Recording Level Adjustment - Pioneer CT-730 Service Manual

4 d 8
I
_ f
I
I
6 d B
I
._t
l X r
Tast tape
Tape selector
DOLBY NR switch . .
12.2.7 Recording Level Adjustment
Settings
AC mV meter
Connect to TPl (L ch) and
TP2 (R ch)
Input signal
333H2, - 10dBv (B16mV)
to LINE INPUT terminals
Test tape
STD-608A (STD-603,
sTD-604)
Tape selector NORM (CrO, , METAL)
Mode
Record
STD.6O3
CrOz
ON
r 2 t l
Tast tape
STD-604
Tape selector
METAL
D O L B Y N R s w i t c h . .
. O F F
o
o
I N P U T V
V R | 0 3 ( L c h ) , V R 2 0 3 ( R c h
)
( D D o L B Y N R s w r r c h
oN
------\
O Tape selector
---->
CrO.
/--
O M E T A L
l : j i h : 1 4 /
e o
o o
5 . zdBv ( g9mv
)
5 . z d B v + l . s d B v
eecneao (
{J
333n2
l 0 r t B r
3 r 6 n V
Tast tape
Tape selector
DOLBY NR switch . .
F i g. 12- 15 R ec ording l evel adj ust m ent
Procedure
Adjust the INPUT level control so that the
meter reads - 5.2dBv (549mV).
Switch the DOLBY NR switch ON.
Record the 333H2, - 10dBv signal on the
STD-608A test tape. Then adjust VR103
(L ch) and VR203 (R ch) so that the meter
reads of - 5.4dBv (549mV) when the recorded
signal is played back.
Switch the tape selector to the CrO, position
and repeat step 3 using the STD-603 test
tape. The playback output level should lie
within - 5.2dBvt 1.5dB.
Then switch to the METAL position and repeat
using the STD -604 test tape. The playback out-
put level should again lie within the - 5.2dBv
t 1.5dBv range.
6 . 5 t t { . l 2 l H z
STD-604
METAL
ON
1 .
2 .
3 .
Fig. 12-14 Frequency response
4 .
5 .
4 3