NAD 6220 - Page 4

ALIGNMENT METHOD
IMPORTANT
The tape path (heads, tape guides, capstan, pinch roller) should be cleaned and degaussed before alignment.
This tape recorder is designed to work well with a variety of tapes, however, maximum performance will be obtained with
recommended tapes or similar.
Recommended tapes. for North America for Europe -DIN
Type | / Normal Maxell UDS-| Maxell UD-I|, BASF TP18 No R723 DG
Type Il / CrO Maxell UDS-1] Maxell UD-!II, BASF TP18 No S4592A
All adjustments done with Dolby NR Off and MPX filter (on back panel) Off.
Dolby NR Level (200 nWb/m) = 245 mV on test points TP 11/12; approximately 530 mV at output.
_TAPE TYPE _ __CONNECTION _
ase INPUT SEL. MODE OUTPUT MONITOR aoteasd ates ila
MTT-111 Play Line out 3000Hz £1%
MTT-211 Counter/W+F 3150Hz :
AZIMUTH
___Lineout Maximum and Seal screw afterwards.
| Normal | _VTVM/Scope_ Use lock paint, not glue.
PLAYBACK LEVEL
TP 11/12 (L/R) | SVR 101 (L)
Ce MTT-150 Normal | ~ VTVM/Scope SVR 102 (R} 245mV DOLBY Level
LEVEL METERS AND OUTPUT LEVEL
Line out SVR 201 (L)
pa Mae | Normal | VTVM/Scope SVR 202 (R)
BIAS TRAP
TP 15/16 (L/R) | £303 (L) i. Less than 15 mV RMS
eespite ar) VivM/Scope | L304 (R) laa No audio input.
RECORD LEVEL
Type |
TOLERANCE
| NOTE
Hole in motor rear
MTT-255C
O0dB LED
just lights up
Note: output level should
be near 530mV
; Record levels fully
__Line
out
_
Generator
output
|
—20
48
from
level
|
clockwise.
Line
in
400Hz
Normal
VTVM/Scope
noted
in
step
4
Output
level
near
50mV.
Rewind and __Lineout SVR 301 (L)
Play
back
|
Normal
|
~—s«
VTVM/Scope
SVR
302
(R)
SHE!
as.
+0.5
dB
REPEAT UNTIL SAME RECORD AND PLAY BACK LEVEL
BIAS ADJUST NORMAL
Line in 400 Hz Generator output Same as6 A
and 12 kHz VTVM/Scope
Rewind and Line out SVR 501 {L)
+t
Play
back
|
Normal
“VTVM/Scope
_
SVR
502
(R)
Same
as6
A
0.5
dB
REPEAT UNTIL SAME ae CORD AND PLAY BACK LEVEL
BIAS ADJUST CrO,
Line in 400 Hz Same as 6 A Same as 6 A
and 12 kHz cro, VTVM/Scope
Rewind and Line out
Play back ViVvMiscope | 1" OO ss
C REPEAT UNTIL SAME RECORD AND PLAY BACK LEVEL
NOTE: VTVM
Scope
Counter= Frequency counter
W+F = Wow and Flutter meter
AC millivoltmeter
Oscilloscope
i]