Huntron Instruments HTR 1005B-1JS, HTR 1005B-1ES, HTR 1005B-1S Service manual

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MAINTENANCE

FOR MODELS

HTR 10058·15
HTR 10058·1E5

(Q)[N]®

MANUAL

HTR 10058·1

J5

HUNTRON INSTRUMENTS, INC.•15123 Hwy.99North.

Lynnwood, WA

98037.

[phone] • [phone] • Telex

152951

TABLE OF CONTENTS

SPECIFICATION S................................ ................................ ................................ .................. 2

GENERAL DESCRIPTION................................ ................................ ................................ ....... 3

THEORY OF OPERATION................................ ................................ ................................ ......... 5

The Test Signal................................ ................................ ................................ ................ 5

Testing Reactive Components ................................................................ ...................... 8

CIRCUIT DESCRIPTION

Signal Section................................ ................................ ................................ .............. 10

Oscillator

................................................................ ................................ ................... 12

Power

Supply

................................................................ ................................ ............ 12

Cathode Ray TubeCircuit................................ ................................ ............................. 12

INTERNAL SETUP AND ADJUSTMENTS ................................ ................................ ................ 17

TROUBLE SHOOTING

General Information ................................ ................................ ................................ .... 19

Power Supply ................................ ................................ ................................ ............ 19

Signal Section ................................ ................................ ................................ .............. 22

CRT Section................................ ................................ .................................................... 24

Oscillator

Section................................ ................................ ................................ ....

24

LIST OFREPLACEMENT PARTS................................................................ ............................ 25

SETUP, ADJUSTMENT & SCHEMATIC FOR SERIAL# PREFIX 212 ..................................33

© COPYRIGHT 1983- HUNTRON® INST RUMENTS, INC.

HTR

1005B-1S,B-1ES,B-1JS

The information contained herein is the exclusive property of Huntron® Instruments, Inc. (except as
otherwise indicated) and shall not be reproduced in whole or in part without written authorization
fromthe company.

All information contained in this manual is the latest product information available at the time

of
printing. Huntron® Instruments, Inc. reserves the right to make changes at any time without
notice.

1

POWER REQUIREMENTS:

HUNTRON

TRACKER®

SPECIFICATIONS

HTR 1005B-1S
HTR 1005B-1ES
HTR 1005B-1JS

10

Watts
SIZE:
V'Jidth

Height
Length

WEIGHT 5 pounds 5

AMBIENT TEMPERATURE:

Operating
Storage

SHOCK AND VIBRATION:
Will

Maximum

withstand

shock

and vibration encountered in

117VAC
220/240VAC
100VAC

_ 8

commercial

shipping

'"

111/2

a

to

50

-50to60

and handling.

60Hz
50/60Hz
50/60Hz

3

,4 Inch

31/2

deg C
deg C

TEST SIGNAL DATA:

Inch
Inch

oz.

All ratings, except
terminalsofthe TRACKER® .

Waveform sine

Frequency - 80 Hz

RANGE

HIGH
MED.
LOW

CRT SCREEN SIZE 7 cm diagonal
ACCELERATION POTENTIAL 1350V. regulated

TRACE COMPARISON MODE:
ALTERNATE MODE alternates

PROTECTION CIRCUIT:

HUNTRON TRACKER® provides protection against damage caused by touching probes

The
line circuits.

P-P

voltages, are

OPEN-CIRCUIT SHORT-CIRCUIT POWER POWER SHORT-CIRCUIT

Pop

VOLTAGE

VOLT

120 0.29 0.26 0.52 0.8

40
20

conditions

CURRENT mW mW CURRENT
mA R.M.S. R.M.S.

0.27 0.23
64

display

between

existing

two

inputs

across a single

81

at 0.8 Hz

for

silicon

PEAK

0.45 0.7
161

Good/Bad comparison.

diodeinthe

mA

test

PEAK

170

with

WARNING

...

THE SYSTEM TO

HIGH VOLTAGE CAPACITORS DISCHARGED.

