    
Ou812
New member
Username: Ou812
Post Number: 9
Registered: 11-2006
| | Posted on Monday, February 26, 2007 - 10:22 pm: | 
|
McKinley AM\SSB PC385AA Board
Test IC(TA222P AF Output)
Pin 1= 13.75v RX \ 13.10v TX
Pin 2= 6.60v RX \ 6.29v TX
Pin 3= 0v RX \ 0v TX
Pin 4= 0v RX \ 0v TX
Pin 5= 1.15v RX \ 1.15v TX (LOW)?
Pin 6= 1.15v RX \ 1.14v TX (LOW)?
Pin 7= GND
Pin 8= GND
Pin 10= 13.01v RX \ 12.36v TX
IC5 MB3756 Voltage Regulator \ Switch
Pin 1= 8.20v RX \ 8.20v TX
Pin 2= 13.76v RX \ 13.22v TX
Pin 3= 8.21v RX \8.21v TX
Pin 4= GND
Pin 5= 13.75v RX \ .041v TX (LOW)?
Pin 6= 8.20v RX \ .023v TX (LOW)?
Pin 7= NO Conn.
Pin 8= .191v RX \ 8.19v TX
Pin 9= 6.85v RX \ 6.52v TX
Misc Electrolytic Caps Tested (Removed from board).
1= C120=ok
2= C119=ok
3= C118=ok
4= C114=ok
5= C107=ok
6= C112=ok
7= C133=ok
8= C164=ok
9= C72=ok
10= C134=ok
11= C15=ok
12= C17=ok
13= C16=ok
CANNOT GET DRIVER BIAS below 50 mA ????
Retuning of Coils L26, L27, L28, L29, L36 With 3000hz tone into Mic
pulled mod meter upto approx 90% Max
Peak Watts at 9 and Average Watts @ 4 on Channel 19 AM
Approx. 50 % Mod Channel 19 USB Aver Watts 4 Peak @ 9 Watts
Any Ideas??? |
