fix repair ebay find SG382 SRS rf signal generator and SG385 power supply

SG382 DC-2.025Ghz Stanford Research Systems

symptoms no 10Mhz at the rear output

front panel not responding

photos taken at later date but 

when i opened it for the first time it was covered

with heavy layer of soot black residue 

no scheme but there is the circuit description

which for this case was just enough

some pictures of the boards

the rear 10Mhz was fixed after replacing a faulty resistor 

R101 4.99kohm on the main motherboard
didnt have smd so i used a regular size instead 

but as long as it fixed the problem i was happy with it

the front panel was fixed after a short reflow of the spi ic's (U308, U309)

during the repair process i also accidentally shorted something

on the dc dc power supply SG385 (15V, 5V, 3.3V, -5V, -15V)

after some probing seeing half the expected voltages 

which was strange i traced the problem to LM358

which was shorting it was for the temp control 

also replaced the fan which looked tired