NAD 705 Service Manual

A : AM SECTION
1 . V .C .O .
ADJUSTMENT .
A .
MEASURE THE VOLTAGEBETWEEN TP7 AND TP4 (GROUND) . (FIG 4) .
B . SELECT AM MODE,
AND SET THE UNITUNDER TEST TO 520 KHZ (UL,
CSA) . (522 KHZ UK,
AY,
EU) .
C . ADJUST T406
UNTIL THE VOLTAGEBETWEEN TP7 AND TP4 IS IN THE
RANGE 0 .9 V TO
1 .1
V .
D . SET THE UNIT
UNDER TEST
TO
1610 KHZ (UL, CSA)
(1611
KHZ
UK, AY, EU) .
CHECKTHAT THE VOLTAGE
BETWEEN
TP4
AND TP7
IS
IN THE RANGE
7 .35 V TO 7 .65 V .
2 . SENSITIVITY ADJUSTMENT .
A . CONNECT THE UNIT UNDER TEST AS SHOWN IN FIG . 5 . MAKE SURE
THAT THE SIGNAL GENERATOR IS CONNECTED VIA A 22P CAPACITOR .
B . SET THE SIGNAL
GENERATOR
AND UNIT UNDER
TEST
TO 600 KHZ
(UL, CSA) (603
KHZ UK,
AY, EU), 30dBUv
.
C . ADJUST T405 FOR MAXIMUM
OUTPUT
LEVEL .
D . SET THE SIGNAL GENERATOR AND UNIT UNDER
TEST
TO
1400KHZ
(UL, CSA) (1404 KHZ UK, AY, EU) .
E . ADJUST TC404 FOR MAXIMUM OUTPUT .
3 . IF TRACKING
ADJUSTMENT PROCEDURE
A . USING THE TEST SET-UP DESCRIBED ABOVE (FIG
. 5) SET
THE SIGNAL
GENERATOR AND UNIT UNDER
TEST TO 600 KHZ (UL, CSA)
(603
KHZ UK,
AY, EU), 30dBUv .
B .
ADJUST T407 FOR MAXIMUM OUTPUT .
B : FM SECTION .
1 . V .C
.O .
ADJUSTMENT .
A . CONNECT A
DC
VOLTMETER
TO TP7
AND TP4 (GND)
(FIG .
4) .
B . SET THE UNIT UNDER TEST
TO 87 .5
MHZ
FM
MODE .
C .
ADJUST L402 UNTILTHE
VOLTAGE MEASURED IS
IN
THE RANGE
3 .0 V TO 3 .1 V .
D . SET THE
UNIT UNDER TEST TO 108 MHZ . CHECK THE VOLTAGE MEASURED
IS IN
THE
RANGE 22 V TO 25 V .
2 . 7 .2 MHZ REFERENCE FREQUENCY
ADJUSTMENT .
A . CONNECT A FREQUENCY COUNTER
TO TP5 (FM OSC)
AND
GROUND
(FIG 7) .
B . SET THE UNIT UNDER TEST TO
90
MHZ
FM
MODE .
C . ADJUST TC405 FOR A MEASUREDFREQUENCY
OF 100 .7 MHZ
+/-
3HZ .

NAD 705 Specifications

General

Brand	NAD
Model	705
Category	Receiver
Language	English