Samsung DVD-V85K User manual

DVD-VCR COMBINATION
Chassis : 3’nd Generation
DVD-V85K/V72K/V55K/V52K
DVD-V12500/V12000
DVD-V52
SV-DVD2EK
SERVICE
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Alignment and Adjustment
5. Troubleshooting
6. Exploded View and Parts List
7. Electrical Parts List
8. Block Diagram
9. PCB Diagrams
10. Schematic Diagrams
Manual
DVD-VCR COMBINATION CONTENTS
SERVICE MANUAL DVD-V85K/V72K/V55K/V52K/V52/V12500/V12000/SV-DVD2EK
© Samsung Electronics Co., Ltd. MAY. 2002
Printed in Korea
AK82-00212A
DVD-V85K/V72K/V55K/V52K
DVD-V12500/V12000/SV-DVD2EK
DVD-V52
STANDBY/ON
/I
REW PLAY F . F STOP REC
OPEN/CLOSE
VOLUME
ECHO
SELECT COPY
PROG
EJECT
MIC1 MIC2
STANDBY/ON
COPY VOLUME KEY CONTROL
ECHO MIC1 MIC2
REC
REW
STOP SELECT
F.F
OPEN/CLOSE EJECT
PLAY
SELECT
TRACKING REC INPUTSEL.
EJECT
OPEN/CLOSE
AUDIOVIDEO LINEIN 2
STANDBY/ON COPY
ELECTRONICS
For mechanical disassembly and adjustment, refer to the “Mechanical Manual” (TS-10A AC82-00023A).

Samsung Electronics 1-1
1. Precautions
1-1 Safety 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 pretective 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).
Fig. 1-1 AC Leakage Test
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 erath
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. 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.
7. 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.
8. Immediately before handling sny 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.)
9. 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.
10. 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.
DEVICE
UNDER
TEST
(READING SHOULD
NOT BE ABOVE
0.5mA)
LEAKAGE
CURRENT
TESTER
EARTH
GROUND
TEST ALL
EXPOSED METER
SURFACES
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
2-WIRE CORD

Precautions
1-2 Samsung Electronics
11. 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.
12. Observe the original lead dress, especially near
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.
13. 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,
( or ).
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.

Precautions
1-3Samsung Electronics
1-2 Handling the optical pick-up
The laser diode in the optical pick up may suffer elec-
trostatic breakdown because of potential static elec-
tricity from clothing and your body.
The following method is recommended.
(1) Place a conductive sheet on the work bench (The
black sheet used for wrapping repair parts.)
(2) Place the set on the conductive sheet so that the
chassis is grounded to the sheet.
(3) Place your hands on the conductive sheet(This
gives them the same ground as the sheet.)
(4) Remove the optical pick up block
(5) Perform work on top of the conductive sheet. Be
careful not to let your clothes or any other static
sources to touch the unit.
♦Be sure to put on a wrist strap grounded to the
sheet.
♦Be sure to lay a conductive sheet made of copper
etc. Which is grounded to the table.
Fig.1-2
(6) Short the short terminal on the PCB, which is in-
side the Pick-Up ASS’Y, before replacing the Pick-
Up. (The short terminal is shorted when the Pick-
Up Ass’y is being lifted or moved.)
(7) After replacing the Pick-up, open the short termi-
nal on the PCB.
THE UNIT
WRIST-STRAP
FOR GROUNDING
1M
1M CONDUCTIVE SHEET

Precautions
1-4 Samsung Electronics
1-3-1 Disassembly
1) Remove the power cord.
2) Disassemble the Deck-Assy.
3) Make solder land 2 points short on Pick-up.
(See Fig. 1-3)
4) Disassembly the Pick-up.
1-3-2 Assembly
1) Replace the Pick-up.
2) Remove the soldering 2 points on Pick-up.
3) Reassemble the Deck-Assy.
SOLDER LAND 2 POINTS SHORT
PICK-UP ASS'Y
Note : If the assembly and disassembly are not done in correct sequence, the Pick-up may be damaged.
Fig. 1-3
1-3 Pick-up disassembly and reassembly

