Sony kv27s10 free download

File name Sony KV-27S10 Field Problem Reports.pdf

Field Problem Reports Model KV27S10 Subject DEAD,REPLACED Q601, Q602, AND R607 HIGH PITCH SQUEAL NOISE FROM HLC, TECH FLASH NO.100 PART NUMBERS MISSING FROM SERVICE MANUAL, NO RESISTOR JUMPER Repair Tips R607 was open Q601, Q602 shorted, replaced parts turned unit on and R607 opened, Q602 shorted. Lifted HLC L509 1/16 of an inch and resoldered, added tape to the board corner Part numbers for R651, R652 missing in service manual. These resistors are jumper wires. No resistors are use. Unit came in with shorted parts in switching power supply. Caused by an excessive load. Deflection yoke was source of problem. It was shorted between the vertical and horizontal windings, which is very unusual. Replacement of yoke along with standard power supply parts resolved problem. Note: Power supply is not protected against all forms of load problems. It is necessary to use proper service techniqures to distinguish between a load or supply caused problem. Some cable channels has distorted picture. Replace the tuner solved problem. 859825400 TV has sound and B+ is ok, but no high voltage.Found cold solder on Emitter and Base legs of Q581 (hot). Re-soldered above legs, then TV works fine. No picture but has sound. Found low voltage on G2 pin 5 crt socket... Found R701 open. Video was red with retrace. Cooled IC301 with freeze spray pictures went blue with retrace. IC-301 signal going in was OK but had low RGB output to the C board. Vertical was down about 2 from top. checked voltage on TP98 and read 1.8v. Checked another set and TP98 should be 11.8v not 15v as schematic states. Traced problem to R539 had changed value from 39k to 41k which was just enough to cause vertical problem. Traced problem to IC101. R539 is across R531 (off of IC501\pin 7) which supplies input to the vertical output. Taps off FBT are not always precise Picture shows bad pincushion. Check pincushion circuit and found incorrect wave form at pin 5 of IC504 (pincushion KV27S10 KV27S10 KV27S10 DEAD, REPLACED YOKE KV27S10 DISTORTED PICTURE WITH SOME STATIONS, TUNER PROBLEM NO PICTURE, COLD SOLDER ON Q581(HOT) NO PICTURE, REPLACED R701 RED VIDEO WITH RETRACE, REPLACED IC301 KV27S10 KV27S10 KV27S10 KV27S10 VERTICAL DOWN ABOUT 2 IN FROM TOP, REPLACED R539 & IC101 KV27S10 DIDTORTED PICTURE, PINCUSHION, REPLACED C540 control IC). Signal had flattened top. Found wave shaping cap, C540 was open. INSUFFICIENT VERTICAL, YOKE KV27S10 Picture pulled up about one inch from bottom. Adjusting controls allowed picture to fill out but centering was off. When centering was adjusted picture folded over. Replacement of yoke resolved problem. Resoldered pin 3 on comb filter block. Pincushion problem. Adjustments did not work except 2 inches on the top of the picture. All main parts in pin circuit were replaced. All incoming pluses were correct. Discovered that voltage on Pincushion control IC504/pin 6 was 4.5 volts instead of 3.6dc. Replaced defective protect module PM501 on the D board. Removed I