Hitachi CK-200 User manual

CAUTION:
Before servicing this chassis, it is important that the
“Product Safety Notices’” in this Service Manual.
service technician read the ‘’Safety Precaution” and
This service manaul shows only essential items.
Our compiete service manual inciuding “‘alignment proce-
dure’, ‘printed wiring boards” and ‘“‘technical information”
are issued by manual No. 615.
CONTENTS
SPECIE IGA MOS: gy ieee alec eid ee w ew aed epee |
BAPERY:PRECAU TIONG ty acs be dae ete eee 2
SRO Wl SAE TY NWOLNGES 3:3 ca wie a i esa eae So
GONE RGMES: «i uctee G effate eee brite hak a ee a py ee
TECHNICAL CAUTIONS ® 2 eh elacats woe ee yp key 4
CHASSIS’SERVICE-INFORMATION. «0.5.44 6 255. 8
DISASSEMBCING PAVs BOARDS ce oe ow keke es Be
LOCATION. OFTADSUS IMENT IPOIN-G 24 2 .atayee es 2
VULNS DAG BB et i he di ee we ey een ag mee oe 1D
PRINGCED: WIRLNGS: BOARD * 2 oy erence eee SS ate TT
BASIC. CRROULP DIAGRAM i. a ely a ete ee we ele o OD
REPLACEMENT PARTS 1S 6.. g.ck etek ee ae ee ee DE
SPECIFICATIONS
ANTENNA
INPUT
IMPEDANCE
......
30002
and
7502
CONVERGENCE
................
Self
convergence
TELEVISION
R-F
FREQUENCY
RANGE
POC Gi
wi
Ae
irl
ieee
ea oY
wee
p
ot
eo
Ee OPOST
aga
All
2:
VHF:-Channels:
8
sees
BAMHZ:
to
8B8EMHz
PICTURE
AUBE
Seber:
fe
LAE
Dy
eee
a
er
EOUAY
B22
174MHz
to 216MHz
SOUNDSOUTPU
TP
tie
oe
ee i. 2
200mW,
400H
Zz
All
70
UHF
Channels)
..
2...
2...
470MHz
to
890MHz
CBE
MICE
Race
og
tunts
Pe
ely
Give
Mee
Lom
ease
INTERMEDIATE
FREQUENCIES
TRANSISFORS
SS
SEES
Tye
a
ei
ee
ae
Po BO
Picture
1.F
Carrier Frequency...
soe
2
457
oMHz
TO
Denis a
eek
ee
ae
en gk
ee
ase
ae
a
fia
ee OG
Sound:I-F
Carrier
Frequency
oe
oe
oe 47.
25MAz
HOS
either
at tee
PON he
Oe oe
Fees
OD
Sound:
|-PaPreauency
ee
cir
SA
A
MZ
DIMENSIONS
“(Wye
bree
eo
Sue
ov
oe
30.4em
Color
Sub-Carrter:
Frequency...
oe
3
SBMHZ
Lye
Fat
2s
Beals
Se
ye
SE
oem
POWERSINPUT
oe
are
AGC
120V-60HZ;
DE
12V
(DES
i
DS
Ses
be ee
ee
LOM
POWER:-RATING
Vo.
oreo
2
ON
ne
oy
ee
ACT
2
OW
WEIGH
Fs
HES
Oe
Shoe
eee
ata
at
3
Appreaiokg
DC: 15W

