Goldstar P43HW User manual
VIDEO
CASSETTE
RECORDER
SERVICE
MANUAL
MODEL
:
P43HW
CAUTION
BEFORE
SERVICING
THE
UNIT,
READ
THE
"SAFETY
PRECAUTIONS"
IN
THIS
MANUAL.
TABLE
OF
CONTENTS
SECTION
1
SUMMARY
KEY
TO
ABBREVIATIONS
......eceecsessereeeeteeeees
1-1
IMPORTANT
SAFETY
PRECAUTIONS
.............
1-2
*
Precautions
during
Servicing
SAFETY
CHECK
AFTER
SERVICING
..............
1-3
®
Insulation
resistance
test
*
Dielectric
strength
test
*
Clearance
distance
*
Leakage
current
test
FEATURES:
scscssssstscesecsvcecetccassdsvsascscopsostspeotbosicenchutesocs
1-4
LOCATION
OF
CUSTOMER
CONTROLS
........
cesses
1-5
SECTION
2
CABINET
&
MAIN
FRAME
SERVICE
METHOD...
1.
Electrical
Service
Fixture
List
.
‘i
2.
SVC
FIXTURE
Connecting
Method
......ccsserscssee
2-2
CABINET
DISASSEMBLY
ou...
eeseessereseesersees
2-4
1.
Top
Case
...
2.
Bottom
Cover
1.
Housing
and
Deck
ASS'Y
......secccsvscssensseesesseenes
2-5
2.
Power
Ass'y
..
3.
Timer
Circuit
Board
.
4.
Main
Circuit
Board
EXPLODED
VIEWS...
sccsssecsssecssscessssesesesrseees
1,
Cabinet
&
Main
Frame
Section
..
2.
Packing
&
Accessory
Section
.
3.
Remote
Control
Section
SECTION
3
ELECTRICAL
ELECTRICAL
ADJUSTMENT
PROCEDURES......
3-1
1.
SOPVO
CirCUit
....sssescsoneersseressncnsssavessasostanscnssensrense
3-1
2.
Audio
Circuit
3.
Tuner/F
Circuit
.
BLOCK
DIAGRAMS
uu...
cece
ccsteeetrereeeeenenees
3-3
1.
Power
(SMPS)
Block
Diagram
.3-3
2.
Jack
Block
Diagram
..
~
3-5
3-7
3.
Servo’Syscon
&
Audic
&
Tuner
&
IF
Block
Diagrams...
$-
4.
VIC
BOCK
DiaQram
..cseessrecsereerseseasecceseeseensers
3-11
CIRCUIT
DIAGRAMS
1.
Power
(SMPS)
Circuit
Diagram
2.
Jack
Circuit
Diagram
3.
Timer
Circuit
Diagram
vc
eecssesessesserseneeseseaes
3-19
4.
Servo/Syscon
&
Audio
&
Tuner
Circuit
Diagrams
.
3-23
5.
Y/C
Circuit
Diagram
wee
3-27
6.
IF
Circuit
Diagram
........scsscssssscssassccssorsensnrorseeeses
3-33
7.
CONNECHION
Diagram
w.esereseserrecseerrseees
+
3-35
PRINTED
CIRCUIT
BOARD
DIAGRAMS..
3-37
1.IF
P.C.Board
«0.
soneneseeaseenssraanensesenae
ae
--
3-37
2.
Jack
P.C.
Board
«ses
asbeties
pasatsnttvandessduseatacsts
3-37
3.
Main
P.C.Board
-
3-39
4.
Power
(SMPS)
P.C.Board
3-41
5.
Y/C
&
Pre-Amp
P.C.Board..
6.
Timer
P.C.
Board
......ssscessreersseesenenensnnensenanesersens
SECTION
4
MECHANISM
;
ml
NOTE)
The
tabie
of
contents
for
this
section
is
edited
separately.
SECTION
5
REPLACEMENT
PARTS
LIST
©
Mechanical
Section...
essseccsssesesserescscessersereres
Cabinet
&
Main
Frame
Section
.
Packing
Accessory
Section
Remote
Control
Section
....
®
Fixture
Section
®
EISCHICADSOCHON
scvincssnscsdscnavycncepsetsnaneccorssarvosaion
5-6
SECTION
1
SUMMARY
KEY
TO
ABBREVIATION
AC
‘Alternating
Current
LPF
:Low
Pass
Filter
ACC
‘Automatic
Color
Contro}
M
MAX
:Maximum
ACSS
‘Automatic
Channel
Setting
System
MD
‘Modulator
ADJ
Adjust
MECHA.CTL
:Mechanism
Controt
NE
‘Audie
Erase
MIC
:Microphone
AFC
‘Automatic
Frequency
Control
MIN
‘Minimum
AFT
‘Automatic
Fine
Tuning
MIX
‘Mixer,
Mixin
AGC
‘Automatic
Gain
Contro!
MM.
‘Mono
Mult
Vibrator
AH.SW
‘Audio
Head
Switch
MMV
‘Monostable
Multivibrator
ALC
‘Automatic
Level
Control
MOD
‘Modulation
Modulator
AM
‘Amplitude
Modulation
MODEN
:Moduistion-
Demodulator
ANP
‘Amplifier
MPX
:Multiplex
‘Antenna
APC
Automatic
Phase
Controi
N
AB
:Noise
Reduction
ASS'Y
“Assemoly
©
seeouato!
AUX
‘Auxiliary
osD
:On
Screen
Display
B
aT
07
eee
PE
:Playback
BGP
‘Burs!
Gate
Pulse
PCB
:Primted
Circuit
Board
BPF
‘Bandpass
Filter
P.CTL
:Powear
Control
Bs
‘Brodcesting
Satellite
PER-AMP
‘Preamplifier
BW
or
BW.
‘Black
and
White
ee
cone!
