Technics SA 515 Service Manual

Page 17

14

D'AFFICHAGE

PAH PFIEPARATIONS ELEMENTS REGLES PROCEDURE DE REGLAGE
PREREGLAGE

BEGLAGE DE LA SEPARATION DES CANAUX lNaimeF bandl
1. Interrupteur de wmme PM

PM GENERATEUR FREQUENCE

BF! ANCHEMENT FHEGUENCE

IF narrow.
2, Placer le commutareur de
1 Iage silencieux d2 FMI
Branchez sur la prise iraggxgiz rvéigode FM sur on/auto.
danlenne PM a iravers 100% er Branchaz un oacilloscooe VH303 3. Régler vnaoa de xelle sane
Line anlenne limive FM. 400: 100. 1 MHz sur les homes de haul- (Narrow IF Separa- que la sortie droile soil mini-
(Signal sléréc pilote a [M de G parleur dis I'ampliluner, lion) male quand la commanda
10% de modulation) D f u daccord siereophoniuoe esi

clans le mode gauche
(modulation du canal gauche)
et aue la sortie gauche soil
minimal: dens/node droilv

I HOW TO REPLACE CHIPS

(RESISTOR, CAPACITOR AND JUMPER)

1. Remove solder from chip by using solder sucker,

2 Remove chip with tweezers by rotating it while remov. Tweezers
ing solder as shown in fig. 12.

3A Solder circuit board first and then solder chip in the
direction of the arrow as shown in fig; 13.

Notes:

Unsulder
I, Do not use chip again which is removed from primed @
circuit board.

2. Use lead wire with insulator for replacement instead of

chip jumper,
Fig. 12
Color Original Pam Name
Black Chip Hesislor and Jumper
. . i a Note for replacing chips
Brown, Wh'm or Green J Chip Capacnor 1. Do not heat chips more than three (3) seconds.
2. Be careful nm to damage the electrode of chips.
3. Use soldering iron (less than 60W) and tweezers for
replacing chips.
Chip I Precautions for repair
W N A.»
I Soldenngimn When frequency is not indicated, FL (display tube), FL
driver. digit circuil. and micro-computer must be checked

Solder by oscilloscope
In this case, take care not 10 allow shoncircuit between IC
terminals or application of voltage from measuring instru-

. merit to IC terminals.
Fig. 13