CK-200
SAFETY PRECAUTIONS
NOTICE: Comply with all cautions and safety related
notes located on or inside the cabinet and on the chassis
or picture tube.
WARNING: Since the chassis of this receiver is connected
to one side of AC power supply during operation, whenever
the receiver is plugged in, service should not be attempted
by anyone unfamiliar with the precautions necessary when
working on this type of receiver.
The following precautions should be observed:
1. Do not install, remove, or handle the picture tube in any
manner unless shatterproof goggles are worn. People not
so equipped should be kept away while picture tubes are
handled. Keep picture tube awya from the body while
handling.
2. When replacing a chassis in the receiver, all the pro-
tective devices must be put back in place, such as barriers,
non-metallic knobs, adjustment and compartment cover-
shields, isolation resistor-capacitor, etc.
Oo
. When service is required, observe the original jead dress.
Extra precaution should be taken to assure correct lead
dress in the high voltage circuitry area.
4. Always use the manufacturer's replacement components.
Especially critical components as indicated on the circuit
diagram should not be replaced by other manufacturer's.
Furthermore where a short circuit has occurred, replace
those components that indicate evidence of overheating.
5. Before returning a serviced receiver to the customer, the
service technician must thoroughly test the unit to be
certain that it is completely safe to operate without
danger of electrical shock, and be sure that no protective
device built into the receiver by the manufacturer has
become defective, or inadvertently defeated during
servicing.
Therefore, the following checks should be performed for
the continued protection of the customer and service
technician.
Leakage Current Cold Check
With the AC plug removed from the 120V AC 60Hz
source, place a jumper across the two plug prongs. Turn
the AC power switch on. Using an insulation tester (DC
500V), connect one lead to the jumpered AC plug and
touch the other lead to each exposed metal part
(antennas, screwheads, metal overlays, control shafts,
etc.}, particularly any exposed metal part having a return
Path to the chassis. Exposed metal parts having a return
Path to the chassis should have a minimum resistor
reading of 0.3M2 and a maximum resistor reading of
5MoQ2. Any resistor value below or above this range
indicates an abnormality which requires corrective
action. Exposed metal parts not having a return path to
the chassis will indicate an open circuit.
Leakage Current Hot Check
Plug the AC line cord directly into a 120V AC 60Hz
outlet (do not use an isolation transformer for this
check). Turn the AC power swtich on. Using a ‘leakage
Current Tester (Simpson Model 229 equivalent)’’, mea-
sure for current from al! exposed metal parts of the
cabinet (antennas, screwheads, metal overlays, control
shaft, etc.), particularly any exposed meta! part having a
return path to the chassis, to a known earth ground
{water pipe, conduit, etc.). Any current measured must
not exceed 0.5mA.
(READING SHOULD
NOT BE ABOVE
O5mA}
LEAKAGE
CURRENT
TESTER
DEVICE
UNDER
TEST
TEST ALL
EXPOSED METAL
SURFACES
2-WIRE CORO
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
5
TH
PLUG
AS
REQUIRED)
EAR
GROUND
AC Leakage Test
ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A POTEN-
TIAL SHOCK HAZARD AND MUST BE CORRECTED
BEFORE RETURNING THE RECEIVER TO THE CUS-
TOMER.
High Voltage
This receiver is provided with a hold down circuit for
clearly indicating that voltage has increased in excess of
a predetermined value. Comply with all notes described
in this Service Manual regarding this hold donw circuit
when servicing, so that this hold down circuit may
correctly be operated.
Serviceman warning
With minimum Brightness and Contrast, operating hix
voltage in this receiver is lower than 16.0KV. In case
any component having influence on high voltage is
replaced, confirm that high voltage with minimum
Brightness and Contrast is lower than 16.0KV.
\
f
on rtp my is, cian ast cp ses Adee Cahir has acne a Sp Stik WMA mt Bia tart a) ns ok Nn ARE ESP Bieta Pon Sr taht Sa Late nk hr A Ache Plas
SEE Sake nL ae: ATEN UA A sca i a
oer
at aia aie TN Se EH 2
MERTON Ga RA carb Heep Re Maal naitaped laure rate st Ke tetenbime wa
“ata AE AE ITAA MY i EN RCTS Ml BE REA Foren
Aten anal Fite 2 Weal mere

