Transcript
Technical Bulletin
111035 Rev.*
SIGMA DATA 7200 FEED ROLLER REPLACEMENT INSTRUCTIONS Tools Required: No.2 Phillips screwdriver Wrist strap (or similar device) for ESD grounding
To Prepare the Printer for Maintenance: 1. Verify that all replacement parts and tools are present. 2. Turn off the power switch, unplug the AC power cord, and disconnect all communication and interface cables. 3. (1) Unlock and open the Lower Right Side Cover then (2) open the Upper Right Side Cover completely, until it rest on the Service Cover (Fig.1). 4. Remove the Service Cover by removing the two M3 Phillips screws holding the Service Cover to the upper frame of the printer (Fig. 2). Fig. 1
Fig. 2
5. Loosen or remove two M3 Phillips screws, located on the topside of the Back Panel, and remove the Back Panel from the printer.
Fig. 3
To Replace the Feed Roller: IMPORTANT: Properly ground yourself using an ESD wrist strap (or similar device) to prevent static discharge damage to the electronics.
6. Remove four M3 Phillips tapping screws [4.1] from the Flash Card Assembly. Remove the three M3 Phillips tapping screws [4.2] located in the corners of the Flash Card Shield then disconnect the Flash Card Assembly from the Main PCB Assembly.
Flash Card Shield
4.2
4.2 4.1
4.1
Flash Card Assembly 4.1
4.1 4.2
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7. Disconnect the four-pin Power Supply Connector from the Main PCB Assembly. Remove five M3 Phillips screws [5.1] and one M3 Phillips tapping screw [5.2] from the Power Supply Shield [5.3]. Remove the Flash Card Shield [5.4]. 8. Remove the Power Supply Shield from the Flash Card Shield [5.4] and disconnect the four-pin CN2 Connector [6.5] from the Power Supply Unit [6.6]. 9. Remove two M3 Phillips screws [6.7] (located on the upper and lower left corners) and two M3 Phillips tapping screws (the longer screw [6.8] in the center and the shorter screw [6.9] in the upper right corner) from the Power Supply Unit. Then carefully move the Power Supply Unit away from the Flash Card Shield and disconnect the five-pin CN1 Connector [6.10] from the Power Supply Unit.
5.4 5.1
5.2
4 pin Power Supply Connector 5.3 5.1
Fig. 5
6.6 6.7
6.9
6.10 6.7
6.8
7.11
6.5
7.12
Fig. 6
10. Remove the M3 Phillips screw [7.11] and the Power Supply EMI Shield [7.12] from the printer.
8.14 Fig. 7
routing and orientation of the Fan Connector Cable prior to disconnecting -2from the Host RS232 Input PCB Assembly.
9.18 9.16
11. Remove the M3 Phillips screw [8.13] from the Chassis Ground Cable Assembly [8.14] located on the top part of the Fan Bracket Assembly [8.15]. Then remove two M3 Phillips screws [9.16] from the backside and the M3 Phillips tapping screw [9.17], located through a special clearance hole [9.18] on the Fan Bracket Assembly. 12. Lift out the Fan Bracket Assembly and carefully disconnect the Fan Connector Cable from the Host RS232 Input PCB Assembly [10.19]. IMPORTANT: Note the
8.13
9.17 10.19
8.15
Fig. 9
Fig. 8 111035
11.20
11.21 11.22 Fig. 10
12.23 12.24 12.25
13. Loosen, but do not remove, the M4 Phillips screw on the Idle Bracket 2 Assembly [11.20] and remove the Timing Belt [11.21] from the two Feed Roller Gears [11.22].
Fig.12.28 11
12.26 12.27
14. On the back of the unit, remove two M3 Phillips tapping screws [12.23], with two M3 Plain Flat Washers. Remove the Scraper (clear Mylar) [12.24] and the Cleaning Plate #1 [12.25] from the printer. 15. Remove two M3 Phillips tapping screws [12.26] and the Lever Guide [12.27] from the printer then carefully lower the Cutter Sensor PCB Assembly [12.28], with the cable attached, down on the working surface.
13.30
13.29 Fig. 12
16. Pull out the Snap Latch [13.29], located on the lower right corner of the user side of the printer and remove the Paper Dust Tray [13.30].
Fig. 13
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17. Remove the two E-Clips [14.31] and Bearings [14.32] located on the user side of the printer, from the Feed Roller Shafts. Remove the Feed Rollers [15.33] from the Service side of the printer through the specially designed slots in the printer’s frame. IMPORTANT: Notice the location and position of the Cleaning Plate #2 when removing the bottom Feed Roller. The Cleaning Plate is very fragile and can be damaged if the bottom Feed Roller is not properly removed or installed.
Fig. 14
Fig. 15
14.31 14.32
14.32
15.33
14.31 Cleaning Plate #2
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18. Install the new Top Feed Roller with the Timing Belt placed over the Feed Roller Gear. On the user side, assemble the Bearing on the Feed Roller Shaft. Next, install the new Bottom Feed Roller the same way as the Top Feed Roller but with extra care not to bend or misalign the Bottom Roller Cleaner. Secure both shafts with the “E” Clips from step 17. IMPORTANT: Slight pressure on the new Feed Rollers will have to be applied to install them properly. Once installed, make sure the new Feed Rollers turn freely.
19. Reassemble all parts previously removed in reverse order. Note: Feed Roller Belt tension should be set between 400 to 500g (14 to 18 oz). 20. Close the Upper Right Side Cover then close and lock the Lower Right Side Cover. 21. Reconnect all communication and interface cables, plug-in the AC power cord and turn on the power switch. 22. Verify proper functionality by printing a test coupon (refer to the Operations and/or Maintenance Manuals if you need additional information).
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