BE

CHECKED MUST HAVE POWER TURNED OFF, AND HAVE

2

GENERAL DESCRIPTION

The HUNTRON TRACKER® is a
that

can be usedtodetermine

Components
component
TRACKER® is used
components mounted on printed
bridged by various types

Devices
bipolar
both

Included
PROBES™.
have special
PCB
standard
a-trace" mode (see Figure

FRONT PANEL CONTROLS
DISPLAY CONTROLS:

BRIGHT
VERT
HORIZ

transistors,

analog

etchings

are

under

that

are

and

as

standard

The MICRO

tipssothat

without

equipment

tested

test.

to

normally

and

digital;

the

is a

withatwo
The

test

test

components

of

resistive values.

tested by the TRACKER®

field

effect

certain

equipment

PROBE™

they

can be usedtocontact

dangerofshorting

common

2).
AND

special

the

leads are

circuit

typesofcapacitors

leads

test

INDICATORS (RefertoFigure

typeofCRT

qualityofcertain

terminal

boardsorother in-circuit

transistors;

with

plug

lead

system

inserted

in a

each TRACKER® is a

into

adjacent

which

Controls
Controls
Controls

display

typesofelectronic

of

power-off

include

bipolar

and

the

front

very

is used

the

intensity

the

vertical

the

horizontal

test

into

and MOS

small

terminals

with

and

signal

leads

the TRACKER®

condition,

conditions

the

following:

integrated

inductors.

set

panel

test

component

and leads.

the TRACKER® in the

1)

of

CRT

position

position

processing

that

are placed

and can be used

even

semiconductor

of

HUNTRON® MICRO

jacks.

display

of

of

instrument

components.

across

front
with

circuits,

MICRO

terminals

Also

CRT

CRT

panel. The

components

PROBES™

and

included

"Compar-

display

display

the

to

test

diodes,

including

small

as

RANGE SELECTOR SWITCH:
Three
HIGH

MED
LOW

CHANNEL

Three
Top

Center
Bottom
(ALTERNATE MODE

ON/OFF SWITCH 2-position

CHANNEL
CHANNEL
ON/OFF INDICATOR LED

RED TERMINAL
YELLOW

BLACK

interlocking

SELECT SWITCH:

position

position

position

position

A LED
BLED

TERMINAL

TERMINAL

switch

selects

selects

selects

pushbutton

that

CHANNEL

ALTERNATE MODE.

CHANNEL

alternates

switches

selects

A.

display

select

Selects
Selects
Selects

the

channel

B.

between

OFF
Indicates
Indicates
Indicates
CHANNEL
CHANNEL
INSTRUMENT

oneofthree ranges characterized below.

displayed.

two

120 V
40VP-P

20 V

P-P

sine

sine

wave

P-P

sine wave

inputs
pushbotton
CHANNELAinput

CHANNELBinput
POWER is ON

A INPUT
B INPUT

at 0.8 Hz

that

COMMON

wave

turns

or

test

signal

test

signal

test

signal

for

Good/Bad comparison.)

the

TRACKER@

is being
is being

OFF

displayed
displayed

ON

or

3

CRT

CRT

DISPLAY

INTENSITY

VERTICAL

POSITION

HORIZONTAL

POSITION

rrn~~~~~~~~~r~;~IF~i~H~ANNEL

--"::i\=!;:=;!!!~"""'l'"...r..J

+

LOCATIONS OF FRONT PANEL CONTROLS

The HUNTRON TRACKER® can
and CHANNEL B inputs. This allows the user
to

thatofa known good

can be used

to

compare a known good board

circuit

alternate

for QA or

SELECT

SWITCH

CO

....

u."'--t"F-T"'T11

lOW

RANGE

MEDIUM RANGE SELECT

HIGH RANGE

POWER ON/OFF SWITCH

FIG.I

automatically

to

directly compare the displayofthe suspect

troubleshooting.

with

a board under test.

SELECT

SELECT

between the

Figure 2

ON

LCHAN

NElBlED

CHANNEL B

INPUT

displaysofCHANNEL

shows

how a TRACKER®

A

circuit

CHANNEL
SELECTION
SWITCH

CHANNEL A

LE.D.

RED
TEST

TERMINAL

EBIIII~Oiiiiif--'//=

BLACK
TEST
TERMINAL

YELLOW
TEST
TERMINAL

CHANNEL B

L.E.D.