Failure
c
ry
=
=
:Pulse
Generator
eee
apanastcr,
Chroma,
Collector
PLL
:Phase
Locked
Loop
CAP
:Capstan
PREM.OET
:Premire
Detect
abun
:Capstan
Brake
oe
pearly
“AP.
:Capst
}
cart
eee
on
Reverse
PWM
‘Pulse
Width
Moduiation
CBA
‘Circuit
Board
Assembiy
PWR
CTL
:Power
Control
ccD
:Charge
Coupled
Device
@ @
‘Transistor
C.CTL
:Chro
Control,
Gapstan
Control
QH
‘Quasi
Horizontal
CFG
:Capstan
Frequency
Generator
QsR
:Quick
Set
Record
CHROMA
‘Chrominance
QTR
‘Quick
Timer
Record
CNR
:Chroma
Noise
Reduction
Qv
{Quasi
Vertical
COMB
porration
R
REL
ac)
deen
ight
mo
Filter
or
:Remocon,
Receiver
COMP
:Comparator
REC
‘Recording
Composite
REC
S:'H"
:Record
Start
‘Hight’
Compensation
REF
:Aleterence
CONV
Converter
REG
‘Regulated,
Regulator
C.ROT
SW
:Color
Rotary
Switch
REMOCON
Remote
Control(unit)
cs
:Chip
Select
RFE
:Radio
Frequency
C.SYNC
:Composite
Synchronization
RP
‘Record/Playback
CTL
OW
:Conto!
Dwide
RTC
‘Resi
Time
Counter
CUR
:Current
s
5
7Sanial
CYL
:Cylinder
S.ACCEL
:Slow
Accel
12)
5
rum,
Digital,
Diodes
Drain
SAOP
:Second
Audio
Program
D.ADU
:Orum
Adjust
sc
+Scart,
Simutcast
oc
:Direct
Current
S.DET
‘Secam
Detect
O.CTL
:Drum
Controt
SH
:Shift
DEMOD
‘Demodulator
SHARP
:Sharpness
OET
‘Detect
SIF
:Sound
Intermediate
Frequency
bald
‘Devation
-
aa
:Side
Locking
‘Double
High
Pass
:Signal
to
Noise
Ratio
DIGITRON
‘Digital
Display
Tube
SP
‘Stender
Play
:Deiay
Line
ST
:Stereo
boc
:Drop
Out
Compensator
SUB
Subtract,
Subcarrier
DUB
‘Dubbing
SW
or
SW
‘Switch
D.V
SYNC
:Dummy
Vertica!
Synchronization
SYNG
:Synchronization
&
“Emitier
SYSCON
:Systam
Control
EE
Electric
to
Electric
Tord
ro)
7
EMPH
:Emphasis
Te
:Test
Point
ENA
:Enable
TR
‘Transistor
ENV
‘Envelope
TRK
‘Tracking
EP
:Extenced
Play
TRANS
‘Transformer
EQ
:Equalizer
TU
:Tuner,
Take-Up
EXP
:Expander
U
UHF
‘Ultra
Hight
Frequency
F
a
ee
UNREG
{Unregulated
:Feed
Back
v
5
ve
Fac
:Feed
Back
Ciamp
VA
‘vous
sive”
”
re
:Full
Erase
vco.
:Voltage
Controlled
Oscillator
fe
‘Frequency
Generator
VGC
:Voltage
Gain
Controt
é
‘Fitter
VHF
‘Very
High
Frequency
Hi
Frequency
Modulation
V.H.SW
:Video
Head
Switch
fe
:Forward/Reverse
:
viSS :VHS
Index
Search
System
Fsc
‘Frequency
Synthesizer
VPS
:Video
Program
System
oh
:Subcarrier
Frequency
VR
:Variable
Resistor
or
Volume
‘Frequency
Voltage
V-SYNC
‘Vertical
Synchronization
GC
GER
enero
VTG
‘Voltage
H
Hq
ligh,
Horizontal
w
Video
to
Video
'
ie
intergrated
Circuit
w
WO
_______Notiage
Xtal
Qsclistor
one
jo
X-ta!
Oscillator
Intermediate
Fr
ae
INS
insert
tes
WHT
nite
L
L
cLow,
Left,
Coit
WO
with
Out
LD
cLoading
X
X-TAL
Crystal
LOVTG
CTL
‘Loading
Voltage
Contro}
Y
VE
‘Luminance/Chrominance
LECHA
‘Letter
Character
YNR
:Luminance
Noise
Reduction
LM
-Leve!
Meter
Zz
:Zener
Diode
Goldstar
20
one
Diode
LP
sLong
Play
q@
4
1-2
IMPORTANT
SAFETY
PRECAUTIONS
Prior
to
shipment
from
the
factory,
the
products
are
strictly
inspected
to
conform
with
the
recognized
product
safety
and
electrical
codes
of
the
countries
in
which
they
are
to
be
sold.
However,
in
order
to
maintain
such
compliance,
it
is
equally
important
to
implement
the
following
precautions
when
a
set
is
being
serviced.
*
Precautions
during
Servicing
1.
Locations
requiring
special
caution
are
denoted
by
labels
and
inscriptions
on
the
cabinet,
chassis
and
certain
parts
of
the
product.
When
performing
service,
be
sure
to
read
and
comply
with
these
and
other
cautionary
notices
appearing
in
the
operation
and
service
manuals.
2.
Parts
identified
by
the
A\
symbol
and
shaded
(
§%)
parts
are
critical
for
safety
Replace
only
with
specified
part
numbers.
Note:
Parts
in
this
category
also
include
those
specified
to
comply
with
X-ray
emission
standards
for
products
using
cathode
ray
tubes
and
those
specified
for
compliance
with
various
regulations
regarding
spurious
radiation
‘hehe
§~
5.
When
replacing
AC
primary
side
components
(trans-
Fig.
