Servicing Etched Circuit Boards - HP 3400A Operating And Service Manual

Model 3400A
f. Leads on new thermocouples must be shaped before inserting into PC board. During
the shaping process, hold leads between bending point and glass with long-nose pliers.
h. Carefully insert new thermocouple leads and solder.
Table 5-7. Factory Selected Components
eee eee Pe
C205 Adjust low frequency (10 Hz) response. 100pF
(selected)
C302 Adjust high frequency (10 MHz) of Second Attenuator 12 pF 15 pF
on 0.001 V and 1 V ranges.
C304 Adjust high frequency (3 MHz to 10 MHz) of Second 24 pF 39 pF
Attenuator on 0.3 V and 300 V ranges.
C305 Adjust high frequency (10 MHz) of Second Attenuator
on 0.01 V and 10 V ranges.
moe pe a oe meee NOTE on schematic. 200 pF
—
Eee 9 [pala tenies ae voltage at collector of Q406 (with no signal in-
put) to 1.5V to 2.5V de.
5-40. SERVICING ETCHED CIRCUIT BOARDS
c. Component lead hole should be cleaned before inserting new lead.
Maintenance