Samsung Electronics 2-1
2. Product Specifications
Power Requirements AC110-240V, 50/60Hz (AC 220-240V : AUSTRALIA Model)
Power Consumption 25Watts
GENERAL
Weight 4.5kg
Dimensions W 430mm x D 330mm x H 94mm
Operating ambirnt Temperature +5°C ~ +35°C
Installation conditions Operation position : Horizontal,
Ralative humidity : Below 75%
INPUT Video input (Rear) RCA jack : 1.0Vp-p (unbalanced) 75Ω
Audio input (Rear) RCA jack : -8dBm, 47Kohm unbalanced
RF out UHF 21-69 (Initial CH36), UHF 28-69 (Inital CH38 : AUSTRALIA Model)
Audio (DVD, VCR) RCA jack
OUTPUT Audio (DVD only) Digital audio out (OPTICAL, COAXIAL)
Video (DVD, VCR) RCA jack
Video (DVD only) S-Video out
Component out : RCA jack
Tape format VHS type video tape,
S-VHS type video tape (Playback only)
Color system PAL, MESECAM, NTSC4.43, NTSC playback on PAL TV, NT3.58(OPTION)
VCR Tuning system B/G, D/K(OPTION), I(OPTION), M(OPTION)
Video S/N Above 43dB (standard recording)
Resolution Above 240 lines (standard recording)
Audio S/N Above 68dB (Hi-Fi), 38dB (Mono)
Audio frequency characteristics 20Hz - 20KHz (Hi-Fi)
Disc DVD, CD (12cm), CD (8cm), VIDEO-CD (12cm), MP3, CD-R(RW)
DVD Audio S/N 95dB
Audio dynamic range 105dB

Product Specifications
2-2 Samsung Electronics
MEMO

Samsung Electronics 3-1
3. Disassembly and Reassembly
3-1 Cabinet and PCB
3-1-1 Cabinet Top Removal
Lift up the Cabinet Top in the direction of arrow.
ŒREMOVE
3 SCREWS
Fig. 3-1 Cabinet Top Removal
3-1-3 Ass’y Front Panel Removal
ΠRELEASE 4 HOOKS
´ RELEASE 3 HOOKS
(Top View)
(Bottom View)
Fig. 3-3 Ass’y Front Panel Removal
3-1-2 Bottom Cover/Decoration-LEG Removal
ŒREMOVE 3 SCREWS
Fig. 3-2 Bottom Cover/Decoration-LEG Removal
3-1-4 Function-Timer PCB Removal
ΠRELEASE 4 HOOKS
Fig. 3-4 Function-Timer PCB Removal

3-2
Disassembly and Reassembly
Samsung Electronics
3-1-5 Chassis Removal
¨REMOVE 3 SCREWS
´REMOVE 2 SCREWS
ˇREMOVE 2 SCREWS
ŒREMOVE CONNECTORS
DVD MAIN PCB
DVD-DECK
VCR MAIN PCB
Fig. 3-5 Chassis Removal
3-1-6 VCR Main PCB Removal
ŒREMOVE 3 SCREWS
MODE SWITCH
When installing the ass'y full deck on the Main PCB,
be sure to align the assembly point of mode switch.
ASSEMBLY POINT
Fig. 3-6 VCR Main PCB Removal

Disassembly and Reassembly
3-3
Samsung Electronics
3-2 Circuit Board Locations
DVD MAIN PCB
FUNCTION-TIMER PCB
VCR MAIN PCB
Fig. 3-7 Circuit Board Locations

3-4
Disassembly and Reassembly
Samsung Electronics
3-3 DVD Deck
3-3-1 Tray Disc Removal
1) Insert a Screw Driver Œinto Emergency Hole ´and push the Slider Housing ˇin the direction arrow “A”.
2) When the Tray Disc ¨comes out a little, pull it in the direction arrow “B” by hand.
3) Pull the Tray Disc ¨to disassemble , while simultaneously pushing 2 Stoppers ˆ (left, right) in the direction
arrow “C”, “D”.
Fig. 3-8 Tray Disc Removal
"A"
ŒSCREW DRIVER
´EMERGENCY HOLE
ˇSLIDER HOUSING
¨TRAY DISC
"B"
"C"
ˆSTOPPER
ˆSTOPPER
"D"

