STV7150 / OTTOVERSAND [TV]

• Remains in standby, starts up only for a fraction of a sec then goes into standby again. (STV7150 OTTOVERSAND repair tip)
• Reduced horizontal size.
• Buzzing on sound mostly on channels 5, M6 and Canal Plus.
• Switches off by itself (after a while).
• Horizontal band in picture, sound OK.
• Grey picture with flyback lines.
• Line BU508 blows after a few minutes or after 2 or 3 hours operating.
• Focus adjustment.
• Picture shifted vertically. at top.
• Harsh ticking noise when increasing or lowering volume. (STV7150 tip from OTTOVERSAND)
• The sound from one or both of the speakers crackles after operating for a longer time.
• Snow. Picture appears after 1 min.
• IC1 (TEA2164) is defective.
• E/W fault.
• No LED at start up. Low voltages. (STV7150 tip from OTTOVERSAND)
• Spare part info: type of 1C1
• No vertical deflection (intermittently).
• Reduced horizontal deflection.
• Doesn't store or stores only after several attempts. (service info for OTTOVERSAND -STV7150)
• Inverted trapezium distortion, flickering in upper half of picture.
• Line BU destroyed when hot.
• Test mode.
• Line BU blows after 3 hours.
• Predominantly yellow. Picture and sound ok. (service info for OTTOVERSAND -STV7150)
• BU508A constantly becomes defective, picture shifted to the right.
• Slight flyback lines in the top part of the picture.
• No mono sound is present, stereo sound is slightly distorted.
• Picture is drawn in on bottom.
• BU508A always fails.
• Fails. Knock sensitive.
• No tuner reception after repairing power supply. Ok in scart. Tuner voltage ok.
• In HF reception sound is defective. AV ok.
• Colour adjustment.
• No channels over 48. Stations cannot be stored. Some stations in memory are ok.
• No mono. Stereo OK.
• End stageTRS T2 drop-out in vertical deflection.
• Dead. (STV7150 tip from OTTOVERSAND)
• BU508A defective.
• Poor operation of the raster time base. (service info for OTTOVERSAND -STV7150)
• No sound at RF (Multi-IF).
• Picture varies in brightness and is very dark. Picture gets lighter if contrast turned down.
• Slightly compressed picture on right.
• Occasionally picture reappears after switching off with the RCU.
• Horizontal foldover.
• BU508A in the horizontal output stage was defective. After replacing, ticking from loudspeaker, appliance does not start up.
• RGB adjustment in Service Mode.
• Line tearing similar to "mouse teeth" on the picture.
• After switching on mains, appliance only ticks. (LOPT)
• After operating for 3 hours renewed failure of the line BU.
• IC1 blows.
• Linearity distorted on top.
• Functions OK for a few days then picture becomes negative.
• One of the basic 3 colours is missing.
• Backing up in SERVICE mode.
• Adjusting the linearity.
• White screen. Flyback lines.
• Yellow screen with flyback lines. Hardly visible picture. Sound OK on all channels. (OTTOVERSAND - STV7150 information)
• Jerky sound in HF and scart.
• No sound after inserting the station table, sound only reoccurs with stereo transmissions after blanking. With mono by switching over channels.
• One colour missing.
• Switches off by itself.
• The voltage in the vertical stage is too high (instead of 17.3V it is over 40V). It is already measurable at diode D11 (BY299). The appliance runs occasionally if you start it up for a longer time (10 mins).
• Value of resistor R15.
• No audio and video IF.
• Some (high) channels can't be adjusted.
• Power supply pulsates. Very low secondary voltages.
• No picture. No sound. The PSU oscillates. No CRT heating.
• Hum in sound via RF. Picture OK. Picture and sound OK via scart.
• Picture and sound OK but strong predominant green.
• Screen has unstable coloured bars. Picture is perfect via scart.
• Vertical centre adjustment.
• Sound fails when set is warm. Sometimes also left and right picture pinching.