1
formers,
power
cords,
noise
blocking
capacitors,
etc.)
wrap
ends
of
wires
securely
about
the
termin-
als
before
soldering.{Fig.
1)
3.
Use
Specified
internal
wiring.
Note
especially:
1)
Wires
covered
with
PVC
tubing
2)
Double
insulated
wires
3)
High
voltage
leads
4.Use
specified
insulating
materials
for
hazardous
live
parts.
Note
especially:
1)
Insulation
Tape
2)
PVC
tubing
3)
Spacers
4)
Insulation
sheets
for
transistor
6.
Observe
that
wires
do
not
contact
heat
producing
parts
(heatsinks,
oxide
metal
film
resistors,
fusible
resistors,
;
etc.)
Power
cord
7.
Check
that
replaced
wires
do
not
contact
sharp
edged
or
pointed
parts
8.When
a
power
cord
has
been
replaced,
check
that
10-15Kg
of
force
in
any
direction
will
not
loosen
it{Fig.
2)
Fig.
2
9.
Also
check
areas
surrounding
repaired
locations.
10.
Products
using
cathode
ray
tubes
(CRTs)
In
regard
to
such
products,
the
cathode
ray
tubes
themselves,
the
high
voltage
circuits,
and
related
circuits
are
specified
for
compliance
with
recognized
codes
pertaining
to
X-ray
emission.
Consequently.
when
servicing
these
Products,
replace
the
cathode
ray
tubes
and
other
parts
with
only
the
parts
specified.
Under
no
circumstances
attempt
to
modify
these
circuits.
Unauthorized
modification
can
increase
the
high
voltage
value
and
cause
X-ray
emission
from
the
cathode
ray
tube.
Goldstar
SAFETY
CHECK
AFTER
SERVICING
Examine
the
area
surrounding
the
repaired
location
for
damage
or
deterioration.
Observe
that
screws,
parts
and
wires
have
been
returned
to
original
positions.
Afterwards,
perform
the
following
tests
and
confirm
the
specified
values
in
order
to
verify
compliance
with
safety
standards.
¢
Insulation
resistance
test
Confirm
the
specified
insulation
resistance
or
greater
between
power
cord
plug
prongs
and
externally
exposed
parts
of
the
set
(RF
terminals,
antenna
terminals,
video
and
audio
input
and
output
terminals,
microphone
jacks,
earphone
jacks,
etc.).
See
table
below.
*
Dielectric
strength
test
Confirm
specified
dielectric
strength
or
greater
between
power
cord
plug
Prongs
and
exposed
accessible
parts
of
the
set{RF
terminals,
antenna
terminals,
video
and
audio
input
and
output
terminais,
microphone
jacks,
earphone
jacks,
etc.).
See
table
below
d
Primary
circuit
terminals
Chassis
a
Fig.
3
¢
Clearance
distance
When
replacing
primary
circuit
components,
confirm
specified
clearance
distance
(d),
(d'})
between
sol-
dered
terminals,
and
between
terminals
and
sur-
rounding
metallic
parts.
See
table
below
Table
1:Ratings
for
selected
areas
7
Insulation
Dielectric
Clearance
Al
ees
Veins)
eis
aren
|:
aeeagee
|
obama
*110
to
130
V
Europe
<
;
=
6mmid)
*Class
If
model
only.
Note.
This
table
is
unofficial
and
for
reference
only.
Be
sure
to
confirm
the
precise
values
for
your
particular
country
and
locality
*
Leakage
Current
test
Confirm
specified
or
lower
leakage
current
between
Bilearth
ground.
power
cord
plug
prongs)
and
externally
exposed
accessible
parts
(RF
terminals,
antenna
terminals,
video
and
audio
input
and
output
terminals,
microphone
Jacks,
earphone
jacks,
etc.)
Measuring
Method:
(Power
ON)
soncguls
Insert
load
Z
between
Blearth
ground,
power
cord
part
plug
prongs)
and
exposed
accessibie
parts.
Use
an
AC
voltmeter
to
measure
across
both
terminais
of
load
Z.
See
figure
and
foilowing
table
AC
Voltmeter
(high
impedance)
Earth
Ground,
Power
cord
plug
prongs
B
Fig.
4
Earth
Ground
Leakage
Current(i)
(B)
to:
i20.7m
A
peak
Antenna
earth
terminals
Table
2:Leakage
current
ratings
for
selected
areas
AC
Line
Voltage
Region
100
to
130
V
Europe
iS2m
A
de
i=0.7m
A
peak
:
200
to
240
V
Australia
:
her
terminal
i
12m
A
de
Other
inals
Note.
This
table
is
unofficial
and
for
reference
only.
Be
sure
to
confirm
the
precise
values
for
your
particular
country
and
locality.
Goldstar
FEATURES
@
HQ
(High
Quality)
picture
enhancement
system
that
improves
picture
sharpness
and
detail.
@
Centre
tape
mechanism
for
high
quality
pictures.
@
Full
function
infra-red
remote
control
handset.
@
Programmable
80
channel
memory
with
voltage
synthesised
tuner.
|;
@
ACMS
(Automatic
Channel
Memory
System)
the
channels
will
be
preset
automatically.
:
¥&
8
event/1
month
programmable
timer.
Built-in
ShowView
programming.
:
Recording
and
playback
for
16:9
Wide-screen
format.
Double
speed
playback.
Auto
Power
on
and
Play.
Automatic
Rewind.
LP
-
Long
Play
-
recording
and
playback.
*
Self
diagonostic
function.
Shuttle
Controls.
Logic
&
Jet
Search.
:
VISS
-
VHS
Index
Search
System.
:
*
Child
Lock.
Auto
Head
Cleaner.
Fine
stili,
Frame
advance
&
Variable
Slow
functions.
|
Real
Time
Counter
&
Remaining
tape
time
display.
|
Quick
Start
function.