Disassembly and Reassembly
3-5
Samsung Electronics
3-3-2 Assy P/U Deck Removal
1) Disconnect DCN2 Œ, DCN3 ´.
2) Lift down the Ass’y P/U Deck ˇwhile simultaneously pushing 2 Hooks ¨, ˆin the direction of arrow
“A”, “B”.
Fig. 3-9 Assy P/U Deck Removal
ŒDCN2
ˆ HOOK
¨ HOOK
´DCN3
ˇASSY- P/U DECK
"A"
"B"
<Assembly Point>
SLIDER HOUSING

3-6
Disassembly and Reassembly
Samsung Electronics
3-3-3 Housing Ass’y Removal
1) Remove Belt Œ.
2) Push the Hook ´in the direction arrow “A” and lift up Pulley Gear ˇ.
3) Push the Slider Housing ˆin the direction arrow “B” and lift up the Gear Tray ¨.
4) Lift up the Slider Housing ˆ.
5) Remove the soldering Ø of 2 points (Red, Black).
6) Remove 2 Screws ∏ and lift down the Motor Load Ass’y ”.
7) Push the 3 Hooks ’bottom side in the direction arrow “C” and lift up the Housing PCB ˝.
8) Push the Hooks Ôand remove Deck PCB .
Fig. 3-10 Housing Ass’y Removal
ŒBELT
ˇPULLEY GEAR
¨GEAR TRAY
”MOTOR LOAD ASSY
’3 HOOKS
˝HOUSING PCB
ÔHOOK
ØSOLDERING
∏2 SCREWS
ˆSLIDER HOUSING
´HOOK
"A"
"B"
<Bottom Side>
"C"
"C" "C"

Disassembly and Reassembly
3-7
Samsung Electronics
3-3-4 Sub Chassis Removal
1) Remove the Soldering of Motor Feed (+, - wire) Œ.
2) Remove the 4 Screws ´.
3) Lift up the Ass’y Brkt Deck ˇ.
Fig. 3-11 Sub Chassis Removal
´4 SCREWS
ˇASSY-BRAK DECK
ŒSOLDERING OF
MOTOR FEED (+, - WIRE)
+

3-8
Disassembly and Reassembly
Samsung Electronics
3-3-5 Ass’y Brkt Deck Removal
1) Remove Washer Œ.
2) Remove Gear Feed B ´, Gear Feed A ˇ.
3) Remove 2 Screws ¨.
4) Remove Shaft Pick-Up ˆand Pick-Up Ass’y Ø.
5) Remove 1 Screw ∏.
6) Remove 2 Screws ”.
7) Remove 3 Spring Spindle ’and Motor Spindle Ass’y ˝.
Fig. 3-12 Ass’y Brkt Deck Removal
¨2 SCREWS
ŒWASHER
´GEAR FEED B
”2 SCREWS
∏1 SCREW
ˆSHAFT PICK-UP
ˇGEAR FEED A
ØPICK-UP ASS'Y
’SPRING SPINDLE
˝MOTOR SPINDLE