• Flyback lines. at top.
• Horizontal centering adjustment with teletext.
• Moves from channel over channel 42. Storing channels below channel 42 OK. No storing of channels over channel 42.
• Vertical centre adjustment. (OTTOVERSAND - STV7150 information)
• No channel storing.
• Wavy lines when connecting to a muli-user aerial in a block of flats. Channels which lie close together distort the reception in BIII.
• Adjusting the white setting.
• Shuts down (intermittently).
• No or weak red, green or blue.
• Squealing noise. Full brightness on the picture.
• Picture centering adjustment.
• No picture content with a max adjusted G2 regulator. (STV7150 OTTOVERSAND repair tip)
• Memory command is acknowledged but not carried out. Transmitter symbol can be written but not stored.
• Setting the centering.
• Sound is low and peak level distorted.
• After pressing the mains switch and finally switching on with the remote control or the button on the appliance, sometimes there is no picture and no sound. You can hear the horizontal output stage functioning.
• Adjusting the vertical amplitude (coarse and fine).
• When switching on the picture is dark then you can see a white horizontal line in the top half of the screen.
• Picture is very distorted, horizontal deflection fault; line output stage oscillates incorrectly; appliance whistles and after approx 1 min switches to stand by.
• Vertical interference lines on the left side of the picture. (STV7150 OTTOVERSAND repair tip)
• E/W fault. Picture collapses.
• EHT does not start up.
• Low audio. OK via SCART .
• Occasionally picture reappears after switching off with the RCU.
• Ref of T1, value of R5 and R6?
• Line output stage does not oscillate correctly.
• No picture, T2 (BD683) gets hot. At switch on the picture up to T2 gets so hot that the 17.5V fails. Picture has then disappeared and the voltage dropped to 3V.
• Horizontal centre adjustment.
• Slight, distorted horizontal stripe on the picture. Line pairing visible. Hum runs through from top to bottom.
• One colour missing. (No blue, red or green)
• Vertically reduced picture.
• S/C on the mains side.
• Pincushion distortion adjustment.
• No picture. No audio.
• Blue picture.
• When switching on, short attempt to start up. Standby LED lights up.
• T1 (BU 903) in the primary power supply fails repeatedly in different circumstances.
• Blank raster and controls do not work.
• Occasionally goes to standby. Then can be switched on again.
• Value of T15?
• Linearity at top edge of picture cannot be adjusted ie pic. is tightly compressed at the top.
• TEA2164 is burnt. (OTTOVERSAND - STV7150 information)
• Adjusting the horizontal amplitude.
• Geometry adjustment.
• A colour is missing or strong striations and flags.
• Adjusting theoperating voltage.
• 9cm horizontal picture shift on right side. Picture ok in reception via scart.
• No reception in upper channel range. Analog values and programs can not be stored.
• Store analog values (contrast, brightness) as standard/PP values. (STV7150 tips)
• Line output stage transistor fails again after a short time. (service info for OTTOVERSAND -STV7150)
• No CRT heating.
• T2 in the vertical stage comes flying out after approx 30 mins. IC1 and C5 already replaced in this stage.
• Stuck in standby. Short rustle of EHT at power on.
• Operating voltage adjustment.
• Stuck in standby.
• E/W Pin cushion too large and E/W pin cushion too small adjustment.
• Red striations on the picture.
• No sound at RF reception (Multi-IF). Mostly knock sensitive.
• Sound buzzing when picture background is white.
• Horizontal centre adjustment.
• Picture has a green flyback line.
• Top quarter of picture is dark and pulled, if appliance is cold. (OTTOVERSAND - STV7150 information)
• Line tearing in dark sections of picture, mostly at VCR PB.
• Green LED flickers in front panel, no EHT.
• TXT and OSD displaced to the left or right.
• No sound with mono transmissions.
• Line BU (BU508A) S/C.
• Screen is red and has no picture content. On screen function is not visible.