Digital
Auto
Tracking
System.
Reception
of
PAUSECAM
B/G.
Recording
and
playback
in
PAL
and
SECAM.
CANAL+
Compatible
:
VPS
-
Video
programme
system
:
%*
:
Optional!
Function
i
*¥@e@eee0o39e0e3e0e0eeee
©
@
SPECIFICATIONS
Power
Power
consumption
Video
recording
system
Tape
speed
Tape
format
Maximum
recording
time
Rewind
time
Dimensions
(W
x
H
x
D)
Weight
Operating
temperature
Operating
humidity
Timer
VIDEO
Television
system
Recording
format
|
RF
reception
RF
OUT
Input
level
Output
level
Signal
to
noise
ratio
RF
modulator
AUDIO
Input
level
Output
level
Audio
track
Audio
frequency
response
Audio
signa!
to
noise
ratio
GENERAL
:
AC100-240V(SMPS),
50Hz.
:
Approx.
20
watts
:
Double
azimuth
4heads,
helical
scanning
system
:
23.39
mm/sec
(SP
mode)/t
1.69
mm/sec
(LP
mode)
:
Tape
width
1/2"
(12.7
mm
high
density
VHS
tape)
:
4
hours
in
SP
mode/8
hours
in
LP
mode
(with
E-240
tape)
:
Approx.150
sec.
(with
E-180
tape)
2
14,2°x3.5"x12"
(360x88x305
mm)
:
9.9lbs.
(4.5
kg)
>
41°F-95°F
(5-35)
:
Less
than
80%
:
24
hours
display
type
:
CCIR
standard
(6285
lines,
50
fields)
:
PAUMESECAM
:
PAL/
SECAM
(B/G,
D/K)
:
PAL
G/SECAM
K
:
VIDEO
IN
(Scart
type)
:
VIDEO
OUT
(Scart
type)
:
More
than
43
dB
:
UHF
Channels
30-40
(adjustable)
:
AUDIO
IN
(Scart
type)
:
AUDIO
OUT
(Scart
type)
:
Mono
track
:
100
Hz-10
kHz
(-6/+3)
:
More
than
43
dB
x
Design
and
specifications
are
subject
to
change
without
notice.
PAL/SECAM
colour
signal
1.0
Vp-p,
75
ohm,
unbalanced
1.0
Vp-p,
75
ohm,
unbalanced
0
dBm,
more
than
10Kohm
0
dBm,
less
than
1Kohm
Goldstar
1,
OPERATE
2.
STOP/EJECT
3.
VIDEO
CASSETTE
COMPARTMENT
4.
REMOTE
CONTROL
SENSOR
5.
REC/QSR
6.
PLAY
(x2)
7.
PAUSE/STILL
8.
MULTI
FUNCTION
DISPLAY
9.
CHANNEL
PROGRAMME
SELECTORS
10.
REWIND/REVIEW
11.
FAST
FORWARD/CUE
1.
MAINS
LEAD
2.
AUDIO/VIDEO
3.
VIDEO
CHANNEL
CONTROL
Goldstar
4.
AERIAL
INPUT
5.
RF.OUT
SECTION
2
CABINET
&
MAIN
FRAME
SERVICE
METHOD
1.
Electrical
Service
Fixture
List
The
Fixture
uses
in
Deck
Ass'y
Checking.
1)
Fixture
Cable
@
(Fix.1)
Parts
No:
6871R-0288A
(Optional
Parts)
FOR
Capstan
C.B.A
2)
Fixture
Cable
@
(Fix.2)
Parts
No:
6871R-0288B
(Optional
Parts)
FOR
DRUM
1.
OPERATE
2.
CURSORS
(A
V¢
))
3.
OK
4,
REWIND/REVIEW
5.
PLAY(X2)
6
7
8
9
FOR
MAIN
C.B.A
.
STOP
.
PAUSE/STILL
.
VISS
.
NUMBER
BUTTONS
10.
TV/VCR
11.
EJECT
BUTTON
12.
i
(MENU)
:
&
13,
FAST
FORWARD/CUE
14.
REC/QSR
15.
CHILD
LOCK
16.
AUDIO/VIDEO
MODE
:
&
17.
CLOCK/TAPE
COUNTER/TAPE
REMAINING
18.
CLEAR
19.
TAPE
SPEED
SELECT
(LP):
®
20.
AUTOMATIC
TRACKING
21.
SHOWVIEW
:
x
3)
Fixture
Cable
@
(Fix.3)
Parts
No:
6871R-0288C
(Optional
Parts)
4)
Fixture
Cable
@
(Fix.4)
Parts
No:
6871R-0288D
(Optional
Parts)
FOR
DECK
5)
Fixture
Cable
6)
(Fix.5)
Parts
No:
6871R-0288E
(Optional
Parts)
FOR
MAIN
C.B.A
Mechanism
7)
Fixture
Cable
@
(Fix.7)
Parts
No:
6871R-0288J
(Optional
Parts)
-
Goldstar
Goldstar
SERVICE
METHOD
2.
SERVICE
FIXTURE
CONNECTING
METHOD
1)
Check
and
Replace
of
The
Electrica!
Parts
»
Disassembly
Flow
(DTepcase
@
Front
Panel
Ly}
@
Timer
C.B.A
>
Giiaaeaa
easy)
a.
Refer
to
pages
2-4,
2-5
for
Disassembling.
b.
Assemble
inversely
like
figure
2-2,
and
check
the
electrical
Parts.
*
Notes
in
Check
@
Insert
Video
Cassette
Tape
inversely.
©
In
disassembling
and
assembling,
be
careful
not
to
damage
CST
Switch.
