779781 LEONARDO2350 / HANSEATIC [TV]

• The power supply gurgles if the mains voltage is weak. (+ extract of circuit diagram)
• Intermittently strange signs in picture. No function of RC. (with circuit diagram extract)
• Flyback lines. at top.
• No tuning.
• Trips few mins after switch on, increasing in speed until popping approx twice per sec. (part of circuit diagram displayed)
• Trips with power LED flashing and speaker popping in unison. (+ extract of circuit diagram) (779781 HANSEATIC repair tip)
• The "LE" voltage is less than 100V. (+ extract of circuit diagram)
• Switches spontaneously to program 1. (part of circuit diagram displayed)
• No picture. Audio OK . (with circuit diagram extract)
• No tuning. only on certain channels.
• Spot lights after switching off. (part of circuit diagram displayed)
• Blows fuse. (779781 HANSEATIC repair tip)
• No line timebase operation. (+ extract of circuit diagram) (service info for HANSEATIC -779781)
• After operating for approx 1.5 hours the appliance switches to search mode by itself.
• Supply voltage cuts out, appliance whistles.
• Intermittent fuse blowing, blows BUT11AF. (with circuit diagram extract)
• Black horizontal lines in picture.
• Tripping. at start-up.
• Intercarrier buzzing is audible.
• Tripping. (+ extract of circuit diagram)
• No tuning search. No channels change. No numbers on display.
• Does not tune properly and will not stop on stations. (+ extract of circuit diagram)
• Poor functioning of RC receiver at switch on from standby. RC must be close to IR receiver.
• Tuning drifts. (+ extract of circuit diagram) (779781 tip from HANSEATIC)
• Error codes.
• Switches off by itself.
• The output transistor of the power supply is defective. BUT11AF, BUT18AF or 2SC3973B. (with circuit diagram extract)
• Shape of picture is wrong. The fault is more evident in text mode. Also thin black horizontal lines.
• Short circuit in the power supply.
• No synchronisation. when cold. (extract of circuit diagram attached)
• One colour missing. (+ extract of circuit diagram)
• Does not function well. Wrong characters on screen. (part of circuit diagram displayed)
• Reset after a no. of hours, switches back to programme 1.
• No tuning. Snow in picture. (picture attached)
• Hum (interference noise) from speaker in standby. (extract of circuit diagram attached)
• "F7" displayed.
• Teletext faults. Page 811 appears spontaneously. (with circuit diagram extract) (779781 tip from HANSEATIC)
• Occasional picture foldover at the top on certain programas when changing picture or channel.
• Set blocks. (with circuit diagram extract)
• Sound crackles and LED flashes green in the same rhythm.
• Appliance works perfectly for a few days and then all the components burn out on the primary side of the switching circuit. (+ extract of circuit diagram)
• F4 Error with arrows on sets with satellite RX.
• Blocks and wrong OSD indication.
• No vertical deflection. (with circuit diagram extract)
• Tuning drifts (intermittently). (+ extract of circuit diagram)
• On PB strange symbols or text appears on the screen.
• Squealing from PSU.
• Pulsing, rolling with jagged white line at top of screen. (service info for HANSEATIC -779781)
• Vertical shaking. No synchronisation.
• Low output from power supply.
• Cycles on/off.
• PSU failure.
• No reaction from front controls and RC. Also no switchover possible to HF.
• Horizontal picture pulling especially with vertical lines. Fault disappears when warm. (extract of circuit diagram attached) (779781 tips)
• Cycles on/off (intermittently).
• Raster lines at the top of the picture, approx. 5 cm wide.
• Mono/stereo display error.
• After working normally for approx 2 hours, the TV blocks. "EX" appears on the screen. The remote control receiver does not function.
• Stuck in standby.
• CDI picture comes through on TXT with G90AE chassis.
• Switches back to program 1.
• No picture. at start-up.
• Limited contrast control range. (picture attached)
• Page 811 appears by itself and is blocked. (779781 tips)
• Data lead to microprocessor on main board from satellite RX. (779781 tip from HANSEATIC)
• Erratic functions on satellite RX.
• When warm there is a raster fault on the left.
• No switch to AV. EXT1 or EXT2.
• Intermittently displaying error code F7.
• Shuts down. after a while.
• No audio. No picture. (part of circuit diagram displayed) (779781 tips)
• Picture becomes narrow, lighter and disappears.
• 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.
• F7 upon switch on, or intermittent F7.
• Upper part of picture consists of a few lines. (with circuit diagram extract)
• Shutsdown with motorboating noise after 10 minutes.
• No start-up. Squealing from PSU.
• Rattle in sound. (with circuit diagram extract)
• No audio (intermittently). (with circuit diagram extract)
• Sound is distorted and disappears as the volume is turned up. (picture attached)
• No colour in French standard.
