Panasonic NV-F70B Service Manual

TechInfo Sheet fax: 01344 853689

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

Product Group: VCR Model: NV-F70B Date: 22/10/98 Revision No: 01 Document No: 01 Subject: Common Faults

NV-J30/35/F65/F70 Common Faults

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

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

Dead power supply.................................................................... D1110 leaky - MA185

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

Capstan speed erratic................................................................. C1122 open circuit - 330uF at 10v

Capstan speed erratic.................................................................Adjust FG head spacing to capstan motor

Intermittent capstan servo problems........................................... P2001 not inserted fully

Mechanism solenoid chatters and cuts out.................................. R6022 dry joints

No cylinder drive...............................................................C2206 or C2205 or C2204 faulty - 0.1uF at 50v

Intermittent no video head output............................................... Dry joint on head connection pillar

No operation (J35)..................................................................... IC6801 faulty - MN15522VMS

Unable to find any UHF stations................................................. IC7502 faulty - MN12C261D

No RF feed through or tuner operation....................................... Q1102 faulty - 2SD1330

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

Shading on E to E picture........................................................... C7678 faulty - 10uF 16v

No E to E picture (F65).............................................................. Switched to LP mode

Sound distant and echoing (F65 & F70)...................................... AUDIO MIX switched on

Distorted E to E & playback picture........................................... RF convertor faulty - ENV17972A

Remote controller/scanner inoperative........................................ Short battery contacts together briefly

Panasonic CS U.K. Document No: 01

Model: NV-F70B