Mercury Electronics 1400 Service manual

INSTRUCTION

MERCURY

ELECTRONICS

manufacturers

of

quality

MANUAL

CORP.

electronic

products

The

Model

of

all

types

large

electrolytics.

acitor

1s

without

Capacity

capacitors.

An
instruments
age
radios.
as 3 working

others

important

that

protects

Many

with

values

1400

of

capacitors,

the

are

feature

sold

of

these

volts

perfect

INTRODUCTION

is a valuable

from

the

The

1400

will

necessity

measured

even

the

low-voltage

D.C.

accuracy

at

of

much

small

The

of

removing

in-circuit

the

electrolytic

higher

electrolytic

Mod

with

SPECIFICATIONS

service

smallest

electrolytics

el

no

check

prices,

1400

ch

aid

for

them

on

filters

tests

ance

for

ceramic

open

from

all

popular

test,

is

used

these

of

in-circuit

types

or

shorted

the

not

found

the

low

in

are

rated

and

damage.

testing

to

cap-

circuit.

electrolytic

in

other

test

volt-

transistor

as

low

all

1

Shorts
6

Open
citors

Electrolytic
over

Indicator -EM84
tions
tion

Power
trolytic

Case
design.
ensures

Test -Effective

ohms.

Test -Effective

as

small

the

range

printed

of

all

test

Supply -Line

test.

- Smart­Compartment

convenient,

Test -Values

of

right

results.

modern

as

7 mmfd.

2 Mfd.

ultra-modern

on

the

isolated

styling

for

safe

in-circuit

on

all

of

to

450

instrument

coaxial

storage.

with

capacitors

electrolytic

Mfd.

bar

indicator

panel

with

special

in

Mercury's

cable

shunt

in-circuit

capacity

tube.

for

low

exclusive

and

cheater

resistance

down

found

Simple

accurate

voltage

metal

line

as

low

to

capa-

in-circuit

instruc-

interpreta-

for

elec-

case

cord

as

3

The

simplicity

with which a

set

TV

can

of

the

complete

be

accomplished.

DESCRIPTION

Model 1400

in-circuit

test

Panel

of

all

is

indicative

the

capacitors

of

the

in

ease

a radio or

The knob

steps

knob

also

indicator

The

trolytics,

The
interpretation
the

eye

the

diagnosis

The
manently
compartment

for SHORTS, OPENS, and

either

at

in proper

turns on

jewel

large

center

both in

indicating

window.

co-axial

connected

below

in-circuit

the

left

sequence

the

instrument

in

the

lower

dial

or

out-of-circuit.

eye

is

of

eye

readings

This

saves

of a difficult

cable

test

to

the

the

chassis

or

out-of-circuit

OPERATING INSTRUCTIONS

controls

for normal

is

at

the

functions
troubleshooting

power.

right.

used

for reading

the

upper

are

printed

value

troubleshooting

intermittent

lead,

with fully

instrument

along

ELECTROLYTIC

without changing

The

right.

right on

condition

insulated

and

stores

with

the

of

the

instrument,

procedure.

1400

panel

capacity

Instructions

cheater

VALUES

values

the

panel,

time,

to

mere

test

conveniently

test

has

for prop,er

and

seconds.

clips,

line

cord.

can

be

leads

with

This

a power

of

elec-

just

above

can

is

in

the

Tests

made

or

clips.

reduce

per-

Preliminary

1.

Always make

power

2. '

Make

charge

damage

3.

Plug

hand knob to

glow and

4.

tests

on a

receiver

line.

sure

capacitors

on

capacitors

the

Model 1400.

the

Model 1400 into 117V. A.C.

the

eye

indicator

being

can

position

bars

give

marked SHORTS.

tested

erroneous

will

which is

are

fully

power

glow.

disconnected

discharged

test

results

line

and

Power

first.

and may

rotate

jewel

from

will

the

Any

left

TEST

1.

2.

FOR

SHORTS

With

the
sulated
indicator

If

the

capacitor

capacitor

function

cli~

across

tube

is

shorted,

on

is

switch

the

your

1400

not

shorted,

the

set

to

test

capacitor

panel.

the

bars

will

for SHORTS,

to

be

tested,

bars

will

clos

e.

connect

and

observe

remain open.

the

If

in-

the

the

3. The

results
capacitor
resistances

TEST

1.

