Schaub Lorenz SL0521KO User manual

COLORTELEVISION/VIDEO CASSETTE RECORDER
SERVICE MANUAL
Design and specifications are subject to change without notice.
SL0521KO
ORIGINAL
MFR’S VERSION A

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.
HOWTO 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

A1-2
1.
2.
3.
4.
5.
Remove the VCR block from the main unit.
(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)
Remove the screw 1of the Deck Chassis and remove the Loading Motor.
Rotate the Pinch Roller Cam in the direction of the arrow by hand to slacken the Video Tape.
Rotate the Clutch Ass'y either of the directions to wind the Video Tape in the Cassette Case.
Repeat the above step 3~4. Then take out the Video Cassette from the Deck Chassis. Be careful not to
scratch on the tape.
TAPE REMOVAL METHOD AT NO POWER SUPPLY
Pinch Roller Cam
Main Cam Clutch Ass'y
Main Chassis (Front Side)
Loading Motor
Screw 1
Capstan DD Unit

CONTENTS
SERVICING NOTICES ON CHECKING......................................................................................
HOW TO ORDER PARTS ...........................................................................................................
TAPE REMOVAL METHOD AT NO POWER SUPPLY .............................................................
CONTENTS ..................................................................................................................................
GENERAL SPECIFICATIONS....................................................................................................
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS.............................................
2. REMOVAL OF VCR 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...............................................................
WHEN REPLACING EEPROM (MEMORY) 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 .....................................................................................................................................
IF/21PIN/IN/OUT/OPERATION ..............................................................................................
T' TEXT....................................................................................................................................
PRINTED CIRCUIT BOARDS
MAIN/CRT/POWER SW ..........................................................................................................
MAIN/CRT ...............................................................................................................................
SYSCON..................................................................................................................................
OPERATION/IF ........................................................................................................................
SCHEMATIC DIAGRAMS
Y/C/AUDIO/HEAD AMP ...........................................................................................................
MICON ......................................................................................................................................
POWER ....................................................................................................................................
21PIN/IN/OUT...........................................................................................................................
CHROMA/IF.............................................................................................................................
SOUND AMP ............................................................................................................................
SECAM CHROMA/HI-FI ...........................................................................................................
REGULATOR............................................................................................................................
T'TEXT ......................................................................................................................................
TV POWER...............................................................................................................................
DEFLECTION...........................................................................................................................
CRT ..........................................................................................................................................
IF .............................................................................................................................................
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
A1-2
A2-1
A3-1~A3-5
B1-1, B1-2
B2-1~B2-6
B3-1
B4-1, B4-2
C1-1, C1-2
C2-1
C3-1, C3-2
C4-1
D1-1
D1-2
D2-1~D2-4
D3-1~D3-6
E-1, E-2
E-3, E-4
E-5, E-6
E-7, E-8
E-9, E-10
F-1, F-2
F-3, F-4
F-5~F-8
F-9, F-10
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
G-29, G-30
H-1~H-3
I1-1, I1-2
I2-1, I2-2
J1-1
J2-1
J3-1~J3-3
A2-1

GENERAL SPECIFICATIONS
G-1 TV CRT CRT Size / Visual Size 21 inch / 508.0mmV
System CRT Type Normal
Deflection 90 degree
Magnetic Field BV/BH +0.45G/0.18G
Color System PAL/SECAM
Speaker 1Speaker
Position Front
Size 3 Inch
Impedance 8 ohm
Sound Output MAX 2.5W
10%(Typical) 2.0W
G-2 VCR System VHS
System Player / Recorder
Video System PAL/SECAM
Hi-Fi STEREO No
NTSC PB(PAL60Hz) Yes
Deck DECK OVD-7
Loading System Front
Motor 3
Heads Video Head 4 Head
FM Audio Head No
Audio /Control Mono / Yes
Erase(Full Track Erase) Yes
Tape Rec PAL/SECAM SP/LP
Speed NTSC -
Play PAL/SECAM SP/LP
NTSC SP
Fast Forward / Rewind Time
(
Approx.
)
at+25oCFF:1'48"/REW:1'48"
Cassette at E-180
Forward/Reverse NTSC or PAL-M SP=3x,5x
Picture Search PAL or SECAM SP/LP=5x,7x / 7x,13x
Frame Advance Yes
Slow Speed 1/5~1/30
G-3 Tuning Broadcasting System CCIR,French System B/G,L
System Tuner and System 2Tuner
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, S1~S10,
E5~E12,S11~S41,E21~E69
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
Auto Tuning Method All Band (Not C.C.I.R. CH Plan)
Preset CH 80CH
Stereo/Dual TV Sound No
Tuner Sound Muting Yes
G-4 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 -3.8dBm/50Kohm
Output Level -3.8dBm/1Kohm
S/N Ratio at SP 42 dB
Harmonic Distortion at SP (1KHz)
Typical 1.5 %
Frequency Response at SP 100Hz ~10kHz
at LP 100Hz ~5kHz
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 -
A3-1

