Samsung VR 3040 Service Manual
VIDEO CASSETTE RECORDER
VR3040
SERVICE
1. Precautions
2. Alignment and Adjustment
3. Exploded View and Parts List
4. Electrical Parts List
5. Schematic Diagrams
Manual
VIDEO CASSETTE RECORDER CONTENTS
For mechanical disassembly and adjustment, refer to the “Mechanical Manual” (DX-9R AC68-00001A).
SAMTRON
POWER
EJECT
POWER
REC
REW
F .F
STOP
PLAY
SERVICE MANUAL VR3040
ELECTRONICS
© Samsung Electronics Co., Ltd. MAY. 2000
Printed in Korea
AC68-00988A
IMPORTANT SERVICE GUIDE
◆ MODE SWITCH (PROGRAM SWITCH) ASSEMBLY POINT
1) When installing the ass’y full deck on the Main PCB, be sure to align the assembly point of mode switch.
ASSEMBLY POINT
Fig. 1
◆ HOW TO EJECT THE CASSETTE TAPE
(If the unit does not operate on condition that tape is inserted into housing ass’y)
1) Remove the Holder Worm Œ and the gear worm ´. (See Fig. 2)
2) Turn the Gear Worm Wheel ˇ 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 Worm 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 ˇ counterclockwise using screw driver again up to the state of eject mode and then pick out the tape.
(Refer to Fig. 2)
Fig. 2 Fig. 3
ΠHOLDER WORM
´ GEAR WORM
SCREW DRIVER
ˇ GEAR WORM WHEEL
FRAME
Samsung Electronics 1-1
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.
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.)
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. 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
the following areas : Antenna wiring, sharp
edges, and especially the AC and high voltage
power supplies. Always inspect for pinched, outof-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,
( or ).
Use replacement components that have the same
ratings, especially for flame resistance and
dielectric strength specifications. Areplacement
part that does not have the same safety
characteristics as the original might create shock,
fire or other hazards.
Samsung Electronics
2-1
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 Micom (IC601) and NVRAM (IC603 ; 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.
- Intermittently short-circuit the test point on Main PCB with pincets 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
Fig. 2-1
SHUTTLE
V-LOCK
REPLAY F.ADV/SKIP
AUDIO SEARCH/EXIT CLEAR
R
E
C
R
E
C
.
S
P
E
E
D
D
I
S
P
L
A
Y
POWER EJECT
CH/TRK
TV/VCR
LINE IN
PREV.CH
A.TRK
MENU
SLOW
100
X-Point (Tracking Center)
Adjustment
Head Switching Adjustment
NVRAM Option Setting
<This type of remote control can adjust.>
Remote Control for adjustment is not supplied as a Service Jig.
2-2
Samsung Electronics
Alignment and Adjustment
2-1-2 Test point location for adjustment mode setting
Fig. 2-2 Main PCB (Bottom View)
Short-Circuit
Alignment and Adjustment
Samsung Electronics
2-3
2-2 Mechanical 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)
Fig. 2-3 Location of Test point (Main PCB-Top View)
AUDIO OUTPUT
HEAD SWITCHING
ENVELOPE
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) Intermittently short-circuit the two test points 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)
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.
2-4
Samsung Electronics
Alignment and Adjustment
2-3 Head Switching Point Adjustment
1) Playback the alignment tape.
2) Intermittently short-circuit the two test points on Main PCB to set the adjustment mode. (See Fig. 2-2)
3) Press the “REC.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) Intermittently short-circuit the two test points 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)
3) Select the option number (See Table 2-1) of corresponding model with “FF” and “REW” button on the remote
control.
4) If selecting the option number is completed, press the “STOP” button of remote control.
(If “STOP” button is pressed, the selected number is changes reversed color. ; See Fig. 2-4)
5) Press the “MENU” button of remote control again to store the option number.
(“save” is displayed for a second as shown Fig. 2-5 and this setting is completed.)
6) Turn the Power off.
1) NVRAM Option is adjusted at production line basically.
2) In case Micom (IC601) and NVRAM (IC603 ; 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.)