• Strange signs in picture or text. EXT 1 and EXT 2.
• Doesn't start, at switch-on LED green, then goes back to standby, doesn't respond to RC.
• After tuning the channels cannot be stored. The appliance memorises one channel by itself. (with circuit diagram extract)
• No focus.
• Teletext faults. Set very intermittently shows error F7. (with circuit diagram extract)
• The voltage is too weak. (part of circuit diagram displayed)
• Picture and sound are missing, LED flashes at switch on, ok in standby.
• Corrugated verticals. (with circuit diagram extract)
• Fluttering noise.
• Trips, plop in speakers.
• Intermittently returns to channel 1, accompanied by a sound of arcing around tube base.
• Power supply defective.
• F5 Error on sets with satellite RX.
• No sound and "F7" on OSD, OK after 20 mins.
• Only chroma lines in VCR.
• Drifts through the tuning, unprogrammable.
• Dead. LED blinks .
• The power supply is noisy in standby. (part of circuit diagram displayed)
• The raster pulls. (+ extract of circuit diagram)
• TS 7625 breaks frequently. (with circuit diagram extract)
• No picture.
• PSU blows immediately at every switch on.
• No audio. Picture OK . (with circuit diagram extract)
• For 5 minutes zigzag edges in the picture. (picture attached)
• Display has corrugated verticals. (+ extract of circuit diagram)
• Microprocessor/eprom screening plate.
• Wide oscillation in the weak field on the right hand side. (+ extract of circuit diagram)
• Does not respond to commands in first 5 mins.
• Intermittent standby; loss of signals, colour and contrast. (part of circuit diagram displayed) (779781 HANSEATIC repair tip)
• Vertical streaks at the left of the picture which disappear after a while. (extract of circuit diagram attached)
• No teletext. No F7 error. Can still change channels in text mode.
• Intercarrier-hum. (+ extract of circuit diagram) (service info for HANSEATIC -779781)
• After approx 30 mins faulty OSD and no function. No start-up furthermore.
• Random failure of the BUT11AF chopper transistor. (+ extract of circuit diagram)
• Vertical collapse. (part of circuit diagram displayed)
• No blue. (part of circuit diagram displayed)
• No colour. (extract of circuit diagram attached)
• No sound, F7 error code LED flashes. (part of circuit diagram displayed)
• Zig-Zags edges on picture.
• No VHF1 and VHF3 function. (779781 tips)
• Picture darkens slightly with remote control commands having no effect after about 2 hours. Display shows F4 or F7. (with circuit diagram extract)
• Vertical striations and shading on left hand side of picture accompanied by smearing. Intermittent loss of line lock.
• Certain channels drop out in UHF range.
• Useful voltages to check on satellite RX board
• Bright raster. Poor vertical linearity. (+ extract of circuit diagram)
• Tuning drift or no signals though the green bar moves. (part of circuit diagram displayed)
• Picture only 3cms high.
• D5770 (ZTK33B) fails repeatedly. No tuning or tuning drifts. (extract of circuit diagram attached)
• "F7" on OSD. No sound. LED flashing. OK after 20 mins. (picture attached)
• Tuning drifts. Poor picture (when cold).
• No regulation. (part of circuit diagram displayed)
• Humming, ticking. (with circuit diagram extract)
• Picture jitters.
• No signal to the collector BUT11AF. (+ extract of circuit diagram)
• Low contrast. (with circuit diagram extract)
• Sizzling/picture distortion.
• Standby LED continuously flashing.
• Tripping with clicking via speaker. (with circuit diagram extract)
• No horizontal deflection. Standby LED flashes .
• No picture. TXT OK .
• Hum in audio. Horizontal lines. (779781 tips)
• Intermittently trips. Picture pulses to low width. Reduced height. Raster flashes.
• No or poor synchronisation.
• Does not go to standby via RC; LED on set changes from green to orange (should be red).
• Blue picture. (picture attached)
• Intermittently F4 appears. Dark picture. (service info for HANSEATIC -779781)
• IC7720 does not function correctly. (extract of circuit diagram attached)
• Popping noise from speakers, only at switch on.
• 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.
• EHT low and line output transformer makes a fizzing noise. (+ extract of circuit diagram)
• Snowy picture. No sound. LED flashes alternately green and yellow. No control via user control and RC. After approx. 5 mins operation, functions ok.
• U743 tuner replacement.
• Addition of fuse 1670.
• To loop the video through not using circuitry on satellite RX.
• No picture. AV OK . (part of circuit diagram displayed)
• If appliance is switched to standby when cold, it starts pumping. Other functions OK.
• The R3661 resistor is in open circuit. (picture attached)
• Displaying error code F7 intermittently. (picture attached)
• Switches off automatically for a short time and restarts with program1. Picture drops out or switches off.
