NV230B / PANASONIC [Video recorder - VHS HiFi]

• Appliance does not switch from EE to playback. (+ extract of circuit diagram)
• Muting frequency adjustment.
• Sometimes play function fails.
• No function. The VTR switch stops functioning after approx. 5 seconds.
• Regulated +5V adjustment.
• Occasionally, no PB function.
• Artificial v-sync adjustment.
• The cassette is accepted and loaded until stop position, but then part of the tape is immediately unloaded. The appliance switches off and locks.
• AFC adjustment.
• Sometimes the capstan motor does not start.
• In special function mode, the picture moves forwards very quickly during forwards and backwards picture search.
• In special functions - CUE or REV - picture runs forward/backwards at too high speed. (part of circuit diagram displayed)
• Capstan motor sometimes does not start or doesn't ot wind up. Sound is missing. (part of circuit diagram displayed)
• Tape end switch off after rewinding only works sometimes.
• Audio bias level adjustment.
• PG shifter adjustment.
• The display is dark, all other function are ok.
• With extra functions CUE and REV search picture runs forward/backwards very quickly. (part of circuit diagram displayed)
• No colour during playback or record. EE is ok. (part of circuit diagram displayed) (NV230B tip from PANASONIC)
• Sometimes no playback function.
• The appliance does not function, only the display.
• Audio PB level adjustment.
• Incorrect functions of transport section.
• In EE mode and HF recording picture and sound are distorted. (+ extract of circuit diagram)
• Occasionally the capstan does not synchronise (runs too fast/slow or oscillates). (picture attached)
• Head amp frequency response adjustment. (picture attached)
• During special function (forward and reverse search) the picture runs too fast. (extract of circuit diagram attached)
• Luminance REC current adjustment.
• Timer reset adjustment.
• No sound during E/E operation. (extract of circuit diagram attached)
• The tuning goes wrong and interference lines cover a snowy picture.
• During EE the sound is missing but it is present during PB and AV. (with circuit diagram extract)
• During playback oscillations can be heard. (extract of circuit diagram attached) (PANASONIC - NV230B information)
• During PB howling can be heard permanently. (+ extract of circuit diagram)
• The display is dark. All other functions are correct.
• PB chroma level adjustment.
• No EE picture or programme display. Playback OK. (picture attached)
• No functions. (part of circuit diagram displayed) (NV230B tips)
• Tuning reception is not possible, no programme indication present in the display. (with circuit diagram extract) (service info for PANASONIC -NV230B)
• The loading motor over runs and will not start playing.
• Confirmation of video level and burst level adjustment.
• Tracking fix adjustment. (NV230B tips)
• Black picture during playback. EE is correct.
• During recording the appliance switches occasionally to stop.
• The ACT does not read the code properly.
• Capstan sometimes does not synchronise (runs too slowly/quickly or wobbles).
• Constant droning audible during playback.
• The picture is dark during playback, EE is O.K. (picture attached)