&
Power
Ass'y
||
©
Main
C.B.A
1>
MAIN
C.B.A
POWER
(SMPS)
ASS'Y
©
CASSETTE
TAPE
TIMER
C.B.A
Goldstar
SERVICE
METHOD
2)
Check
and
Replace
of
The
Deck
Ass'y
>
[&
Top
Case
|
2:
Front
Panel
Disassembly
Flow
BTimer
C.B.A
|
>|
Housing
&
Deck
Assy}
G
Power Ass'y
[>|
G)
Main
C.B.A
a.
b.
*
a
(asia
(o}
Adicts
Goldstar
Refer
to
pages
2-4,
2-5
for
Disassembling.
Assemble
like
figure
2-3,
and
connect
with
fixture
GEA.
Notes
in
Check
Short
W323
and
W278
of
Main
C.B.A
so
that
the
End
sensor
(Supply
sensor,
Take
up
sensor)
and
supply
Reel
Sensor,
Take
up
Reel
Sensor
are
not
operating.
insert
Video
Cassette
Tape
while
pushing
CST
switch.
After
Eject
the
cassette,
you
must
push
CST
switch
immediately.
In
disassembling
and
assembling,
be
careful
not
to
damage
CST
Switch.
In
reassembling.
you
must
open
W323,
W278.
When
Fix.
2,
Fix.
3.
Fix.
@
will
be
connect,
connect
the
blue
color
line
with
accord
as
like
the
Fig.
2-3.
IDENTIFICATION
JACK
C.BA
\F
CBA
nat
MAIN
C.B.A
TIMER
C.B.A
W278.W323
Vi
POWER
(SMPS)
ASS'Y
HOUSING
&
DECK
ASS'Y
CABINET
DISASSEMBLY
>»
Disassembly
Flow
TD
Top
Case
{2
Front
Panel
{3
Housing
Ass'y
be
Deck
Ass'y
5:
Power
Ass'y
be
Main
C.B.A
|>
1.
Top
Case
(
2
i
a
(A)
ara
ea
@)
&
@)
3.
Front
Panel
*
Caution
(Fig.
2-6)
2-4
1.
Top
Case
(Fig.
2-3)
1-1)
Release
4
screws
(A).
1-2)
Lift
the
Top
Case
by
holding
the
back
and
remove
it
in
the
direction
of
the
arrow.
2.
Bottom
Cover
(Fig.
2-4)
2-1)
Remove
7
screws
(B)
and
Bottom
Cover.
3.
Front
Panel
(Fig.
2-5)
3-1)
Remove
the
Top
Case.
3-2)
Remove
the
Bottom
Conver.
3-3)
Release
the
7
stoppers
of
the
Top,
Battom
and
side
of
the
front
panel
(C)
in
the
direction
of
the
arrows.
%*
Caution
(Fig.
2-6)
When
reassembie
the
front
panel,
assemble
it
in
condition
of
inserting
the
Door
Cassette
inside,
as
shown
in
Fig.
2-6.
Goldstar
CIRCUIT
BOARD
DISASSEMBLY
1.
Housing
and
Deck
Ass'y
(C)
Bracket
(D)"
Housing
Ass'y
<2
(E)
<
e
4.
Deck
Ass'y
Sas
Z
tee
ae
ae
Saree
ai
os
*
(Fig.
2-7)
ower
Ass'y
Power
Ass'
STOPPERS
(Fig.
2-10)
Goldstar
1.
Housing
and
Deck
Ass'y
(Fig.
2-7)
1-1)
Remove
the
Front
Panel.
1-2)
Remove
2
screws
(C)
of
the
Bracket.
1-3)
Remove
2
screws
(D)
and
disassemble
the
housing.
1-4)
Remove
3
screws
(E)
and
disassemble
the
deck.
2.
Power
Ass'y
(Fig.
2-8)
2-1)
Remove
2
screws
(F).
2-2)
Lift
up
the
power
Ass'y
in
the
direction
of
the
arrow.
3.
Timer
Circuit
Board
(Fig.
2-9)
3-1)
Pull
the
timer
circuit
board
toward
you
while
pressing
8
stoppers
in
the
direction
of
the
arrows
to
disengage,
and
remove
the
timer
circuit
board.
3-2)
Remove
the
connector
for
complete
removal.
4.
Main
Circuit
Board
(Fig.
2-10)
4-1)
Remove
1
holder
C.B.A.
4-2)
Remove
2
screws
(G).
4-3)
Pressing
4
stoppers
in
the
direction
of
the
small
arrows
and
lift
up
the
main
circuit
board.
2-5
-
Cabinet
&
Main
Frame
Section
DESCRIPTION
SPECIFICATION
ASSEMBLY
PARTS
SECTION
258-799K
3501R-0278T
501-520E
3501
R-0499C
PANEL
BOARD
ASSY
MODULE
BOARD
ASSY
217-5700
315-347B
324-9954
321-738A
255-429A
255-359A
255-362A
321-743A
340-086A
258-807E
226-1002
442-681
681-054A
681-254A
CASE
FRAME
HOLDER
BRACKET
PLATE
PLATE
PLATE
BRACKET
HOLDER
PARTS
SECTION
ASSY
FRONT
SMPS
PRE-AMP
MAIN
TOP
MAIN(60HR)
PWS
ASSY
HOUSING
GNO(M/F)
SIDE
GND
PRE-AMP
GND
PROTECT
DIGITRON(R-P40P'S)
FRONT
CST
DOOR
KKP-419C(PAL)
TERMINAL
TYPE
EP-11
LTFE-2F
(PAL)
TERMINAL
ASSY
DISTRIBUTOR
BOTTOM
SPECIAL(3X10
FZMY)
SPECIAL(4.6X12.5
FBK)
SPECIAL
(3X10
B.
Goldstar
EXPLODED
VIEWS
6
1.
Cabinet
&
Mainframe
Section
NOTE)
Refer
to
“SECTION
5
REPLACEMENT
PARTS
LIST”
in
order
to
look
for
the
part
number
of
each
part.
is
the
optional
parts
by
the
Models.
