[forcemusicgroup]

TP7 value seems to be extremely high compared to what im supposed to be getting ---------12.15VAC where as its supposed to be 1.5vac

[forcemusicgroup]

TP7 at 0 makeup is 1.3vac and @+20 makeup is at 13.12vac

[JPK]

In which step do you get this result?

TP7 at -20 makeup
I assume you mean @0 MAKEUP.

You need to be more specific in your descriptions or I can't make any deduction.

[forcemusicgroup]

Yes at 0 make up those are the values 

[JPK]

You didn't reply to the question:
In which step do you get this result?
Without knowing the context I cannot make any deduction.

[forcemusicgroup]

step 1 voltages

v+ 15.2
v- 16.2
-12v 11.5
+12v 11.7

step 2

tp 1,2,3,4,11,12 =0VDC

step 3

tp12 = -2.9vdc

step 4

tp13 @-1.8vdc
      @2.9vdc

step 5 

tp4 @-15TH =0.21
    @+15TH =.058
TP5 @+15TH =.334VDC
      @-15TH =-2.221VDC
TP11@+15TH =.012
      @-15TH=-3.39
TP12@-15TH=3.4VDC
        @+15TH=0

STEP 6
TP1=1.5VAC
TP2=1.439VAC
TP3=1.51VAC
TP4=0.06VAC
DCV = -0.001

STEP 7
TP1=1.5VAC
TP2=0.470VAC
TP3=1.51VAC
TP4=0.217VAC
TP11=-3.39VDC
TP12=1.03VDC
TP13=1.59VDC

CHANNEL 2

-V = 16.21
+V = 14.77
-12V= 11.87VDC
+12 = 12.03

STEP 2 C2

TP6=0
TP7=0
TP8=0
TP9=0

STEP3 C2

TP6=1.5VAC
TP7=1.36VAC
TP8=1.5
TP9=0.06

STEP4 C2
TP6=1.5VAC
TP7=0.4VAC
TP8=1.5VAC
TP9= 0.2VAC

VDC U16 =.058

[JPK]

step 3
tp12 = -2.9vdc


In step 3 conditions, does the voltage on TP12 go to 0V when Makeup is at 0 ?
Without and with channel 2 installed?

[forcemusicgroup]

Yes. 0v with channel 2 installed and without... fluctuating no more than .5 -/+vac moving make up 0 to +15

[JPK]

Sorry, not understanding:
The voltage measured on TP12 are DC volts and without input signal (step 3).

[forcemusicgroup]

With make up @+20 I get -2.384vdc with second channel attached

-2.37vdc without board 2 attached 

[JPK]

What I need to know is: 

In step 3 conditions, does the voltage on TP12 go down to 0V when Makeup is at 0 ?
Without and with channel 2 installed?

[forcemusicgroup]

Yes

[JPK]

Channel 2 - step 3
Is TP7 still too low (1.36VAC instead of 1.5VAC) if you remove U17?
Check the resistor value (with power off, U16 removed, Trimmer T2 fully CW) between TP7 and U16 pin 6 : 5k7 ?
Check the resistor value (with power off, U16 removed, Trimmer T2 fully CCW) between TP7 and U16 pin 6 : 4k7 ?

[forcemusicgroup]

Will do stand by

[forcemusicgroup]

tp7 with u17 removed comes to 1.694 vac

[forcemusicgroup]

Check the resistor value (with power off, U16 removed, Trimmer T2 fully CW) between TP7 and U16 pin 6 : 5k7 ? = 5.682k ohm

Check the resistor value (with power off, U16 removed, Trimmer T2 fully CCW) between TP7 and U16 pin 6 : 4k7 ? 4.699 k ohm

[JPK]

tp7 with u17 removed comes to 1.694 vac
It seems that U17 is bad.
Try replacing it with U7.

[forcemusicgroup]

Ok changed. What should I be looking for

[JPK]

In channel2 step 3, is the level on TP7 back to 1.5VAC instead of 1.36VAC.

[forcemusicgroup]

Same. I noticed that when I changed out the chips that the volume changes channels. The 1646 chips are new from 
Mouser.

[JPK]

I noticed that when I changed out the chips that the volume changes channels.
Can you please explain? What change on what channel ?

[forcemusicgroup]

Moving and changing the 1646 from ch a to b 

[JPK]

The THAT 1646 must be defective.

[forcemusicgroup]

Well I've tried several. And still can't get a match. It's off by 1.7db

[JPK]

Sorry, I am out of ideas.
Do you want to send it to us for a check? Contact me here.