Sony KLV-26V300A, KLV-32V300A, KLV-40V300A, KLV-46V300A
Service Manual and Circuit Diagram
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Sony KLV-26V300A, KLV-32V300A, KLV-40V300A, KLV-46V300A <br>Service Manual and Circuit Diagram  <br> <font color=red>New!</font>
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This Sony KLV-26V300A KLV-32V300A KLV-40V300A KLV-46V300A Service Manual and Circuit Diagram
. This service information is designed for experienced repair technicians only and not designed for use by the general public.


TABLE OF CONTENTS

1. DISASSEMBLY

1-1. Rear Cover Removal .................................................... 7
1-2. Vesa Bracket Assembly Removal ................................ 9
1-3. H1 Board Removal .................................................... 11
1-4. U1 Board Removal .................................................... 11
1-5. G1H Board Removal ................................................. 12
1-6. G3 and D1 Boards Removal ...................................... 13
1-7. DTT Shield, UT and BG1 Boards Removal ............. 14
1-8. D2 Board Removal .................................................... 15
1-9. Inlet, AC (with noise filter) Removal ........................ 15
1-10. Speaker, H3 and H4 Boards Removal ....................... 17
1-11. LCD Panel Removal .................................................. 18

2. WIRE DRESSING

2-1. (KLV-26V300A) ...................................................... 20
2-2. (KLV-32V300A) ...................................................... 22
2-3. (KLV-40V300A) ...................................................... 25
2-4. (KLV-46V300A) ...................................................... 29

3. SERVICE ADJUSTMENTS

3-1. How to enter Service Mode ....................................... 34
3-2. Signal Level Adjustment ........................................... 34
3-3. Gamma Adjustment ................................................... 36
3-4. White Balance Adjustment ........................................ 37
3-5. Panel Replacement ..................................................... 38
3-6. Board Replacement .................................................... 38

4. DIAGRAMS

4-1. Block Diagram ........................................................... 39
4-1-1. BG1 (1/3) Block Diagram .............................. 39
4-1-2. BG1 (2/3), H1, H3, H4 and UT Diagrams ..... 40
4-1-3. BG1 (3/3) and U1 Diagrams ........................... 42
4-2. Circuit Boards Location ............................................ 44
4-3. Schematic Diagram Information ............................... 44
4-3-1. BG1 Board — (001) ....................................... 45
4-3-2. BG1 Board — (002) ....................................... 46
4-3-3. BG1 Board — (003) ....................................... 48
4-3-4. BG1 Board — (004) ....................................... 50
4-3-5. BG1 Board — (005) ....................................... 52
4-3-6. BG1 Board — (006) ....................................... 54
4-3-7. BG1 Board — (007) ....................................... 56
4-3-8. BG1 Board — (008) ....................................... 58
4-3-9. BG1 Board — (009) ....................................... 60
4-3-10. G1H, G3, D1 & D2 Boards Schematic Diagram .................................................... 62
4-3-11. H1 Board Schematic Diagram ...................... 63
4-3-12. H3 Board Schematic Diagram ...................... 64
4-3-13. H4 Board Schematic Diagram ...................... 66
4-3-14. U1 Board Schematic Diagram ...................... 67
4-3-15. UT Board Schematic Diagram ..................... 69
4-4. Voltage Measurement and Waveforms ...................... 71
4-5. Printed Wiring Boards ............................................... 73
4-6. Semiconductors .......................................................... 81

5. EXPLODED VIEWS

5-1. Rear Cabinet and Stand Assy .................................... 83
5-2. Frame and Cover ........................................................ 85
5-3. Chassis-1 .................................................................... 87
5-4. Chassis-2 .................................................................... 88
5-5. H3, H4 Boards and Speaker ...................................... 90
5-6. Bezel Assy and LCD Panel ........................................ 91
5-7. Accessories and Packing Materials ........................... 92

6. ELECTRICAL PARTS LIST .............................................. 95

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We are in business since 2002 and do our best to give our customers perfect service!