A00
A20
A4&
A44
A45
A46
PBT
00
PBI
00
PBJ
00
PBAFC
PBM
00
RC
601
TU
701
JK
901
JK
902
250
260
265
266
267
268
269
275
280
282
283
284
287
288
300
320
325
330
LOCATION
GUIDE
A3
A4
C1
Ds
G5
H3
D1
G3
G3
F2
G2
D2
G3
G3
Ga
F5
F4
D4
cs
E4
C4
D4
E2
C2
B1
B3
D2
c2
C4
D5
|
H4
Ga
G2
2-7
2-8
F
EXPLODED
VIEWS
-*
2.
Packing
&
Accessory
Section
3.
Remote
Control
Section
NOTE)
Refer
to
"SECTION
5
REPLACEMENT
PARTS
LIST"
in
order
to
look
for
the
part
number
of
each
part.
GD
A
T
i
PORTE
SEN
Eee
@O®
INSTRUCTION
ASS‘Y
BATTERY
=
(Optional
Paris)
“_
PACKING
ASS'Y
BOTTOM
(M3)
FILTER
(M3)
BATTERY
(M3)
BATTERY-A
D20
L6.0
MSWR3/(BK)
INSTRUCTION
ASSY
;
900
BOX
CARTON
901
PACKING
902
SHEET
CUSHION
903
RUBBER-A
(M3)
BATTERY
AAAM(RO3)
1.5V
904
RUBBER-B(M3)
CABLE
SET
ASSY
RF-CABLE,ASSY,PAL
905
M3
R/C
NORMAL
906
907
908
909
wo
=
oO
2-9
2-10
SECTION
3
ELECTRICAL
ELECTRICAL
ADJUSTMENT
PROCEDURES
ELECTRICAL
ADJUSTMENT
PROCEDURES
2.
Audio
Circuit
Purpose:
1)
Record
Bias
Adjustment
This
is
adjusting
the
bias
current
to
specification
in
Electronic
Test
Equipment
recording.
:
2
:
*
MODE:
Record
Procedure:
*
Oscilloscope
*
Recording
Tape
“SPEC
:
3.0mV+0.1mV
RMS
a.
Connect
(+)
terminal
of
the
Level
Meter
to
W108
(+).
+
Video
Signal
Generator
+
Digital
Multimeter
*M.P
>
W105
(+)
b.
Connect
(-)
terminal
of
the
Level
Meter
to
W106
(-),
+
Level
Meter
*
Monitor
Scope
W106
(-)
c.
Confirm
that
the
Oscillation
Voltage
is
3.0mV+
i
.
.
:
0.1mV
RMS.
+
Driver
Power
Supply
AP
:VP401
d.
At
this
time,
adjust
VR401
and
make
the
oscillation
*
Test
Tape
(SP)
voltage
fit
to
specification.
ABBREVIATIONS
3.
Tuner/IF
Circuit
Procedure:
*
SPEC:
Specification
+M.P:
Measurement
Point
+
A.P:
Adjustment
Point
1.
Servo
Circuit
1-1)
Record
PG
Adjustment
1)
VCO
(Voltage
Controlled
Oscillation)
Adjustment
*
MODE:
PAL
B/G
(38.9MHz)
a.
Connect
as
shown
in
Fig.
3-2.
b.
Input
the
PAL
B/G
38.9MHz
(Strength
of
input
electric
field:
75+
5SdBu)
signal
Out
Terminal
of
TV
,
Procedure:
*
SPEC
:
DC
2.5=0.1V
RF
Pattern
GEN
instrument.
1)
PG
Adjustment
a.
Set
the
VCR
to
AV
mode.
*M.P
—
:
P7MO2
pin@
(AFC
CTL)
c.
Confirm
that
the
video
signal
is
Output
by
connect
Purpose:
b.
Connect
CH-1
terminal
of
oscilloscope
to
TP302
*A.P
:
7750
AFC
oscilloscope
to
P7MO1
@PIN.
For
the
phase.dividing
of
the
Video
A,B
heads
tone
Gee
to
video
out
terminai
(Automatic
Frequency
Control)
d.
Adjust
VCO
coil
T750
so
that
the
voltage
of
P7M02
.
*
‘
pin
1D)
o'
‘ :
4
with
180
and
the
exact
tracing
of
each
track
to
c.
Input
the
Video
signal
to
Video
Input
Jack.
(VCO
COIL)
pin®
became
DC
2520.1.
meet
head
switching
point
with
VHS
Spec.
d.
Record
in
PAL
SP
mode.
e.
Trigger
the
complex
Video
signal
of
CH2
to
CH-1
({H.SW),
and
adjust
VR502
so
that
the
distance
n
ti
Marerony
oe
;
from
A(B)
head
selection
point
of
H.SW
signal
to
Connection
omposite
Video
Signal
the
starting
point
of
Vertical
synchronized
signal
is
(12+0.1V)
(5+0.1V)
Pattern
wep
——
416
=
50usec
Digital
Voltmeter
DC
Power
1
DC
Power
2
Oscilloscope
TV
RF
Generator.
i
=
Reference:
|
|
|
|f—
“tone
+
:
1.
Record
PG
Adjustment
is
proceed
in
the
Record
|
(4
[J
hee
|
ul
LJ
nn
OR
mode
and
must
be
input
video
signal.
input
GND
Power souce
GND
Power
source
GND
°
©
°
o
|
|
3.
The
deviation
between
the
specification
of
|
adjustment
and
the
practical
measurement
value
should
be
within
+
50usec.
|
2.
The
deviation
between
A/B
Head
Adjustment
location
should
be
within
+
0.5H
(32usec).
4.
Oscilloscope
and
VCR
set
should
be
connected
with
GND.
5.
