Measuring Points On Power Module - Bosch BAT 690 Repair Instructions

en 34 | BAT 690 | Faults & Troubleshooting
5.6

Measuring points on power module

DANGER - Risk of electric shock from live parts!
¶
Work on electrical systems or equipment must only be performed by qualified electricians or
trained personnel under the guidance and supervision of an electrician.
¶
Observe the electrical engineering safety regulations.
Voltage measurement
Measure mains voltage after power inlet socket connector
Measure mains voltage after device fuse
Measure auxiliary circuit voltage (UZK)
1. Measure primary auxiliary voltage
2. Measure primary auxiliary voltage
Measure auxiliary voltage
Measure controller voltage
Measure reference voltage
Voltage on power module with a 12 V battery
Voltage on power module with a 24 V battery
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1 689 975 288 2017-06-30
From To
X4 X2
M1 M2
C58+ C58-
VDD GND
VDD2 GND
IC 14 Pin 1 GND1 Pin 4
3V3 GND1 Pin 2
3V3ref GNDA
U = 12 V GNDA
actual
U = 24 V GNDA
actual
Value, approx.
230 V
230 V
360 V
13 V
12 V
12 V
3.3 V
3.3 V
0.85 V
1.7 V
Robert Bosch GmbH