LEONARDO2525VT / BAUR [TV]

• Blocks and wrong OSD indication.
• Shutsdown with motorboating noise after 10 minutes.
• Line tearing at vertical lines from top to bottom in test picture.
• Picture jitters.
• No reaction from front controls and RC. Also no switchover possible to HF.
• Cycles on/off.
• Dead. Power LED lit . (extract of circuit diagram attached)
• Microprocessor/eprom screening plate.
• Occasional picture foldover at the top on certain programas when changing picture or channel.
• Upper part of picture consists of a few lines. (picture attached) (LEONARDO2525VT BAUR repair tip)
• No colour. (extract of circuit diagram attached)
• Low contrast. (+ extract of circuit diagram)
• Popping noise from speakers, only at switch on.
• Display has corrugated verticals. (with circuit diagram extract)
• Line pairing at top half of picture. (part of circuit diagram displayed)
• Does not respond to commands in first 5 mins.
• Dead. (extract of circuit diagram attached)
• Poor line synchronisation. (extract of circuit diagram attached) (service info for BAUR -LEONARDO2525VT)
• One colour missing. (part of circuit diagram displayed)
• No red.
• After operating for approx 1.5 hours the appliance switches to search mode by itself.
• Line transformer crackles.
• No audio (intermittently). (extract of circuit diagram attached)
• No tuning.
• No RC functions. (part of circuit diagram displayed)
• No blue. (+ extract of circuit diagram)
• Tuning drifts (intermittently). (part of circuit diagram displayed)
• "F7" displayed.
• No synchronisation. when cold. (extract of circuit diagram attached)
• Sound is distorted and disappears as the volume is turned up. (picture attached)
• Fine, dark horizontal lines when warm.
• IC7720 does not function correctly. (+ extract of circuit diagram)
• Erratic functions on satellite RX.
• Supply voltage cuts out, appliance whistles.
• Fine dark horizontal lines on picture after a short time. Picture slowly goes to line tear effect with vertical jitter; intermittent mute sound, then goes to standby.
• No OSD. (+ extract of circuit diagram)
• Not operational. F7 in picture.
• Only chroma lines in VCR.
• Protection IC7380 BB panel. (BAUR - LEONARDO2525VT information)
• Disable hotel mode.
• Page 811 appears by itself and is blocked.
• Only part picture can be seen, sound OK. (with circuit diagram extract) (service info for BAUR -LEONARDO2525VT)
• Switches spontaneously to program 1. (part of circuit diagram displayed)
• Horizontally torn picture.
• The R3661 resistor is in open circuit. (extract of circuit diagram attached)
• PSU failure.
• Picture flares. (extract of circuit diagram attached)
• Codes F4 or F7 with no signals and LED orange.
• A production change:
• Rattle in sound. (with circuit diagram extract)
• No picture. TXT OK .
• F0, UHF and P1 indication after approx 30 mins then no function.
• F5 Error on sets with satellite RX.
• Horizontal picture pulling especially with vertical lines. Fault disappears when warm. (with circuit diagram extract)
• No sound. No channels switching. Error code F7 appears on screen (TXT board).
• No picture. OSD OK . (extract of circuit diagram attached) (BAUR - LEONARDO2525VT information)
• Strange signs in picture or text. EXT 1 and EXT 2.
• Only one horizontal line at bottom of screen.
• Lines in picture. (with circuit diagram extract)
• F7 upon switch on, or intermittent F7.
• Mono/stereo display error. (service info for BAUR -LEONARDO2525VT)
• Pulsing, rolling with jagged white line at top of screen.
• PSU pulsates. (LEONARDO2525VT BAUR repair tip)
• +95V is incorrect. (part of circuit diagram displayed)
• Chopper transistor (BUT11AF) S/C. (picture attached)
• Purity fault.
• How to convert from G90 + SAT RX to standard G90.
• No text, F7 displayed. (with circuit diagram extract)
• Blurry picture. Audio OK . (BAUR - LEONARDO2525VT information)
• Does not tune optimally. (+ extract of circuit diagram)
• Vertical foldover. Flyback lines.
