Onkyo T 9 Service Manual

Page 2

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QUARTZ LOCKED CIRCUIT To make possible accurate recording level settings, the

. t T-O is equipped with a signal generator which produces a
The IF component and the quartz .oscllatlon gm at 440 Hz signal corresponding to a 50 % modulation level.
107 MHZ 0f 0704 are detected With the cycle of '19 If FM recording levels are set with reference to this signal,
kHz. and the varience of the detected output is amplified perfect recordings will be obtained the first time, every
with the DC voltage being imparted to the variable 021- time.
pacitor diode at the front end. In this way, the local 1' Place the REC Check switch in the On position,
oscillation frequency is regulated. 2. Set recording levels using tape deck input level con-
ACCUTOUCH CONTROL TUNING SENSOR trols so that VU meter readings are as follows:

Open Reel ......... 0 to +2 dB

When the tuning knob is touched, a special sensor releases Cassette """"""" 2 dB
the quartz oscillator lock of permit tuning to another 3_ Turn Off REC Check.
station. Releasing the knob automatically reactivates the 4_ The output level knob should not be moved after re-
quartz lock, to maintain precise tuning at all times. If cording levels are set. It is recommended that this
you {all to tune "1 the Signal sharply, the quartz l°°k control not be moved at all, once tuner output level
circuit with automatically compensate to achieve optimum has been adjusted to match other components in the
tuning. system.

Sensor Switch

Set sensor switch at low intially. Switch to normal or DE'EMPHASIS SWITCH

high if the TUNED lamp doesnt instantly turn Off when Use this switch to set de-ernphasis according to geographic
you touch the tuning knob. area (USA 75 usec, Europe 50 usec), and for Dolby

RECORDING CHECK CALIBRATION 0'de (25 ml

Successful FM recording depends on correctly setting the
recording level, as well' as optimum antenna placement.