Sony TC-PB5 - Adjustments: Motor Voltage, Head Azimuth, and Level; Motor Voltage, Head Azimuth, and Level Calibration; Semiconductor Lead Layout Diagrams

Reel Motor Voltage Adjustment
Procedure:
1. Insert the cassettetape and set in fast-forward mode.
2. Confirm that the reel motor is rotating. Adjust
RV301 so that the voltage at the terminal of
the reel motor becomes the specified value.
Adjustment Value:
TC-PB5
Playback Head Azimuth Adjustment
Procedure:
1. Mode: playback
test tape
P-4-A81
(6.3 kHz, -10 dB)
Turn the adjustment screw for the maximum
output levels. If these levels do not match, turn
the adjustment screw where both of output
levels match together within 0.5 dB.
R-CH
Screw peak
position I
is cis i
3. Phase Check peak
Mode: playback
test tape
P-4-A81 oscilloscope
(6.3 kHz, -10dB)
L-CH
TC-PB5
Playback Level Adjustment
Procedure:
LINE OUT
PHONES
Mode: playback
: MAX
test tape
P-4-L81
(333Hz, OdB)
LINE OUT
Adjustment Value:
LINE OUT level: 0.52 ~ 0.59V
(—3.5 ~ —2.5dB)
Level difference between channels:
less than 0.5dB
Check that the LINE OUT level does not change
in playback mode while changing the mode
from playback to stop several times.
Adjustment Location:
— playback board —
RV101 RV201
(L-CH) (R-CH)
@ Semiconductor Lead Layout
28C1345
2SC2001
on:
2SA1027R
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(Top view)
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(Top view)
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anode
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(Top view) (Bottom view)
PG3432S
long short
anode cathode