Aiwa AD-R450 - service, Service Manual, Page: 11 / 21

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A D JU ST M EN T
8 . B i a s O s c i l l a t i o n Freq uen cy Adjustment
S e t t i n g s : •Adjust ment l o c a t i o n : ! . 4 0 1
Method: S e t no the R E C mode, and adjust L 4 0 1
for 8 5 k H z .
6 . R E C / P B Freq uen cy Response Adjustment
S e t t i n g s : • 'Pest t a n e : T T A- 1 1 9 J
• T e s t p o i n t : L I N E O U T
• 1 nput: L 1 N E I N : ! k H z & 10 k H z . 33 d B
• Dolb y N R S W : O F F
■Adjustment l oc a ti o n : S F R 4 1 1 ( L c h)
S F R 4 1 2 ( R c h )
Method: Re cord the 1 k H z & 10 k H z . 33 d B
si gn als and adjust the R E C volume for
40 mV output, then pla y back the recorded
tape and adjust so that the output d if fer en ce
betseen 1 k H z and 10 k H z is 0 . 5 ± 0 . 5
d B or less.
7 . R E C / P B Frequency Response Adjustment
( Z M O D E L O N L Y )
S et t i ngs: • T e s t tape: T T A - 1 1 9 D
• T e s t point: I. I N E O U T
• I nput: I. I N E I N : 1 k H z 10 k H z . 33 d B
• D o lb y N R S W : O F F
■ Adjustment loc ati on: S F R 3 5 3 ( L c h )
S F R 3 5 A ( R c h )
Method: Re co rd the 1 k H z & 10 k H z . 33 d B
sig n als and adjust the R E C volume for
40 mV output, then play back the recorded
tape and adjust so that the output d iffer en ce
between 1 k H z and 10 k H z is 0 . 5 ± 0 . 5 d B
or less.
5 . R E C / P B G a i n Adjustment
S e t t i n g s : • T e s t t a p e : T T A - 1 1 9 J
• T e s t p o i n t : L I N E O U T
• I nput . - L I N E ! N : I k H z , 33 d B
■ Do lb y N R S W : O F F
• Adjustment locat ion: S F R 3 5 1 ( L c h )
S F R 3 5 2 ( R c h )
R ecord the 1 k H z . 33 d B si gnal and
adjust the R E C volume for 40 mV output,
then play back the recorded tape and adjust
so that the output d i f f e r e n c e is 0 — 1 -0 .5
compared with the R E C mode.
Method:
3 . P B G a i n Adjustment
S ett i ngs : « T e s t t a p e : T T A - 1 6 1
• T e s t point : L I N E O U T
• Do lb y N R S W : O F F
• Adjustment locatio n: S F R 5 0 1 ( L c h )
S F R 5 0 2 ( R c h )
Method: A d ju s t so that the output is 5 4 0 ± 10 m V .
4 . P B Frequency Response Adjustment
S e t t i ngs: - T e s t tape: T T A - 3 1 7 E
• T e s t p o i n t : L I N E O U T
• D o lb y N R S W : O F F
• Adjustment loc ati on: S F R 3 0 1 ( L c h )
S F R 3 0 2 ( R c h )
Method: P l a y back the test tape, then adjust so
that the output d iffer en ce between 1 k H z
and 10 k H z is 0 . 5 ± 0 . 5 d B or less.
9 . B i a s T r a p C o i l Adjustment
S e t t i n g s : " A d j u s tm e n t [ oca t i on: L 3 5 1 ( L c h )
L 3 5 2 ( R c h )
Method: A d j u s t L 3 5 1 . 3 5 2 for minimum leakage.
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