Samsung SVR-433 User manual

ELECTRONICS
© Sarrsung Hectronics Co., Ltd. APR. 2000
Printed in Korea
/AAC68-00806A,
TWANVWIW JDIANSS
TET/TOEZ/ MOEZ/ BOEZ/EEZ/EED-UAS
SERVICE Manual
For rrecharical disassembly and adjustrrent, refer to the “Mechanical Manual” (DX-9R—> AC68-00001A).
LP ti
2. Alignmrert and Ac§ustrert
3. Exploded View and Parts List
4. Bectical Parts List
5 Schematic Diagrams

) IMPORTANT SERVICEGUIDE >}
MODE SWITCH (PROGRAM SWITCH) ASSEMBLY POINT
1) When installing the ass’y full deck on the M ain PCB, be sure to align the assembly point of mode switch.
Fig. 1
HOW TO EJ ECT THE CASSETTE TAPE
(If the unit does not operate on condition that tape is inserted into housing ass’y)
1) Remove the Holder Worm @ and the gear worm @. (See Fig. 2)
2) Turn the Gear Worm Wheel @ counterclockwise in the direction of arrow with screw driver. (See Fig. 2)
3) When Slider S, T are approached in the position of unloading, rotate holder Clutch counterclockwise after inserting screw driver in the
hole of frame's bottom in order to wind the unwounded tape. (Refer to Fig. 3)
(If you rotate Gear W orm Wheel continuously when tape is in state of unwinding, you may cause a tape contamination by grease and
tape damage. Be sure to wind the unwounded tape in the state of set horizontally.)
4) Rotate Gear Worm Wheel @ counterclockwise using screw driver again up to the state of eject mode and then pick out the tape.
(Refer to Fig. 2)
© GEAR WORM WHEEL
SCREW DRIVER
iao— HOLDER WORM
Fig. 2 Fig. 3

1, Precautions
1. Be sure that all of the built-in protective devices are
replaced. Restore any missing protective shields.
2. When reinstalling the chassis and its assemblies, be
sure to restore all protective devices, including :
control knobs and compartment covers.
3. Make sure that there are no cabinet openings
through which people--particularly children
--might insert fingers and contact dangerous
voltages. Such openings include the spacing
between the picture tube and the cabinet mask,
excessively wide cabinet ventilation slots, and
improperly fitted back covers.
If the measured resistance is less than 1.0 megohm
or greater than 5.2 megohms, an abnormality exists
that must be corrected before the unit is returned
to the customer.
4. Leakage Current Hot Check (See Fig. 1-1) :
Warning : Do not use an isolation transformer
during this test. Use a leakage current tester or a
metering system that complies with American
National Standards Institute (ANSI C101.1,
Leakage Current for Appliances), and Underwriters
Laboratories (UL Publication UL1410, 59.7).
5. With the unit completely reassembled, plug the AC
line cord directly the power outlet. With the unit’s
AC switch first in the ON position and then OFF,
measure the current between a known earth
ground (metal water pipe, conduit, etc.) and all
exposed metal parts, including : antennas, handle
brackets, metal cabinets, screwheads and control
shafts. The current measured should not exceed
0.5 milliamp. Reverse the power-plug prongs in the
AC outlet and repeat the test.
6. X-ray Limits :
The picture tube is designed to prohibit X-ray
emissions. To ensure continued X-ray protection,
replace the picture tube only with one that is the
same type as the original.
Samsung Electronics
(READING SHOULD
NOT BE ABOVE
0.5mA)
DEVICE
UNDER
TEST [LU
TEST ALL
EXPOSED METER
SURFACES
2-W IRE CORD
ALSO TEST WITH
PLUG
REVERSED
+
aROuG
(USING AC ADAPTER ies
PLUG AS REQUIRED)
Fig. 1-1 AC Leakage Test
7. Antenna Cold Check :
With the unit’s AC plug disconnected from the
AC source, connect an electrical jumper across the
two AC prongs. Connect one lead of the ohmmeter
to an AC prong.
Connect the other lead to the coaxial connector.
8. High Voltage Limit :
High voltage must be measured each time
servicing is done on the B+, horizontal deflection
or high voltage circuits.
Heed the high voltage limits. These include the
X-ray protection Specifications Label, and the
Product Safety and X-ray Warning Note on the
service data schematic.
9. Some semiconductor (“solid state”) devices are
easily damaged by static electricity.
Such components are called Electrostatically
Sensitive Devices (ESDs); examples include
integrated circuits and some field-effect transistors.
The following techniques will reduce the
occurrence of component damage caused by static
electricity.
10. Immediately before handling any semiconductor
components or assemblies, drain the electrostatic
charge from your body by touching a known
earth ground. Alternatively, wear a discharging
Wrist-strap device. (Be sure to remove it prior to
applying power--this is an electric shock
precaution.)
1-1

