Tape Deck Section - Pioneer RX-1180 Service Manual

9.1 TAPE DECK SECTION
Tape speed adjustment
1. Connect the frequency counter to the TPil
terminal (Dolby TP: L-ch) on the complex
assembly A.
2. Turn the tape switch on.
3. Mount the test tape STD-301 onto deck I.
4. Short-circuit between terminals TP9 and TP10
on the complex assembly A and put the deck I
into play mode.
6. Release the short-circuit between terminals
TPS and TP1O.
7. Put the deck I into play mode and adjust
with VR402 so that the playback signal
frequency becomes 3000Hz *33 Hz.
to confirm the following items.
5. Prepare the following measuring instruments.
AC millivoltmeter,
low frequency oscillatore,
attenuator, and oscilloscope.
Fig.9-8 Test tape STD-331B
ll.
12.
13.
14.
RX-1180, RX-1190
(STD-301 is play backed in double speed.)
Adjust with VR403 so that the playback signal
frequency of deck I becomes 6000Hz *{f} Hz.
Release
the short-circuit between
terminals
TP9 and TP1O.
aging of the set for several minutes.
Especially prior to entering the adjustment of
the recording and playback frequency
characteristics, aging should be performed in
REC/PLAY mode for 3 to 5 minutes.
. The adjustment should be performed in
accordance with the adjustment order. If the
order is not kept it may cause the failure of
the complete adjustment which induces the
inferior function of the unit.
Deck |
Ls
2.
Head azimuth adjustment
Playback level adjustment
Deck Il
1.
Be
. Adjustment of recording and playback frequency
Head azimuth adjustment
Playback level adjustment
characteristics
. Adjustment of recording level
OdB . 315Hz. 16O0nwb/m
4g