Adjustments; Dummy Play Mode Setting; Stylus Lowering Position Adjustment; Adjustment Of Stylus Lowering Position Between Tracks - Pioneer PL-88F Service Manual

9. ADJUSTMENTS
Dummy Play Mode Setting
The PL-88F can be set to a dummy play mode
(in "loading out" mode) by the following method.
L. Remove the bonnet, and set to "loading out',
mode.
2. Switch the power off.
3. Disconnect the CN3 connector on the control
ass'y, and short pin (1) to pin (2).
4. Then switch the power on, thereby putting the
turntable into play mode.
Notes:
1. When using this setting (bonnet remoued, attd, loding
out mode) for track selection operations and adjust-
ments, mahe sure that the toneann cartridge section is
protected from extraneous lEht.
2. When cheching add.ress-related, operations (including
operatione during track selection snd. play),
do not
manipulate the tonearm by hand. If the tonearm has to
be operated,, use the operation heys,
3. Do not operate the OPEN/CLOSE key.
4. Always make sure that the power is off when connect-
ing or disconnecting the connectors.
Adjustments
Different methods af,e usd to adjust the stylus
lowering position for track 1 and the other tracks
for automatic play operation in the PL-88F. The
lowering position for track 1 is adjusted according
to "Stylus Lowering Position Adjustment", while
the lowering position for other tracks is adjusted
according to
"Adjustment
of Stylus Lowering
Position between Tracks".
9.1 STYLUS LOWERING POSITION ADJUST-
M E NT
1. Press the OPEN/CLOSE key, pull the slide base
out forward, place a 30cm record on the turn-
table platter, and set the correct rpm by the
speed selector.
2. Press the START key to start play. Check the
direction and degree of stylus displacement at
this time. (Estimate the approximate distance in
mm that the stylus lands from the lead-in groove ).
Adjustment hole
" ,a(r"y2se
plate)
Screwdriver
,/
urntable
3. Depending on the direction and degree of dis-
placement, adjust the adjustment screw indicated
in Flg. 9.1 with a small screwdriver.
* T\:rn the screw clockwise (a.s seen from above) if
the stylus lowers outsile the lead-in groove.
* Turn the screw counter clockwise (as seen from
above) if the stylus lowers iruide the lead-in
gxoove.
* One half turn of the screw corresponds to a shift
of about 9mm in the lowering position.
4. When using the PLS-2001S test record, adjust
the screw to obtain a count in the 305 to 317
range for lowering onto a 30cm record. And if
the GGF-021 test record is used, adjust to a
count between 6 and 30 for a 30cm record.
Notes:
* R e mo ual o f t he b o nne t simp lifie s adj ust m e nt o perat io ns.
In this ca*, ad.juetments can be performed. from the
top of the escutcheon couer,
* Do not incline the turntable ouer too far, nor apply
excessiue pressure to the d,justrnent screw during the
djustment operation.
9.2 ADJUSTMENT OF
STYLUS LOWERING
POSITION BETWEEN TRACKS
Use this adjustment method when the stylus
fails to lower correctly into position between tracks
during normal programmed play (when the sensi-
tivity switch is in the NORM position and an
ordinary record is being usd). This position
should also be adjusted after stylus replacements.
1. Press the OPEN/CLOSE key, pull the slide base
out forwards, place a 30cm record on the tr:rn-
table platter, and set the correct rpm by the
speed selector.
2. Press the START key and proceed in progmmm-
ed play mode (excluding the first track from the
program). Estimate the direction and degree of
displacement in the lowering position at this time.
3. Press the OPEN/CLOSE key and pull the slide
base out. The press the manual play switch and
move the tonearm forward.
Fig.9.2 Adjustment of Stylus Lowering Position
Between Tracks
Fig. 9.1 Stylus Lowering Position Adiustment