CK-200
To
measure
H.V.
use
a
high
impedance
H.V.
meter.
Connect
(—)
to
chassis
earth
and
(+)
to
the
CRT
anode
button.
(See
the
following
connection
diagram).
PRODUCT SAFETY NOTICE
Many
electrical
and
mechanical
parts
in
HITACHI
television
receiver
have
special
safetyrelated
character-
istics.
These
are
often
not
evident
from
visual
inspection
nor
can
the
protection
afforded
by
them
necessarily
be
obtained
by
using
replacement
components
rated
for
higher
voltage,
wattage,
etc.
Replacement
parts
which
have
these
special
safety
characteristics
are
identified
in
this Service Manual.
Electrical
components
having
such
features
are
identified
by
marking
with
a
A
on
the
schematics
and
on
the
parts
list in this Service Manual.
The
use
of
a
substitute
replacement
component
which
does
not
have
the
same
safety
characteristics
as
the
HITACHI
recommended
replacement
one,
shown
|
parts
list
in
this
Service
Manual,
may
create
shock,
fire,
X-radiation, or other hazards.
-
NOTE:
Turn
power
switch
off
without
fail
before
the
connection
with
Anode
button
is
made.
CRT ANODE
HIGH IMPEDANCE
H.V, METER CHASSIS GROUND
X-radiation
TUBE: The primary source of X radiation in this
Product
Safety
is
continuously
under
review
and
new
instructions
are
issued
from
time
to
time.
For
the
latest
receiver is the picture tube. The tube utilized for the
above mentioned function in this chassis is specially
constructed to limit X radiation emissions.
For continued X radiation protection, the replacement
information,
always
consult
the
current
HITACHI
Ser-
vice
Manual.
A
subscription
to,
or
additional
copies
of,
HITACHI
Service
Manual
may
be
obtained
at
a
nominal
charge
from
HITACHI
SALES
CORPORATION.
tube
must
be
the
same
type
as
the
original,
HITACHI
approved
type.
|
When
trouble
shooting
and
making
test
measurements
In
°
a
receiver
with
a
problem
of
excessive
high
voltage,
avoid
being
unnecessarily
close
to
the
picture
tube
and
the
high
voltage
component.
Do
not
operate
the
chassis
longer
than
ts
necessary
to
locate
the
cause
excessive
voltage.
CONTROLS
TELESCOPIC ANTENNA
CHANNEL SEARCH BUTTON (Ph)
rs CHANNEL SEARCH
“BUTTON (4)
CHANNEL RECALL BUTTON
-——-POWER SWITCH
“|
ee: BAND SELECTOR
| ey
c=
gl 74
—- BATTERY CASE
__EARPHONE & a |
“RECORDING JACK SPipoom ae VOLUME CONTROL
1 [fon AUTO/MANUAL BUTTON
Tp PINE TUNING KNOB
Le COLOR
Tee es
See = ee BRIGHTNESS
oe PICTURE

TECHNICAL CAUTIONS
[CHECK
OF
HIGH
VOLTAGE
HOLD
DOWN
CIRCUIT)
Step 1: Set the AC Input voltage to 13243V.
Step 2: Connect Equipment and H.V. meter as shown in
~ Fig. 1 and Fig. 2.
(Be sure that the control knob of Equipment is
rotated fully counterclockwise.)
Step 3: Turn the receiver on, (receive color-bar or white-
pattern) and rotate BRIGHTNESS COLOR AND
PICTURE VR TO MAXIMUM.
Step 4: Slowly rotate the control knob of Equipment
CRT ANODE
clockwise
and
confirm
that
picture
on
the
screen
Se
naic
Naas
disappears
at
the
indication
of
H.V.
meter
less
_
EHASS!s
GHOUNY
than
17.5KV.
Step
5:
Turn
the
receiver
off,
and
disconnect
Equipment
Fig.
2
CONNECTION
OF
H.V.
METER
and H.V. meter.
~ SOUND/POWER PW.B.
we (CUPPER PATTERN SIDE)
EQUIPMENT
VR IKN-B
3
(p
Slowly rotate
clockwise
470N 410%
(1/4 W)
CHASSIS GROUND y
Fig. 1 CONNECTION OF EQUIPMENT

CK-200
CHASSIS
SERVICE
INFORMATION
UPPERCOVER
(1)
Disconnect
the
UHF
and
VHF
antenna
REMOVAL
cord
from
antenna
terminal.
(2) Remove four screws (1) at the both
side
of
uppercover.
rabibsite
(3}
Remove
three
screws
(2)
of
the
eee
ae
antenna
terminal
board.
;
aan
ai
(4)
Remove
two
screws(3)
at
the
topcover
|
atone
ee
th
—
{Both side of the cover)
TUNER
AND
SOUND/
(1)
Remove
two
screws
(4)
for
retaining
POWER
BLOCK
the
tuner
block
to
the
cabinet.
REMOVAL
(2)
Remove
four
screws
(5)
for
retaining
the
sound/power
block
to
the
cabinet.
T.V
P.W.
BOARD
(1)
Remove
two
screws
(6)
for
retaining
REMOVAL
the
T.V
P.W.
Board
to
the
cabtnet.
(2)
Unlock
the
T.V
P.W.
Board
(7).