GENERAL SPECIFICATIONS
Power Consumption at AC 60 W at 230 V 50 Hz
at DC -
Stand by (at AC) 5 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 than 80% RH
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 Yes
Scene Repeat Yes
System Setup Yes
Clock Set Yes (Calendar 24h)
Language Yes
System Select No
G-CODE(or SHOWVIEW or PLUSCODE)No. Entry No
Stereo/Audio Output No
Bilingual No
NICAM No
Clock/Date Yes
CH/AV Yes
Tape Counter(Linear Counter) Yes
Tape Speed Yes
Sleep Time Yes
Control Volume Yes
Level Brightness / 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
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

GENERAL SPECIFICATIONS
G-12 Remote Unit RC-CH
Control Glow in Dark Remocon No
Power Source Voltage(D.C) 3V
UM size x pcs UM-4 x 2 pcs
Total Keys 41 Keys
Keys Power Yes
1 Yes
2 Yes
3 Yes
4 Yes
5 Yes
6 Yes
7 Yes
8 Yes
9 Yes
0/AV Yes
CH/Tr Up No
CH/Tr Up/Page Up Yes
CH/Tr Down No
CH/Tr Down /Page Down Yes
Volume Up Yes
Volume Down Yes
Play/Up No
Play/Up/Slow Yes
F.Fwd/Right Yes
Rew/Left Yes
Pause/Still Yes
Pause No
Stop/Down Yes
Rec/OTR Yes
Eject Yes
Counter Reset Yes
Speed Yes
Timer Rec Yes
TV Monitor No
TV Monitor /Rec Monitor Yes
Program Yes
Program /V+(ShowView) No
Auto Tracking No
Auto Tracking /Reveal Yes
Menu Yes
Enter No
Enter/Hold Yes
Cancel/Ch Skip No
Cancel/Ch Skip/F-T-B Yes
Index No
Index /Sub Page Yes
Call Yes
Text/Mix/TV Yes
Sleep Timer Yes
Mute Yes
Zero Return Yes
CM Skip No
OTPB No
END Call No
Red Yes
Cyan Yes
Green Yes
Yellow Yes
Audio Select No
G-13 Features Auto Head Cleaning No
Auto Tracking Yes
HQ (VHS Standard High Quality) Yes
Auto Power On, Auto Play, Auto Rewind, Auto Eject Yes
Auto Shut Off Yes
Auto Repeat Yes
VIDEO PLUS+(SHOWVIEW,G-CODE) No
CH Auto Set-Up/Auto Clock No
A3-3

GENERAL SPECIFICATIONS
Forward / Reverse Picture Search Yes
One Touch Playback No
Auto Tuning Yes
Anti-Theft No
End Call No
Index Search Yes
SQPB No
CATV Yes
CM Skip(30sec x 6 Times) No
Comb Filter No
T'Text Yes
Text type Fast Text
Scene Repeat Yes
Hotel Lock No
TV Monitor No
TV/Rec Monitor Yes
Zero Return Yes
Choke Coil No
Power On Memory No
G-14 Accessories Owner's Manual Language Italian
w/Guarantee Card No
Remote Control Unit Yes
Rod Antenna No
Poles -
Terminal -
w/300 ohm to 75 ohm Antenna Adapter -
Loop Antenna No
Terminal -
U/V Mixer No
DC Car Cord (Center+) No
Guarantee Card Yes
Warning Sheet No
Circuit Diagram No
Antenna Change Plug No
Service Facility List No
Important Safeguard No
Dew/AHC Caution Sheet No
AC Plug Adapter No
Quick Set-up Sheet No
Battery Yes
UM size x pcs UM-4 x 2 pcs
OEM Brand No
AC Cord No
AV Cord (2Pin-1Pin) No
21pin-RCA Cable No
Registration Card No
PTB Sheet No
Anti-Theft Sheet No
Euro Warranty Information Sheet No
G-15 Interface Switch Front Power Yes
Play Yes
Pause/Still No
System Select No
One Touch Playback No
Channel Up Yes
Channel Down Yes
F.FWD/Cue Yes
Eject/Stop Yes
Main Power SW Yes
Volume Up Yes
Volume Down Yes
Rew/Rev Yes
Rec/OTR Yes
Rear Main Power SW No
Indicator Standby Red
Rec/OTR Red
T-Rec Red
On Timer No
A3-4

