SERVICE MANUAL
COLOR TELEVISION/
VIDEO CASSETTE RECORDER
FILE NO. 140-200120
VTV21FL3
SERVICING NOTICES ON CHECKING
6. AVOID AN X-RAY
1. KEEP THE NOTICES
As for the places which need special attentions,
they are indicated with the labels or seals on the
cabinet, chassis and parts. Make sure to keep the
indications and notices in the operation manual.
3. USE THE DESIGNATED PARTS
5. TAKE CARE TO DEAL WITH THE
CATHODE-RAY TUBE
In the condition that an explosion-proof cathode-
ray tube is set in this equipment, safety is
secured against implosion. However, when
removing it or serving from backward, it is
dangerous to give a shock. Take enough care to
deal with it.
Safety is secured against an X-ray by consider-
ing about the cathode-ray tube and the high
voltage peripheral circuit, etc.
Therefore, when repairing the high voltage pe-
ripheral circuit, use the designated parts and
make sure not modify the circuit.
Repairing except indicates causes rising of high
voltage, and it emits an X-ray from the cathode-
ray tube.
Please include the following informations when you order parts. (Particularly the VERSION LETTER.)
1. MODEL NUMBER and VERSION LETTER
The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be
found at the end of the SERIAL NUMBER.
2. PART NO. and DESCRIPTION
You can find it in your SERVICE MANUAL.
HOW TO ORDER PARTS
PERFORM A SAFETY CHECK AFTER
SERVICING
7.
Confirm that the screws, parts and wiring which
were removed in order to service are put in the
original positions, or whether there are the
portions which are deteriorated around the
serviced places serviced or not. Check the
insulation between the antenna terminal or
external metal and the AC cord plug blades.
And be sure the safety of that.
(INSULATION CHECK PROCEDURE)
1.
2.
3.
4.
Unplug the plug from the AC outlet.
Remove the antenna terminal on TV and turn
on the TV.
Insulation resistance between the cord plug
terminals and the eternal exposure metal
[Note 2] should be more than 1M ohm by
using the 500V insulation resistance meter
[Note 1].
If the insulation resistance is less than 1M
ohm, the inspection repair should be
required.
[Note 1]
If you have not the 500V insulation
resistance meter, use a Tester.
[Note 2]
External exposure metal: Antenna terminal
2. AVOID AN ELECTRIC SHOCK
There is a high voltage part inside. Avoid an
electric shock while the electric current is
flowing.
The parts in this equipment have the specific
characters of incombustibility and withstand
voltage for safety. Therefore, the part which is
replaced should be used the part which has
the same character.
Especially as to the important parts for safety
which is indicated in the circuit diagram or the
table of parts as a
mark, the designated
parts must be used.
4. PUT PARTS AND WIRES IN THE
ORIGINAL POSITION AFTER
ASSEMBLING OR WIRING
There are parts which use the insulation
material such as a tube or tape for safety, or
which are assembled in the condition that
these do not contact with the printed board.
The inside wiring is designed not to get closer
to the pyrogenic parts and high voltage parts.
Therefore, put these parts in the original
positions.
A1-1
TABLE OF CONTENTS
SERVICING NOTICES ON CHECKING .....................................................................................
HOW TO ORDER PARTS ..........................................................................................................
TABLE OF CONTENTS ..............................................................................................................
GENERAL SPECIFICATIONS ...................................................................................................
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS ............................................
2. REMOVAL OF DECK PARTS ............................................................................................
3. REMOVAL OF ANODE CAP ..............................................................................................
4. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ...............................................
KEY TO ABBREVIATIONS ........................................................................................................
SERVICE MODE LIST ................................................................................................................
PREVENTIVE CHECKS AND SERVICE INTERVALS ..............................................................
NOTE FOR THE REPLACING OF MEMORY IC .......................................................................
SERVICING FIXTURES AND TOOLS .......................................................................................
PREPARATION FOR SERVICING .............................................................................................
MECHANICAL ADJUSTMENTS ................................................................................................