MOVE :
SAVE
: MENU
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
Fig. 2-4
MOVE : save
SAVE
: MENU
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
Fig. 2-5
MODEL OPTION NUMBER
VR3040 1, 6, 7, 12, 20, 30, 36, 38
<Table 2-1>
Samsung Electronics 3-1
3. Exploded View and Parts List
3-1 Cabinet Assembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3-2 Mechanical Parts (Top Side) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3-3 Mechanical Parts (Bottom Side) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Page
3-2
3-4
3-6
Exploded View and Parts List
3-2 Samsung Electronics
3-1 Cabinet Assembly
S.N.A. : Service Not Available
157
153
FULL DECK (S.N.A.)
BOTTOM-COVER (S.N.A.)
TM401B
200
MAIN PCB (S.N.A.)
157
BRACKET-FRAME
(S.N.A.)
S601A
LD601A
S602A
LED PCB (S.N.A.)
CN605B
CN303B
101
155
1
21
22
Exploded View and Parts List
Samsung Electronics 3-3
Loc. No Parts No. Description ; Specification Remark
1 AC97-01076A ASSY-PANEL FRONT;HIPS94V2,VR3040/XAA,D/G
21 AC64-00291C DOOR-CASSETTE;-,ABS94HB ,-,-,-,D/GRAY,-,
22 AC61-62032A SPRING-MASK;X-9,-,SUS,-,4.4,-,SV-C130
101 AC64-30891A CABINET-TOP;SP-A12T,SECC,PCM,0.625,320*2
153 AC60-12126A SCREW-BH;-,BH,-,4*12,FE,FZY,-,-,155 AC60-12134A SCREW-TAP BH;-,BH,-,2-4X16,-,FE
157 AC60-10063A SCREW-TAPTITE;BH,+,-,M3,L12,ZPC3,SWRCH18
200 AC39-10200N POWER-CORD;EP2,SPT-2,AWG#18,1.8MT,WAFER,
CN303B 3809-001110 CABLE-FLAT;30V,80C,150mm,7P,1.25mm,UL289
CN605B 3809-001112 CABLE-FLAT;30V,80C,130mm,5P,1.25mm,UL289
LD601A AC61-21009A HOLDER-LED;-,POM(M90-44),-,BLK,-,X-9
S601A AC61-21008A HOLDER-SENSOR;-,POM(M90-44),-,BLK,-,X-9
S602A AC61-21008A HOLDER-SENSOR;-,POM(M90-44),-,BLK,-,X-9
TM401B AC61-00050A CONNECTOR-BOARD;-,HIPS,-,2,61,-,BLK,-,-,
Exploded View and Parts List
3-4 Samsung Electronics
3-2 Mechanical Parts (Top Side)
G001
K250
K248
K110
K502
K350
K330
K182
K140
K490
K530
K240
G532
G420
G450
K546
G510
B410
B440
B444
B446
B448
B452
G527
G520
G480
G680
S.N.A.
S.N.A.
S.N.A.
S.N.A.
S.N.A.
G530
K340
B473
K188
G555
G546
S.N.A. : Service Not Available
S.N.A.
Exploded View and Parts List
Samsung Electronics 3-5
Loc. No Parts No. Description ; Specification Remark
B410 AC31-12016A MOTOR-LOADING ASSY;-,-,X-9
B440 AC60-10515A SCREW-MACHINE;-,PH,+,-,M3,L3,ZPC,-,YEL
B444 AC66-20571A GEAR-WORM;-,POM SW-01,0.5,2,-,4.5,X-9
B446 AC61-21005A HOLDER-WORM;-,POM M90-44,-,-,-,X-9
B448 AC66-20573A GEAR-WORM WHEEL;-,POM SW-01,0.6,11,-,6.6
B452 AC66-20575A GEAR-FL CAM;-,POM SW-01,M0.6,Z88,-,PCD58
B473 AC61-60559A SPRING-PINCH DRIVE;-,TS,SUS304,PI0.5,OD4
G001 AC97-00738A ASSY-CYLINDER;CX-9TA,NTSC,2HD, ALPS
G420 AC66-80142A SLIDER-SUPPLY ASSY;-,X-9(TS),-,-,-,X-9
G450 AC66-80141A SLIDER-TAKE UP ASSY;-,X-9(TS),-,-,-,X-9
G480 AC33-10217H HEAD-ACE ASSY;-,-,-,-,X-9
G510 AC60-10518A SCREW-TAP TITE;-,PH,+,SW+ZW,M2.6,L5.6,ZP
G520 AC66-30539A LEVER-#9 GUIDE ASSY;-,X-9(TS),-,-,-,X-9
G527 AC61-60553A SPRING-#9 GUIDE;-,ES,SUS304-WPB,OD3.1,0.