GENERAL SPECIFICATIONS
CS No
Key Light up Rec/OTR No
One Touch Playback No
Play No
Terminals Front Video Input RCA x1
Audio Input RCA x1
Other Terminal Headphone(Stereo & Mono, 3.5mm)
Rear Video Input No
Audio Input No
Video Output No
Audio Output No
Euro Scart 1-SCART
Diversity No
Ext Speaker No
DC Jack 12V(Center +) No
VHF/UHF Antenna Input DIN type
AC Inlet No
G-16 Set Size Approx. W x D x H (mm) 502 x 486.5 x 513
G-17 Weight Net (Approx.) 22.0kg ( - lbs)
Gross (Approx.) 24.0kg ( - lbs)
G-18 Carton Master Carton No
Content -
Material -
Dimensions W x D x H(mm) -
Description of Origin -
Gift Box Yes
Material Double/Brown
Dimensions W x D x H(mm) 569 x 562 x 590
Design As per Buyer's
Description of Origin No
Drop Test Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces
Height (cm) 46
Container Stuffing(40' container) 332 Sets
G-19 Material Cabinet Front PS 94HB
Rear PS 94HB
Jack Panel PS 94HB
PCB Non-Halogen Demand No
Eyelet Demand No
A3-5

B1-1
Fig. 1-2
Front Cabinet CRT PCB
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS
AND P.C. Boards
1-4: MAIN PCB (Refer to Fig. 1-4)
1.
2.
3.
4.
5.
6.
7.
8.
Remove the screw (1).
Remove the Main PCB Holder.
Remove the screw (2).
Remove the TV PCB Holder.
Remove the 2 screws (3).
Remove the 3 screws (4).
Disconnect the following connectors:
(CP403, CP810 and CP820).
Remove the Main PCB in the direction of arrow.
Fig. 1-4
1-1: BACK CABINET (Refer to Fig. 1-1)
1.
2.
3.
4.
Remove the 6 screws (1).
Remove the 2 screws (2) which are used for holding the
Back Cabinet.
Remove the AC cord from the AC cord hook (3).
Remove the Back Cabinet in the direction of arrow.
1-2: CRT PCB (Refer to Fig. 1-2)
CAUTION: BEFORE REMOVING THE ANODE CAP,
DISCHARGE ELECTRICITY BECAUSE IT
CONTAINS HIGH VOLTAGE.
BEFORE ATTEMPTING TO REMOVE OR
REPAIR ANY PCB, UNPLUG THE POWER
CORD FROM THE AC SOURCE.
1.
2.
3.
Remove the Anode Cap.
(Refer to REMOVAL OF ANODE CAP)
Disconnect the following connectors:
(CP802 and CP850).
Remove the CRT PCB in the direction of arrow.
1-3: TV/VCR BLOCK (Refer to Fig. 1-3)
1.
2.
3.
4.
Remove the 2 screws (1).
Disconnect the following connectors:
(CP401, CP501, CP502, CP4202 and CP4203).
Unlock the support (2).
Remove the TV/VCR Block in the direction of arrow.
Fig. 1-3
(1)
Main PCB Holder
VCR Block
Main PCB (3) (4)
(3)
(4)
(4)
(2)
TV PCB Holder
Front Cabinet
UP TO
RELEASE
TV/VCR Block
(2)
(1)
(1)
Front Cabinet
Back Cabinet
(1)
(1)
(1)
(1) (2)
(1)
(2) (3)
(1)
Fig. 1-1

B1-2
DISASSEMBLY INSTRUCTIONS
1-5: DECK SHIELD PLATE (Refer to Fig. 1-5)
1.
2.
3.
4.
5.
6.
Remove the 2 screws (1).
Remove the 4 screws (2).
Remove the screw (3).
Remove the Deck Shield Plate in the direction of arrow (A).
Remove the 3 screws (4).
Remove the Shield Plate Bottom, Shield Plate Bottom (R),
Shield Plate Bottom (L) in the direction of arrow (B).
Fig. 1-7
1.
2.
3.
4.
5.
Remove the screw (1).
Remove the Syscon PCB in the direction of arrow (A).
Remove the 2 screws (2).
Unlock the 2 supports (3).
Remove the Jack Plate in the direction of arrow (B).
1-7: JACK PLATE AND SYSCON PCB (Refer to Fig. 1-7)
1-6: DECK CHASSIS (Refer to Fig. 1-6)
1.
2.
3.
Remove the 3 screws (1).
Disconnect the following connectors:
(CP1001, CP4001, CP4004 and CP4005).
Remove the Deck Chassis and AC Head Cover in the
direction of arrow.
Fig. 1-6
(1)
(1) (1)
Deck Chassis
Syscon PCB
AC Head Cover
Fig. 1-5
Deck Shield Plate
(1)
(1)
(A)
(3)
(2)
(2)
(2)
(2)
(4)
(4)
VCR Block
Shield Plate Bottom
(B)
(4)
Shield Plate Bottom (R)
Shield Plate
Bottom (L)
(A)
Jack Plate
(2)
(2)
(3)
(3)
(B)
Syscon PCB
(1)
Deck Holder