TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KV20XBR	Rgb/video led	This report is to be added to the one sent in on 5/1/87.i failed to note that the problem of the rgb/video led's being lit wascaused by c121 related to the manual on/off function. when c121 wasreplaced, the rgb/video led's were still lit.
SONY	SSM910	No video	No video on screen.
SONY	KV25DXR	Locked in with service ready read out	Set was locked in with service ready read out on screen.operation of service switch made no difference. voltage and waveformanalysis did not help to isolate the problem to a particular component.i suspected the memory chip might be the cause so i replac
SONY	CCDV8AFU	No chroma	In camera mode - no chroma in video out, but luminance ok.
SONY	KV2781R	No pincushion, replace r-536 on "d" board	Picture bowed in at sides (pincushioning).
SONY	SLHFR30	No drum lock in betascan	Pb and rec ok, but no drum lock in betascan. excessiveripple on 12v regulated dc line.
SONY	KV1961	Intermittent brightness fluctuations, leakky c307	Intermittent brightness fluctuations. pin 4 of ic301 read1.5v instead of 5.5v as shown in manual.
SONY	SLHF500	Drum ass'y parts change	Original p/n is subbed to a-6050-340-a. connector has roundholes and will not fit into cn1 on the rp-16 board. -hq comments: kcp checked stock and found a few incorrect parts in bin.incorrect type is a-6050-139-a (dsh-21ar, round hole connector). corr
SONY	CCDV110	Viewfinder charactors	Viewfinder will only tell date, time, main and sub titles.everything functions properly. just missing charactor information.
SONY	D3	Intermittent skipping on beginning of disc	According to servicer, unit intermittently skips. alladjustments checked ok. -hq comments: usually, skipping at the beginning or end of the discindicates poor mechanical alignment of the sled drive mechanism. checkcarefully for binding.
SONY	KV2780R	Intermittent high pitched squealing, glue coils on yoke	Intermittent high pitched squealing.
SONY	XR510R	Control functions do not operate correctly	Prior to replacing ic701 there was: very intermittent autoseek, no manual scan, no display change from radio to time, no direct add-ress of presets, no memory preset, no memory scan and no band change. nowthere is no automatic or manual tuner functions.
SONY	XR33	No audio during tape playback	No cassette pb. radio volume normal - no audio on tape.
SONY	CCDV110	Int. loss of picture sync	This unit would int. loose the picture sync. this was causedby the crystal changing frequency.
SONY	SLHF450	Shuttle ass'y	On playback there was video noise. the noise was about 5 to 8lines, random through the screen. looked like shot noise, 2 to 5 of themhorizontally across the screen each being 5 to 8 lines in width. replacedshuttle ass'y, could see nothing wrong with d
SONY	KV2782R	Shuts down, replace damper d-516	When unit is turned on, it will shut down immediately.troubleshoot set using low voltage. found horizontal output distorted.traced problem to a shorted damper diode.
SONY	CFSD7	Part number for control board	Looking for a part number for the control board (w/parts) ifthere is one available. -hq comments: mounted control pcb is no longer available. we can geta blank control pcb from rpc in tokyo if you want one. let us know.
SONY	SL5200	Beta hi-fi light won't turn-on in hi-fi playback	Unit received from authorized servicer. found several patterncuts and jumpers on fs-27 board (1-609-754-11). has there been anychanges? -hq comments: checked board in lab and found it does not agree withschematic or board layout. block diagram is ok.
SONY	CCDV110	After 10 minutes picture distorts - camera only	After 10 or 15 minutes picture would loose color and turn tohoriz. streaking lines on camera only.
SONY	HVL80D	Need p/n for rear housing	Need p/n for rear housing, below ref. no. 6, pg 18 of s/m. -hq comments: this part is unavailable, however i sent one piece fromour lab to jim rosemary in itasca, ill.