DO

IJD~H]

aD

COMPARING A KNOWN

A

BOARD

UNDER

TEST

GOOD

FIG.2

4

BOARD

WITH

THEORY

OF

OPERATION

The HUNTRON TRACKER® applies a test signal across

two

terminalsofthe device being tested.

This test signal causes a current to flow through the device and a voltage drop across its terminals.
The

current

while

THE

This
the

the

TEST

signal is an

component

In an open
the

right
Oscillator
The

transformer

and

selecting

flow

voltage

SIGNAL

is processed in

across

80

the

Hz sine wave

such

test

component

that

being tested.

circuit

side trace

condition

comes

the

positive

from negative

Board and presented at the

has the dual purposeofadjusting

the

impedance

levelofthe

a way astocause a vertical

causesahorizontal

alternately

half

half

front

various

cycle

applies

generates the

positive

cycle. The 80 Hz

panel

test

the

terminals

test

ranges.

voltage

deflectionofthe

deflection

of

and negative

left

side

trace on the CRT, and

test

signal

is generated on the

throughasignal

level

for

the

scope

the

scope

voltages

transformer.

various

trace,
trace.

across

ranges

The test signal, as presented at the front panel, electrically appears as though it is being originated
by a

voltage

impedance

Figure 3

the terminals
representation
sensing

are

shows

point

generator

both

the

affects

of

(I).

with

a series

different

electrical

for

equivalentofthe

the horizontal and vertical deflection platesofthe

a voltage generator (GEN)

Across

these

network

output

impedance. The open

all three ranges.

generator

with

a series internal impedance

elements

are

two

section

test

points

circuit

and

how

CRT.

A and COM.

voltage

the

and

generator

voltage

across

Shown is the symbolic

(Z

gen) and a current

ZGEN

GEN

+20~

tV

+--

RANGE= MEDIUM

TEST= OPEN CIRCUIT

voltage

straight

that

shown

across

horizontal

An open
and has

circuit

maximum

represented by a

SIGNAL
SOURCE

(such as

CRT. In the LOW range, an open
righttothe

lower

left

cornerofthe CRT. Figure 4a

LOW ranges.

test

When the
across

the lead. This is

all ranges (see

leads are shorted,

indicated

Figure 4b).

A

-20V

COM

flG3

in Figure3)has zero

the

test

leads. In the HIGH and MEDIUM ranges

trace

circuit

maximum

by a vertical

from the

conditionisshown

current

trace

current

maximum

shows

flows

scope

in the leads and there is zero

from the

flowing

lefttothe

as a

diagonal

traces

top

to the

through

maximum

trace

the

test

rightofthe

from

the

leads

this

upper

is

in HIGH, MEDIUM and

voltage

bottomofthe CRT on

5

+

HIGH

+

TEST:

OPENCIRCUIT

FIG.4.

MED

LOW

+

HIGH

A pure resistance across the test leads would create both current
the

resistance
MEDIUM ranges
the horizontal
wise

from the open
because
rotated
amountoftrace
chosen

Since a pure resistance is a linear electrical element, the resulting trace will alwaysbea
line. Non-linear
trace length.
range. The resistor causes the horizontal
flow
the
peak
microamps.
27 kohms, and in the LOW range is

of

toward

for

through

resulting

current

which

position

the

internal voltage

a more vertical

the

test.

electrical

Figure 5 shows the trace with a

the resistor. The vertical
pattern is a
through

The

would

would

reduction

generator

have the trace

(open circuit),

circuit

the

appear on the CRT as a

diagonal

drop

position

and

rotation

elements

clockwise

resistor

impedance in

is 320

+

MED

TEST:

SHORT CIRCUIT

FIG.4b

deflected

deflected
while
position.

that

rotated trace

56

the

across Z gen caused by the

becauseofthe increased current

depends upon the

are not reactivedonot give a

33

deflection

deflection

microamps.

the

ohms.

clockwise

LOW range

On

all ranges the lengthofthe

kohm resistor across the test leads in the MEDIUM

voltagetobe

voltage is

thatisshorter

The actual

HIGH range is

would

+

LOW

flow

in and voltage drop across

straight

around the

have the

resistor

test

resistance value and the range

reduced becauseofthe current

proportionaltothe

than the open

short

75

kohms, in the MEDIUM range is

trace. The HIGH and

centerofthe CRT from

trace

deflected

trace is reduced

load and the trace is

through

straight

circuit

peak

the

line over the entire

current

circuit

trace. The

current

clock-

load. The

straight

flow

and

is 730

GEN

SIGN
SOlRCE

ZClEN

rv_

RANGE:MEDIUM
TEST'