2.

will not

FOR

Rotate
nect
observe

If

OPENS

the

the

capacitor

affect

the

insulated

the

capacitor

3.

The

nature

takes

shunting

accurate

whether

ELECTROLYTIC

1.

The

test

clips
capacitor.
AC

test

signal

low-rated

any

shown

under

and

the

function

indicator

is

open,

of

the

components

VALUE

can

Polarity

capacitor.

by

your Model 1400

test

is

in-circuit

shun t coils

accuracy

switch

clips

eye

is

not

open

the

bars

high

frequency

made

in-circuit

TEST

be

connected

is

not

of

sufficiently

or

with

as

of

the

to

the

position

across

the

on your 1400

the

bars

will

close.

test

into

account.

or

:

directly

important

low

are

accurate

out-of-circuit.

little

as

6 Ohms

whether

Circuit

impedance

test.

marked OPENS. Con-

capacitor

to

be

tested"

Panel.

will

remain open.

If

provided by the Model 1400

Tests

for OPENS

out-of-circuit.

across

since

voltage

the

so

1400

as

any

electrolytic

provides

not

to

damage

the

shunt

and

the

will

be

an

2.

For

multiple

one

test

other

test

Common

for

metal-cased

tubular

electrolytics,

clip

to

the

clip

to

each

negative

terminal

electrolytics,

electrolytics.

common

of

the

test

each

negative

positive

is

usually

or

the

section

terminal,

leads,

the

can

black

wire in

separately.

and

connect

one

at

a time.

(or

chassis

multi-section

Connect

the

ground)

5

3.

Set

the
40-450
tested.

If

the

values

functien

Mfd.

value

are

switch

depending

is

unknewn, try

mere cemmenly feund in

en

to.

the

the

proper

value

the

ef

higher

TV

range,

the

range

sets

either

2-40

electrolytic

first,

as

and

radies.

Mfd.

to.

the

er

be

larger

Ne harm
wrong range.

4. After
indicater
peinter
capaciter.

Nete
electrolytic
electrolytic
is

neither

5.

If

yeu
lytic
scribed

The
elect

6. Shunt
cuits
in-circuit

Where
matic
parallel
citers
such
cennecting

can

the

test

bars

will

then

that a test

as
capaciter

epen

cannet

range

and

in

Step 4.

ranges

rely

previded

tics

resistances

are

nermally

testing.

ne

test

diagram

with the

(less

than

cases,

ene

be

dene

clips

are

are

at

a minimum

read

fer SHORTS

well

as

ner

sherted,

get

the

test

fer

by

in

use

teday.

feund in

high

can

be

to.

see
electrelytic
10

Mfd.)

an

eut-ef-circuit
ef

the

if

an

electrelytic

cennected,

the

value

en

any

shews a definite

se

bars

to.

value

the

Model 1400

mest

eneugh

ebtained

if

extremely

is

capaciter

rotate

epening

(in

er

fer

OPENS

ether

ne

further

teuch,

in

exactly

electrelytic

to.

cause

en

either

lew

capaciter.

this

cenditien

test

can

leads.

capacitor

the main

(barely

microfarads)

may

capaciter.

value

in

test

is

switch

to.

the

cever

ne

difficulty

range,

shunt

Only

to.

readily

the

same

ever

radio. and TV

resistance

en

be

be

is

tested

dial

until
teuching).
ef

the

electrolytic

be

made

Hewever,

microfarads,

required.

ether

electro-

manner

99%

ef

during

check

the

is

small

capa-

expected.
made

by

en

en

if

as

all

cir-

sche-

in

dis-

the

the

The

an

an

it

de-

In

6.

TROUBLE SHOOTING

GENERAL

The

Model 1400
shorted,
of any

1.

or

small

With

intermitten

test

SHORTS.

2. Without moving
open,

capacitor

If

an
each
on

it,

of

the

intermittent
of

while

3.