ELECTRICAL ADJUSTMENTS ..................................................................................................
BLOCK DIAGRAMS
TV ............................................................................................................................................
Y/C/AUDIO/CCD/HEAD AMP .................................................................................................
MICON/OPERATION ..............................................................................................................
21PIN/IN/OUT .........................................................................................................................
PRINTED CIRCUIT BOARDS
MAIN/CRT/POWER SW ..........................................................................................................
SYSCON/SUB POWER ..........................................................................................................
OPERATION ............................................................................................................................
SCHEMATIC DIAGRAMS
Y/C/AUDIO/CCD/HEAD AMP .................................................................................................
MICON .....................................................................................................................................
POWER ...................................................................................................................................
21PIN IN/OUT ..........................................................................................................................
CHROMA/IF .............................................................................................................................
SOUND AMP ...........................................................................................................................
REGULATOR ...........................................................................................................................
TV POWER ..............................................................................................................................
DEFLECTION ..........................................................................................................................
CRT ..........................................................................................................................................
OPERATION ............................................................................................................................
INTERCONNECTION DIAGRAM ...............................................................................................
WAVEFORMS .............................................................................................................................
MECHANICAL EXPLODED VIEWS ...........................................................................................
CHASSIS EXPLODED VIEWS ...................................................................................................
MECHANICAL REPLACEMENT PARTS LIST .........................................................................
CHASSIS REPLACEMENT PARTS LIST ..................................................................................
ELECTRICAL REPLACEMENT PARTS LIST ...........................................................................
A1-1
A1-1
A2-1
A3-1~A3-5
B1-1, B1-2
B2-1~B2-5
B3-1
B4-1, B4-2
C1-1, C1-2
C2-1
C3-1, C3-2
C4-1
C5-1
C5-2
D1-1~D1-4
D2-1~D2-7
E-1, E-2
E-3, E-4
E-5, E-6
E-7, E-8
F-1, F-2
F-3~F-6
F-7, F-8
G-1, G-2
G-3, G-4
G-5, G-6
G-7, G-8
G-9, G-10
G-11, G-12
G-13, G-14
G-15, G-16
G-17, G-18
G-19, G-20
G-21, G-22
G-23, G-24
H-1~H-3
I-1, I-2
I-3, I-4
J1-1
J2-1, J2-2
J3-1~J3-5
A2-1
GENERAL SPECIFICATIONS
G-1
TV
CRT
CRT Size / Visual Size
21inch
/ 508.0mmV
System
CRT Type
Flat
Deflection
90
degree
Magnetic Field
BV/BH
+0.35G
/ +0.30G
Color System
PAL/SECAM/NTSC(AV,PB,REC Only)
Speaker
2Speaker
Position
Front
Size
1.8 x 4.8 Inch
Impedance
8
ohm
Sound Output
MAX
1.5+1.5 W
10%(Typical)
1.2+1.2 W
G-2
VCR
System
VHS Player / Recorder
System
Video System
PAL/NTSC/MESECAM
Hi-Fi STEREO
No
NTSC PB
Yes
Deck
DECK
OVD-6S
Loading System
Front
Motor
3
Heads
Video Head
2Head
FM Audio Head
No
Audio /Control
Mono
/Yes
Erase(Full Track Erase)
Yes
Tape
Rec
PAL
SP/LP
Speed
NTSC(AV ONLY)
SP
Play
PAL
SP/LP
NTSC
SP
Fast Forward / Rewind Time (Approx.)