3201'0

PEAK

.2~

33K

RESISTOR

20-

~

V

A

COM

33K

FIG.5

6

+~

c::r

CLOCKWiSE

ROTATION

A non-linear
half

cycle
cycle. The
would

appear as a near

component

whenitis forward biased and very

voltage

The reverse biased
circuit

trace

on the CRT.

such

drop

across

short

condition

as a

silicon

diode

the forward biased

causing

would

a vertical

cause very

would

little

allow

currenttoflow

junction

tracetoappear

little

currenttoflow

a large

would

during

currenttoflow

during

the reverse biased

be small (i.e. 0.7

that

portionofthe cycle.

and

would

look

during

the

half

V.),

and

this

like an open

Figure6ashowsasilicon
while

Figure 6b

shows

diode

traces

170~Qf\

PEA~

ZGEN

tIOV(\

- \£0V

junction

being observed

in HIGH and MEDIUM ranges.

A

IN914

IOY(\

COM

RANGE;

TEST;

PEA~

FIG.60

-.7V

LOW

DIODE

+

RANGE;

HIGH

TEST;

DIODE

FIG

6b

with

the TRACKER® in the LOW range,

RANGE-MED

TEST;

DIODE

Figure7showsa33

test

signal
resulting
reverses
biased
of

the

the

junctionisforward

in the

polarity

vertical

during the second

resistanceofthe

current

flows

quadrantofFigure

kohm

through

7.

ZGEN

RANGE-
TEST-33K

resistor

being

biased and appears as a near

trace

showninthe

half

diodeismuch

the

33 kohm

7001'0(\

~20ro.

MEDIUM

RESISTOR AND

shunted

second

cycle

and the

greater

than the

resistor

A

COM

IN914

.7V==t/

V-20V

FIG.7

33K

DIODEINPARALLEL

by a

silicon

quadrant

diode

creating

"

diode. During the

short

of

Figure7.Then the

circuit

first

to the

ha.lfofthe

test

signal

test

signal

becomes reverse biased. The reverse

33

kohm resistance, so

the CRT

"~-=::+-+---t--II

pattern

I

~

shown

essentially

in the

fourth

all

cr

7

Figure 8 shows a silicon diode shunted by a

first

the

halfofthe cycle the
The combined currents
on the CRT.

of

junction

the

is forward biased and in parallel

two

devices in parallel is very high and causes a near vertical trace

10

ohm resistor with the LOW range selected. During

with

the10ohm resistor.

A vertical line represents a short
does not have appreciable

conduction

circuit

generated, the vertical trace is displaced
vertical portionofthe trace in the second quadrant

In the reverse

direction

the

diodeisessentially

(zero voltage drop)

until

a forward voltage

to

the

leftbythis

of

Figure

outofthe

condition,

of

and, since the

approximately

0.7

amount. This is shown as the

8.

circuit

and allofthe current

junction

Volts

straight

flows
through the resistor. This causes the trace in the fourth quadrant and partofthe second quadrant
of

Figure

8.

ZIIlEN

RANGE-
TEST-IO,/\,

LOW

RESISTOR

170mQ

PEAl<

~!\

--U70mQ

AND

DIODEINPARALLEL

10.1\.

COM

IN9/4

is

FIG.8

TESTING REACTIVE COMPONENTS

Figure 9

shows
capacitor is approximately 2 kohm at
of27kohm and causes a relatively high current
the generator is resistive and the
outofphase with the voltage (horizontal). The above signal
phase

shift

the trace from a 1uF

result in the

displayofa narrow vertical ellipse on the CRT.

ZeEN

RANGE-
TEST-

test

'47-

MEDIUM

luF

CAPACITOR

capacitor

80

Hz.

