Pioneer CT-1270WR Service Manual page 26

C T - 1 2 7 0 W R C B K 3
Deck I
1. Head Azimuth Adjustment
• Turn V R 1 0 2 and V R 2 0 2 to mechanical center positions.
No.
Mode Input signal & test tape
Adjustment location Measuring location Adjustment value Remarks
1
P L A Y Play the 1 0 k H z / - 2 0 d B section
of the STD-331 B test tape.
Head azimuth adjust-
ment screw.
( F W D , R E V ) (See
Fig. 11-6)
L I N E O U T
Maximum playback signal
level.
2
S T O P
Lock the screw with screw lock after completing the adjustment.
2. Playback Frequency Response Check
No.
Mode Input signal & test tape
Adjustment location Measuring location Adjustment value
Remarks
1
P L A Y
STD-331 B
-
L I N E O U T The allowable zone shown in
Fig. 11-7 is to be satisfied.
3. 'layback Level Adjustment
• Thisadjustment determines the D O L B Y NR level, and must be performed with great care.
No.
Mode Input signal & test tape
Adjustment location Measuring location Adjustment value
Remarks
1
P L A Y Play the 315Hz/0dB section
of the STD-331 B test tape.
V R 1 0 1 (Lch)
V R 2 0 1 (Rch)
PB D O L , L (Lch)
PB D O L , R (Rch)
-13.5dBv
4. Playback Time Constant Switching Check
• Put the deck into playback mode with no cassette loaded.
•
Check that the noise level changes at the line playback output terminals when the T A P E S E L E C T O R switch is changed.
Fig. 11-8 Adjustments locations
3 S