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Sony Repair Tips




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Search: sony
Results: 20072
Make Model Symptom Problem Solution By
SONY KV2145R
Dead, fuse & damper diode Unit came in with blown dc fuse and a shorted damper diodemounted on the conductor side of board, cathode connected to cathode ofd501 and anode to ground. this is a production mod. and no informationexists as to its type or part number. as it resembles
SONY KV1922
Jail bars on left side Jail bars on left side. servicer had replaced flyback andyoke - no help.
SONY KV1743R
Repair board compatibility Chassis #scc204a-a found change in m-2 board not reflected onprint. r025 exists in series with ic031. which print applies? are thereany other changes? -hq comments: r025 resistor's function is to fine tune rc constant forvc formation from pwm pulses.
SONY KV1541R
Tuning drift, replaced d2007 After about 8 hours this set would start drifting on low band.servicer claimed that only ch. 2 and 3 would drift, rest of low band ok.upon further inspection i determined that what was actually occuring wasthat low band channels were switching into high
SONY KV1222R
Dead All six above sets were dead out of the carton. inspectionrevealed no b+ to receiver. i then noted the leads to r901 were bothbroken right at the terminals of the resistor. throwing out thepossibility of sabotage, it appears that the problem was cause
SONY KV1207
No picture, see sb0200r Found d064 leaky, this was replaced and 15 days later unitcame back and this time d063 was found to be leaky. ten days later unitcame back with d063 leaky again. each time the diode is replaced.
SONY KV1206
Looses memory, replaced d514 This receiver had no memory. stations could be programmed,but would be lost as soon as channel was changed. inspection revealed thatic034/pin 7 was positive, -24v was missing. scope showed horiz. pulse on-24v line. further checking quickly revealed d51
SONY KV1200U
Intermittent color distortion, replaced c342 Highly intermittent color-wrong colors-complete loss of color.drastic hue changes would occur faces would be all blue or all green.red would drop out completely, then chroma would degenerate into narrowrainbow lines, eventually resulting in absolute loss
SONY KP5040
Parts availability Please investigate if the drive cords for the electromotivearms may be available as a separate part for replacement instead ofreplacing the complete arm assy which is so expensive. refer to page 29of service manual. -hq comments: the pipe side end of d
SONY FD210
Shifted picture, replaced yoke Picture shifted up and slightly to the left.
SONY XR77
Replacement of q801 The sound cuts off with a high level bass signal.
SONY XO7
New ic used The above unit uses upd1703c517 p/n 8-759-100-18. thispart is listed on page 35 of the preliminary service manual. the lasts/m printed list this ic on page 96 as upd1703c522 p/n 8-759-100-59.do they have the same program? if not please inform kc to st
SONY WMD6
Defective fe coil No control of speed, it is too fast on two stock units.
SONY WM10
Careful reassembly required The spring was out of the grove on the auto shut offmechanism. after placing spring in grove and reassembling unit, it wouldnot shut off at end of tape.
SONY WM10
Shorted c805 No power. a short across battery terminals occur whencapacitor (c805) is bent down on the pc board or when the leads arepushed into the body.
SONY WM10
Screw becomes loose Screw on control plate block assy comes loose, touchingbottom side of flywheel.
SONY WM10
Gear needs bending This unit had no take-up. gear #364 was not low enough toengage gear #368.
SONY WM7
Missing part number The part number for the key switch board is not listed in the s/m.
SONY WM7
Replacement part needs modification Membrane circuit board requires modifying from form in whichit is received for proper installation and working in machine (cutting ofmembrane). -hq comments: the circular foil path in the upper most right corner ofmembrane needs to be cut.
SONY TCK777
Defective r/p head With music, poor low freq. response with audio sweep gen.,beat freq. from low end of response up to about 2khz only if sweep washigher than 12khz on the high end.