Pioneer DC-221Z Service Manual page 27

12. ADJUSTMENTS
12-1. MECHANICAL ADJUSTMENTS
Prior to Adjustment
Clean the both reel base, the capstan and the pinch roller
with an alcohol moistened swab.
Pinch Roller Pressure Adjustment
1. Put the deck in to the play back mode.
2. Gently push against the pinch roller arm with the
tension gauge and separate the pinch roller slightly
from the capstan.
3. Then the pinch roller back onto the capstan, and
read the value when the pinch roller starts to rotate. If
the reading fails to lie within 300 — 500g, replace the
pinch roller pressure spring.
Tension gauge
DC-221 2/2202
Reel Base Torque Check
Measure the torque with the torque meter during
playback, fast forward (FF) and rewind (REW) modes.
The measured values should normally lie within the
allowable ranges listed in the table 1.
If the measured values lie outside the relevant ranges,
replace the T reel assembly, and/or S reel assembly or P
idler assembly.
Table 1
T reel base (R side)|S reel base (L side)
PLAY mode}
35g-cm — 70g-cm|*lg-cm — 5g-cm
FF mode
REW mode
*back-tension torque
70g-cm — 140g-cm] *lg-cm — 5g-cm
*1o-cm — 5g-cm | 70g-cm — 140g-cm
Cr, n>
c=) LAS
Pinch roller
Fig. 12-1 Pressure adjustment of pinch roller
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