Pioneer CT-S670D Service Manual page 31

PLAY BACK
250
3dB
6.2.1 Playback Section
(1) Head Azimuth Adjustment
Turn VR101 and VR102 to mechanical center position.
No. Mode Input Signal / Test Tape
Play the 10 kHz/–20 dB section
1 PLAY
of STD–331E test tape
(2) Playback Level Adjustment
This adjustment determines the DOLBY NR level, and must be performed with great care.
No. Mode Input Signal / Test Tape
Play the 315 Hz/ 0 dB section of
1
PLAY
STD–331E test tape
6.2.2 Recording Section
(1) Bias Oscillation Frequency Adjustment
No. Mode Input Signal / Test Tape
Load the STD–611 test tape with
1 REC
no input signal.
RECORDING
12.5k
10k
3dB 4dB
315 Hz = 0 dB
Fig. 6–2 Frequency Response Zone
Adjustment Measurement
Location Location
Head azimuth
LINE OUT
adjustment screw
(L/R ch)
(Fig. 6–3)
Adjustment Measurement
Location
VR101
L ch
VR102
R ch
Adjustment Measurement
Location Location
L401 TP11
250 10k
3dB 3dB
Adjustment
Value
Maximum playback
signal level
Head Azimuth Adjustment Screw
Fig. 6–3 Head Azimuth Adjustment
Adjustment
Location Value
TP3 (L ch)
–6.7 dBV
TP4 (R ch)
(MAIN Unit)
Adjustment
Value
160 kHz ± 1 kHz
CT-S670D
12.5k
5dB
315 Hz = 0 dB
Remarks
Lock the screw with silicon
bond after completing
adjustment.
Remarks
Remarks
31