Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
---|---|---|---|---|---|
Sony | KV2670R | RETRACE LINES AT TOP OF PICTURE, REPLACED C520 & C542 | TV shows white lines on the top of screen. | ||
Sony | KV2670R | BEAT PATTERN IN PICTURE/PIC. DARK/LOOSE TUNER/SOUND BREAKS | All problems above occurred because loose connections on +9Vregulator Q-204. The high resistance connections caused the 9V DC levelto vary between 9 and 4vdc. Thus causing the tuner chroma/luma jungle ICand audio circuits to do many strange things. | ||
Sony | KV2670R | NO PICTURE - NO SOUND, D-102 5V REG SHORTED | No picture and no sound. Sleep light only. CPU had no dataoutput. The pulse from the vertical was there but its amplitude wasreduced by about 50 percent. | ||
Sony | KV2670R | INTERMITTENTLY TUNING DRIFTED OFF, LEAKY C-202 | Intermittently tuning would drift off. Found that when we usea tuner sub that the AFT pins out of VIF chip would change. Pin 6 of IC20would go approx. 5VDC. This was what was driving the tuner off station.Pin 5 was 0V but pin 7 which should be 3.6VDC | ||
Sony | KV2670R | PICTURE SHRINK VIRTICALLY, IC-301 REPLACED | This TV had a raster shrink virtically (2 inches from topand 2 inches from bottom). Vertical size control RV502 had very littleaffect. | ||
Sony | KV2670R | INTERMITTENT VERTICAL JITTER ON TAPE, R-854 VALUE CHANGE | This unit had an intermittent vertical jitter on copy guardtapes. The tape I viewed was MCM home video - MASK. The vertical jitterwas worse in the beginning. The tape was played through two SL-HF900and an SL-HF600 with the same results. | ||
Sony | KV2670R | SYSTEM CONTROL LOCK-UP, REPLACE X-101 CERAMIC OSC | TV has HV with ear next to speaker. There is noise fromspeaker. But there is no brightness and using the power switch on frontof TV or remote hand unit the TV cannot be turned off, clock at Pin 1IC103 less than half the amplitude given on the circuit d | ||
Sony | KV2670R | SYSTEM CONTROL LOCK-UP, PERFORM PROCEDURE FOR NO VIP | TV has HV and with ear next to the speaker there is noisefrom the speaker. But there is no brightness and using the power switchon the front of TV or remote hand unit the TV can not be turned off. | ||
Sony | KV2670R | DELAYED TUNING, JUNGLE IC-301 | When switching channels, picture flickers and audio is mutedfor several seconds. AFT voltage at Pins 32, 33 of IC103 bounces untilpicture stabilizes. No horiz. sync pulse from Pin 3 of IC301. | ||
Sony | KV2670R | PURITY OFF, REPAIRED DEGAUSING COIL | Minor purity problem in the upper left corner. Hand degauss-ing did not clear problem and could not be adjusted out. The purity wasso far off that the red gun controlled the green phosphor. | ||
Sony | KV2670R | INTERMITTENT SYNC, REPLACE L-506 | Intermittent no sync and no color. | ||
Sony | KV2670R | LOSS OF -33V RESULTING NO CHANNEL DEL/ADD, REPLACE L-105 | Could not erase or add a channel. All channels had to besequenced thru in numerial order. Found no neg -24V or -10V on Pins 6and 7 of IC105 (memory) only when set was on. The -33V supply source waspresent when set was off. | ||
Sony | KV2670R | VERTICAL JITTER ON CABLE, REPLACED TUNER AND ADJ T-201 | Vertical jitter up to 1 inch when connected to cable orsatellite antenna. Off air signal OK. Two sets with the same problem.Dealer exchanged the set and problem presents on replacement unit. Whenunit is connected to cable jitter, it was reduced to 1/2 | ||
Sony | KV2670R | INTERMITTENT SND/PIX, RESOLDERING FREQ SYNTH PPU1 | Very intermittently the picture would turn all snowy. Wefound the Frequency Synth. unit to be improperly seated and poorlysoldered. | ||
Sony | KV2670R | INTERMITTENT AUDIO, SPEAKER LEAD COLD SOLDER | Two units with intermittent audio caused by unsolderedspeaker leads. |