• Vertical amplitude, coarse, vertical amplitude, fine adjustment.
• Black screen. No audio. OSD OK .
• How to store channels.
• No picture. Audio OK .
• Line is folded over, it is set to the wrong standard. Does not synchronise.
• Enter service mode.
• Line transformer whistles after 15-20 mins and a short time afterwards BU fails.
• At start up, blows suddenly then stops. (service info for OTTOVERSAND -STV7150)
• No start-up.
• After approx 3 hours, goes into standby. Then can be started and continues running.
• CCU snow.
• Vertical line. at top. (service info for OTTOVERSAND -STV7150)
• Spare part info: type of power supply transistor.
• Focus adjustment.
• Chirping when picture is bright.
• The PSU will not oscillate.
• Station storage (special channels) on some channel sites are suddenly no longer possible. After pressing Memory, station drifts.
• No video and audio IF.
• Adjusting the brightness and contrast.
• Line output transistor fails repeatedly.
• Reduced vertical size.
• PSU doesn't oscillate.
• Black balance adjustment.
• Picture is like a negative when the contrast button is pushed.
• Poor synchronisation. Lines in picture (when cold).
• No function via the RC. Operation on appliance is ok.
• PSU pulsates in 50Hz cycle.
• Appliance does not switch on. Standby is on. When attempting to switch on there is a short build up of high voltage.
• Brightness and contrast adjustment.
• Important problem in PSU.
• Colour adjustment.
• White adjustment. (STV7150 OTTOVERSAND repair tip)
• Excessive horizontal size. (STV7150 OTTOVERSAND repair tip)
• Linearity adjustment.
• Cushion adjustment.
• Picture is noisy and occasionally too small.
• Black adjustment.
• Set at full volume it is too quiet and a strong hum can be heard.
• Does not start, standby ok. If you hold in place the On switch high voltage occurs and appliance hisses, after you release the switch, goes immediately to standby again.
• Linearity fault at the top of the picture.
• Factory setting for tube A 63 NCQ 00X 08
• Lines have shifted by approx 2mm each line.
• No tuning.
• How to access control SERVICE mode to correct height and East/West.
• On standby the PSU runs but after turning the set on, it only starts up for a moment and returns to standby. (STV7150 tips)
• Picture is displaced to the bottom of the screen. Fault recedes when appliance warms up.
• Picture too small.
• Transistor T2 type.
• No standby and start up indication.
• Slight E/W fault, appliance switches off after a short time. Then loud chirping in Stand-by mode.
• Fine red bar at bottom of screen. It appears on side of screen when power supply pot. is used.
• The picture changes occasionally (varies).
• No start up, line BU ok. No standby light on, TEA2164 changed, fuse ok, power supply pin 2 TEA2164 ok.
• Horizontal size adjustment.
• PSU does not start. No starting attempt.
• Colour missing (for ex. red).
• Bright picture. Flyback lines. (with circuit diagram extract)
• No blue.
• Pin cushion.
• Ticking at switch on and the green LED may flicker.
• No functions. (STV7150 OTTOVERSAND repair tip)
• Top half of the picture is ok, but the bottom half is bent with a white line in the centre.
• No raster. Sound and line transformer present.
• Switches off by itself. after a few seconds.
• No vertical deflection.
• Attempts to start via RC but switches off. Standby OK.
• Power supply voltages are too low and only increase slightly if the "ON" switch on the control panel is held in.
• Chirping. Picture at max. brightness. High voltage crackling near the deflection unit.
• Incorrect colour. Yellow with flyback lines (no blue).
• PSU fails every few days. IC201, R216 and T201 are then defective.
• Horizontal stripes in the top third of the picture. The upper linearity is limited.
• Picture cuts out after a few mins. Sound and channel change ok. Difficulties at start up if TV is switched off.
• Type of transistor T5. (service info for OTTOVERSAND -STV7150)
• Vertical lines.