Fluke 93 - Page 155

CORRECTIVE MAINTENANCE
7-29
202
mV-in from A2d
203
204
206
207 ATTA-A
208
209 POS-CHA
331
332
501
502
503
504
506
507 +Vref
508 -Vref
509
511
521
522
523
r
I
-1
33
-0J3
-_AAylyL4
y^lAAAA:!
—
,.3
6
0
-3
0 Outpul D2201
10kH2
OiitputN2201,
Voc
=
-1-5V
10 kHz ColleclorV2206
0 Base V2204
10 kHz
Collector V2211
0 TP for
offset DAC
0 POS-CHA
0 VREF D2301
LF: sq. 10 KHz
SGN-in N2301
HF: sq.
500
KHz
Voc
=
2.3V
77 kHz
Collector V2517,
Vpc
=
-7.7V
77 KHz Base V2517
73 KHz
Base V2503,
Vqc
*
-3,83
V
73 kHz Sense Resistors, Pos. side
Vdc
=
-7.7V
73 kHz
Sense Resistors, Neg. side
Voc
=
-7.75V
0
+Vref
0 -Vref
0 Output
N2501
0 TP for FEEDBACK
AMPLIFIER
100 kHz PSG-lnputZ2501,
Vdc
= -1.1 mV
100 khz Oscillator N2503,
Vk
= 0.24V
0 INV N2503
100 kHz Collector
V2526,
Voc=^'0.12V
524