SIGNA MR355 / SIGNA MR360
Service Manual
5856356-3EN Revision 5.0
Basic Service Documentation. Copyright General Electric Company.
Object ID: 00000018WIA30671030GYZ
Topic ID: id_13106094 Version: 1.3
Date: Jul 5, 2019 11:18:59 PM

PHPS Lite Functional Check

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	0 minutes	15 minutes	0 minutes

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Digital Volt Meter	1	-	-	-

PHPS Diagnostics

Procedure

Run the PHPS Functional Diagnostic.
1. Open Common Service Desktop.
2. Select 'Diagnostics/System Function /Patient Handling/PHPS Functional Diagnostic'.
3. Select 'IO Status' and Select 'Run'.
Figure 1. PHPS Functional Diagnostic

Check that the results satisfy the specification. See Table 3 for Specification.

Table 3. Specification
IO Data	Results
Table DC OK	NORMAL
Motor Amp	NORMAL
Power Supply Data	Results
8V	7.6 < Value < 8.4
3.3V	3.14 < Value < 3.47
5V	4.75 < Value < 5.25

LED Power Box and Dock Voltage Check

Procedure

Remove left rear pedestal cover. (Refer to Pedestal Cover Remova Rear l)
Unscrewing eight bolts that fix the cover of LED Power Box (see Figure 2).

Figure 2. Bolts on the cover of LED Power Box
Open the cover of the LED Power Box, there are nine test points in the inner circuit board.(See Illustration 3), Check the voltage at test points with Digital Voltage Meter. See Table 2 for Specification.

Figure 3. LED Power Box Voltage Check

The Dock power is located in the system cabinet. Refer to Illustration 4 to check the ＋42V DC for Dock. See Table 2 for Specification.

Figure 4. Dock Voltage Check

Table 4. Specification
Descriptions	Nominal Voltage	Upper(V)	Lower(V)
SRI	+8vDC	8.45	7.65
SRI	+24vDC	25.2	22.8
SRI	+12vDC	12.5	11.5
PAC	+10vDC	10.25	9.85
PAC	+15vDC	15.75	14.25
PAC	-8vDC	-8.0	-8.5
PAC	-15vDC	-14.25	-15.75
BoreLight	+5vDC	4.75	5.25
Patient Alignment Light	+5vDC	4.75	5.25
Dock Cradle	+42vDC	44	40

Finalization

Perform TPS Reset.