Service manual

94 Replaces page 22
Table 3-3. Test Points (continued)
Test Point
Number
Signal Measurement and Conditions
U308-1
CV PROG In VOLT MODE, + 10V with full rated voltage programmed;
+0.5V with 3 volts programmed.
In CURR MODE or RES MODE (middle and high ohm ranges), + 13V.
In RES MODE (low ohm range), 0 to +10V depending upon resistance value
programmed.
U308-7
CC PROG In CURR MODE, + 10V with full rated current programmed.
In VOLT MODE, RES MODE (low ohm range), or with INPUT
OFF: -13V.
In RES MODE (middle and high ohm ranges), 0 to + 10V depending upon
resistance value programmed.
U315-1
TRANS_EN High level with transient operation programmed on (TRAN ON).
Low level with transient operation programmed off (TRAN OFF).
U324-1
SLEW In CURR MODE, -10V with full rated current programmed; 0V
with zero current programmed.
In VOLT MODE, -10V with full rated voltage programmed; 0V with zero voltage
programmed.
U309-16
DAC_REF Low level in CURR or VOLT MODE. High level in RES MODE (any range).
U309-8
CR Low level in RES MODE (low ohm range). High level in CURR, VOLT, or RES
(middle or high ohm range) MODE.
U309-1
CG Low level in RES MODE (middle or high ohm range). High level in CURR, VOLT,
or RES (low ohm range) MODE.
TB301-9
PORT High level with PORT0 ON programmed. Low level with PORT0 OFF
programmed.
U329-4
-10V Ref -10V (9.95 to 10.05V).
U323-1
+ 12V Ref + 12V (11.28 to 11.44V).
POWER BOARD
U14-5
IPROG Under normal operating conditions (input is regulated) measurement should be:
-0.1V X Iin (e.g. -0.1V X 6 = 0.6V).
With input unregulated or disconnected, the measurement will be:
- 7V in CURR Mode.
+0.9V in VOLT or RES MODE.
cath-D17
+ OV + 14V when OV condition is false (normal).
-13V when OV condition is true.