• Tuning drift or no signals though the green bar moves. (+ extract of circuit diagram)
• Lines in picture. on the left.
• Data lead to microprocessor on main board from satellite RX.
• No sound and "F7" on OSD, OK after 20 mins.
• Tripping (after start-up). (extract of circuit diagram attached)
• Teletext faults. Set very intermittently shows error F7. (part of circuit diagram displayed)
• Does not function well. Wrong characters on screen. (extract of circuit diagram attached)
• U743 tuner replacement.
• Difficult front control operation.
• No start-up. Green LED flashes . (BAUR - LEONARDO2525VT information)
• Intermittently displaying error code F7.
• No synchronisation. (picture attached)
• Switches off by itself.
• Stuck on channel 8. No front controls or R/C operations. Standby LED flashing. (+ extract of circuit diagram)
• No picture. Audio OK . (part of circuit diagram displayed)
• No tuning. Snow in picture. (picture attached)
• Switches back to program 1.
• Lines in light areas and letters. Improves when contrast reduced. (part of circuit diagram displayed)
• Useful voltages to check on satellite RX board
• Intermittent audio. (part of circuit diagram displayed)
• Thin horizontal black lines in upper picture area. Error is shock sensitive in the beginning, then becomes permanent.
• Distorted picture. OK via SCART .
• Picture becomes dark from time to time, cannot be adjusted. (extract of circuit diagram attached)
• Horizontal jitter. in the centre.
• Appliance works perfectly for a few days and then all the components burn out on the primary side of the switching circuit. (part of circuit diagram displayed)
• LED blinks in STANDBY mode. (extract of circuit diagram attached)
• Power supply defective.
• Vertical shaking. No synchronisation.
• Raster lines at the top of the picture, approx. 5 cm wide.
• Shape of picture is wrong. The fault is more evident in text mode. Also thin black horizontal lines.
• The mains transistor BUT11 permanently blows at switch on. (picture attached)
• The output transistor of the power supply is defective. BUT11AF, BUT18AF or 2SC3973B. (with circuit diagram extract)
• BUT11AF is defective and is destroyed at each start up. (part of circuit diagram displayed)
• The power supply is noisy in standby. (+ extract of circuit diagram)
• No colour in French standard.
• Outlines are distorted in the top part of the picture and intermittently no colour.
• Flashover on picture tube print. (extract of circuit diagram attached)
• Intermittently strange signs in picture. No function of RC. (picture attached)
• Reduced vertical size. Vertical foldover at top. (part of circuit diagram displayed)
• Intermittently F4 appears. Dark picture.
• Blows fuse.
• Light picture content with coloured background.
• Snowy raster. (with circuit diagram extract)
• No focus.
• Dead. Standby LED flashes .
• No tuning. No display. No RC functions. (with circuit diagram extract)
• Wide oscillation in the weak field on the right hand side. (picture attached) (BAUR - LEONARDO2525VT information)
• TS 7625 breaks frequently. (part of circuit diagram displayed)
• No picture. (LEONARDO2525VT tip from BAUR)
• No audio. Picture OK . (+ extract of circuit diagram)
• Limited contrast control range. (extract of circuit diagram attached)
• Line output transformer information.
• Blank raster. No sound. No OSD. RC LED does not flash when a command is transmitted. (part of circuit diagram displayed)
• Stuck in standby.
• Humming, ticking. (picture attached) (service info for BAUR -LEONARDO2525VT)
• Switches off automatically for a short time and restarts with program1. Picture drops out or switches off.
• No start-up. Squealing from PSU. (BAUR - LEONARDO2525VT information)
• No channel storing.
• "F7" on OSD. No audio and stuck on channel. OK after 20 mins.
• Does not go to standby via RC; LED on set changes from green to orange (should be red).
• No adjustment to low volume. (picture attached)
• Light spot after switch off. (extract of circuit diagram attached)
• Shuts down. (picture attached)
• Hiccups and returns to channel 1. Unable to reset. (extract of circuit diagram attached)
• Destroys BUT11 and bridge rectifiers on switch on. (part of circuit diagram displayed)
• Faulty OSD. (LEONARDO2525VT tip from BAUR)
• Pal/Secam chroma identification problem.