CK-200
a
POWER
REGULATOR
(1)
Unsolder
each
leads
{emitter
and
SOUND
/
POWER
PWB.
=
TRANSISTOR (0901) base of Q901).
REMOVAL (2) Remove a screw (9) for retaining the
collector of Q901. a
38)
CUPPER
“ RATTERN SIDE
HORIZONTAL
OUTPUT
(1)
Unsolder
each
tead
(10
(emitter
and
Q702
TRS
HOLDER
TRANSISTOR
-
base
of
Q901)}.
/
/
HEAT
SINK
REMOVAL
(2}
Remove
two
screws
(1)
for
retaining
/
|
FOR
Q702
Q702 and its holder.
When re-assembling Q702, procedure
shall
be
followed
as
shown
in
Figure.
SS
oC
RT pszscaszion Bees
\ TV RWB.
WASHER
a
3
TUNER
REMOVAL
(1)
Unsolder
the
phono-plug
(2)
of
RF
—
TUNER
vo
coaxial cable from antenna terminal
board of the electronic tuner.
(2) Disconnect UHF feeder connector (3)
from antenna termina! board.
(3) Loosen two screws for retaining ;
;
;
5
the tuner to chasssi of tuner. ¥v : J f
(4)
Unsolder
terminal
board
(5)
and
Ne
chassis fixer of electronic tuner at
ee
the
tuner
P.W.B.
(Cupper
pattern
side).
|
TUNER
NOTE: When unsoldering. The chassis - S14)
FIXER of electronic tuner shall ™N——— CHASSIS OF TUNER
be straightened out.
TUNER PWB. :
—— TUNER
8)
CHASSIS FIXER OF
ELECTRONIC TUNER ;
ON.
(CUPPER PATTERN SIDE)

: CK-20C
DISASSEMBLING
CRT MODULE
(1) Rewind the pate (1)
(2) Untie the wire for fixing CRT module.
(3) Pull out CRT module from CRT-BASE.
When returning CRT module, pro-
cedure shall be followed as shown in
Figure.
PROCEDURE OF
CRT MODULE
MOUNTING
(1) Add the wire to the CRT module as
shown in Fig.
(2) Mount the CRT module to CRT after
tacking DY to original position on
CRT neck.
(3)
CRT
module
should
be
fixed
in
ac-
cordance
with
the
procedure
of
following
((2)~(4)).
(4) Check the CRT module should be
fixed completely to the CRT neck.
(1) WIRE SHOULD BE PASSED
THROUGH BETWEEN CERAMIC
PW.B. AND CRT SOCKET.
LEADS OF 71 AND Te.
(2) wiRE SHOULD BE TWISTED 3 OR 4 TIHES
SO THAT IT DOSE NOT LOOSEN.
CRT
(3) WIRE SHOULD BE HOOKED TO MODULE
SCREW FOR FIXING OF DY.
(4) ~’ PART OF WIRE SHOULD BE LIFTED UP
TO DIRECTION OF ARROW.
WIND THE TAPE 2 TIMES TO THE CRT
NECK AFTER TAPING TO FOCUS LEAD ONCE.

CK-200
DISASSEMBLING P.W. BOARDS
AUTO SEARCH PW.B.
CHANNEL RECALL. SWITCH:
CAN BE REMOVED, SO THAT UNFIXED RWB.
_ \ FOR RETAINING THE AUTO SEARCH RWB.
POWER SWITCH ~~~
SPEAKER
BR i stimcne 4
CAN BE SERVED AF TE!
A SCREW.
LOOSENING
POWER TRANSFORMER -——
SEE TV P.WB. REMOBAL [TV RW.B.
pe peter [SOUND/POWER PWB)
CAN BE SERVED AFTER REMOVING
SOUND/ POWER BLOCK AND POWER
TRANSFORMER
HOLDER FIXER
VOLUME
7 TUNER PW.B]]
CAN BE SERVED
AFTER REMOVING
TUNER BLOCK,
“1 TYNER
CRT MODULE
\
ANTENNA TERMINAL BOARD

CcK-200
LOCATION OF ADJUSTMENT POINT
SYNC, DISCRI.
SUB BRIGHT AGC VIDEO AMP
H.LINERITY
HLINERITY PwB_ | UC __1@
[COLOR SYNC.
PON CEN
Vv. LEFT
tU- EER
[H. HOLD
,
cs
SOUND/POWER
PW.B.
CRT
MODULE
CRT MODULE (BACK VIEW)
SCREEN
RED
DRIVE
BLUE
DRIVE
GREEN
AKG
RED
B.KG
BLUE B.K.G

WIRING DIAGRAM
POWER SUPPLY BLOCK
SOUND/ POWER
SUPPLY P.W.B
(J JVHF COAXIAL CABLE
ANTENNA TERMINA 30ARD
a
Pie
y
3