Precautions
11. High voltage is maintained within specified limits
by close-tolerance, safety-related components and
adjustments. If the high voltage exceeds the
specified limits, check each of the special
components.
12. Design Alteration Warning :
Never alter or add to the mechanical or electrical
design of this unit. Example : Do not add
auxiliary audio or video connectors.
Such alterations might create a safety hazard.
Also, any design changes or additions will void
the manufacturer’s warranty.
13. Hot Chassis Warning :
Some TV receiver chassis are electrically
connected directly to one conductor of the AC
power cord. If an isolation transformer is not
used, these units may be safely serviced only if
the AC power plug is inserted so that the chassis
is connected to the ground side of the AC source.
To confirm that the AC power plug is inserted
correctly, do the following : Using an AC
voltmeter, measure the voltage between the
chassis and a known earth ground. If the reading
is greater than 1.0V, remove the AC power plug,
reverse its polarity and reinsert. Re-measure the
voltage between the chassis and ground.
14. Some TV chassis are designed to operate with 85
volts AC between chassis and ground, regardless
of the AC plug polarity. These units can be safely
serviced only if an isolation transformer inserted
between the receiver and the power source.
15. Never defeat any of the B+ voltage interlocks.
Do not apply AC power to the unit (or any of its
assemblies) unless all solid-state heat sinks are
correctly installed.
16. Always connect a test instrument’s ground lead to
the instrument chassis ground before connecting
the positive lead; always remove the instrument's
ground lead last.
17. Observe the original lead dress, especially near
1-2
the following areas : Antenna wiring, sharp
edges, and especially the AC and high voltage
power supplies. Always inspect for pinched, out-
of-place, or frayed wiring. Do not change the
spacing between components and the printed
circuit board. Check the AC power cord for
damage. Make sure that leads and components
do not touch thermally hot parts.
18. Picture Tube Implosion Warning :
The picture tube in this receiver employs
“integral implosion” protection. To ensure
continued implosion protection, make sure that
the replacement picture tube is the same as the
original.
19. Do not remove, install or handle the picture tube
without first putting on shatterproof goggles
equipped with side shields. Never handle the
picture tube by its neck. Some “in-line” picture
tubes are equipped with a permanently attached
deflection yoke; do not try to remove such
“permanently attached” yokes from the picture
tube.
20. Product Safety Notice :
Some electrical and mechanical parts have special
safety-related characteristics which might not be
obvious from visual inspection. These safety
features and the protection they give might be
lost if the replacement component differs from the
original--even if the replacement is rated for
higher voltage, wattage, etc.
Components that are critical for safety are
indicated in the circuit diagram by shading,
(A\ or A\).
Use replacement components that have the same
ratings, especially for flame resistance and
dielectric strength specifications. A replacement
part that does not have the same safety
characteristics as the original might create shock,
fire or other hazards.
Samsung Electronics

2. Alignment and Adjustment
2-1 Reference
1) X-Point (Tracking center) adjustment, “Head switching adjustment” and “NVRAM option setting” can be adjusted with remote control.
2) When replacing the M icom (IC601) and NVRAM (IC605 ; EEPROM ) be sure to adjust the “Head switching adjustment” and
“NVRAM option setting”.
3) When replacing the cylinder ass’y, be sure to adjust the “X-Point” and “Head switching adjustment”.
4) Among Samsung VCR remote control used for adjustment as a accessory, only the remote control that has figures buttons (0 ~9) is
available for all adjustment regardless of chassis.
5) How to adjustment.
- Press the “SW718 (TEST)” button on Main PCB to set the adjustment mode.
- If the corresponding adjustment button is pressed, the adjustment is performed automatically.
- If the adjustment is completed, be sure to turn the power off.
2-1-1 Location of adjustment button of remote control
EJECT
1®
@SHUTTLE@
X-Point (Tracking Center) Adjustment
("5" Button)
9
G
U
D0
NVRAM Option Setting
("M ENU" Button)
Head Switching Adjustment
("SPEED" Button)
STANDBY/ON DISPLAY
CNT.RESET SPEED
<This type of remote control can adjust.> <This type of remote control can not adjust.>
Remote Control for adjustment is not supplied as a Service J ig.
Fig. 2-1
Samsung Electronics 2-1

Alignment and Adjustment
2-1-2 SW718 (TEST) location for adjustment mode setting
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Fig. 2-2 M ain PCB (Top View)
Samsung Electronics