• Intermittent fuse blowing, blows BUT11AF. (part of circuit diagram displayed)
• Problems with FLOF TXT. Cannot find page 811 whereas in spite of this page is broadcast. TXT header remains on subtitling. (with circuit diagram extract)
• Low picture contrast. Cannot be controlled via user control.
• F4 Error with arrows on sets with satellite RX.
• Dead (intermittently).
• If appliance is switched to standby when cold, it starts pumping. Other functions OK.
• Searches for channels continuously. (with circuit diagram extract)
• Black lines in picture, then no picture.
• No picture. in the centre.
• Dark picture. (with circuit diagram extract)
• Incorrect OSD characters.
• Squealing from PSU. Audio and picture OK . (+ extract of circuit diagram)
• To loop the video through not using circuitry on satellite RX.
• Ragged picture. Dim display. (extract of circuit diagram attached)
• Bright raster. Poor vertical linearity. (with circuit diagram extract)
• Corrugated verticals. (+ extract of circuit diagram)
• Chroma fault in SECAM. (part of circuit diagram displayed)
• Standby LED continuously flashing.
• Reduced vertical size. (with circuit diagram extract)
• No functions. LED blinks . (part of circuit diagram displayed)
• Does not switch to standby.
• No functions. (picture attached) (LEONARDO2525VT BAUR repair tip)
• Tripping (intermittently).
• Noise from PSU.
• Video signal and sound are missing, raster is blank. (with circuit diagram extract)
• Addition of fuse 1670.
• No vertical deflection. (extract of circuit diagram attached)
• Breakdown of T7625. (+ extract of circuit diagram)
• After switching on with the on/off switch the Stand by LED comes on for a short time and then goes off again at once. The same thing happens with the remote control.
• Picture becomes narrow, lighter and disappears.
• Black dots in the bright-white spots.
• Tuned stations change constantly in the upper tuning areas VHF (B III) and UHF.
• No synchronisation (intermittently).
• Tripping with clicking via speaker. (+ extract of circuit diagram)
• No signal to the collector BUT11AF. (picture attached)
• Dead. LED blinks .
• Hum in audio. Horizontal lines.
• Switches to program 1. Fault occurs especially at greater brightness. The switch over occurs after vertical line tearing (e.g. in convergence test pattern) or after horizontal lines in normal pictures.
• Poor audio. (extract of circuit diagram attached)
• Loss of sound. STEREO/MONO indication lit.
• Defective switching transistor in the SOPS supply. (picture attached)
• Distorted picture. when cold.
• Sizzling/picture distortion.
• PSU shutsdown with popping sound. LEDs flashing.
• Hum (interference noise) from speaker in standby. (extract of circuit diagram attached) (service info for BAUR -LEONARDO2525VT)
• Remote V/S. Green LED goes red. Spurious nonsense on-screen graphics. Goes to standby after running for 30 mins - 2 hrs. Loss of tuning.
• Erratic clock.
• Tripping. at start-up.
• Random failure of the BUT11AF chopper transistor. (with circuit diagram extract)
• Does not switch on when cold. Strange oscillating noise from PSU. Green LED flashes quickly. Picture appears after a few mins but extremely noisy.
• No or poor synchronisation.
• Picture is missing, LED displays F4. (extract of circuit diagram attached)
• Over-voltage circuit active. (with circuit diagram extract) (LEONARDO2525VT BAUR repair tip)
• Intermittently sound mutes and OSG are jumbled.
• No horizontal synchronisation. in TXT. (+ extract of circuit diagram)
• Fluttering noise.
• The appliance will not tune stations higher than 55, the tuning varies. (with circuit diagram extract)
• When appliance is switched on it jumps to channel 3 then when the appliance is warm it shuts down. (picture attached) (LEONARDO2525VT tip from BAUR)
• No picture. No sound. No RC function. LED lights up green.
