Pioneer CT-F10 Servise Manual page 23

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6.2.1 Playback Section
(1) Tape Speed Confirmation
No. Mode Input Signal/Test Tape
1 PLAY
(2) Head Azimuth Confirmation
• 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
1 PLAY
(3) Playback Level Adjustment
• Since this adjustment determines playback DolbyNR level, Perform it carefully.
No. Mode Input Signal/Test Tape
1 PLAY
(Playback: 315 Hz, 0 dB)
(4) Playback Frequency Characteristics Confirmation
No. Mode Input Signal/Test Tape
TE
L 13942296513
1 PLAY
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 a 315Hz (-26dBv)signal to
*
1 the REC IN terminal .
(W147:REC L) (W151: REC R)
Load the STD–633 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 a 315Hz (-10dBv)signal to
1
the REC IN terminal .
*
www
(W147:REC L) (W151: REC R)
• STD–633 test tape and record/
REC =
2
playback the 315Hz signal.
PLAY
.
• DOLBY NR : OFF
*
: In case of adjustment as a single unit, enter the signal at W147(RECL)and W151(RECR) ofMAIN 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)
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Adjustment Points
NCT-111 (3 kHz)
No Adjustment
Adjustment Points
NCT-132X Head azimuth
(10 kHz, –20dB) No adjustment
Adjustment Points
L ch
NCT-132X test tape
R ch
Adjustment Points
NCT-132X test tape
Input Signal/Test Tape
R ch
Input Signal/Test Tape
x ao
y
i R ch
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8
Measurement Points
PB OUT
(PBR:W149)
(MAIN ASSY)
Measurement
Points
PB L cH(W150)
PB R cH(W149)
(MAIN ASSY)
Measurement
Points
VR2301
PB L cH(W150)
PB R cH(W149)
(MAIN ASSY)
VR2302
Measurement
Q Q
3 6 7 1 3
Points
PB L cH(W150)
PB R cH(W149)
(MAIN ASSY)
Measurement
Adjustment Points
Points
PB L cH(W150)
Input signal level
PB R cH(W149)
(MAIN ASSY)
FWD.VR2821 REV.VR2823
L ch
REV.VR2824
FWD.VR2822
Measurement
Adjustment Points
Points
Input signal level
PB L cH(W150)
PB R cH(W149)
u163
VR2401
L ch
(MAIN ASSY)
VR2402
.
2 9 9 4 2 8
Adjustment Value
REV Confirmation
3000 Hz+90Hz
( 3000 Hz + 90Hz )
- 60Hz
FWD / REV
Confirmation
Adjustment
Value
FWD Adjstment
REV Confirmation
–6.0 dBV
( – 6.0 dBv ± 2.0dB )
Adjustment
1 5 0 5 8 2 9 9 4
Value
Check that the frequency
characteristics is within the
range of Fig. 6-2.
Adjustment
Value
–26 dBV
Repeat adjustment until playback level of
the 10kHz signal is within -0.5dB ± 0.5dB
from that of the 315Hz signal.
Adjustment
Value
–10 dBV
m
co
Repeat recording, playback and
adjustment until playback level of the
315Hz signal becomes –10dBV ± 0.5dB.
CT-F10
9 9
Remarks
– 60Hz
Remarks
Remarks
Remarks
2 8 9 9
Remarks
Remarks
23