• +95V is incorrect. (picture attached)
• Manufacturing error.
• Incorrect characters on the screen. (service info for HANSEATIC -779781)
• Only one horizontal line at bottom of screen.
• Snowy raster. (part of circuit diagram displayed)
• Picture flares. (+ extract of circuit diagram)
• Lines in light areas and letters. Improves when contrast reduced. (with circuit diagram extract)
• No picture. Blank raster. (part of circuit diagram displayed)
• Light picture content with coloured background.
• No text, front controls perform wrong task. (+ extract of circuit diagram) (779781 tips)
• Intermittently sound mutes and OSG are jumbled. (779781 tips)
• No colour (at start-up). (picture attached)
• When appliance is switched on it jumps to channel 3 then when the appliance is warm it shuts down. (picture attached)
• Only part picture can be seen, sound OK. (part of circuit diagram displayed)
• Fine, dark horizontal lines when warm.
• The BUT11AF is destroyed after some time. (+ extract of circuit diagram)
• Erratic clock.
• Thin horizontal black lines in upper picture area. Error is shock sensitive in the beginning, then becomes permanent.
• F0, UHF and P1 indication after approx 30 mins then no function.
• PSU pulsates.
• Flashover on picture tube print. (picture attached) (service info for HANSEATIC -779781)
• Incorrect OSD characters.
• No OSD. (extract of circuit diagram attached)
• Outlines are distorted in the top part of the picture and intermittently no colour.
• Interference lines when cold but not when warm.
• Poor audio. (part of circuit diagram displayed)
• Tripping (intermittently).
• Horizontally torn picture.
• Low HV. intermittently. (extract of circuit diagram attached) (service info for HANSEATIC -779781)
• 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.
• PSU shutsdown with popping sound. LEDs flashing.
• Intermittent audio. (picture attached)
• Line output transistor 7545 (BUT11AF) fails after a while.
• Line pairing at top half of picture. (extract of circuit diagram attached)
• Cogging down sides of picture. (picture attached)
• Blocked control. Error F7. LED flashing.
• Teletext faults. Characters wrong. (picture attached)
• White screen. (extract of circuit diagram attached)
• Reduced vertical size. (part of circuit diagram displayed)
• No sound. No channels switching. Error code F7 appears on screen (TXT board).
• No or poor operation of RC and front controls. No picture when cold. (extract of circuit diagram attached)
• No RC functions. (part of circuit diagram displayed)
• No TXT. No picture. after a while.
• Black dots in the bright-white spots. (service info for HANSEATIC -779781)
• Tripping (after start-up). (with circuit diagram extract)
• Missing 95V.
• Breakdown of T7625. (+ extract of circuit diagram)
• Protection IC7380 BB panel.
• Distorted picture. when cold.
• "F7" displayed on OSD, LED flashes and user controls inoperative.
• Excessive vertical and horizontal size. (part of circuit diagram displayed)
• No red in the picture with an RGB input.
• No synchronisation (intermittently).
• Searches for channels continuously. (extract of circuit diagram attached) (service info for HANSEATIC -779781)
• No channel storing.
• No red.
• Poor line synchronisation. (+ extract of circuit diagram)
• Fault codes F4 or F7 with no signals and orange LED.
• No picture. No sound. No RC function. LED lights up green.
• Light and dark vertical lines on left of picture. TXT does not function. OK when warm. (with circuit diagram extract)
• Vertical foldover. Flyback lines.
• Pal/Secam chroma identification problem.
• The appliance will not tune stations higher than 55, the tuning varies. (with circuit diagram extract) (779781 HANSEATIC repair tip)
• Loss of sound. STEREO/MONO indication lit.
• Does not switch on when cold. Strange oscillating noise from PSU. Green LED flashes quickly. Picture appears after a few mins but extremely noisy.
• Destroys BUT11 and bridge rectifiers on switch on. (part of circuit diagram displayed)
• Reduced vertical size. Vertical foldover at top. (with circuit diagram extract)
• Blurry picture. Audio OK .
• Stuck on channel 8. No front controls or R/C operations. Standby LED flashing. (+ extract of circuit diagram)
• Picture becomes dark from time to time, cannot be adjusted. (part of circuit diagram displayed)
• Line lock is incorrect.
• In TXT, takes about 60 secs to build up page. Page never quite fills up completely with data, thus looking confusing.
• The remote control and the operation unit shut off after approx.10 min.Later strange symbols appear on the screen. (+ extract of circuit diagram)
• No line oscillation. (779781 tips)
• Tuned stations change constantly in the upper tuning areas VHF (B III) and UHF. (779781 HANSEATIC repair tip)
• No functions. after a few minutes.