When
the
Power
Ass'y
of
set
is
changed,
you
!
|
should
be
readjust
Record
PG.
a
vy
Y
i
bo}
loigl
'2:'3'4!'516.7,8)
|
SSH
aigisee)
1-2)
Playback
PG
Adjustment
j
(112/13
4/516)
7)
8)
[1.2:3'41516:7/8|
|
:
Procedure:
:
|
P7M02
fe)
|
P7M01
!
i.
a.
Playback
a
PAL
SP
test
tape.
ce.
|
Fig.
3-1
b.
At
this
time,
the
"ATR'
is
lighting,
after
pressing
750
|
—
the
A.TR
(+)
or
A.TR(-)
and
adjust
the
X-Vatue.
CO
ADJ
c.
Connect
CH-1
ee
of
oscilloscope
to
?
mw
)
TP302(H.SW)
and
CH-2
terminal
to
Video
Out
H
|
i
;
1-1)
Record
PG
Adjustment
terminal
(JK701
pin)
of
VCR.
|
t
d.
Trigger
the
compiex
Video
signal
of
CH2
to
CH-
a2.
IC750
i
i
:
1(H.SW),
and
adjust
VR501
so
that
the
distance
‘
y)
2
}
*
MODE:
Record
|
from
A(B)
head
selection
point
of
H.SW
signal
to
|
.
o-
:
bas
:
oe
the
starting
point
of
Vertical
synchronized
signal
is
j
|
|
y
°M.
:
2
i
6.5H
(416usec,
1H=
64sec).
!
a
me
JK701
Pind
‘Video
Out)
e.
The
conversion
of
A/B
Head
SW
signal
uses
the
Fig.
3-2
(IF
C.
B.A
Solder
side);
“AP
>
VR502
Polarity
Invert
Knob
of
oscilloscope.
Refere
2)
RF
AGC
(Automatic
Gain
Control)
Adjustment
Procedure:
:
eference:
i
i
lectri
1-2)Playback
PG
Adjustment
1.
=PG
adjustment
is
proceed
in
the
state
of
a
ai
ee
PAL
TICH
(strength
of
input
electric
maximum
RF
level
and
locked
servo
system
(MTR
*
MODE:
EE
11CH
ield:
70
+
tdBu).
ir
3
Mode).
*
SPEC
:6.020.1Vp-p
b.
Connect
the
Digital
Voltmeter
to
Tuner
AGC
PIN.
‘
MODE:
Playback
2.
The
deviation
between
A/B
Head
Adjustment
*M.P
=
W393
c.
Adjust
VR701
so
that
the
digital
voltmeter
is
6.0
~
*
SPEC
:
6.5H=0.5H
location
should
be
within
~0.5H
(32usec).
“AP:
VR701
0.1V
p-p.
(416usec,
1H=64usec)
3.
The
deviation
between
the
specification
of
:
.
*M.P
:
TP302
(H.SW)
adjustment
and
the
practical
measurement
value
F
JK701
pin‘T:
(Video
Out)
should
be
within
+0.5H
(32usec).
Reference:
sa
ctaae
"AP
:VR501
4.
Oscilloscope
and
VCR
set
should
be
connected
Maintain
the
input
gain
in
adjusting
AGC
faithfully.
with
GND.
rn
rey
cr
ree
eee
eee
a
Goldstar
Goldstar
3-1
32
BLOCK
DIAGRAMS
1.
Power
(SMPS)
Block
Diagram
RPO
act
RECTIFIER)
i
OP13
;
RP14
peat}
SNUBBER
BRIDGE
rE
CP06
OPO1
BLOCK
]
RECTIFIEB
RECTIFIER
OP12
cL)
le
JRECTIFIER
OP10
0513
D512
]
AC
LUNE
3-3
3-4
2.
Jack
Block
Diagram
TU
_WOEO
FROM
TUNER:
TO
audio
T_AudDIO
TU
AUDIO
ADJ
LPF
JK901
VPS
OPTION
EURO
AVI
filers
iar
a
As
oe ee
—
—
4
|
ics02
|
Md
———____—_,___|=_@
}
SDAS649
iC903
GL3816
:
an
RG.
OOOO)
|
moan
6
.
eaae
eel
es
|
l
OPTION:
SCART
®
‘SUCER
1)
rs
a
°
|
2)
©
@
|
@
©
pase
tate
cto
wee
[>
—
bd
@
|
IC904
EURO
1,2
INPUT
SELECT
|
|
LA7222
(AUDIO,
DEO)
furo
Ave
aan
|
@
Cr
|
=)
|
wst
2
OPTION:
tscartt
TO
AUDIO
12)
:
@
|
eles
@
fs.
Siete,
lca,
Piscean
ees
ee
tl
oe
SS
>
ess
2
©
OPTION:
2SCART
bie
es
el
ee
Oe
ae
FROM
SYSTEM
3
[wre
[>
fo)
a
C904
?
z
BUFFER
FROM
VIDEO
3
<j
woe
|
teed
95.06.19
b7—757b
3-6
3.
Servo/Syscon
&
Audio
&
Tuner
&
IF
Block
Diagrams
*
Servo/Syscon
MODE
S/W.
C.Rotary
)——»|
REC.
TAB
i
(8)
OSC10SC2
X1
x2
SW501
R549
x501
x502
X503
10.0MHz
32.768KHz
17.73MHz
3-64
TO/FROM
Y/C,
PRE-AMP
PMDO1
fe,
OFG
|
LIT
D.PG
|
PMO
02
PMD
01
[s]O.cTL
|
PMD
02
(3.
CFG
|
TO/
FROM
VPS,
AUDIO
TO/
FROM
TUAF
reset
!C504
4
(3)
ND
@)
cs00
+
Vec
(SYS
)
D505
=
L505
D500
—
.