Samsung Electronics 4-1
4. VCR Alignment and Adjustments
4-1 Reference
1) X-Point (Tracking center) adjustment, “Head switching adjustment” and “NVRAM option setting” can be adjusted with remote control.
2) When replacing the VCR Main PCB Micom (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) How to adjustment.
- Press the “SW709/SW707 (TEST)” button on Function-Timer PCB to set the adjustment mode.
- If the corresponding adjustment button is pressed, the adjustment is performed automatically.
4-1-1 Location of adjustment button of remote control
Fig. 4-1
NVRAM Option Setting
; "DISC MENU"
23
456
789
0
+
-
SHUTTLE
OPEN/CLOSE
STANDBY/ON
AUDIO
3D SOUND SCREEN FIT CLEAR
DVD VCR INPUT SEL.
ZOOM
VOLUME PROG
DIGEST
F.ADV/STEP
REC
DISC MENU
SETUP
/ENTER
RETURN TITLE SUBTITLE MARK
A . DUB SPEED TIMER INDEX
MODE/
REPEAT
KARAOKE
SVHS
DISPLAY
CLOCK/
COUNTER
ANGLE
VIEW
KARAOKE SEARCH
TRK AUTO TRK
X-Point (Tracking Center)
Adjustment ; "5"
Head Switching
Adjustment ; "SPEED"

4-2
Alignment and Adjustments
Samsung Electronics
4-1-2 TEST location for adjustment mode setting
Fig. 4-2 Function-Timer PCB (Top View)
TEST (SW709) BUTTON
TEST (SW707) BUTTON
TEST (SW709) BUTTON
<DVD-V85K/V72K/V55K/V52K>
<DVD-V12500/V12000/SV-DVD2EK>
<DVD-V52>

Alignment and Adjustments
4-3
Samsung Electronics
Test point : TP2 (Audio Output)
TP3 (Envelope)
TP4 (H’D S/W -Trigger)
TP5 (Control Pulse)
Fig. 4-3 Location of Test point (VCR Main PCB-Top View)
AUDIO OUTPUT
CONTROL PULSE
HEAD SWITCHING
ENVELOPE
4-2 Mechanical Adjustment
Note : Refer to the Mechanical Manual “TS-10A (AC82-00023A)” for the adjustment and confirmation of ass’y full
deck.
4-2-1 The number and position of test point
4-2-2 ACE Head position (X-Point) Adjustment
(See the 4-2-1(d) ACE Head Position (X-Point) Adjustment
on page 4-2 of the Mechanical Manual)
1) Playback the alignment tape (Color bar).
2) Press the “SW709/SW707 (TEST)” button on F/Timer
PCB to set the adjustment mode. (See Fig. 4-2)
3) Press the “5” button of remote control then
adjustment is operated automatically. (See Fig. 4-1)
4) Connect the CH-1 probe to TP3 (Envelope) the
CH-2 probe to TP4 (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.

