Sanyo RD 30 - Tape Sensitivity and Response Adjustments; Normal Tape Calibration; Chromium Dioxide Tape Calibration

ELECTRICAL
ADJUSTMENTS
Ccontinuea)
VTVM (Max.)
Dummy Load
14kHz= 1kHz,+1dB
Set the Bias Switch and Equalizer Switch to CrO2.
Alternately record 1kHz and 12.5kHz signals from the
audio signal generator at 5mV (—46dB) on the tape several
times.
for Normal Tape
Set the Bias and the Equalizer Switches to NORM.
Insert a normal tape (Example: TDK AC-511) into the
cassette compartment. Then, adjust the potentiometers by
following the conditions described below and the same
procedure as for the Chromium Dioxide Tape.
* Input Signals. ............0.. 1kHz and 12.5kHz
© A MPUTILOVEl cre weiss Bw Bete bs De es 5mV (—46dB)
* Potentiometers for adjustment
LeftiChannel soiree s oeaeastere Worden Sk P105
Right Channel: ..055 05 a5 haw each die v ean P205
RECORD & PLAYBACK SENSITIVITY ADJUSTMENT
for Chromium Dioxide Tape
LEFT CHANNEL
. Connect an audio signal generator and an attenuator to the
left channel LINE IN, and a VTVM to the left channel LINE
OUT as illustrated. Then, insert a ferrichrome tape (Example:
TDK AC-221) into the cassette compartment and set the
Bias and the Equalizer Switches to CrO2.
. While the recorded signals are being played back, check that
14kHz signal output is identical to 1kHz signal output or
the deviation is +1dB on the VT VM.
LINE IN
If not, adjust the potentiometer (P107) and re-check the RECORD
output again after the recording and playback operations for Audio Signal A L
the signals. Generator
Repeat the above adjustment until the specified output is
obtained.
RIGHT CHANNEL
Connect an audio signal generator and an attenuator to the
right channel LINE IN, and a VTVM to the right channel
LINE OUT. Adjust the potentiometer (P207) for the right
channel by following the same procedure as for the left
channel.
for Ferrichrome Tape
Set the Bias and the Equalizer Switches to FeCr.
Insert a ferrichrome tape (Example: SONY DUAD C-60)
into the cassette compartment. Then, adjust the
potentiometers by following the conditions described below
and the same procedure as for the Chromium Dioxide Tape. x go>
* Input Signals................ 1kHz and 12.5kHz = patil
* Input Level... 0.02000... 02..00.. 5mvV (—46dB) 315mV (—10dB) Dummy Load
* Potentiometers for adjustment
Left Channel. ............2-----20200-- P106
Right Channel ............-----..220--- P206
2. Set the unit in the recording mode with the PAUSE button
down. Then, feed a 1kHz signal from the audio signal
generator at 100mV (—20dB) to the unit and adjust the left
channel Input Level Control until the signal output becomes
315mV (—10dB) on the VTVM.