Panasonic Technics RS-B11W Instrucciones página 28

ells MILITARY MARKET KDZ AND PSDG-BRANCHES
es Sis 30.4.1995 — re/pr
SUBJECT TEXT
DOLBY FREQUENCY Symptom
CHARACTERISTIC When recorded and played in metal tape position, the
frequency characteristic worsens.
WORSENING (Lowered 3 - 5 dB in medium frequency range)
only with Dolby IN.
RS-BL1W
Bias leak voltage is applied to the Dolby circuit causing
faulty operation of the circuit.
* Bias leak is significant in metal position because of
high bias oscillation voltage.
The above-mentioned symptom appears when bias leak of
LINE OUT is about 1.7 mV.
Remedy
Improvement of lead wire arrangement
Bias leak increases as the parallel cable from INPUT
VR comes close to the rec/playback head connector of
main P.C.B.