>
6VA
mr
C503
LS03
TO
+
C505
0501
*
Audio
SV
OPTION
1
2
SCART
JACK
BOARD
EURO
1/@)
1C904
|
|
TUNER
AUDIO
Be
ool
@
@
|
|
DECORDER
AUDIO
MUTE"H'
SWITCHING
=
EURO
2
@
BA7797
@
me
@
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ae
TUNER"H’
VW/EE
OPTION
3
OPTION
2
1
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SCART)
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:
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FOR
|
ONLY
7OKHZ
REC
BIAS
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\V
MOD.
AUDIO
L.P.F
5-
5B
3-E6B
TPG
SW
IF
BM
AFC
BU
BH
NC
NC
ee
ee
ee
es
ee
es
ee
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VIDEO
AUDIO
RF
BB
swt
IN
NN
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AGC
|
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|
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(WE
—
|
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i
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a
ae
|
swrot
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al
Cp
NN
|
©)
=z
|
PAL
G
|
(OPTION)
FROM
u-COM
IC701
LA7910
FROM/TO
IF
33VA
POWER
SOURCE
EE
CONSTANT
VOLTAGE
STABILIZATION
r
PM701
CN
DT
[Tu
VIDEO
[2
>
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oe
4
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AUDIO_[41
:
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AGC
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STS
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TO
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aud
FROM/TO
IF
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FROM
u-COM
-
SECAMH
11]
SECAM
iH
]
SECAM
Vi"
OS
(SCAM
VW)
—
|
RF_AGC
ADJ,
e}<}}-——_—+
Icom
[AFC
GIL
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eva
eet
TUNER
ron
PO
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3VA
[7]
DUE.
UOITACE
(lava)
[GND
je}—~4
AGC
ADJUSTMENT
|
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FROM
w=
Cow
FROM
POWER
3-7
3-8
*
IF
Block
Diagram
1750
2752/2754
2751/2753
vco
SIF
Wer
H
SIF
ADJUSTMENT
TRAP
B.P.F
Aas
chee
PRE-AMP
FROM
MAIN
Q750
(PM701)
|
Lf
cs
|
uence
|
2755
|
foes
eal
SPECIFICATION
:
TRAP
i
he~<
BUFFER
&
NOISE
2750
'
CLIPPIN
K2955M
[a
—
SAW~FILTER
prt.
cs
T
&
p|
DEO
AMP
mine
oer
ef
SS
COLOR
PEAKING
DEEMPHASIS
FROM
MAIN
(PM702)
BUFFER
|
Q751
95.09.01
B7-756D/G
4.
Y/C
Block
Diagram
C
Res
5.308
OPTION:
SECAM
IC306
LA7356
BA7207S
OPTION:
SECAM
—,
IC302
LA7415
'95.08.18
B7-755A/D
3-11
3-12
3-13
3-14
CIRCUIT
DIAGRAMS
ete
4.
Power
(SMPS)
Circuit
Diagram
SS
BDPO1,RPO1
ore
defective.
FEPO1,RPO4
are
defective.
DP13
is
defective.
Not
switched.
Not
switching.
oy
Notes)
1.The
components
identified
by
mork
“INS
are
critical
for
safety.
2.Warring:
Parts
that
are
shaded
are
critical
with
respect
to
risk
of
fire
and
electrical
shock.
Symbol
denotes
earth
ground.
Symbol
denotes
DC
chassis
ground.
cP22
470u/25V
2.7
(20)
(CEMENT)
-
ood
BPO.
-S1WBABO
DP12,DP10
are
defective.
Can*t
see
the
Digitron
lighting.
DP10
CP21
14
47u/25V
o
EUOIW
001
1SS131
22
DPO8
is
defective.
Switching
is
abnormal.
PS2561-1-
(/PC123F)
95.07.08
7
-
752B
*
OPTION
:
CE
, : ;
FPO1
is
defective.
ICPO1
is
defective.
ICP02,ICPO3
are
defective.
Not
switching
or
switching
is
abnormal.
Switching
is
abnormal.
A
3-15
3-16
2.
Jack
Circuit
Diagram
IC903
is
defective.
an
rena
eta
Ae
eee
Con't
see
visual
signal.
NO
sound
signal
output.
|
NO
visual signal
output.
|
visual
signal
output.
|
Sound
signal output
is
small.
|
signal
output
is
small.
o>
VIDEO
OUT
SIGNAL
8
™
VIDEO
IN
SIGNAL
e>
AUDIO
IN
SIGNAL
=
AUDIO
OUT
SIGNAL
LOCATION
GUIDE
FROM
MAIN
]
ugoz)
|
|*
[°
|
[|
---------------------------
VIDEO
GNO
CU
Tu_VIDEO
os
TU
AUDIO
47u/16V
EURO
AV1
Tu
AUDIO
ADJ
AUDIO/L_AUDIO
JK901
AUDIO
AV2
VIDEO
TP
C926
22
(a)
oO
oO
z
z
o
im)
falslels]=[sfolo]~fofo[=[e]s]~)
Avi_MDEO
TP
IC90?
SDA5649
FROM
MAIN
(PM901)
ph
!
!
!
I
!
!
l
|
H
'
!
|
!
i
i
|
|
|
!
!
!
|
!
Il
[AVE
AUDIO
TP
[it
+
+
Psxo
ft
avi
AuDIO_T
[sp
reece
yl
|
|
P7¢_DATA/EU2™HIS
|
ae
Poros}
Z
[769
Ppp}
e
N
[Tuner
“Hof
+}
——J
og
Pw]
See
on
@|§
VPS/POC
SDA
2}
eB
2
[eno
t+
SAEs
REG
12VA_|14]
s
8
[scart
“HF
_[r3
aE
G)
i
@)
tot
fective.
Led
s
defectiv
Unwprking
transfer
TV
t@
AV
mode.
§)
c928
220p
8)
OOo
&
i
2SCART
OPTION
_
95.06.15
7-—757B
3-17
3-18
Table of contents
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