00197042-04_SM_X-Serie-S_Customer_EN - 第90页

3 Power supply 3.5 Power supply and transformer module (from serial number Hxxxx) 90 Service Manual SIPLACE X-Serie S 06/2019 Fig.102: LED status Monitoring the voltage absence after switch-off The voltage at the measur…

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3 Power supply
3.5 Power supply and transformer module (from serial number Hxxxx)
Service Manual SIPLACE X-Serie S 06/2019 89
Measurement with known reference voltage
To conclude the self-test, check the voltage tester with a known reference voltage.
Fig.100: Test with reference voltage
You can use the service socket (if present)
on the power supply (disabled with "110V
option") or any other electrical socket.
Measure the voltage present between the
pins and at PE (ground).
Measuring the voltage absence directly after switching machine off
Fig.101: Check voltages
When the machine has been switched off,
the full voltage is still present at the meas-
urement points X303 and X304.
Measurement is always performed at the ref-
erence point (GND)!
●
X303 – X305 GND: 300+/‑10V OUT
●
X304 –X305 GND: 300+/‑10V
Test 300V IN_X303-X305:
Currently present voltage
Test 300V OUT_X304-X305:
LED display Output 1 at AC/DC converter
Green: Voltage over 220V
The power pack shows an LED display for output 1 > 220 V in green, which means that the voltage
is still over 220 V!
The following figure explains the LED status of power packs PS1 and PS2 (300VDC):
3 Power supply
3.5 Power supply and transformer module (from serial number Hxxxx)
90 Service Manual SIPLACE X-Serie S 06/2019
Fig.102: LED status
Monitoring the voltage absence after switch-off
The voltage at the measurement points only discharges slowly.
After switch-off, the voltage drops from 300VDC to under 5VDC in approx. five minutes.
It is only then possible to pull the SMPS out of the machine without hazard and work on it.
Fig.103: Checking voltages (X-Series S from Hxxxx)
Fig.104: Measurement values
As soon as the voltage has undershot a value of 220VDC, the LED display on the power pack
changes!
DANGER
Measurement values below 5VDC
Measure between the following points:
► X303 (IN) – X305 (GND) < 5VDC
► X304 (OUT) – X305 (GND) < 5VDC
3 Power supply
3.5 Power supply and transformer module (from serial number Hxxxx)
Service Manual SIPLACE X-Serie S 06/2019 91
Fig.105: LED on the capacitor battery(CAP)
► Check the LED on the capacitor battery
(CAP).
 DANGER!
Once the LED on the capacitor battery
(CAP) does not light any longer, it is
possible to work on the power supply
without hazard!
.
3.5.5 Replacing the buffer module
Parts, equipment and tools
●
Buffer module PCS417.771 [03106016-xx]
Overview
Fig.106: Buffer module
1. Buffer module
Removal
► Switch off the machine, disconnect it from the power supply and secure it to prevent
unauthorized reactivation. Observe the instructions in section 1.2 "Preparatory work..." [}16].
DANGER
High voltages
High DC voltages can be present in the buffer module.
► Observe the waiting period after power supply switch-off (5 minutes).
► Observe the LED display on the buffer module. This will show any residual voltages
still present.