Panasonic NV-L20B Service Manual

TechInfo Sheet fax: 01344 853689

Audio Visual email: av.technical@mail.panasonic.co.uk

Product Group: VCR Model: NV-L20B Date: 21/10/98 Revision No: 01 Document No: 01 Subject: Common Faults

Common Faults NV-L20/25/28

Dead power supply................................................................... C1109 open circuit - 1uF at 400V

Dead power supply................................................................... D1113 short circuit - MA2200B

D1113 short circuit................................................................... C1114 open circuit - 47uF at 16V

No tuning or RF feed through................................................... Q1002 faulty - 2SD1330

Intermittent systems operation.................................................. X6101 dry joints

Intermitent stops and powers down.......................................... Plug P2001 dry joints

Intermittent stopping................................................................ Reel sensor low output - ON2170

Intermittent capstan problems................................................... Plug P2001 not correctly inserted

Intermittently damages cam and planet gears............................ Clutch tight on capstan rotor - VXP1113

Squeaking between modes........................................................ Capstan pressure pad worn - VXL1873

Audio dub cutting out after 5 mins (L25).................................. Upgrade IC6001 to MN6740VCJK

No video on E to E................................................................... Video input jack switch faulty - VEJ0777

Unable to tune in....................................................................... C706 leaky - 0.1uF

Shading on E to E picture.......................................................... C7678 open circuit - 10uF at 16V

Badly distorted E to E video...................................................... IC3901 faulty - LA7150

Intermittently badly distorted picture on playback & E to E........ RF convertor ENC17952

Picking up Macro vision on playback (L28)................................ Fit 50V 4.7uF across C9568

Remote control inoperative...........................Remove batteries and short battery contacts together briefly

Scanner not reading bar codes.................................................... Remove cap over LED and clean

Panasonic CS U.K. Document No: 01

Model: NV-L20B