- Joined
- Apr 4, 2021
- Messages
- 33
Hi, I was given a Phase Linear power amp 700 series 2 from a cousin who passed away. I found the unit has issues. I may just sell it since I have other amps if the cost of repair tends to be high.
Heres the scoop:
The amp has been put away since 2004. Preliminary checked the amp and found the following. With no preamp connected or speaker loads, the L speaker fuses were blown. I found the left power switch as you face the front of the amp turns on the left meter/red indicator light on. But the right power switch when pushed in blows the amp speaker fuses to the left channel. As I view the rear of the unit tb inputs and outputs are labeled right and left. The left speaker fuses are the ones connected to that front right panel power switch. That power switch movement is not as crisp and firm as the other power switch to the left of it. I removed the left blown fuses and placed new AGX 5a fuses in the left speaker fuse holder and they blew.
So looking at the movement of the power switch that controls the left speaker fuse it does not move as crisp in and out when pushed as the other switch. Mounted onto the switch are two small resistors that leads up to the meter board. Will check them for value and if they are open. Would the switch be the obvious here and remove and replace the switch.
I did not want to go any further now before I download a manual etc.
Question. I thought about leaving the left channel speaker blown fuse out and turn the right power switch on and see if the right channel sensitivity control works on the sensitivity meter. Can this amp right channel be played and connected to a load / fused 8 ohm speaker to see if the channel actually works or is the the left channel associated with it that may cause further problems.
This 700 two has the following info sticker on the inside chassis side panel behind the fuse tb:
700 series Two 1100
Part 300-0053-0
7096
quant 150
unit 71
Facing front panel:
front panel has two vu meters l&R of center.
In center of front panel area two push button power switches.
Control /knob below each vu meter
Transformer to left side
8 heat sink fins at rear, column of resistors at rear between fins
on transformer - Phase Linear , Model 700, Serial 7A10886
Thanks in advance ...replies are appreciated
OZ
Heres the scoop:
The amp has been put away since 2004. Preliminary checked the amp and found the following. With no preamp connected or speaker loads, the L speaker fuses were blown. I found the left power switch as you face the front of the amp turns on the left meter/red indicator light on. But the right power switch when pushed in blows the amp speaker fuses to the left channel. As I view the rear of the unit tb inputs and outputs are labeled right and left. The left speaker fuses are the ones connected to that front right panel power switch. That power switch movement is not as crisp and firm as the other power switch to the left of it. I removed the left blown fuses and placed new AGX 5a fuses in the left speaker fuse holder and they blew.
So looking at the movement of the power switch that controls the left speaker fuse it does not move as crisp in and out when pushed as the other switch. Mounted onto the switch are two small resistors that leads up to the meter board. Will check them for value and if they are open. Would the switch be the obvious here and remove and replace the switch.
I did not want to go any further now before I download a manual etc.
Question. I thought about leaving the left channel speaker blown fuse out and turn the right power switch on and see if the right channel sensitivity control works on the sensitivity meter. Can this amp right channel be played and connected to a load / fused 8 ohm speaker to see if the channel actually works or is the the left channel associated with it that may cause further problems.
This 700 two has the following info sticker on the inside chassis side panel behind the fuse tb:
700 series Two 1100
Part 300-0053-0
7096
quant 150
unit 71
Facing front panel:
front panel has two vu meters l&R of center.
In center of front panel area two push button power switches.
Control /knob below each vu meter
Transformer to left side
8 heat sink fins at rear, column of resistors at rear between fins
on transformer - Phase Linear , Model 700, Serial 7A10886
Thanks in advance ...replies are appreciated
OZ
