1 689 975 140 2013-07-01| Robert Bosch GmbH
Adjustment and Functional Test | EPS 807 / 815 | 25
en
7.4 Testing speed monitoring A5 (DZE)
7.4.1 Printed circuit board 1 688 400 009 (up to
FD 12-2000)
If main switch Q1 is on the following LED’s must lit on
A5 (DZE) (in the left down corner):
$ V63 - 24V-Supply (control signal on converter)
$ V62 - 12V- Supply (tip switch evaluation and
speed measurement)
$ V60 - 5V- Supply (computer, logic, interface etc.)
If not, test the supply of the LP (transformer T2, safety
fuses F10, F5).
Further LED V78 should blink (watchdog). This identifies
a proper performance of the program. Should it be off
the operating program must be reinstalled (download).
LED V59 identifies the stop command of the speed
measurement on the driver. Blinking indicates error
(interface to the control unit / indicating instrument or
converter is interrupted, maximal speed is exceeded,
false running direction etc.) – comply with error mes-
sage of the BAG.
The following LED’s are analogue to the lamps of the
EPS control unit/:
$ V70 – Acknowledgement Converter ON
(corresponds to H1)
$ V72 – Acknowledgement Regulator release
(corresponds to H2)
$ V74 – Program Heating (corresponds to H3)
$ V23 – Lubricating oil pump (corresponds to H4)
Herewith damaged lamps or cables can be possibly
detected.
Fig. 42: Printed circuit board 1 688 400 009
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