User's Manual

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