FF:1'48"/REW:1'48"
with Cassette
E-180
Forward/Reverse
NTSC or PAL-M
SP=3x,5x
Picture Search
PAL or SECAM
SP=5x,7x LP=7x,13x
Frame Advance
-
Slow Speed
-
G-3
Tuning
Broadcasting System
CCIR B/G,D/K
System
Tuner and
System
1Tuner
Receive CH
Destination
Oscar(W/ HYPER)
Tuning System
F-Synth
Input Impedance
VHF/UHF 75 ohm
E2~E4, X~Z+2, S1~S10,
E5~E12,S11~S41,E21~E69
Intermediate Fquency
BG/DK
Picture(FP)
38.9/38.9MHz
Sound(FS)
33.4/32.4MHz
FP-FS
5.5/6.5MHZ
Preset CH
110CH
Stereo/Dual TV Sound
No
Tuner Sound Muting
Yes
G-4
Signal
Video Signal
Input Level
1 V p-p/75 ohm
Output Level
1 V p-p/75 ohm
S/N Ratio (Weighted)
53dB
Horizontal Resolution at SP Mode
240Lines
Audio Signal
Input Level
-8dB/50Kohm
(0dB=0.775Vrms)
Output Level
-8dB/1Kohm
(0dB=0.775Vrms)
S/N Ratio at SP (Weighted)
42dB
Harmonic Distortion (1KHz)
1.5
%
Frequency Response
at SP
100Hz - 10kHz
at LP
100Hz - 5kHz
at SLP
100Hz - 4kHz
Hi-Fi Audio Signal
Dynamic Range : More than
75
dB
Wow And Flutter : Less than
0.01
%Wrms
Channel Separation : More than
60
dB
Harmonic Distortion : Less than
1.0
%
G-5
Power
Power Source
AC
110-240V,50/60Hz
DC
-
Power Consumption
at AC
70W
at 220V
50Hz
at DC
-
Stand by (at AC)
8W
at 220V
50Hz
Per Year
-
Protector
Power Fuse
Yes
Dew Sensor
No
G-6
Regulation
Safety
GOST/SISIR/IEC65
Radiation
GOST
X-Radiation
GOST/IEC65
G-7
Temperature
Operation
+5oC ~ +40oC
Storage
-20oC ~ +60oC
G-8
Operating Humidity
Less then 80% RH
A3-1
GENERAL SPECIFICATIONS
G-9
On Screen
Menu
Yes
Display
Menu
Type
Character
ATS
No
Timer Rec Set
Yes
Channel Setup
Yes
Auto Tuning
Yes
Ch Mapping
No
Ch Tuning
Yes
Ch Allocation
Yes
TV Setup
Yes
On/Off Timer Set
Yes
Picture
Yes
Audio
No
VCR Setup
Yes
Auto Repeat On/Off
Yes
System Select
No
Scene Repeat
No
NTSC Play Back Out
Yes
System Setup
Yes
Clock Set
Yes (Calendar 24h)
Language
Yes
System Select
Yes
G-CODE(or SHOWVIEW or PLUSCODE)No. Entry
No
Stereo/Audio Output
No
Bilingal
No
NICAM
No
Clock/Date
Yes
CH/AV
Yes
Tape Counter(Linear Counter)
Yes
Tape Speed
Yes
Sleep Time
Yes
Control
Volume
Yes
Level
Bright / Contrast / Sharpness/ Color
Yes
Tint(NTSC Only)
Yes
Bass/Treble/Balance
No
Manual Tracking
Yes
Play/Stop/FF/Rew/Rec/OTR/T-Rec/Pause/Eject/Tape In (Symbol Mark)
Yes
Auto Tracking/Manual Tracking
Yes
S-Repeat/SR-R/SR-PLAY
No
Index
Yes
Mute
Yes
Hi-Fi
No
Repeat
Yes
Zero Return
No
PAL/SECAM
No
Dew
No
G-10
OSD Language
English Russian
OSD Language Setting
English
G-11
Clock,Timer
Calendar
1990/1/1 ~ 2081/12/31
and Timer
Timer Events
8 prog/ 1 month
Back-up
One Touch Recording Max Time
SP 5 Hours ,LP 10 Hours
OTPB
Valid Time
-
Sleep Timer
Max Time
120
min.
Step
10
min.
On/Off Timer
Program(On Timer / Off Timer)
1
prog.
Auto Shut Off
No Signal
15
min.
No Operation
-
min.
Timer Back-up (at Power Off Mode)
30
min.
A3-2