Playback Section; Recording Section - Pioneer CT-R5 Service Manual

CT-R5

6.2.1 Playback Section

(1) Tape Speed Confirmation
No. Mode Input Signal/Test Tape
1 PLAY NCT-111 (3 kHz)
(2) Head Azimuth Adjustment
¶ This unit is equipped with auto tape selector.
¶ Do not switch between forward and reverse operation with the screwdriver inserted.
No. Mode Input Signal/Test Tape
NCT–132X test tape
1 PLAY
(Playback: 10 kHz, –20 dB)
(3) Playback Level Adjustment
¶ Since this adjustment determines playback DolbyNR level, Perform it carefully.
No. Mode Input Signal/Test Tape
NCT-132X test tape
1 PLAY
(Playback: 315 Hz, 0 dB)

6.2.2 Recording Section

(1) Recording Bias Adjustment
¶ After the adjustment, caution should be exercised so as not to become under bias by checking the distortion rate.
No. Mode Input Signal/Test Tape
REC/ Input a 315Hz signal to the AUX
1
PAUSE terminal of SX-R9.
Load the STD–632 test tape and
REC =
2 record/playback the 315Hz and
PLAY
10kHz signals. (see the Note below)
Note: Set the 10kHz input signal level to the same value as the 315Hz input signal level of step 1.
(2) Recording Level Adjustment
No. Mode Input Signal/Test Tape
REC/ Input a 315Hz signal to the AUX
1
PAUSE terminal of SX-R9.
REC =
STD–632 test tape and record/
2
playback the 315Hz signal.
PLAY
*
: In case of adjustment as a single unit, enter the signal at 15P(RECR) and 19P(RECL) of CN101(CONNECT ASSY). At this time, connect
an output buffer amplifier to the oscillator, and then connect a series resistor (180 Ω) after the impedance has become sufficiently low. (For
MPX filter impedance matching)
28
Adjustment Points
VR (Mechanism Unit)
(Refer to Fig. 6–5)
Adjustment Points
Head azimuth
adjustment Screw
(Fig. 6–5)
Adjustment Points
VR201
L ch
VR202
R ch
Adjustment Points
∗
Input signal level
VR331
L ch
VR332
R ch
Adjustment Points
∗
Input signal level
VR301
L ch
VR302
R ch
Measurement Points Adjustment Value
TP R (W162)
3000 Hz
( MAIN ASSY)
Measurement Adjustment
Points Value
TP L (W161)
Max. Playback
TP R (W162)
signal level
( MAIN ASSY)
Measurement Adjustment
Points Value
TP L (W161)
TP R (W162)
–4.2 dBV
( MAIN ASSY)
Measurement
Adjustment
Points
Value
–24.2 dBV
TP L (W161)
TP R (W162)
Repeat adjustment until playback level of
( MAIN ASSY)
the 10kHz signal is within 0 ±0.5dB from
that of the 315Hz signal.
Measurement Adjustment
Points Value
–8.2 dBV
TP L (W161)
TP R (W162)
Repeat recording, playback and
( MAIN ASSY)
adjustment until playback level of the
315Hz signal becomes –8.2dBV±0.5dB.
Remarks
Adjustment only when
+90
Hz
–60
outside the standard
Remarks
After adjustment, apply silicon
bond to the head azimuth
adjustment screw.
Remarks
Remarks
Remarks