CurtPalme.com Home Theater sales, calibration, service, and discussion forum. Hundreds of free manuals & setup tips.
   


 
Sign up and receive the latest newsletters by email!     Join the Forum discussions!    
    Site Map  
Home Products
For Sale
Referral
List
Photo
Gallery
Links Contact
Us
CRT Primer
Troubleshooting Tips
Mounting Methods
Definitive CRT
Projector Setup Guide
Tube/Raster Setup
Tube Condition (Wear)
Projector
Specifications
Projector Rankings
Video Processors
Ampro 1500/2000
Ampro 2300/2600
Ampro 3600/4600
Barco (Older Analog)
Barco 70x/Cine7  
Barco 500/800/801
Barco 808/Cine8
Barco 120x/Cine9
Dwin 500/700
Electrohome ECP 
Electrohome Marquee 
Mitsubishi
NEC PG
NEC XG
Panasonic 108x
Runco
Seleco
Sony 10xx
Sony 125x/127x
Sony 1292
Sony D50
Sony G70
Sony G90
Zenith 841/851
Zenith 895/900
Zenith 1200

Sony G90 Tube Replacement

 (Page 6)

Back to Advanced Procedures Index

Page:
1 2 3 4 5 6
 

 



37- Reassemble the tube hearting system :


 

38- Now, you need to add adhesive tissue tape on the tube's necks. First buy this special (medical) adhesive tissue tape :


 

39- Place two stripes of this adhesive tissue tape on each tubes neck facing each other :


 

40- Reassemble the tube/aluminium assembly to its relative LC/tank housing. FIRST clean the new tube front face with acetone then alcohol so there is no remaining dust/traces on the optical active area. Once done, place the tube face on the LC tank as fast as possible to avoid any dust input inside the glycol tank. Place back in place the four Philips screws and screw them in cross axis order.


 

41- Using a syringe, Fill back in tank the 250ml stored glycol :

At each 50/60ml step, gently tilt the tube to let the air bubbles exit the C-element chamber via the tank's hole (this allows you to continue to fill the tank with glycol).

42- Now put back in place the colour relevant DY/Sub DY coils and press it against the tube before 'lightly' screwing its circular neck screw. 'Light' screwing is a must to be able to adjust the generated image rotation during mechanical adjustments.

43- Don't forget to carefully put back in place the plastic wedge located between Sub-DY and MG coils!

44- Put back in place the colour relevant MG focus coils and press it against the DY coil wedge before screwing its circular neck screw.

45- Ending, put back in place the colour relevant 2P/4P coils and press it against the MG focus coil before screwing its circular neck screw.

WARNING: Do not over tighten the neck screws against the tube neck or glass may brake! refer to the Sony service manual (tightening torque force is 80-120N.cm or 8.16 to 12.24kgF.cm).

46- All these coils placements must be done in the same way they were located on their original 'toasted' tube. You can take pictures of the original assembly to remind their positions / orientation :

47- Then you can carefully slide in the complete assembly within the G90 unit, with one hand on the LC housing and the other on the tube neck end to prevent damage. Check that every wire/connector is NOT stressed during this operation (doing this operation with a friend can be useful). Ensure that the HV lead comes in the right holder bracket. Then reconnect the C board to the tube neck. Ensure that the pins are fully inserted within the C block tube's socket.

48- Reconnect all the relevant cols wires/connectors. Do not forget to re-attach the DY hearting black wire and the HV lead end to the HV block (press down the wire then rotate 90° and release : check if the wire is secured by pulling it. If Ok, replace the grey silicon cap above the tube).

49- Screw back in place the tube LC housing to the relative brackets then put back the lens and screw it on.

50- Fire-up the unit and start the necessary mechanical adjustments described in the G90 service manual (after tube replacement). Don't forget to redo the D65 colorimetry even for one single tube replacement! (See our Grayscale & Color Calibration for Dummies guide).

!!! Important : do not mix-up the lens neither the coils between tubes !!!! Always put a R/G or B coloured round stickers on the colour relative parts to ensure that mixing could NOT occur !!

That's all.

Enjoy the new tube(s) on the G90 !

John

P.S. Please note that Terry helped me with some explanations on the critical part of this job (carefull cutting of the silicon join between the old tube face and the tube holder mechanic). So thanks to him : he's the best/smart techy guy on Sony CRT projectors and you can always count on him!

Did you find this information useful? Please consider making a donation to help defray the cost of managing and hosting future articles, tips, and documents.     
Or purchase from Amazon.com and a small percentage automatically goes to support this site at no extra cost to you! Visit their Blu-ray and 4K UHD stores for sales. Want to show off your home theater? See our Blu-ray Release List & Must-Have Titles. Shop at Amazon.com and support our site!


... Previous Page

Back to Page 1


 

© Copyright CurtPalme.com. All Rights Reserved.