• Insufficient contrast. When readjusting, brightness is also adjusted. teletext is O.K. (extract of circuit diagram attached)
• No or poor operation of RC and front controls. No picture when cold. (with circuit diagram extract) (LEONARDO2525VT BAUR repair tip)
• Intercarrier-hum. (extract of circuit diagram attached)
• Line output transistor 7545 (BUT11AF) fails after a while.
• Flyback lines. at top.
• Poor tuning. Search sometimes does not stop. Picture shifted and trembles. (extract of circuit diagram attached) (LEONARDO2525VT BAUR repair tip)
• No functions. after a few minutes.
• No teletext. No F7 error. Can still change channels in text mode.
• After a few hours there is a slight reduction of brightness. When changing channel manually the display reads F4 or F7. (picture attached)
• After tuning the channels cannot be stored. The appliance memorises one channel by itself. (with circuit diagram extract)
• Short circuit in the power supply.
• Blue picture. (+ extract of circuit diagram)
• No picture content for the first ten minutes. White picture with flybacks lines.
• The remote control and the operation unit shut off after approx.10 min.Later strange symbols appear on the screen. (with circuit diagram extract)
• On PB strange symbols or text appears on the screen. (service info for BAUR -LEONARDO2525VT)
• Teletext faults. Page 811 appears spontaneously. (extract of circuit diagram attached) (LEONARDO2525VT tip from BAUR)
• Faulty TXT.
• Squealing from PSU.
• Tripping. (part of circuit diagram displayed)
• Picture and sound are missing, LED flashes at switch on, ok in standby.
• Picture rolls and bounces in the first 5 mins. An approx. 5cm wide vertical line on the left picture edge. After 5 mins. of operation everything OK.
• D5770 (ZTK33B) fails repeatedly. No tuning or tuning drifts. (with circuit diagram extract)
• Low output from power supply.
• Teletext faults. Characters wrong. (with circuit diagram extract)
• Set blocks. (extract of circuit diagram attached)
• No text, front controls perform wrong task. (extract of circuit diagram attached)
• Cogging down sides of picture. (with circuit diagram extract)
• No tuning. only on certain channels.
• No horizontal deflection. Standby LED flashes .
• The "LE" voltage is less than 100V. (+ extract of circuit diagram)
• For 5 minutes zigzag edges in the picture. (picture attached)
• Blank raster. TXT OK . (+ extract of circuit diagram)
• Picture darkens slightly with remote control commands having no effect after about 2 hours. Display shows F4 or F7. (picture attached)
• Trips few mins after switch on, increasing in speed until popping approx twice per sec. (part of circuit diagram displayed)
• Trips, plop in speakers.
• Intermittently trips. Picture pulses to low width. Reduced height. Raster flashes.
• No E/W, oscillation wide in narrow field on right side.
• Low HV. intermittently. (with circuit diagram extract) (LEONARDO2525VT tip from BAUR)
• The voltage of +95V line alters. (with circuit diagram extract) (LEONARDO2525VT tips)
• "F7" displayed on OSD, LED flashes and user controls inoperative.
• Drifts through the tuning, unprogrammable.
• PSU blows immediately at every switch on. (service info for BAUR -LEONARDO2525VT)
• "F7" on OSD. No sound. LED flashing. OK after 20 mins. (part of circuit diagram displayed) (BAUR - LEONARDO2525VT information)
• After working normally for approx 2 hours, the TV blocks. "EX" appears on the screen. The remote control receiver does not function.
• Spot lights after switching off. (+ extract of circuit diagram)
• Picture only 3cms high.
• Intercarrier buzzing is audible.
• Vertical collapse. (extract of circuit diagram attached)
• Crackling/bubbling sound from speaker when switched to standby after a short time. (with circuit diagram extract)
• Vertical striations and shading on left hand side of picture accompanied by smearing. Intermittent loss of line lock.
• No red in the picture with an RGB input.
• Zig-Zags edges on picture.
• No TXT. No picture. after a while.
• Intermittent standby; loss of signals, colour and contrast. (with circuit diagram extract)
• Doesn't start, at switch-on LED green, then goes back to standby, doesn't respond to RC.
• After switching on the appliance functions normally. If colour, brightness or volume setting is selected with the remote control then apart from switching over channels and switching the appliance on and off no function is possible.