TV TROUBLESHOOTING

Refer

to

TV

check

with

the

provides a fast

capacitors.

cap~citor,

clips

If

eye

proceed

connected

remains

the

is

condition

the

above

tests;

watching

bars

means

the

Schematic

Model 1400:

test

good.

the

capacitor

to

locate

WITH

means

To

as

follows:

across

open,

clips,

exists,

also

indicator

make a

the

capacitor

switch

try

applying

is

defective.

the

following

THE MODEL 1400

of

troubleshooting

quick

capacitor,

is

good.

to OPENS.

wiggle

the

heat

bars.

Any momentary

capacitors

in-circuit

capacitor

or

switch

If

eye

cold,

open,

check

to

remains

or

for

during

tapping

closing

quick

Circuit

Vertical

Sound

Horizontal

Trouble

Unstable

Poor

quality

Poor

sync.
raster
(weak

high

sync.

or

voltage)

no

Capacitors

·

Integrator

·

Timing

•

Wave-shaping

•

Feed

back

Ratio

detector

lytic

All

capacitors

diode

Hor.

·

Coupling
hotiz.

·

•

output

Horiz.

drive
capacitor
Horiz.

Lin.
capacitors

to

network

network

network

AFC

capacitors

tube

(wave-shaping)

Coil

Test

circuit

electro-

in

duo-

circuit

by-pass

to

7.

Circuit

Power

Supply

Trouble

Narrow

raster

Capacitors

All

power
electrolytics
Boost

filter

to

supply

capacitor

Test

Tuner

Sync.

Color
(Col

Col

or

(Color

Killer

or

Matrix

TV)

TV)

Blank

raster,

no

sound

No

sync,

weak

sync

No

color

(Black-and-

White

O.K.)

.

Cannot
black-and-white
picture
(discoloration)

achieve

~

All

ceramic
capacitors
Tuner

B +

capacitors
Tuner

AGC

Sync

clipper
capacitor
Sync

separator
by-pass
coupling

Blocking
blanker
Capacitors
tector

network
detector
Capacitors
cillator
stages

Input

coupling

to

color

Input

capacitors

CRT

grids
By-pass
or

"2"

oscillator

by-pass

capacitors

input

screen

and

plate

capacitors

capacitor

circuit

in

killer

or

phase

network

.

in

burst

or

reactance

capacitors

difference

to

capacitors

demodulators

in

de-

os-

amps.

color

in

"X"

I

9-

-,

8

HI-FI

STEREO,

UHF,

FM, AND

FM

MULTIPLEX TROUBLESHOOTING

Circuit

Audio

Output
(Monaural
Stereo)

Audio

Amp.
(Monaural
Stereo)

Multiplex

(FM)

Multiplex

(FM)

Converter
(U.H.F.)

or

Or

Trouble

Distortion

both

channels)

Low

volume

Poor

L-R

Separation

.

Only

one
channel
operative

No

UHF

ception

re-

(one

Or

Capacitors

Coupling

output
Cathode
lytics.

All
capacitors
Volume
capacitors
Bass
capacitors

All
network
Coupling

L +

stages

.

Inverter

capacitors

Shorted
capacitor
Open

in

L + R

Open
capacitor

Heater

B +

capacitors
All
network

capacitors

stage

by-pass

audio

coupling

control

or

treble

caps.

in

capacitors

Rand

L - R

stage

deemphasis

coupling

or

electrolytic

to

decoupling

decoupling

capacitors

to

Test

grids

network

network

tuned

network

capacitor

L - R

Lo-Pass

network

in

to

electro-

filter

in

mixer

channel

input

network

capacitors

tuning

9

~-'-----~-.--.~.-

:'i',

.,.

330

..

r .

.

3K

10

2W

SHORTS

~

~~:---

lW

250

22K

220

K

~2-40

40

-450

TEST

CABLE

1-------------------

~

I I

,------J

47K

~

~470K

_001

2.2M

I I I

I \

EM84

r

1.5
SC4

"""

R

Gl

G-W

R-W

290V

BU.

12.9V

S.3V

MODEL

1400

IN-CIRCUIT

CAPACITOR

TESTER

BK.

,-

--./

R-BK.

".