Panasonic NV-G21B Service Manual
TechInfo Sheet fax: 01344 853689
Audio Visual email: av.technical@mail.panasonic.co.uk
Product Group: VCR Model: NV-G21B
Date: 21/10/98 Revision No: 01 Document No: 01
Subject: Common Faults
Common Faults NV-G21/25
Timer display cutting out......................................................... C1018 open circuit 47uF at 50V
Off tune as tape is inserted....................................................... C1018 open circuit 47uF at 50V
Patterning & no colour on playback......................................... C1023 open circuit 1000uF at 10V
Cylinder motor twitching and cutting out................................. C1023 open circuit 1000uF at 10V
Intermittently keeps blowing main fuse.................................... D1002 leaky ERA22-08
Power LED stays on after switch off...............Print open circuit between Pin 2 of IC6001 & base of QR6014
Patterning on E to E................................................................ C1019 open circuit 1000uF at 25V
White playback patterning varying with tracking...................... C1022 open circuit 47uF at 50V
No sound and counter inoperative on playback........................ C204, C240 open circuit 10uF at 25V
Damaging tapes intermittently after eject................................. Play arm worn (Item 147) VXL1490
Damaging top edge of tape...................................................... P5 arm distorted (Item 53) VXL1485
Damaging bottom edge of tape................................................ Worn pressure roller (Item 45) VXL1481
Intermittent cylinder servo ‘twitching’..................................... Impedance roller sticking
Keeps going out of alignment between cassette housing and main deck
...............................................................................Right side housing broken or worn (Item 219) VXA2677
Rattling noises and erratic mechanism operation...............Intermediate gear damaged (Item 146) VDG0336
No video on E to E (sound all right)......................................... Video input socket switch faulty
Noisy and distorted sound on playback..................................... R4021 open circuit 47 ohms.
Remove playback attenuation of aerial signal............................ Disconnect Pin 3 (BS1) on RF convertor
Mechanism keeps jamming....................................................... Stiff rotor unit (Item 133)
Panasonic CS U.K. Document No: 01
Model: NV-G21B
1
Loading...