This is the next step to dust blob cleaning for the Sanyo Z2 if the ‘compressed air’ technique was unsuccessful which I often found to be. This document shows pictures of how gained access to the optical path of the Z2 and used a bulb type blower brush and lens cleaning solution on most of the elements in the optical path to completely remove any dust particles. ******Disclaimer****** Enter at your own risk. I am not liable for damage to you or your projector. This will most likely void your warranty. Make sure you are grounded and most importantly the projector is unplugged from AC power. The internal power supply has very high (lethal) voltages when powered so it’s critical it is not powered when working with the projector for your safety. Secondly, the grounding strap ensures the safety of the sensitive electronics from you (static electricity, aka ESD). If you are not comfortable with any of this, STOP now and go no further! ********************** I’ll start with the case off, as directions for that are common to find. This thorough cleaning involves handling of the main printed circuit board, so proper ESD handling is recommended. I purchased a cheap grounding strap (see figure 1) to ensure I was grounded at all times. Even better would be a proper workstation with ESD safe floor mats and bench mats, but how many of us have those at home! I purchased the cleaning kit and grounding strap at bhphoto.com. Here are the part numbers at BH (table 1) Table 1: BHphoto.com part numbers for cleaning kit

Belkin Anti-Static Wristband B&H# BEWBAS

Lens Cleaning Cloth B&H# CLLC88

Rubber Blower Brush B&H# GBBBM

Zeiss Liquid Cleaner - 3 oz. B&H# ZELC

Figure 1: Grounding Strap connected to earth ground (screw backed out slightly from socket)

The first step is to remove the main PCB. I’ve numbered the 7 screws needed to remove the PCB in red. There are 16 connectors total to remove from the main PCB. 13 wire connectors and 3 ribbon connectors for the 3 LCD panels. 1 of the wire connectors is on the underside of the PCB that is removed last. The wire connector for the top half of the plastic case is the first you’ll want to remove for convenience. Note for all the wire connectors there is a white dot and usually a 1 on the reference designator of the PCB indicating pin 1 location. Pin 1 of the wires is always either the white (for white and grey wired connector) or red for the others (such as the red/yellow/black wired connector). See figures 5 & 6 for reference.

Figure 2: PCB photo 1

Figure 3: PCB photo 2

Figure 4: PCB photo 3

Figure 5: Connector reference designator and pin close-up (red #1 wire)

Figure 6: Connector and reference designator (white #1 wire) Figure 7 shows the steps necessary to remove the ribbon connectors going to the 3 LCD panels. A small flathead screwdriver is needed to lightly nudge the black plastic bits out (towards the ribbon). Once these two are out the ribbon can be gently pulled out of the connector.

Figure 7: Ribbon cable removal Once the main PCB is removed there are two more things to remove before getting full access to the optical path. The first is the plastic holder for the power supply PCB. There are 5 screws to remove this and are numbered in figures 8 and 9.

Figure 8: Power supply PCB removal

Figure 9: Underside PCB connector and five screws for power supply PCB removal After the power supply PCB is removed then the shroud for the optical path can be removed. There are ten screws securing this down. See figure 10 for more detail.

Figure 10: Optical path shroud Under screws 1 and 2 there is also a small metal insert between the lens and shroud. Remove this as well as the shroud.

Figure 11: Shroud removal

Figure 12: Shroud elements There are 5 optical elements on the shroud that can be cleaned. I clean the elements by using the bulb blower brush first to remove large dust particles that might cause scratching. Then I spray the cleaning cloth to moisten it, and use the cloth to clean the element of micro dust particles that have accumulated. The following pictures show the remaining elements in the path you can clean hands on as well.

Figure 13: Optical path

Figure 14: Optical elements, numbered ones can be removed As seen below you can see why compressed air around the ribbons alone will just not do the job of cleaning dust blobs. Figure 15 shows a lens element with a huge dust blob!

Figure 15: Dust blob! To reassemble follow these instructions in reverse and enjoy your clean and restored Z2!