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Modelo - Chassis KV27XBR10
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV27XBR10 | REMOTE GIVES IREGULAR FUNCTIONS, REPLACED IC-1701 | When using the remote control, unit would operate erratically.For example, hitting the power off, the set changes channel. | ||
| Sony | KV27XBR10 | PICTURE BLANKS ON IN-ACTIVE STATIONS, REPLACED D-303 | Picture would blank if you tuned to an in-active station. | ||
| Sony | KV27XBR10 | NO PICTURE SLEEP LIGHT ON, REPLACED C-500 | Set has high voltage. Sleep light is on, but set has nopicture. Found .7Vpp on pin 31 of IC-301 (should be 2 volts). Replacedshorted C-500. -HQ COMMENTS: When C-500 (on IC-500/pin 1) shorts, vertical drive signalwill be lost. With no output signal o | ||
| Sony | KV27XBR10 | ONLY 27 OUT OF 32 CHANNEL CAPTION MEMORY AVAILABLE, IC-1301 | Operating instructions (pg. 40, attached) say up to 32channels may be labeled. I can only get a maximum of 27. When one isdeleted, making 26, another cannot be added in its place. The amount ofcharacters (1-4) stored per station seems to have no effec | ||
| Sony | KV27XBR10 | NO VERTICAL SWEEP, REPLACED IC-1303 | No vertical sweep or any functions except a narrow horizontalline on the screen. The vertical osc. waveform, IC-301/pin 34 was good.There was no vertical drive, IC-301/pin 31. The DC voltage on pin 47 and48, the data and clock line measured only 1-2 vd | ||
| Sony | KV27XBR10 | VIDEO BLANKS, OPEN FOIL PATTERN BETWEEN Q-707 & Q-708 | Video blanks: observed voltage at base of Q-707 but it was notcontinuous at collector of Q-708 on C board. Y signal observed at pin 3of IC-301 but no RGB output. | ||
| Sony | KV27XBR10 | DEAD SET, REPLACED RY-601 ("F" BOARD) | Dead set. Power relay coil open. Should measure about 255Ohms. | ||
| Sony | KV27XBR10 | RGB LINES IN PICTURE, SEE SERVICE BULLETIN NUMBER 76 | Three to four retrace lines are visible at the top of thescreen. They do not look like ordinary retrace lines but are of solidred, blue, or green colors. | ||
| Sony | KV27XBR10 | HORIZONTAL LINES IN PICTURE, COLD SOLDERED C-546 ("A" BOARD) | Horizontal lines in picture sometimes on top sometimeson the bottom. Looks like retrace but in reality it is ringing. | ||
| Sony | KV27XBR10 | INTERFERENCE PATTERN ACROSS SCREEN, REPLACED COMB FILTER | Interference pattern across the screen which looked likesignal overload. Scope shot looked ok at input, pin 2 CM-1301, but noisepresent at output pin number 6, Y out. Suspected this part was bad. | ||
| Sony | KV27XBR10 | PICTURE COMES ON SLOW AND FLASHES FOR FIVE MINUTES, | On first turn on, the picture or screen will come on veryslowly. When picture comes on, it will flash on and off until the set ison for five minutes. Unit will work well. This set has always done this. | ||
| Sony | KV27XBR10 | NO PICTURE, HOW TO TROUBLESHOOT THE IK CIRCUIT | As you may have noticed, when servicing this and other unitsusing this particular IC-301, RGB lines at the IC level are blanked any-time the C board is disconnected. The main reason for this blanking isa cathode current detect line (IK). When the unit | ||
| Sony | KV27XBR10 | INTERMITTENT COLOR, REPLACED COMB FILTER, ALSO SEE SB # 53 | Monitored IC-301/pins 4 and 5 on the A board. Chroma levelwould drop, traced back to Comb Filter. | ||
| Sony | KV27XBR10 | INTERMITTENT VERTICAL COLLAPSE, REPLACED THE ARCING CRT | This unit had a vertical collapse problem due to static sig-nals getting into the jungle IC-301. One way to isolate the problem isto monitor vertical drive of pin 31 of IC-301 with a scope. Made a note ofthe interuption of the vertical signal of pin 31. | ||
| Sony | KV27XBR10 | SET KEEPS TURNING ON AND OFF, REPLACED Q-651 | Set would come up and then go into shutdown at one secondintervals. Power supply voltages followed this pattern. Found highleakage C-B of Q-651. |