25D6F / INTERFUNK [TV]

• When warm UHF channels drift, particularly between channels 33 and 59. (picture attached)
• No contrast.
• E/W correction fault. Picture rounded to centre.
• Switches off by itself. after a few minutes.
• Picture has shifted with approx. 3cm to the right, as if foldover available.
• Contrast and colour will not increase.
• Reduced vertical size.
• Poor contrast, almost negative picture, especially via AV. (service info for INTERFUNK -25D6F)
• Disable hotel mode.
• Dead (intermittently).
• Dead or stuck in standby. (25D6F tips)
• Only black picture and OSD after a while. No sound.
• No functions. Standby LED lit . (with circuit diagram extract)
• Tuning drifts. No TXT.
• Shuts down. after start-up.
• No raster. Possibly sound ok. Standby LED ok. Possibly NICAM LED flashing. (picture attached)
• Switches off after short operation while.
• No function. Standby LED flashes at switch on. No picture. No sound.
• No synch and no text via scart. Ok via HF.
• Impossible to start up from standby. Normally starts up from On/Off switch.
• When TV started up, transistor (S2000AF) instantly burn out.
• Picture is faint and has no vertical synchronization.
• No vertical deflection. Frying noise from PSU.
• Picture collapses to lines, is reduced and drops out after approx. 1 min operation.
• White screen. (picture attached)
• Horizontal tearing. when cold.
• Poor line sync.
• Intermittently switches to standby when on for few minutes; then OK when switched back on; click from speakers when switching off. (with circuit diagram extract)
• Switches to standby. after a while. No start-up. when cold. (+ extract of circuit diagram)
• No audio. OK via SCART . Switches to standby (after a few minutes).
• Vertical amplitude alignment adjustment.
• Dark screen. at start-up. (picture attached)
• Switches to protection mode.
• When cold, switches off almost immediately; symptom gradually improves as appliance gets warmer. If brightness is turned down stops switching off. (part of circuit diagram displayed) (25D6F tip from INTERFUNK)
• Setting U1.
• No colour. No contrast. Picture has shifted horizontally by 5cm towards left-hand side.
• Picture jumps from normal program to noise or to another program.
• Power supply transistor (BUF405A) blown after approx 1½ hrs.
• Green picture. Flyback lines. (extract of circuit diagram attached)
• In cold conditions, PSU triggers. Attempts to start, but it blocks.
• Slow start-up.
• Picture is very blurred and vertical is not synchronised. With a VCR connected to scart picture is synchronised and is ok.
• Dead. Squealing from PSU. (part of circuit diagram displayed)
• Low contrast.
• Low power supply voltages which increase when line transformer is disconnected.
• AFC adjustment.
• Almost negative picture.
• Picture pulls horizontally. OK when warm.
• TV does not function. 50V on 120V line, power supply secondaries OK, line transformer secondaries OK, power supply TEA has been changed, standby light is off, power supply BU oscillograms incorrect.
• Failure of line drive transistor VK01. (25D6F tip from INTERFUNK)
• Horizontal amplitude alignment adjustment.
• Picture has shifted to the left and is black and white. No sound. OSD is positioned correctly, 8362 has been changed. (25D6F tips)
• Screen has white line across.
• Vertical position alignment adjustment. (INTERFUNK - 25D6F information)
• G2 and colour temperature alignment adjustment.
• U1 voltage alignment adjustment.
• Squealing from PSU (after start-up). Excessive horizontal size. (picture attached) (INTERFUNK - 25D6F information)
• Picture adjustment is not done in manual search of channels B and C. Sound adjustment ok.
• No sound in the tuner, picture ok. After a moment TV stops as if there was no programme. Does not stop on channels in channel search. Sound ok in scart. (service info for INTERFUNK -25D6F)
• Teletext decoder alignment. (service info for INTERFUNK -25D6F)
• Interference at switch-off.
• 1 pulse then dead.
• Insufficient picture height.
• Horizontal line. in the centre. (with circuit diagram extract)
• Bright picture with flyback lines after 30 mins. (25D6F tip from INTERFUNK)
• No colour and no contrast (commands do not respond). Display OK.
• Picture tube board 5858 2050 does not fit into the chassis version with the connection plugs.
• Poor contrast via AV, TV-picture also somehow sludgy.
• Appliance breaks down.
• Interference noise in NICAM sound during SECAM-L reception. (by very high volume set-up).
• When using a NINTENDO console, TV does not return to TV mode after putting NINTENDO console into standby.
• Goes into automatic search after operating for a few mins. Channel buttons blocked on the RC. (INTERFUNK - 25D6F information)
• C033 (10uF) runs hot.
• Bright picture. Flyback lines.
• Setting the focus.
• Horizontal roll.
• Adjusting the sound.
• Text processor switches to TEST mode.
