TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KV1957R	Picture overload/interference, install a capacitor	The set would intermittently have an interference in thepicture and sound which would sometimes overload it. the problem wascaused by horiz. noise that was appearing on the u input to the band-switch ic/ic102 pin 3. the noise was not originating from a
SONY	D5	No sled movement	No sled movement in either normal or service mode. flywheeltransistors had been overheated and damaged. replaced 5 flywheel tran-sistors. sled would then move only in one direction.
SONY	KV20XBR	P/n for m bracket and shield case power supply block	I need the part numbers for 1) the plastic frame that the mand d boards are mounted to, and 2) the metal cage that the ga and gbboards slid into. -hq comments: the part numbers you asked for are as follows: 1) m. bracket: 4-374-217-1
SONY	BMC550	No video	No video record, audio ok.
SONY	BMC110	Lines in pix	Lines in pix.
SONY	SL10	Eats tape	Eats tape.
SONY	SL10	Eats tape, intermittent loss of fg	Eats tapes. capstan speed overruns, spilling tape.
SONY	SL20	Unable to tune vhf hi band switches to uhf	Unable to tune vhf hi band switches to uhf tuning with vhf hiindicated. ic401 pin 17 would not go low when vhf hi selected.
SONY	SL2400	Intermittent operation	Apparently glitches were going to the microprocessor andgiving it commands.
SONY	D5	Unit shuts down	Ic508 (pwm drive sled) burns up. also, pin 23 ic501 voltagegoes up to 4vdc when ff is pushed in service mode. it should be only+1.5v.
SONY	CDP70	Motor starts in correct direction, then reverses & overruns	Motor starts in correct direction, then reverses and over-runs.
SONY	CDP70	Motor reverses and spins backwards	Motor starts in forward direction, then reverses and spinsbackwards until shutdown.
SONY	TCW2	Bent motor mounting brackets (no transport)	Tape decks did not work because the motor brackets had beenbent downwards by the weight of the motors. the motors are heavy and thebrackets are made of soft metal, so they can be deformed in normal ship-ping and handling.
SONY	KV8100	Part numbers	I need part numbers of rv303, 305, 306 and 304. -hq comments: the part no. are as follows: rv303 1-226-506-11 brt rv305 1-224-146-11 color rv306 1-224-146-11 hue
SONY	KV25DXR	Service mode problems and no remote or front panel control	1) this unit would not go past #19 in service mode. 2) therealso was no remote or front panel controls and no display. only power on/off worked. found solder blob across s2001 section #4 connecting ic2005pin 21 to 38 all the time. pulling on wires fr
SONY	D5	Q503 failure	On several of these units we are finding q503 is shortingout sometimes along with ic508. in a few cases after replacing alldefective parts and going through all alignments, some of these unitsare coming back after approx. 2 months with repeat failure of
SONY	PSFL9	P/n for upper frame assy	Need part # for upper frame assy. -hq comments: the part number is 4-905-866-01. the number is listed onpage 43 as ref. no. 113.
SONY	CCDV8AFU	Loss of playback chroma, sound and speed regulation	When playing back it, and appears to be going half speed. prerecorded tapes operate'properly. found that pin 3 of ic101 has 3.9v at all times. staticresistance check of c132 shows 7 kΩ.
SONY	FD20A	No service manual for new board and parts	No service manual for new board (a board p/n 1-614-043-11)and parts. -hq comments: pls look to fd-20a supplement no. 5 for the informationsyou need. the supplement p/n is 9-963-120-85.
SONY	KV1311CR	Missing part number, not available, must replace component	Missing part number of cp841 and cp843. -hq comments: the part number for cpxxx components are not listed ins/m because sony policy is to repair these components not to replace them.cp841 consists of three 75Ω resistors (1/6w p/n 1-247-805-00) andcp