Agilent Technologies 6012B Service Manual page 28

PIN NO. SIGNAL NAME
Digital-Circuits Bias & Reference Voltages
24 +5V
22 + 20V(5V UNREG)
14 2.5V ref
6 0.5V ref
Analog-Circuits Bias Voltages
2 + 15V
21 - 15V
Status Signals
17
CV
16
CC
13
OV
11
DROPOUT
12
OT
Control Signals
25 PWM OFF
26 PWM ON
18 Ip MONITOR
15
DOWN PROGRAM
7 OVP PROGRAM
19
PCLR
Commons & Current-Monitor
4 L COMMON
9 M COMMON
10 I-TEST
3 NOT USED
20 Ip-SET
28
Table 3-1. Control Board Test Connector, A2J7
Vdc
5.0
20.0
2.50
0.50
15.0
-15.0
TTL Lo
TTL Lo
TTL Hi
TTL Hi
TTL Hi
TTL Hi (6010A, 6015A)
1.2-3.0 (6011A, 6012B)
1/100 OVP (6010A)
1/10 OVP (6011A)
1/30 OVP (6012B)
1/100 OVP (6015A)
TTL Hi
0.0
≈ 0.0017 ( Iout)
≈ 0.9
WAVEFORM/CONDITIONS
with 120Hz & 40KHz ripple
if in CV operation
if in CC operation
if not OVP shutdown
if ac mains okay
if not overtemp shutdown
10 µ s TTL pulses, 20KHz
1.7 µ s TTL pulses, 20KHz
½ sawtooth, 20KHz
while not down programming
e.g.: 2Vdc if OVP set to 200
voltage output (6010A)
if +5V bias OK
common return for all bias
voltages, and status and control
signals
common return for 2.5V ref.
and 0.5V ref.
inboard-side monitoring res.
SOURCE
A2Q9 (emitter)
A1CR2, A1CR5
A2U7 (OUT)
A2R84,A2R85, A2R24
A2U11 (OUT)
A2U12 (OUT )
A2Q2 (collector)
A2Q1 (collector)
A2U15-13
A2U15-10
A4TS1,A5TS1
A2U16-5
A2U15-1
A2CR27 (cathode)
A2CR17, CR31(anode)
A3R97 (wiper)
A2UQ11-4
A1R11
AlR13 (6011A))
A2R25 wiper