[Elecraft] Alignment and Test, Part II

[HB9DUT]

Hi,

thank's for all the good pieces of advice. Unfortunately up to now 
without success...
I accomplished the following steps:

- checking all parts of  correctness and correct value: -> ok
- checking each solder point: -> ok
- checking solder points of T5 and the thermistor board with an DMM -> ok

i have also checked all DC voltages from the IC's in the PLL section:

Ref.    Pin      VDC      my K2
--------------------------------
U3      6         4.3         4.2
           7         8.0         8.0
           8         0.0         0.0

U4      1         2.1         2.1
           2         2.4         2.3
           3         0.0         0.0
           4         2.3         2.3
           5         5.0         5.0
           6         5.0         5.0
           7         0.0         5.0  **
           8         0.1         0.6  **
           9         0.0         0.0
         10         0.0         0.0
         11         0.0         0.0
         12         0.0         0.0
         13         4.0         0.0  **
         14         5.0         5.0
         15         5.0         5.0
         16         5.0         5.0

U5      1         0.0         5.0 **
           2         5.0         0.0 **
           3         5.0         5.0
           4         5.0         5.0
           5         0.0         0.0
           6         2.0         2.0
           7         0-4         4.0
           8         5.0         5.0

U6      1         0-8         8.0
           2         0-4         4.0
           3         0-4         4.0
           4         0.0         0.0
           5         4.0         4.0
           6         4.0         0.0  **
           7         0-8         8.0
           8         8.0         8.0

** this values are outside of the specification

The 12 MHz Reference Oscillator is working with an range of  12.3 kHz.

Does someone have still further tips where I to search could?

73 de Peter