Leds On Pcbs - Bosch EPS 708 Repair Instructions

5.3

LEDs on PCBs

The PCBs contain LEDs, which light up in a particular
sequence during normal operation (test bench on, no
testing).
Symbol Key
LED lights up
LED lights up at half
strength
LED off
LED flashes
5.3.1 PCB (A3)
458863-22_Ri
V81
Fig. 20: PCB 1688 400 452
V3 24 V power supply
V5 24 V power supply
V25 14 V-28 V constant supply to CRI box
V26 13.5 V power supply
V81 15 V power supply
V129 24 V lubricating oil supply (optional)
V146 K2 switching state
V149 K1 switching state
V3 V5 V25 V26 V81
*optional
Robert Bosch GmbH
V25
V5 V26 V3
V146
V149
V129
V129* V146 V149 Status
Power supply in good working order.
No faults occurred
Emergency stop active or
disturbance to 15 V power supply
Disturbance to 24 V power supply
Checklist for normal operation | EPS 708 | 15
5.3.2 PCB (A6)
Fig. 21: PCB 1 688 400 480
V21 15 V power supply
V22 5 V power supply
V23 Processor clock
V21 V22 V23 Status
Power supply and processor in good
working order. No faults occurred
Emergency stop active or disturbance to
15 V power supply or disturbance to
24 V power supply
en
V23
V21 V22
458863-24_Ri
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1 689 975 233 2018-05-08