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CAUTIONUse of controls or adjustments or performance of procedures other than those specif ied herein may result in hazardous ra-
diation e xposure.
Notes on c hip component replacement
- Nev er reuse a disconnected c hip component.
- Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Fle xible Cir cuit Boar d Repairing
- Keep the temperatur e of soldering iron around 270ËšC
during repairing.
- Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).
- Be careful not to apply force on the conductor when soldering or unsoldering.
SAFETY-RELA TED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE
WITH MARK ! ON THE SCHEMA TIC DIAGRAMS AND IN
THE P ARTS LIST ARE CRITICAL TO SAFE OPERA TION.
REPLA CE THESE COMPONENTS WITH SONY PARTS
WHOSE P ART NUMBERS APPEAR AS SHO WN IN THIS
MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY .A
TTENTION A U COMPOSANT A YANT RAPPOR T
Ã- LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR
LES DIA GRAMMES SCHÉMA TIQUES ET LA LISTE DES
PIÈCES SONT CRITIQ UES POUR LA SÉCURITÉ DE
FONCTIONNEMENT . NE REMPLA CER CES COMPOSANTS
Q UE P AR DES PIÈCES SONY DONT LES NUMÉR OS
SONT DONNÉS D ANS CE MANUEL OU D ANS LES
SUPPLÉMENTS PUBLIÉS P AR SONY.
Laser component in this product is capable of emitting radiation exceeding the limit f or Class 1.
This appliance is classif ied as
a CLASS 1 LASER product.T he CLASS 1 LASER PR OD-
UCT MARKING is located onthe r ear e xterior.
This cautionlabel is locatedinside the unit.
SAFETY CHECK-OUT
After cor recting the original service problem, perfor m the follow-
ing safety checks before releasing the set to the customer: Check the antenna ter minals, metal trim, metallized knobs, screws,
and all other e xposed metal par ts for AC leakag e. Check leaka ge as
descr ibed belo w.
LEAKA GE
The AC leakag e fr om an y exposed metal part to earth Gr ound and
from all e xposed metal parts to any e xposed metal part having a
r eturn to c hassis, must not exceed 0.5 mA (500 micr oampers). Leak-
a g e current can be measured by an y one of three methods.
1. A commercial leaka ge tester , such as the Simpson 229 or RCA
WT -540A. F ollow the manuf acturers instructions to use these
instruments.
2. A ba ttery-opera ted AC milliammeter . The Data Precision 245
digital multimeter is suitab le for this job.
3. Measuring the v oltage drop across a r esistor by means of a VOM
or battery-oper ated AC v oltmeter . The limit indication is 0.75
V , so analog meters must ha ve an accur ate low-voltage scale .
The Simpson 250 and Sanw a SH-63Trd are examples of a pas-
si ve V OM that is suita ble. Nearly all battery operated digital
multimeters tha t have a 2V AC range are suitab le. (See Fig. A)
Fig. A. Using an A C v oltmeter to c heck AC leakage .
0.15 µF
To Exposed Metal
Parts on Set
1.5k
ACvoltmeter(0.75V)
Earth Ground
