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TechInfo Sheet
Audio Visual
Product Group: VCR Date: 17/05/99 Subject: Common Faults Model: NV-F55B Revision No: 01
fax: 01344 853689 email: [email protected]
Document No: 03
NVJ40/42/45/47/F55/F77 COMMON FAULTS Dead power-supply............................................................................. Poor video playback from cold............................................................. C1110 faulty - 1uF at 400v C1127 faulty - 330uF at 10v
Power-supply whistling in standby...................................... add 0.01uF capacitor across Pins 3 & 4 of Q1103 Dead power-supply (F55).................................................................... Cutting-out intermittently from play or record..................................... Sticking between modes and powering down...................................... No frame sync on E-to-E.................................................................... No tuning or tuning varies.................................................................. No sound on E-to-E and tuning does not stop.................................... Bad patterning while recording........................................................... Bad patterning on E-to-E................................................................... Sound on vision patterning................................................................. broken earthing print to IC1113 faulty reel sensors - ON2170 dry joints on mechanism solenoid C315 faulty - 4.7uF non-polarised C7666 leaky - 0.01uF at 50v IC7651 faulty - AN5421 C831 faulty - 4.7uF at 50v C318 faulty - 100uF at 6v C313 faulty - 22uF at 6v
No E-to-E picture........................................................................ IC302 faulty - VEFH14D or VEFH14G No E-to-E picture or VU display....................................................... IC7001 faulty - M66006FP
No colour on playback or record................................................. IC302 faulty - VEFH14D or VEFH14G No colour on record and servo hunting (J45/J47/F55/F77)............... NTSC 4.43 switch on
Capstan motor goes high speed....................................................... L2001 open circuit to capstan stator Colour noise at insert edit (F77)............................. missing link between L503 & junction of R518/520 Powers off when tape is inserted................................................... right side cassette housing worn or broken
Panasonic CS U.K.
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Document No: 03 Model: NV-F55B