[R-390] Still deaf below 8 Mc

[Jim Green]

I'm still plugging away with my R-390/URR (Not R-309A/URR). The main  
struggle is the deafness below 8 Mc. I am following the Third Echelon  
troubleshooting procedure in TM11-5821-357-35. I've made it to Signal  
Substitution Part e IF sub-chassis tests Step 2 where the procedure  
is to apply a modulated 2Mc signal to E-210 with the receiver in  
standby mode. I am supposed to hear a signal in the headphones. I  
hear nothing. If nothing is heard the procedure is to:

1) check V205 (checks good),
2) check V701 (checks good)
3) check the V701 circuit components by voltage and resistance  
measurements. All voltages seem within range except Pin 1 at -0.46  
VDC (should be -1 VDC to -2.3 VDC). All resistances are OK except Pin  
1 at 178K (should be 150K) and Pin 5 at 19.8K (should be 8.5K,  
however the voltage at pin 5 is right on the money at 178 VDC).

Does anyone see any major issues with these readings? Note I'm using  
a Fluke model 77 to take the measurements.

4) Check the vfo operation by measuring the DC voltage at E210  
(measured 0.000 VDC). The manual goes on to say: The voltage should  
be between -3VDC and -11VDC. If the voltage outside these limits  
check J223 and P723. J223 looks OK, but the cable P723 is connected  
to has a kludjy splice in it. When I measure the voltage from the  
center pin of P723 to ground I get 0.000 VDC. Perhaps this is OK  
since it's likely an AC signal (I measured 0.01VAC). When I measure  
resistance I get a dead short to ground. Are these measurements normal?

Jim (KG9MM)