• Picture is bowing on edges for couple of minutes.
• Appliance stuck on programme "1". OSD shows F7.
• The power supply gurgles if the mains voltage is weak. (part of circuit diagram displayed)
• Poor functioning of RC receiver at switch on from standby. RC must be close to IR receiver.
• When warm there is a raster fault on the left.
• EHT low and line output transformer makes a fizzing noise. (+ extract of circuit diagram)
• Sound crackles and LED flashes green in the same rhythm.
• The voltage is too weak. (part of circuit diagram displayed)
• Appliance runs perfectly, switches to standby then pumps the PSU.
• No regulation. (extract of circuit diagram attached)
• Memory loss. (with circuit diagram extract)
• No colour (at start-up). (+ extract of circuit diagram)
• Incorrect characters on the screen.
• No line oscillation.
• No audio. No picture. (picture attached)
• Error codes.
• CDI picture comes through on TXT with G90AE chassis.
• Tuning drifts. Poor picture (when cold).
• After approx 30 mins faulty OSD and no function. No start-up furthermore.
• No switch to AV. EXT1 or EXT2.
• Certain channels drop out in UHF range.
• Manufacturing error. (BAUR - LEONARDO2525VT information)
• No tuning search. No channels change. No numbers on display.
• Sometimes remains in standby when switched on with the help of mains switch.
• Light and dark vertical lines on left of picture. TXT does not function. OK when warm. (+ extract of circuit diagram)
• Horizontal collapse (intermittently).
• Stops when warm. Display shows F7.
• Only programme 6 at switch on. F7 on display. No control. No function of keys or RC. (with circuit diagram extract)
• Jumps to channel 1 or switches off itself. (extract of circuit diagram attached) (service info for BAUR -LEONARDO2525VT)
• Shuts down (after a few minutes). PSU pulsates.
• Reduced horizontal size.
• The BUT11AF is destroyed after some time. (part of circuit diagram displayed)
• No VHF1 and VHF3 function.
• No picture. Blank raster. (+ extract of circuit diagram)
• Shuts down. after a while.
• Black horizontal lines in picture.
• Intermittently returns to channel 1, accompanied by a sound of arcing around tube base.
• Cycles on/off (intermittently).
• F7 error clears after a few minutes. (with circuit diagram extract)
• Snowy picture. No sound. LED flashes alternately green and yellow. No control via user control and RC. After approx. 5 mins operation, functions ok.
• Fault codes F4 or F7 with no signals and orange LED.
• Character error.
• No sound at switch on. Picture is present. "F7" displayed on screen. No RC. Everything OK when warm.
• Only noise, otherwise no functions or display.
• Missing 95V.
• Interference lines when cold but not when warm.
• Does not tune properly and will not stop on stations. (+ extract of circuit diagram)
• Line lock is incorrect.
• No line timebase operation. (part of circuit diagram displayed) (LEONARDO2525VT tip from BAUR)
• No sound, F7 error code LED flashes. (extract of circuit diagram attached)
• In TXT, takes about 60 secs to build up page. Page never quite fills up completely with data, thus looking confusing.
• Trips with power LED flashing and speaker popping in unison. (extract of circuit diagram attached)
• Blocked control. Error F7. LED flashing. (service info for BAUR -LEONARDO2525VT)
• White screen. (extract of circuit diagram attached)
• No function. Rapid loud popping noise with synchronised standby LED flashing.
• Reset after a no. of hours, switches back to programme 1.
• Does not stop when sweep tuning. Drifts if manually tuned. (with circuit diagram extract)
• The raster pulls. (part of circuit diagram displayed) (LEONARDO2525VT BAUR repair tip)
• Tuning drifts. (+ extract of circuit diagram)
• Displaying error code F7 intermittently. (+ extract of circuit diagram)
• No picture. AV OK . (part of circuit diagram displayed)
• Excessive vertical and horizontal size. (part of circuit diagram displayed)
• Vertical streaks at the left of the picture which disappear after a while. (+ extract of circuit diagram)
• No picture. at start-up.