Measuring Points On The Power Module - Bosch BAT 645 Repair Instructions

en 26 | BAT 645 | Faults & Troubleshooting
5.6

Measuring points on the 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 the voltage after the power inlet socket connector
Measure the voltage after the device fuse
Measure the link voltage (UZK)
Measure the 1st primary auxiliary voltage
Measure the 2nd primary auxiliary voltage
Measure the auxiliary voltage
Measure the controller voltage
Measure the reference voltage
Voltage on the power module with a 12-V battery
Voltage on the power module with a 24-V battery
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1 689 975 285 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
ist
U = 24 V GNDA
ist
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