Mechanical Adjustments; Pinch Roller Pressure Adjustment; Tape Speed Adjustment; Reel Base Torque Adjustment - Pioneer CT-5 Service Manual

1 1 . M ECHANICAL ADJUSTMENTS
Prior to adiustment
Clean the both reel base, the capstan and the
pinch roller with an alcohol moistened swab'
1 1 . 1 P I N C H R O L L E R P R E S S U R E A D J U S T -
M E N T
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 fails to lie within
3509
550g, replace the pinch pressure
spnng.
Capstan
P i n c h r o l l e r a r m
r r n c n r o l l e r p r e s s u r e s p n n g
( P a r t N o . R B H - 7 4 2 )
F i g . 1 1 - 1 P i n c h r o l l e r p r e s s u r e a d j u s t m e n t
1 1 . 2 R E E L B A S E T O R O U E A D J U S T M E N T
Measure the torque with the torque meter
during playback, fast forward (FF) and rewind
(REW) modes. The measured values shottld normal-
ly lie within
the allowable
ranges listed in the
t a b l e 1 .
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
1 1 . 3 T A P E S P E E D A D J U S T
1. Connect the frequencY
OL/TPLIT terminals.
2. Play back the 3kHz Portion
bhe STD-301
test tape. At the beginni
frequency
-
3 0 1 0 H 2
should be lie within the
range, and may be adj
turning the
apstan motor
semi-fixed resistor located in
adjustment hole as shown in
rL-z.
Tape speed is increased bY turning the
xed resistot clock'
wise, and decreased bY turntng coun
increased
Tape speed decreased
screwd ri ver
Fig. 11-2 Tape speed
1 1 . 4 R E C D E T E C T O R S W I U S T M E N T
Adjust the tange (f)
sho Fig. 11-3 by
en a cassetæ
to the LINE
into the
n a cassette
itch is OFF.
detector lever
Tension gauge
(Part No. CGK-047)
the arrow to a position wh
with an erase prevention detec
holder, the lever switch is ON,
without the detector is loaded.
Side plate L assembly
I
Lever switch
(REC detector
switch )
F i g . 1 1 - 3 R E C d e t e c t o r s w i
TU reel base Supply reel base
P l a y b a c k m o d e
35 - 55g.cm
2 - 5 9 c m
F F m o d e
7 5 - 1 1 O g . c m
2 - S g . c m
R E W m o d e
* 2 - S g . c m
7 5 - 1 1 o g . c m
* Do notes back tension torque