3743 / NIKKAI [TV]

• Resistor R801 blows at switch on.
• Obvious arcing noise from speaker.
• Vertical foldover at top. Vertical collapse. at bottom. (3743 tip from NIKKAI)
• Stuck in standby.
• CRT base, auto greyscale.
• Dead. in shutdown
• Dead. F802 blown
• Reduced vertical size. (service info for NIKKAI -3743)
• Black lines in picture.
• HT high.
• R809 (0.47R) blown.
• One colour is excessive.
• Display locked.
• Video, audio I.F.
• Line pairing at top. Linearity stretched. (3743 tips)
• Excessive brightness.
• Enter service mode.
• Shows time-out clock. Doesn't stop search tuning.
• Tripping.
• HT incorrect. (3743 NIKKAI repair tip)
• Goes back to standby, after approx 5 secs, LED turns green and goes out slowly.
• Low colour saturation level.
• Display shows all channels locked.
• First anode supply low.
• No video. Stuck in AV mode. OSD OK.
• Vertical foldover on bottom.
• No or poor synchronisation.
• Flyback lines. (service info for NIKKAI -3743)
• Erratic operation. Intermittently switches to standby. Corrupt OSD.
• Switches to standby. at start-up. Motorboating noise from speakers. intermittently. LED blinks .
• Reduced vertical size at top.
• Low pulsing power.
• No picture (after warm-up).
• Vertical foldover at top.
• Does not come out of AV.
• Severe line tearing. Ragged verticals.
• No menu functions.
• PSU pulsates.
• Disable electronic combination lock.
• Grainy picture.
• Picture shift upward. Linearity no change.
• Switching transistor (BUZ77B), R809 and TDA4605 become defective immediately after switch on.
• No picture. after a few hours.
• Blank screen (intermittently).
• Customer has forgotten PIN code and Install menu is locked.
• No RC functions. Muted audio.
• No menu functions.
• Snow in picture.
• Timeout clock search stops.
• Reduced horizontal size. at top.
• PSU MOSFET blown.
• Low level mono sound. Nicam OK.
• Bright coloured raster, one colour.
• Reduced vertical size at bottom. (3743 tip from NIKKAI)
• One colour missing.
• Reduced horizontal size. at bottom.
• HT value.
• Audio stages.
• Excessive red.
• Distorted audio.
• Excessive green. (3743 NIKKAI repair tip)
• Reduced vertical deflection. at bottom.
• Switches on for a short time, then switches to standby. LED lights red. After restart, LED goes out completely. (NIKKAI - 3743 information)
• Dead or intermittently dead. (NIKKAI - 3743 information)
• Slow tripping without HT, (3743 tip from NIKKAI)
• Picture shifted vertically. at top.
• Failure of FET, TDA4605.
• Intermittent audio.
• No functions. No LED lit. (picture attached)
• Video & audio inop.
• Bright screen w/retrace lines
• PSU doesn't function.
• Lines in picture.
• Vertical compression in upper 1/2 of pix
• No blue.
• Low output.
• Vertical short at top & retrace lines
• One colour missing, after CRT flashover.
• Field collapse. 1" of severely distorted field scan when setting of first anode control is increased.
• No channel storing.
• Mains transformer makes noises.
• Enable child lock.
• EHT flashovers at output transformer.
• Width narrow. pulled in on sides (3743 tips)
• Goes to standby after a short period.
• No audio. Pulsing in speaker.
• Nicam and signal conditioning chips. (NIKKAI - 3743 information)
• Vertical collapse.
• Field collapse. 1" of scan shifted upwards.
• No vertical deflection.
• Disable child lock.
• Reduced vertical and horizontal size.
• Video blanks out. Audio OK.
• Vertical jitter.
• Intermittent or no colour.
• Slow tripping with HT.
• Transistor Q801 is S/C. IC801 fails.
• No line drive.
• No NICAM channel.
• Tuning locks then shutsdown.
• Not storing channels or analog levels, does store on channel 1 but all data is in other locations also. No TXT or NICAM.
• No tuning. (3743 tips)
• One OSD colour missing, after CRT flash over.
• No green.
• No picture. Audio and OSD OK .
• No picture. No OSD.
• Volume always on full.
• Vertical collapse. at top.
• Goes to standby when tuning.
• No raster, power supply tripping maybe motorboating in speaker.
• No HV.
• No RC functions. Goes to standby when volume up or down used.
• No colour.
• No start-up.
• Too much of one colour.
• Excessive blue.
• Dead. Standby LED lit .
• No TXT. (3743 tips)
• Trips (after a while).
• Display show locked. When unlocking, lock can change, when addressing. Not toggling. (3743 NIKKAI repair tip)
• Vertical size varies.
• Reduced vertical deflection.
• Smeary or even completely blacked out picture occasionally.
• Apparent barking noise from speaker.
• Visible horizontal lines on still picture. (3743 NIKKAI repair tip)
• Vertical fault. on upper half screen.
• No audio.
• Does not stop search tuning. Shows time-out clock.
• Switches to standby.
• No red.
• Low or varying brightness.
• Switches to standby (intermittently).
• Dead.
• Streaky picture, dark on left and bright on right.
• Does not stop on sweep tune.
• No picture.
• Microcontroller.
• Frame severely cramped. Bright foldover in centre with edges curved from horizontal.
• Intermittently dead.
• Black lines on picture. Extremely noisy field drive.