HP 7475a - Page 58

Model 7475A
1-A-2-IA
D
--7 >-
4
•
49
SCHEMATIC DIAGRAM NOTES (Continued)
Light Emitting Diode (LED).
Photo-Transistor.
Cable and circuit assembly connectors.
J - Fixed Portion
P - Moveable Portion
Circuit assembly square-pin connectors.
Operational Amplifier (integrated circuit).
Voltage regulator (breakdown diode).
Denotes Field Effect transistor (FET) with N-type base.
Denotes FET with P-type base.
Denotes Silicon Controlled Rectifier (SCR).
Denotes spring-loaded switch.
Indicates twisted pair.
Identifies service sheet for quick reference .
Signal line identification.
Combined service sheet and signal line identification.
Figure 6-22. Schematic Diagram Notes (Sheet 2 of 2)
Section VI
6-19