2-2 Mechanical Adjustment
Alignment and Adjustment
Note : Refer to the Mechanical Manual “DX-9R (AC68-00001A)” for the adjustment and confirmation of
ass’y full deck.
2-2-1 The number and position of test point
Test point: TP601 (Control Pulse)
TP602 (H’D S/W -Trigger)
TP301 (Envelope)
TP302 (Audio output)
TP303 (Video output)
L AUDIO OUTPUT
o
TP602 HO SW
=a
1P302 A-OUT |
TP301 aw ENVELOPE
a
— [| HEAD SWITCHING
Fig. 2-3 Location of Test point (M ain PCB-Top View)
2-2-2 ACE Head Position (X-Point) Adjustment
(See the 2-2-1(d) ACE Head Position (X-Point) Adjustment
on page 2-2 of the Mechanical Manual)
1) Playback the alignment tape (Color bar).
2) Press the “SW718 (TEST)” button on Main PCB to
set the adjustment mode. (See Fig. 2-2)
3) Press the “5” button of remote control then
adjustment is operated automatically. (See Fig. 2-1)
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4) Connect the CH-1 probe to TP301 (Envelope) the
CH-2 probe to TP602 (H’D switching pulse) and
then trigger to CH-1.
5) Insert the (-) driver into the X-Point adjustment
hole and adjust it so that envelope waveform is
maximum.
6) Turn the Power off.
2-3

Alignment and Adjustment
2-3 Head Switching Point Adjustment
1) Playback the alignment tape.
2) Press the “SW718 (TEST)” button on Main PCB to set the adjustment mode. (See Fig. 2-2)
3) Press the “SPEED” button of remote control then adjustment is operated automatically. (See Fig. 2-1)
4) Turn the Power off.
2-4 NVRAM Option Setting
1) NVRAM Option is adjusted at production line basically.
2) In case Micom (IC601) and NVRAM (IC605 ; EEPROM) is replaced, be sure to set the corresponding option number of the repaired
model. (If the option is not set, the unit is not operated.)
1) Press the “SW718 (TEST)” button on Main PCB to set the adjustment mode. (See Fig. 2-2)
2) Press the “MENU” button on the remote control about 5 seconds then option setting display is appeared.
(See Fig. 2-4 and 2-5)
3) Select the option number (See Table 2-1 ; Page 2-5) of corresponding model with “FF” and “REW” button on
the remote control.
4) If selecting the option number is completed, press the “PLAY” button of remote control.
(If “PLAY” button is pressed, the selected number is changes reversed color. ; See Fig. 2-4 and 2-5)
5) Press the “OK (VCR)”, “MENU (VCP)” button of remote control again to store the option number.
(“PLEASE WAIT” is displayed for a second as shown Fig. 2-6, 2-7 and this setting is completed.)
6) Turn the Power off.
[> OPTION DIODE x x * OPTION DIODEX* _ |
>01 WA 03 04 [06 07 08 01 [A 03 04 GB 06 07 08
09 10 11 12 13 14 15 16 09 10 11 12 13 14 15 16
yee 1G) 00) i pe a 2 17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 32 25 26 27 28 29 30 31 32
33 34 35 36 37 38 39 40 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 41 42 43 44 45 46 47 48
49 50 51 52 53 54 55 56 49 50 51 52 53 54 55 56
| <>¥ CNG: a SAVE: OK | 4b ¥ CNG: 4 SAVE: CEM,
Fig. 2-4 (VCR) Fig. 2-5 (VCP)
| [xk OPTION DIODE x x i XX OPTION DIODEKk | |
01> 03 04 [A 06 07 08 01> 03 04 [I 06 07 08
09 10 11 12 13 14 15 16 09 10 11 12 13 14 15 16
eer Ge ly Mle 17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 32 25 26 27 28 29 30 31 32
33 34 35 36 37 38 39 40 33 34 35 36 37 38 39 40
1 2 43 44 45 46 47 M8 41 42 43 44 45 46 47 48
49 50 51 54 55 49 50.5 54 55 56
<— PLEASE WAIT > PLEASE WAIT >
|
<>
CNG:
SAVE:
|
(<<
CNG:
a
SAVE:
[EM
Fig. 2-6 (VCR) Fig. 2-7 (VCP)
2-4 Samsung Electronics

Alignment and Adjustment
<Table 2-1>
COUNTRY M ODELS OPTION NUMBER
RUSSIA SVR-433 6, 8, 11, 12, 17, 18, 22, 25, 30, 31, 32, 35, 41, 42, 45, 50, 54
SVR-233 6, 8, 11, 17, 18, 22, 25, 30, 31, 32, 34, 41, 42, 45, 50, 54
SVR-230B 8,11, 17, 18, 22, 25, 30, 31, 32, 34, 37, 38, 41, 42, 50, 54
SVR-230W 8,11, 17, 18, 22, 25, 30, 31, 32, 34, 37, 38, 41, 42, 50, 54
SVR-2301 8, 11, 17, 18, 22, 25, 30, 31, 32, 34, 37, 38, 42, 50, 54
SVR-131 8, 9, 10, 11, 17, 18, 22, 30, 31, 32, 34, 39, 42, 45
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2-5

Alignment and Adjustment
MEMO
2-6 Samsung Electronics