Oven Circuit Voltages - HP 5334B Service Manual

1 0 v SUPPY
-
THERAL
FUSE
20-30V INPUT
U2
F
1
J
v
t
CURRENT
TEMPERATURE CONTROL AND
SENSE HEATERS.
RT1. U3
b
m
U l A . 0 6 . 7 . 8
T
WARMUP
-
CURRENT
L I M I T
U10. CR6
Table 8-11. Oven Circuit Voltages*
*
Voltage reading taken with oven supply voltage of 20V dc and insulating foam and cover removed.
Voltages are approximate and will vary slightly from unit to unit.
VOLTAGE POINT
4 6 8
Q6c
Q6E
478
Q7C
Q7E
Q8B
Q8c
Q8E
U1 Pin 1
U1 Pin 2
U1 Pin 3
U1 Pin 5
U1 Pin 6
U1 Pin 7
U2 Pin 2
U3 Pin 6
OVEN A T
OPERATING TEMP.
1.6
11.4
1 .O
12.5
20.0
11.4
1 .O
11.4
0.07
8.9
0.07
0.2
4.0
4.0
3.3
10.0
3.5
OVEN COLD (JUST
AFTER TURN-ON)
2.0
11.4
1.3
12.7
20.0
11.4
1.3
11.4
0.23
1.8
0.23
0.23
4.1
4.1
4.8
10.0
19.0
RT1
GROUNDED
0.25
11.4
0
11.9
20.0
11.4
0
11.4
0
8.9
0
0.2
3.8
3.8
1.5
10.0
0.5