Orion MD17 User manual

SERVICE MANUAL
Design and specifications are subject to change without notice.
COLOR TELEVISION/VIDEO CASSETTE RECORDER
MD17
ORIGINAL
MFR’S VERSION A
PAL

SERVICING NOTICES ON CHECKING
6. AVOID AN X-RAY1. 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
Earphone Jack
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

CONTENTS
SERVICING NOTICES ON CHECKING.....................................................................................
HOW TO ORDER PARTS ..........................................................................................................
CONTENTS .................................................................................................................................
GENERAL SPECIFICATIONS....................................................................................................
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS............................................
2. REMOVAL OF DECK PARTS............................................................................................
3. REMOVAL OF ANODE CAP..............................................................................................
KEY TO ABBREVIATIONS ........................................................................................................
SERVICE MODE LIST ................................................................................................................
PREVENTIVE CHECKS AND SERVICE INTERVALS..............................................................
NOTE FOR THE REPLACING OF MEMORY IC .......................................................................
NOTE FOR THE REPLACING OF CHROMA IC .......................................................................
SERVICING FIXTURES AND TOOLS .......................................................................................
PREPARATION FOR SERVICING.............................................................................................
MECHANICAL ADJUSTMENTS ................................................................................................
ELECTRICAL ADJUSTMENTS..................................................................................................
BLOCK DIAGRAMS
TV ............................................................................................................................................
Y/C/AUDIO/HEAD AMP/SECAM CHROMA/HI-FI ..................................................................
MICON/OPERATION/POWER/DECK....................................................................................
21PIN/IN/OUT/T'TEXT ............................................................................................................
PRINTED CIRCUIT BOARDS
OPERATION/DECK.................................................................................................................
MAIN/CRT/POWER SW..........................................................................................................
SYSCON ..................................................................................................................................
SCHEMATIC DIAGRAMS
Y/C/AUDIO/HEAD AMP ..........................................................................................................
MICON .....................................................................................................................................
POWER ...................................................................................................................................
21PIN/IN/OUT..........................................................................................................................
CHROMA .................................................................................................................................
SOUND AMP ...........................................................................................................................
T'TEXT .....................................................................................................................................
SECAM CHROMA/HI-FI ..........................................................................................................
TV POWER..............................................................................................................................
DEFLECTION ..........................................................................................................................
CRT ..........................................................................................................................................
OPERATION............................................................................................................................
DECK .......................................................................................................................................
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
C1-1, C1-2
C2-1
C3-1, C3-2
C4-1
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-4
F-5~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
G-25, G-26
G-27, G-28
H-1, H-3
I-1, I-2
I-3, I-4
J1-1
J2-1
J3-1~J3-3
A2-1

GENERAL SPECIFICATIONS
G-1 TV CRT CRT Size / Visual Size 14 inch / 335.4mmV
System CRT Type Normal
Deflection 90 degree
Magnetic Field BV/BH +0.45G/0.18G
Color System PAL/SECAM orMonochroma signal
Speaker 1Speaker
Position Front
Size 1.5 x 2.5 Inch
Impedance 8 ohm
Sound Output MAX 1.5W
10%(Typical) 1W
G-2 VCR System VHS
System Player / Recorder
Video System PAL/SECAM
Hi-Fi STEREO No
NTSC PB Yes
Deck DECK OVD-6S
Loading System Front
Motor 3
Heads Video Head 2 Head
FM Audio Head No
Audio /Control Mono / Yes
Erase(Full Track Erase) Yes
Tape Rec PAL/SECAM SP
Speed NTSC -
Play PAL SP
NTSC SP
Fast Forward / Rewind Time (Approx.) FF:1'48"/REW:1'48"
Cassette at E-180
Forward/Reverse NTSC or PAL-M SP=3x,5x
Picture Search PAL or SECAM SP=5x,7x
Frame Advance Slow 1/10
Slow Speed Variable Slow 1/5~1/30
G-3 Tuning Broadcasting System CCIR,French System B/G,L
System Tuner and System 1Tuner
Receive CH Destination CCIR Hyper,France CATV
Tuning System F-Synth
Input Impedance VHF/UHF 75 ohm
CH Coverage (SECAM) F2~F4, FB~FQ, F21~F69
(PAL) E2~E4, X~Z+2,
S
1~
S
10,
E
5
~E12
,S
11~
S
41
,
E21~E
69
Intermediate Frequency PAL/SECAM(U&VH)/SECAM(VL)
Picture(FP) 38.9/38.9/34.4MHz
Sound(FS) 33.4/32.4/40.9MHz
FP-FS 5.5/6.5/6.5MHZ
Preset CH 80CH
Stereo/Dual TV Sound No
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) 53 dB
Horizontal Resolution at SP Mode 240 Lines
Audio Signal Input Level -3.8dB/50Kohm
Output Level -3.8dB/1Kohm
S/N Ratio at SP 42 dB
Harmonic Distortion (1KHz) 1.5 %
Frequency Response at SP 100Hz ~10kHz
at LP -
at SLP -
Hi-Fi Audio Signal Dynamic Range : More than -
Wow And Flutter : Less than -
Channel Separation : More than -
Harmonic Distortion : Less than -
G-5 Power Power Source AC 230V 50Hz
DC -
Power Consumption at AC 55 W at 230 V 50 Hz
at DC -
Stand by (at AC) 6 W at 230 V 50 Hz
Per Year -
Protector Power Fuse Yes
Dew Sensor No
G-6 Regulation Safety CE
Radiation CE
X-Radiation NONE
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
Scene Repeat 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 Yes
CH/AV Yes
Tape Counter(Linear Counter) Yes
Tape Speed No
Sleep Time Yes
Control Volume Yes
Level Bright / Contrast / Sharpness/ Color Yes
Tint No
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 Yes
Index Yes
Mute Yes
Hi-Fi No
Repeat Yes
Zero Return No
PAL/SECAM Yes
Dew No
G-10 OSD Language Eng Ger Fre Spa Ita
OSD Language Setting Fre
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
OTPB Valid Time -
Sleep Timer Max Time 120 min.
Step 10 min.
On/Off Timer Program(On Tim / Off Tim) 1 prog.
Auto Shut Off No Signal 15 min.
No Operation - min.
Timer Back-up (at Power Off Mode) 30 min.
A3-2