This is appreciably less than the generator impedance

component

A

COM

in the MEDIUM range. The reactanceofthe

flow

with

is reactive, the current (vertical) is 90 degrees

luF

a fairly low voltage drop. Also, since

amplitudes

when combined with

this

FIG.9

8

When the vertical and horizontal

is90degrees, the result is a
is placed

across

the

input

circular

terminals

ZGEN

signal

amplitudes

trace.InMEDIUM range

as

shown

in Figure 10.

are equal and the current-voltage phase

this

occurs

when a 0.13uF

capacitor

shift

Figure

resistor
angle
of

the

11

shows

the

RANGE-

TEST-

CRT

MEDIUM

.13uF

pattern

in the MEDIUM range. The

in such a way

ellipse

that

from the

ZGEN

the

circle

vertical

I~,

I "

\ I

"'

CAPACITOR

that

resistor

narrowstoan

axis

E

.

results

across

A

COM

FIG

from

.13uF

10

shunting

the

ellipse

a 0.13uF

capacitor

alters the current-voltage phase

and there is a

capacitor

counterclockwise

+I~

L--

~

J

COUNTERCLOCKWISE

ROTATION

with

a 20 kohm

rotation

RANGE:

TEST:

MEDIUM

.13uF

CAPACITOR

AND

20K

RESISTORINPARALLEL

FIG.II

9

CIRCUIT DESCRIPTION

SIGNAL SECTION:
Figure

is shown

12

is a basic

with

circuit

representationofthe signal sectionofthe TRACKER® . The

a test diode in place.

6.8

RI

PR I SEC

circuit

TI

{\

V

FIG,12

VERT

R8

-

-

HORIZ

TEST

DIODE

-

-

During the half cycle portion when the horizontal sideofthe secondary is negative, the test diode

that

very

little

is reverse biased so
R8.

The vertical end of the secondary is very close to ground potential becauseofR8,

current

flows

through the

transformer

secondary and resistor

and a very

small voltage appears on the vertical lead. •

of

Since the impedance across the horizontal side
appearing on the vertical side, most

half

During the next

approximately

of

side
that

the secondary. The voltage that appears acrossR8is a direct representationofthe current

flows

through the test diode.

.7

cycle the horizontal side will go positive and the test diode

Volt. Also current will

of

the secondary voltage

flow

through

the secondary is very high relative to that

will

appear on the horizontal side.

will

clamp

R8

creating a large voltage at the vertical

at

10

Figure
a phase

13

is a more

angle

detailed

correction

circuit

when the

description

test

points

are

with

the HIGH range selected.

shorted

and

compensates

for

R4

provides

CRT

for

distortion.

80Hz

osc

NOTES:

RI

e

Q 3~Q 6

TH.

ARE

PN2222,

THERMISTOR

ALL

VEIIT

OTHERS

84IN

MPS

FIG.13

+IeoV

A42

R23

1101(

RZ4

IK

-IV

L--___4__-&V

TO

Of'

R31

1I0K

l+-..-JvVv--+&V

R2I

I.U

R34

3K

01

IN.H

R53

VEIIT

POSITION

QZ

THE

lASE

01

HOltZ

~1T10ll

IIll

R16

is the horizontal phase

the

horizontal
maximum
impedance

amplifier

voltage

appears at the

presented by

ReferringtoFigure 13,

Transistors

06,

and

compensated

A

positiveornegative

on the vertical

amplified,

01,02,03,

associated

components

to

avoid

deflection

phase corrected, and placed on the

R15

going

correction

as well as CRT

horizontal

R21

and IC1.

and

R22

are the vertical and horizontal gain

and

associated

form the

drifting.

signalatpoint

plateofthe CRT. A

and

compensates

distortion.

endofthe

R16

corrects

components

horizontal

CD

positive

Referring

for

form

amplifier.

will

be

amplified,

or

horizontal

Vertical and horizontal positions are controlled by a variable
02

and

05

respectively.

Signal
voltage

transformer

and

impedance

TR1isdesignedtoclose

levels.

tolerances

11

for

the

impedanceofR21

backtoFigure

secondary

this

difference.

only

the vertical

These

amplifiers

phase

negative

signal

deflection

DC

voltage on the basesoftransistors

so astoprovide the

12,itwas

when there is

adjustments

amplifier,

respectively.

while

are

temperature

corrected, and placed

at

point

plate.

proper

going

shown

into
that

infinite

04,

0

will

secondary

05,

be