TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KV1957R	Intermittent shut down, replace c549	Intermittent shutdown.
SONY	SL5000	Need part number for antenna switch unit	When ordering the antenna switch unit by p/n 9-982-040-00,customer keeps getting the antenna terminal strip. we need the currentnumber for the antenna switch unit. -hq comments: the antenna switch is not available as a unit. orderassy #306 p/n 1-464-1
SONY	STRAV560	No memory	Line surge, due to lightning in the area, clears memory.have had this customer bring unit in two times same day. second unitgiven to customer, same problem, would suggest reset button on back ofunit, so customer could reset and reprogram. -hq comments:
SONY	KV1918	Audio dropout	On cable only, audio mutes intermittently. this problem doesnot occur with off-the-air broadcasts. -hq comments: replace neon bulb for the channel location being used.you can also disconnect the mute line ic201 pin 17. if muting stilloccurs, then the
SONY	SL5000	Video noise during pb of timer recorded tape	Customer brought in 4 tapes recorded on timer mode complainingof same problem. recording made in fsc came out ok. can you pleaseexamine enclosed sample and advise? -hq comments: we confirmed the absence of the ctl signal on the sampletape. when the r
SONY	SL2401	Intermittent capstan lock - unstable picture	The unit had been in for service several times with thecomplaint of poor capstan lock. this problem was very intermittent. wefound c20, ctl coupling capacitor, to be intermittent.
SONY	SLHF300	No timer/channel set	This unit had no channel display and it was not possible toset the timer mode. we found ic301 pin 16 to be low. this was caused bya leaky q305.
SONY	TCFX44	Poor freq response	The rec/pb head being supplied for replacement is an8-729-373-40. this head exhibits very poor freq. response in playback.a significant roll off takes place at 6khz. recordings plays back onanother deck are acceptable. we need either the correct head
SONY	KV1917	Periodic audio muting	The customer complained of intermittent audio muting whenusing the cable converter on ch. 3. the muting lasted less than 1 sec.when it occurred. there was no problem with broadcast ch. 3 and theproblem could not be simulated in the shop with a similar
SONY	CDXR7	Service manual correction	Pages 43 and 44 of service manual has r714, 715, 717, 724,722 connected to pin 2, ic6. actually they connect on the other side ofl3 to pin 12, ic8. this is a small flaw, but i was told to send it toyou for your reference. also, could you tell me if th
SONY	XRM10	Service manual error	On page 37, ic371 (la4177) of xam-10 is labeled incorrectly. pin 13 should be pin 2 pin 14 should be pin 1 pin 2 should be pin 13 pin 1 should be pin 14 as shown f
SONY	D5D	No motion after initial run-up	Will not play discs. disc spins briefly and then stops.disc will not spin at all in service mode. other functions appear normal.found that laser was not coming on due to lid switch contacts being bent(s901).
SONY	CDP302	Intermittent play	Intermittent play, skips forward, backward, etc.
SONY	TTS81	Missing part number for motor pulley	We need the p/n for motor pulley on tts-81. see page 23 ofthe manual. -hq comments: the motor pulley is a part of the motor assy (dne-3002a).the part number is a-4608-151-a.
SONY	KV5000	Video detector assembly part number	Video detector diode (d201) is enclosed in a can with r270and c225. servicer claims that he cannot disassemble the can and wantsto know if part number for the assembly is available. -hq comments: there should be no problem with disassembling the can an
SONY	WMF8	Part number for new style motor	Old version wm-f8 (as in service manual) uses separate servoamp and motor. new version uses a motor with servo amp mounted on it.the old motor is type dnr6900a, p/n 8-835-105-01. new motor assembly istype dnr5700a. we need the correct p/n for this mot
SONY	CFS580	Missing part number for lever, panel button	We need the part number for lever, panel button on page 33 ofthe manual. -hq comments: sorry, the part is no longer available.
SONY	KV25XBR	Distorted right channel audio, replaced ic1108	Distorted audio, right channel only.
SONY	CDP302	Mistracking	Mistracks towards end of disc. in addition to alignment,q203 was found to be leaky. also, helpful to repeat tracking alignmentwith number of discs to find medium. -hq comments: when the tracking gain adj. is realigned to several discs,please make sure
SONY	WMD6C	Irregular speed	Set starts with slightly higher speed than normal. after 3-5minutes, speed changes up and down every 1-2 records. the set came backafter about one week, motor will not stop, and speed was about four timesfaster.