4-4
Alignment and Adjustments
Samsung Electronics
4-3 Head Switching Point Adjustment
1) Playback the alignment tape.
2) Press the “SW709/SW707(TEST)” button on Function-Timer PCB to set the adjustment mode. (See Fig. 4-2)
3) Press the “SPEED” button of remote control then adjustment is operated automatically. (See Fig. 4-1)
4-4 NVRAM Option Setting
1) Press the “SW709/SW707(TEST)” button on Function-Timer PCB to set the adjustment mode. (See Fig. 4-2)
2) Press the “DISC MENU” button on the remote control about 5 seconds then option setting is appeared. (See Fig. 4-4)
3) Select the option number (See table 4-1) of corresponding model with “ , , ▲, ▼” button on the remote control.
4) If selecting the option number is completed, press the “▼” button of remote control.
(If “▼” button is pressed, the selected number is changes reversed color. ; See Fig. 4-4)
5) Press the “RETURN” button of remote control again to store the option number.
6) Turn the Power off.
1) NVRAM Option is adjusted at production line basically.
2) In case VCR Main PCB Micom (IC601) and NVRAM (IC605 ; EEPROM) is replaced, be sure to set the corresponding option number of the
reqaired model. (If the option is not set, the unit is not operated.)
CNG:OK SAVE : RETURN
01 02 03 04 05 06 07 08
09 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 32
33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48
49 50 51 52 53 54 55 56
57 58 59 60 61 62 63 64
65 66 67 68 69 70 71 72
Fig.4-4
<Table 4-1 NVRAM Option Table>
COUNTRY MODELS OPTION NUMBER
China DVD-V85K 6, 7, 8, 9, 10, 12, 20, 22, 26, 28, 29, 33, 35, 42, 44, 47, 51, 57, 60, 61, 63, 69, 70
H.K DVD-V85K 6, 7, 8, 9, 10, 12, 20, 22, 25, 28, 29, 35, 36, 42, 44, 47, 51, 57, 60, 61, 63, 69
DVD-V52 9, 10, 12, 15, 20, 22, 33, 34, 35, 36, 38, 40, 42, 44, 47, 50, 52, 57, 60, 61, 63, 68
Thailand DVD-V55K 6, 9, 10, 12, 20, 22, 33, 34, 35, 36, 40, 42, 44, 47, 51, 52, 57, 60, 61, 63, 68, 69
DVD-V52 9, 10, 12, 15, 20, 22, 33, 34, 35, 36, 38, 40, 42, 44, 47, 50, 52, 57, 60, 61, 63, 68
Malaysia/Indonesia DVD-V85K 6, 7, 8, 9, 10, 12, 20, 22, 25, 28, 29, 35, 36, 42, 44, 47, 51, 57, 60, 61, 63, 69
India/Vietnam/Singapore DVD-V52 9, 10, 12, 15, 20, 22, 33, 34, 35, 36, 38, 40, 42, 44, 47, 50, 52, 57, 60, 61, 63, 68
Iran DVD-V12000 6, 9, 10, 12, 20, 22, 33, 34, 35, 36, 40, 42, 44, 47, 52, 56, 57, 60, 61, 63, 68, 69
DVD-V12500 6, 9, 10, 12, 20, 22, 33, 34, 35, 36, 40, 42, 44, 47, 52, 56, 57, 60, 61, 63, 68, 69
UAE/Egypt DVD-V55K 6, 9, 10, 12, 20, 22, 33, 34, 35, 36, 40, 42, 44, 47, 51, 52, 55, 57, 60, 61, 63, 68, 69
Saudi Arabia/Lebanon DVD-V52K 9, 10, 12, 20, 22, 33, 34, 35, 36, 40, 42, 44, 47, 51, 52, 55, 57, 60, 61, 63, 68, 69
CIS SV-DVD2EK 6, 9, 10, 12, 20, 33, 34, 35, 36, 40, 42, 44, 47, 52, 54, 57, 60, 61, 63, 68, 69
Australia DVD-V72K 1, 6, 7, 9, 10, 12, 20, 28, 33, 34, 42, 44, 47, 51, 52, 53, 57, 60, 61, 63, 69
South Africa DVD-V55K 6, 9, 10, 12, 20, 33, 34, 35, 36, 40, 42, 44, 47, 51, 52, 53, 57, 60, 61, 63, 68, 69
DVD-V52K 9, 10, 12, 20, 33, 34, 35, 36, 40, 42, 44, 47, 51, 52, 53, 57, 60, 61, 63, 68, 69

Samsung Electronics 5-1
5. Troubleshooting
(VCR Section)
EE-VIDEO
Insert the
cassette tape recorded by
another VCR and press
PLAY Button
See (Video Missing in EE Mode)
Yes
Play Indicator
in the display
Yes
Yes
No
Mechanism
operation
See (Mechanism doesn't
operate in play mode)
Yes
No
PB-VIDEO See
(Video missing in play mode)
See (PB VIDEO) audio mising in play mode
Yes
No
Press PLAY key in
remote control Check IC601-58
Check Timer
Yes
NoNo
Play Mode Inoperative
No Power
(Standby LED OFF)
Fuse F1SS01 is OK?
AL5.8V D1SS14.
Check IC701, DT701.
Change Fuse F1SS01.
Check Trans PT1S01.
Yes Yes
No
AL5V
IC601-14, 92, 69, 70, 41. Check D620, D692, L605.
No
AL5.8V BD1SS4.
(VCR MAIN PCB) Check CN701 Wafer
Yes
No
Yes
Check CN701 Connector Wafer.
AL5V IC701-5, 20. No
Data IN, OUT, CLK
IC701-2, 3, 4.
Yes
No
No
Yes