HEIDENHAIN TNC 407 (243 020) Service Manual - Manual (Page 41)

31-O
SERVICE MANUAL TNC
issue:
01.09.1995
Page 34
8.3 Power Supply of the NC Part
The power supply line for the NC is connected to the terminals of X31.
The different voltages for the LE are transformed from the voltage fed in the POWER SUPPLY
assembly. (see block diagram, sec.
The input and output voltages are displayed by The states of the individual voltages are only displayed
approximately by the The exact values must be measured, and the measured values must correspond
to the following table:
output
+ 5.2 + 5.18
+ 12 + 11.4
+ 15 + 14.4
- 1 5 v -15 1 4 . 4
u + 4.5 + 3.7
+ 12.3 + 12
+ 4.75
+ 5.22
+ 12.6
+ 15.6
1 5 . 6
+ 12.6
+ 5.25
2.5
0.15
0.3
0.15
20
1.5
0.3
1) + 12 V BE is not required for TNC
2) + 5 V 1 is a potential-free voltage.
NOTE:
Always switch off the main switch before engaging or disengaging any connectors,
The power supply unit does not function during free run (basic load is required).