the power supply fets. K1542

Leg1:0
Leg2:13.8
Leg3:0

TL494

1:0
2:0
3:0
4:5.94
5:0
6:0
7:0
8:0.32
9:0
10:0
11:0.32
12:0.32
13:0
14:0
15:0
15:0

Any ideas?

Perry Babin 27th December 2010 05:42 AM

Do you read 0 ohms across the thermal switch?

mike49504 27th December 2010 05:52 AM

Yes The one on the bottom of the board with 2 leads it measures 0.1 ohms

Perry Babin 27th December 2010 06:01 AM

Follow it back to an MPSA06. Give me the voltage on that transistor.

mike49504 27th December 2010 06:04 AM

MPSA 56
Leg1:13.94
Leg2:13.94
Leg3:0.65

Perry Babin 27th December 2010 06:15 AM

Does this amp have only one opto-coupler?

If so, it's likely switched on with an A06 driving the A56. If there's an A06 near, post the voltage on it.

mike49504 27th December 2010 06:23 AM

yeah theres only 1 opto-coupler.

The mpsa06
leg1:0
Leg2:0
Leg3:13.94

Perry Babin 27th December 2010 06:27 AM

Are you sure that you have remote voltage?

If so, follow the circuit to make sure that the remote voltage reaches the resistor network near the A06.

mike49504 27th December 2010 06:32 AM

Yes i have remote voltage . The voltage reaches the resistor network it connects to pin 8 (13.94 volts)

Perry Babin 27th December 2010 06:34 AM

Post the voltages on the resistor network.

Does pin 7 connect to the center leg of the A06?


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