Panasonic NV-G21B Service Manual

TechInfo Sheet fax: [phone]

Audio Visual email: [e-mail]

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