• No functions. LED blinks . (with circuit diagram extract)
• No E/W, oscillation wide in narrow field on right side. (779781 tips)
• No picture content for the first ten minutes. White picture with flybacks lines.
• Lines in picture. (+ extract of circuit diagram)
• Does not stop when sweep tuning. Drifts if manually tuned. (with circuit diagram extract)
• How to convert from G90 + SAT RX to standard G90.
• No sound at switch on. Picture is present. "F7" displayed on screen. No RC. Everything OK when warm. (service info for HANSEATIC -779781)
• Dark picture. (with circuit diagram extract)
• Codes F4 or F7 with no signals and LED orange.
• No synchronisation. (with circuit diagram extract)
• Chroma fault in SECAM. (part of circuit diagram displayed)
• Line transformer crackles. (779781 tips)
• Sometimes remains in standby when switched on with the help of mains switch.
• Only noise, otherwise no functions or display.
• Hiccups and returns to channel 1. Unable to reset. (picture attached)
• Reduced horizontal size.
• Error codes. (+ extract of circuit diagram)
• F7 error clears after a few minutes. (picture attached)
• "F7" on OSD. No audio and stuck on channel. OK after 20 mins.
• 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.
• Faulty TXT. (HANSEATIC - 779781 information)
• Over-voltage circuit active. (+ extract of circuit diagram)
• The voltage of +95V line alters. (picture attached)
• Appliance runs perfectly, switches to standby then pumps the PSU.
• Jumps to channel 1 or switches off itself. (+ extract of circuit diagram)
• Faulty OSD.
• Dead. Standby LED flashes .
• Appliance stuck on programme "1". OSD shows F7.
• Dead. (picture attached)
• Blank raster. No sound. No OSD. RC LED does not flash when a command is transmitted. (picture attached)
• 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.
• Purity fault.
• The mains transistor BUT11 permanently blows at switch on. (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. (extract of circuit diagram attached)
• No tuning. No display. No RC functions. (picture attached)
• No adjustment to low volume. (with circuit diagram extract)
• Shuts down (after a few minutes). PSU pulsates.
• Character error. (779781 HANSEATIC repair tip)
• Insufficient contrast. When readjusting, brightness is also adjusted. teletext is O.K. (+ extract of circuit diagram)
• Crackling/bubbling sound from speaker when switched to standby after a short time. (picture attached)
• Light spot after switch off. (picture attached)
• Lines in picture. on the left.
• Black lines in picture, then no picture.
• A production change:
• Not operational. F7 in picture.
• Does not tune optimally. (+ extract of circuit diagram)
• Noise at the edges of the picture.
• Difficult front control operation.
• Dead (intermittently).
• 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.
• No start-up. Green LED flashes .
• No picture. in the centre. (779781 tips)
• Picture is bowing on edges for couple of minutes.
• Memory loss. (picture attached)
• Horizontal jitter. in the centre.
• BUT11AF is defective and is destroyed at each start up. (extract of circuit diagram attached)
• No horizontal synchronisation. in TXT. (part of circuit diagram displayed)
• Chopper transistor (BUT11AF) S/C. (picture attached)
• Video signal and sound are missing, raster is blank. (+ extract of circuit diagram)
• Shuts down. (part of circuit diagram displayed) (779781 HANSEATIC repair tip)
• Distorted picture. OK via SCART .
• After a few hours there is a slight reduction of brightness. When changing channel manually the display reads F4 or F7. (extract of circuit diagram attached)
• Line output transformer information.
• Does not switch to standby.
• Disable hotel mode. (779781 tips)
• Ragged picture. Dim display. (+ extract of circuit diagram)
• LED blinks in STANDBY mode. (with circuit diagram extract) (779781 HANSEATIC repair tip)
• Squealing from PSU. Audio and picture OK . (extract of circuit diagram attached)
• Defective switching transistor in the SOPS supply. (picture attached)
• Stops when warm. Display shows F7.
• Horizontal collapse (intermittently).
• Poor tuning. Search sometimes does not stop. Picture shifted and trembles. (part of circuit diagram displayed)
• Low picture contrast. Cannot be controlled via user control.
• Picture is missing, LED displays F4. (part of circuit diagram displayed)
• No functions. (extract of circuit diagram attached)
• Dead. Power LED lit . (part of circuit diagram displayed)
• Blank raster. TXT OK . (with circuit diagram extract)
• Only programme 6 at switch on. F7 on display. No control. No function of keys or RC. (picture attached)
• No picture. OSD OK . (extract of circuit diagram attached)
• Noise from PSU.
• No function. Rapid loud popping noise with synchronised standby LED flashing.
• Line tearing at vertical lines from top to bottom in test picture. (779781 tip from HANSEATIC)