Sony srs pc 3 dw service manual

Page 2

SAFETY CHECK-OUT

After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:

Check the antenna terminals, metal trim, metallized
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5 mA (500 miCroampers). Leakage
current can be measured by any one of three
methods.

1. A commercial leakage tester, such as the
Simpson 229 or RCA WT»S40A, Follow the
manufacturers instructions to use these instru-
ments,

2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for

3. Measuring the voltage drop across a resistor by
means of a VOM or batteryoperated AC volt
meter. The limit" indication is 0.75V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have 3 2V AC range are
suitable (See Fig A)

To Exposed Metal
Parts On Set

AC
voltmeter
(0. 75 VI

0.15M:

{gm/tit /
'__i

7' Earth Ground

Fig. A. Using an AC voltmeter to check AC /eakage,

this job
SECTION 1
This section is extracted from
GENERAL instruction manual.
Connections Power Source

Connecting to the active speaker with output for woofer (SRS-PC41IPC51IPC71 etc.)

wooler
(real)

i
1
lit?
to outpul ioi wooler

(ouwurrwoorrli) '
etc.)

Atllvn speaker
(not supplied)

(roar)

(innit)

to mwr i (phone inks) or
INPU" z, 3 (item mini [:(lt)

Vim znn adjux| lhe volume at the woolur whieh is
linked Io "It: vulnmcof KM mnmxlcd active
six-nkur.

When connerting to the INPUT 2, 3
use lite (onnlxling cord (Swine rnini plug a
sum mini plug) lnot supplicdk

Connecting to the active speaker without output for woofer (SRS-PC21 etc.)

Personal somautsn

. Wootnv
Dlxullin,WA|.KMAN, (mm) m In India
(In .
_ _ nulpul (It
" to INPUT 2
(stereo
.nini task) \\
lo IN'UT 1
(phone lads)

When the smaller is «Mutt-(It'd loa .nonnurnl jack
lhu sound may nnt (me through thu right
«innmtui sponkur. Whun you usu KM nplittnal
Sony plug adaptor lC-mHC, sound will mmt.
titnntjjh tulh mnnmtd spanks-rs.

Notes

- You can conned phono and slum mini plugs to
the INPUT 1,2 and : jadu. tiyou use those types
aliackr at lbcsame tinto, you will have to ndjust
in volume oi the compnmnls inunsu you will
gel the sound lmrn all at them.

. "your pctsnnnl mmpulcrdocs not have audio
output jacks, you will have to imlnll n sound
mini, etc. Consult qualified personnel tor
delails.

Connecting to a stereo phono type
headphones ia Use Ihd: npfllmul axctaallc (brim-cling card.

wants-(rut)

«:3

»
lo I wall outlet

How to Use

rowrll

Wool" UNI)
indicator

Attivuostkar
(tight)

Auive speaker
(loll)

Turn the Halve speaker and

Pres: tha rowan swlkh (is on).

The POWER lndiouor lights up.

Adjust the volume wllh the VOLUME
control.

Adjust "in balance 0! lhlr vo|umu bclwun lhl:
wooiorsnd lhl: noiivt- speaker.

Us. Ihl TURN OVER control to find [he
point where the bus level or the
wooler Ind the connected naive
spelker us well balanced.

When connecting to the anive speaker
with output ior wooler

il lhe volume is ndjustod onoo, ihL- volume oi lite
woofer is najustud automatically is it is hnkod to
tho volume imi oi Ihc aeliw: speaker.

when connecting to the active speaker
without output tor wooier

Adjusl lhte Volume oi the active speaker and the
woolen

Playing the attiva speaker
See Ihe ootrnting instructions oi the active spenktr.

Alter listening, press the POWER swilch to OFF).
The POWER indicator goes all.