  Paul Jumbo 2019-04-19 18:47:57  
  I had Epson WF-2650 and it wasn't printing fully, skipping lines, even though colors were full.
I did a lot of cleaning, head cleaning, put new cartridge but no luck. I did some head cleaning using glass cleaner and syringes as shown on various youtube video.
After that, my printer didn't recognize two of the cartridges. I tried everything, cleaning contacts etc, nothing worked.

I was finally going to buy new cartridges however stores were closed today so I decided to look for chip-resetting tool but nothing good was available locally.

I came across this WIC reset utility and was really skeptical if it will work. I took the chance, bought the key, used the tool to reset firmware to chipless firmware, it was successful at the first go.
At this point, printer showed all ink levels 100%. I printed a test page and it came out perfect.
To make it even more interesting for me, I live in Europe and during one of the trip, I bought two sets of XL cartridges for this same model but printer didn't recognize in the past and I was going to throw them since these were no good for my EU model. I tried these again after chip reset firmware and voila, they works too.

I am amazed at the propaganda of these printer manufactures that even original printer cartridges from US didn't work on the model here in EUROPE, these used to fit perfectly but printer wouldn't recognize however, now they works too.
Today, I was almost ready to trash my 2.5 yr old and not much used printer but after a lot of trying and finally using WIC reset utility, the printers works like new and saved me a lot!

These were the best 20 CHF/USD I spent today!
Thank you very much and I don't need to worry about relying on a hardware chip-reset tool. I will now be able to use US model cartridges and re-fill i like without having to worry. I even printed some photos using this same printer on photo paper today and printer did an excellent job.
  john Liang 2018-08-16 18:24:01  
  I took a gamble last week by buying a Epson Pro 4900 for less than $140 thinking if I could not get it going, I can at least take the remaining ink out of the cartridge and use it on my other printers.

The initial nozzle test was not so bad for a printer that was unused for about 1 year, I got six Nozzles firing at around 90% not bad, the next thing I did was the popular Windex treatment, I ran 4 sessions of Windex treatment on the printhead, first one lasted 1 hour, second one lasted 2 hours and third one lasted 4 hours and the last one lasted 8 hours, I got a fully soaked paper towel in my last two treatments, I ran a series of power clean on the non firing nozzles but the Green nozzle remain clogged.
At this stage I thought this program may be my last chance to rescue this printer. I bought the program at 6 pm today, I ran the CL1 clean on OR/GR channel and the green nozzle remain clogged, I then ran the CL2 clean on the same nozzles and the same result, at this point I thought maybe this printer is completely dead but I will give CL3 a shot, I went for dinner when CL3 clean was performed on the printer. I came back immediately printed the nozzle check I got the perfect Nozzle pattern on almost every single colour nozzle except Cyan which has a few bar missing, a quick CL1 clean on Cyan/Magenta fix that.
The next thing I did was to run a quick paper profile on this printer with X-rite software, I printed two test pattern page to calibrate the printer, then come the first real print on my Epson Stylus Pro 4900 it was absolutely brilliant, the best printer I have ever own and the IQ on one of the cheapest glossy media I could find was simply breath taking.

I have to say without this software my $140 purchase would probably end up in the rubbish dump.
I must say I was skeptical about the truthfulness of the success that other has with this software but with myself actually tried this software, I have no reservation but to recommend that anyone who has a clogged Epson Pro 4900 to give this program a shot it may just save your printer.

On the scale of 10 I would probably give it a 11 and it is more than just good!
  tanveer haider 2004-10-22 11:15:44  
  i need services manual all canon product. I need strat new workshop, there i always services & repair canon copier
  Evgen Test 2010-08-31 09:40:59  
  My printer stopped printing with the error as \"General Error\" Epson quoted me $60 to send an engineer to fix my printer. After reading through the information on this site I decided to fix it myself. Found the problem was related to the waste ink pad counter. Only 10 minutes, I had the the printer working. The printer tested fine and has done approx 150 pages since with NO issues. Thanks for the WIC program!
  saad ali 2010-05-29 19:57:11  
  install incoder strip and printhead carrage and timing belt
  John Briggs 2012-01-26 19:19:33  
  Worked straight out of the box and in a few minutes I was up and running again.
  norman bautista 2019-12-01 04:04:59  
  thanks team,, get back soon thank you for your code i reset my printer in no time..
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Service Manual and Circuit Diagram
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