Heraeus
VOTSCH
HC 2020 - HC 2057
SERVICE
MANUAL
1.2 Circuit diagrams
The circuit diagrams have been compiled on a device-specific basis.
Coordinates 1 to 8 represent current paths.
Various fields at the bottom of the circuit diagrams give the following infor-
mation from left to right.
1.2.1 Revision
1.2.2 Validity
1.2.3 Marking
1.2.4 Cross references
The revision field lists the date of revision and the serial revision index.
Circuit diagrams thus becoming outdated are listed in the chapter
"modifications".
The various device types to which the circuit diagram is applicable are
listed in the description
field.
If the circuit diagram is applicable to all device
types,
the chamber designation is omitted.
The ID no. represents a circuit diagram registration number. Circuit dia-
grams which are applicable to all devices are also provided with a language
specification in addition to the ID no.
E.g. "d" for German; "e" for English
Page numbers define the extent of the circuit diagrams.
The circuit diagrams include cross references to the individual circuit dia-
gram sheets.
These cross references are marked by a slash and the applicable current
path and sheet number designation.
E.g. sheet 1/9 includes a cross reference PE / 3.1.
This means: /3.1
Connections continued-
on sheet 3
current path 1
Sheet 3, on the other hand, includes the appropriate return cross
reference/1.8
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