[Amps] Bird Wattmeter 4314 info needed

[N5bbc at aol.com]

Looking for a schematic for a Bird 4314 (no suffix) peak reading board,  also 
parts layout would be helpful.  XYL bought used meter for my birthday  
present, always wanted one, average works OK but peak seems to have a bias  
problem-meter reads full scale when in peak mode.may be a voltage regulator  board 
missing also. Wires from external power jack are internally  disconnected . As 
you can tell I'm not very familar with Bird products. 
 I downloaded 4314-B info from Bird website but schematic seems very  
different.
 TNX  Ed N5BBC