Pioneer CT-5 Service Manual page 37

Procedure
1. Adjust the INPUT level control so that the
AC mV meter reads - 27dBv (44.6 mV).
2. Record the 333H2 and 6.3kHz signals onto the
STD-608A. Playback the tape and adjust the
VR103 (L ch) and VR203 (R ch) so that the
difference between two is +0.5d810.sdB.
12.6 RECORD LEVEL ADJUSTMENT
Since this adjustment determines the DOLBY NR level
during recording, it should be performed precisely.
Setting
3. Record the 333H2 signal on
Play back the tape and adjust
and VR202 (R ch) so that
reads -5.2dBv (0.54V).
Using STD-603 with DOLBY NR ON (
Record the 333H2 sigrral
Play back the tape and
meter reads -5.2dBv (0.55V)
Using STD-6O8A toith DOLBY NrB ON type)
f3f,Hz
Using STD-6OS with DOLBY NR OFF
r
4 .
5 .
Record the 333H2 signal o
PIay back the tape and chech
meter reads -5.2dBv (0.55V)
4 d 8
6 3 x r
3 3 3 e
STD.6O8A.
R 1 0 2 ( L c h )
C mV meter
e STD-603.
the AC mV
e STD-604.
the AC mV
B .
Mode .
Test Tape
AC mV meter
Input Signal
Record
STD-608A,
STD-603,
STD-604
TPz
(L ch) and "1P2
(R ch) of the DOLBY
assembly
333H2, -1OdBv (316mV)
to LINE INPUT
Procedure
1. Set the TAPE SELECTOR to the NORM
position.
2. Adjust the INPUT level control so that the
AC mV meter reads - 5.2dBv (0.55V).
Frequency Response
Using STD-341A with DOLBY NR OFF
Howeuer, the right channel is compensated by -ldB at 63H2,
and -0.5d8 at 125H2 because of the insulation effect.
63Hz
25o1z
333H2 1 k Hz
Overall Frequency Response
Using STD-608A with DOLBY NR OFF
2XHr
3 3 3 H r