• No picture. OSD OK . (picture attached)
• Enter service mode.
• No vertical deflection.
• No start-up (intermittently).
• Trips.
• Sound calibration alignment - Multinorm Module.
• Resistor RK31 has changed colour.
• AGC adjustment.
• Poor vertical linearity.
• Picture and sound muted when standby selected.
• 4cm band at the top and bottom of the screen and picture jumps.
• Colour tint in screen centre after switch-off.
• When sunlight falls on receiver, remote control does not function.
• No picture.
• PSU starts up briefly then no functions.
• TV starts up when cold and cuts out after 20 secs then power supply pulsates. Occasionally functions for 1 hour.
• Faulty PSU.
• If contrast is at maximum, when bright advertisments come up, TV turns off and switches to standby.
• Fails after 3/4 of an hour, no standby LED after replacing line output transformer. Crackling in loudspeaker at switch off. After switch off runs again for only approx 3/4 of an hour.
• No reception in cable network.
• Focus alignment adjustment.
• Dull picture and lack of luminance, chroma OK.
• After line transformer has been changed high voltage flash overs in the focus regulator.
• Picture does not hold.
• Power supply doesn't start up, after restart with mains switch functions OK.
• Enable Hotel mode.
• Screen becomes whiter and whiter. Appliance switches off and then goes to standby. Startup and sound are OK. (25D6F tip from INTERFUNK)
• Reduced horizontal size. intermittently. (25D6F INTERFUNK repair tip)
• Horizontal line, picture dark in AV and can not be switched further.
• Short white lines run through the picture. Background has no picture content. Neither TV sound nor noise can be heard. Picture and sound occur after 10 mins
• Muted audio. intermittently.
• Setting the horizontal amplitude.
• Tries to start up but switches off after a sec.
• Poor audio. No colour. Picture shifted to the left.
• Bright picture. Flyback lines. Switches off by itself. after a few seconds.
• When cold, TDA2653A burns out. (with circuit diagram extract)
• Stuck in standby. (picture attached)
• Power supply collapses. Power supply ok when 26V raster disconnected. (25D6F tip from INTERFUNK)
• Horizontal line.
• Horizontal and vertical holds of both syncs are lost. (25D6F tips)
• Switches to standby (intermittently). (extract of circuit diagram attached)
• Picture crackling at switch on.
• Resistor R050 in PSU fails.
• Numerous defects in power supply.
• Does not display SECAM standard. Operates ok in SECAM via scart. Functions ok in PAL, selection of standard 2 or 3 ok.
• Switches to standby, can be restarted again. No fault when TXT is activated.
• Does not switch on from standby with RC. Other functions are OK. May occur after a few days. (extract of circuit diagram attached)
• Line driver TSVK01 (BC327-25) fails immediately. (25D6F tips)
• Diode VK03 (ZPY 5.6V) is defective.
• AFC alignment check.
• Horizontal output stage fails immediately. (with circuit diagram extract) (25D6F INTERFUNK repair tip)
• Impossible to switch back on again after standby.
• Dead. Standby LED ok. Possibly NICAM LED flashing. Possibly sound ok. (part of circuit diagram displayed)
• Picture loss after 30-40 mins. Audio OK.
• No UHF mode. OK in VHF mode.
• Dim picture. after warm-up.
• No audio. Picture OK .
• No synchronisation. Audio and OSD OK . (25D6F tip from INTERFUNK)
• Standby line whistles. (INTERFUNK - 25D6F information)
• Appliance is dead. when switching on the standby LED flashes once.
• Stuck in standby. Front LED ok at switch on, then standby LED. Front LED and stereo LED flicker successively when tuning in a channel with RC or with front controls. (with circuit diagram extract)
• Loud whistling of the HT when warm.
• Afterglow at switch off.
• Tripping or pulsing. (25D6F tip from INTERFUNK)
• In automatic search channels B and C are not recognised or stored. (25D6F tip from INTERFUNK)
• Buzz in audio.
• Wavy vertical lines, sometimes very obvious, sometimes faint. Noise from low voltage power supply. (picture attached)
• No functions.
• No start up. When switching off by the switch the front LED lights up for a short time. Restricted lamp and sound present before cut off. Nothing if you insist. (service info for INTERFUNK -25D6F)
• After replacing capacitor C033 it fails again within a few months.
• No start-up. (+ extract of circuit diagram)
• Reduced horizontal size.
• PSU pulsates.
• Coloured menu.
• Line tearing. after a few minutes. Switches to standby. (+ extract of circuit diagram) (25D6F tips)
• Blows fuse. intermittently.
• DD01 (TDA8360/62) is defective.
• Low contrast. Low brightness.
• When selecting other than page 100, text comes on with page 888 for eg. Only on some channels.
• EHT appears briefly and PSU cuts out.
• Vertical collapse. (with circuit diagram extract)
• No audio.