G530 AC33-10217G HEAD-FE;VAA00000275,-,-,-,X-9
G532 AC60-10519A SCREW-TAP TITE;-,PH,+,-,M2.6,L8,ZPC
G546 AC66-30535A LEVER-FL DOOR;-,POM M90-44,-,-,BLK,X-9
G555 AC59-90403A UNIT-PINCH ASSY;X-9,G680 AC66-30557A LEVER-H/CLEANER ASSY;-,POM+URETHANE,-,- (OPTIONAL)
K110 AC66-10267A REEL-DISK S;-,POM M90-44,-,-,X-9
K140 AC66-10268A REEL-DISK T;-,POM M90-44,-,-,X-9
K182 AC66-30524A LEVER-IDLER;-,POM9044,-,-,-,K188 AC66-20577A GEAR-IDLER;-,PEBAX 7033,-,-,-,-,X-9
K240 AC66-30538A LEVER-TENSION ASSY;-,X-9(TS),-,-,-,X-9
K248 AC61-60554A SPRING-TENSION LEVER;-,ES,SUS304-WPB,OD3
K250 AC63-12029A BAND-BRAKE ASSY;-,X-9(TS),-,-,-,X-9
K330 AC66-30550A LEVER-S.BRAKE ASSY;-,POM+SUS,-,-,-,X-9
K340 AC66-30549A LEVER-T.BRAKE ASSY;-,POM+SUS,-,-,-,X-9
K350 AC61-60564A SPRING-BRAKE;-,TENSION,SWP-A,0.25,3,-,XK490 AC61-21010B HOLDER-CASS ASSY;-,SECC+POM+SUS,-,-,SEIN
K502 AC61-60561A SPRING-FL.LEVER-LR;-,ES,SUS304 WPB,PI2.7
K530 AC66-30546A LEVER-FL.ARM ASS’Y;-,SECC+POM+SUS,-,-,-,
K546 AC61-50658A GUIDE-CASS. DOOR;-,POM M90-44,-,-,NTR,-,
Exploded View and Parts List
3-6 Samsung Electronics
3-3 Mechanical Parts (Bottom Side)
G542
B560
B484
B458
B500
B488
B462
(OPTIONAL)
S.N.A.
S.N.A.
S.N.A.
S.N.A.
B456
K222
K200
K225
K221
B570
B238
S.N.A. : Service Not Available
Exploded View and Parts List
Samsung Electronics 3-7
Loc. No Parts No. Description ; Specification Remark
B238 AC61-50660A SLEEVE-TENSION;-,POM M90-44,-,-,ID3,-,-,
B456 AC66-20576A GEAR-JOINT 1;-,POM SW-01,M1.0,Z22,-,PCD2
B458 AC66-20574A GEAR-JOINT 2;-,POM SW-01,M1.0,Z14,-,PCD1
B462 AC60-10517A SCREW-TAP TITE;-,PH,+,-,M2.6,L5,ZPC,-,YE
B484 AC66-20580A GEAR-LOADING DRIVE;-,POM SW-01,M1.0,Z32,
B488 AC66-30543A LEVER-S LOAD ASSY;-,-,-,-,-,X-9
B500 AC66-30542A LEVER-T LOAD ASSY;-,-,-,-,-,X-9
B560 AC31-12017A MOTOR-CAPSTAN;DMVCMC07C,-,X-9
B570 AC60-10514A SCREW-CAPSTAN;-,PH,+,M2.6,L6,G542 AC66-60051A BELT-PULLEY;-,5CM-70,2 * 2,-,71.3,-,X-9
K200 AC61-21012A HOLDER-CLUTCH ASSY;-,-,-,-,-,X-9
K221 AC66-20581A GEAR-CENTER ASSY;-,POM,M=O.5,-,HIGHT T.,
K222 AC60-30306A WASHER-SLIT;-,-,ID2.1,OD5.0,T0.5,-,POLYS
K225 AC66-30547A LEVER-UP DOWN ASSY;-,POM+SUS,-,-,-,X-9
Exploded View and Parts List
3-8 Samsung Electronics
MEMO
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