Pioneer CT-1060W Service Manual page 23

10. ADJUSTMENTS
10.1 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 tape deck into the playback 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 faiis to lie within
300 ~ 500g, replace the pinch pressure spring.
Tension gauge
Pinch roller
Fig. 10-1 Pinch roller pressure adjustment
Reel Base Torque Adjustment
If the measured values lie outside the relevant
ranges, replace the TU (take-up) reel base assembly
and/or supply
reel base
assembly,
TU idler, or
drive arm full assembly.
Table 1
TU reel base
Playback mode 38 — 57g.cm
Supply reel base
75 — 135g.cm
CT-1IO6GOW, CT-S77W
Tape Speed Adjustment
1. Load the STD-301 test tape into the deck I,
and any blank tape into the deck II.
2. Press the SYNCHRO COPY START key and
let the deck warm up for at least ten seconds.
3. Short circuit between the TP16 and TP17
terminals. (double speed playback)
4, Check that the deck I playback frequency is
6000Hz+20Hz. If the frequency lies outside
of this range, adjust V303 to 6000Hz+20Hz.
5. Open circuit between the TP16 and TP17
terminals.
6. Check that the deck I playback signal fre-
quency is 3000Hz+5Hz. If the frequency lies
outside of this range, adjust V301 to 3000Hz
+5Hz.
7. Load the STD-301 test tape into the deck II.
8. Press the deck II PLAY key, and short circuit
between the TP16 and TP17 terminals,
9. Adjust V304 to obtain a double speed play-
back frequency within +10Hz of the adjusted
value in deck I.
10. Open circuit between the TP16 and TP17
terminals.
11. Adjust V302 to obtain a normal speed play-
back frequency within +5Hz of the adjusted
value in deck I.
TP17
TPI6 ~
v301 Vice
303
a V304
Fig. 10-2 Tape speed adjustment
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