akira VCR-S207 User manual

Video Cassette Recorder
Service Manual

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Model No.: VCR-S207
Version: 1.0
MODEL:
VCR-S207

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Model No.: VCR-S207
Version: 1.0
CONTENTS
IMPORTANT SERVICE GUIDE 4
1. PRECAUTIONS 6
2. ALIGNMENT AND ADJUSTMENT 9
2.1 Reference 9
2.1.1 Location of Adjustment button of remote control 10
2.1.2 SW718 location for adjustment mode setting 11
2.2 Mechanical Adjustment 12
2.2.1 The number & position of test point 12
2.2.2 ACE head position (X-point) adjustment 13
2.3 Head switching point adjustment 13
2.4 NVRAM option setting 13
3. EXPLODED VIEW AND PARTS LIST 15
3.1 Cabinet Assembly 15
3.2 Mechanical Parts (Top Side) 17
3.3 Mechanical Parts (Bottom Side) 19
4. ELECTRICAL PARTS LIST 21
5. BLOCK DIAGRAM 32
6. SCHEMANTIC DIAGRAM 33
6.1 S.M.P.S 34
6.2 Power Drive 35
6.3 System Control / Servo Display 36
6.4 Audio / Video 37
6.5 TM 38
6.6 Input –Output 39
6.7 Sub 40

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Model No.: VCR-S207
Version: 1.0
IMPORTANT SERVICE GUIDE
MODE SWITCH (PROGRAM SWITCH) ASSEMBLY POINT
1) When installing the ass’y deck on the Main PCB, be sure to align the assembly point of
mode switch.
HOW TO EJECT THE CASSETTE TAPE
(If the tape is stuck in the unit)
ASSEMBLY POINT
1 Turn the Gear Worm clockwise in the direction of arrow with screwdriver. (See Fig. 2)
(Other method ; Remove the screw of Motor Load Ass’y, Separate the Motor Load Ass’y)
2 When Slider S, T are approaches the unloading position, rotate holder Clutch counter
clockwise after inserting screwdriver in the frame’s bottom hole in order to wind the
unwound tape. (Refer to Fig. 3)
3 (If you rotate Gear Worm continuously when tape is unwinding, you may cause tape
contamination by grease and tape damage. Be sure to wind the unwound tape with the unit
in the horizontal position.)
4 Rotate Gear Worm clockwise using a screwdriver until the mecha is in the eject state.
Remove the tape. (Refer to Fig. 2)

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Model No.: VCR-S207
Version: 1.0

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Model No.: VCR-S207
Version: 1.0
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, screw heads 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.
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.)

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Model No.: VCR-S207
Version: 1.0
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.

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Model No.: VCR-S207
Version: 1.0
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,
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,
( 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.

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Model No.: VCR-S207
Version: 1.0
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 (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 adjust.
a. Press the “TEST” button on F-AV PCB/Main PCB/Function PCB to set the adjustment
mode.
b. If the corresponding adjustment button is pressed, the adjustment is performed
automatically.
c. When the adjustment is completed, be sure to turn the power off.

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Model No.: VCR-S207
Version: 1.0
2.1.1 Location of adjustment button of remote control

Fig. 2-2 Main PCB (Top View)
2-1-2 SW718 location for adjustment mode setting
PRESS
R
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Model No.: VCR-S207
Version: 1.0

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Model No.: VCR-S207
Version: 1.0
2.2 Mechanical Adjustment
Note : Refer to the Mechanical Manual “TS-10A (AC82-00023A)” for the adjustment and
confirmation of ass’y full deck.
2.2.1 The number and position of test point

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Model No.: VCR-S207
Version: 1.0
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 “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)
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 Head Switching Point Adjustment
1. Playback the alignment tape.
2. Press the “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 a adjusted in the factory.
2. In case Micom (IC601) and NVRAM (IC605 ; EEPROM) are replaced, be sure to set the
corresponding option number of the repaired model. (If the option is not set, the unit will not
operate.)
1. Press the “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)
3. Select the option number (See Table 2-1) of corresponding model with “CURSOR” button
on the remote control.
4. After selecting the option number is completed, press the “OK” button of remote control.
(If “OK” button is pressed, the selected number is changes color; See Fig. 2-4)
5. Press the “MENU” button of remote control again to store the option number.
(“PLEASE WAIT” is displayed for a second as shown Fig. 2-5 and this setting is
completed.)
6. Turn the Power off.

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Model No.: VCR-S207
Version: 1.0
<Table 2-1 NVRAM Option Number>
MODELS OPTION NUMBERS
VCP-007LR4(G)/VCP-007LR4(S) 10, 12, 20, 22, 35, 37, 40, 47, 51, 55, 56, 57, 60, 61, 64, 68, 70, 71
VCR-S207(G)/VCR-S207(S) 10, 12, 15, 20, 22, 35, 38, 42, 47, 52, 55, 56, 57, 60, 61, 64, 71

TM401B
102
S.N.A : Service Not Available
FULL DECK (S.N.A)
153
BRACKET-FRAME
(S.N.A)
157
22
22
21
21
155
101
200
MAIN PCB (S.N.A)
S602A
S601A
LD601A
1
1
F-A/V PCB (S.N.A)
OK
STANDBYON EJECT
SLOW
SHUTTLE
V-LOCK
CLR/RST F.ADV INDEX
A.TRK IPC INPUT
REPEAT
TRK PROG
AUDIO
REC MENU
SPEED DUB TV/VCR TIMER
DISPLAY
UT01VCP-007LR4(G)/007LR4(S) VCR-S207(G)/S207(S)
CN3A1S
(VCP ONLY)
R
E
P
E
A
T
STANDBY/ON DISPLAY
CNT.RESET SPEED
IIP/S IPC TRK
REC MENU
Model No.: VCR-S207
Version: 1.0
3.1 Cabinet Assembly
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Model No.: VCR-S207
Version: 1.0
Loc. No Parts No. Description / Specification
1 Refer to table below ASSY-PANEL FRONT;
21 Refer to table below DOOR-CASSETTE;
22 AC61-62032A SPRING ETC-MASK;SV-C130,SUS,4.4,-,-,-,-,
101 Refer to table below CABINET-TOP;
102 AC63-00074A COVER-BOTTOM;SV-653F,SECC,T0.5,-,-,-,-,-
153 AC60-12126A SCREW-BH;-,-,FE,FZY,BH,-,-,4*12,-,-
155 AC60-12131A SCREW-TAP TITE BH;-,-,-,FE,-,3X10,-,-,FZ
157 AC60-10063A SCREW-TAPTITE;-,-,L12,ZPC3,+,-,M3,-,SWRC
200 AC39-10019A CBF POWER
CORD;KKP-419C,H03VVH2-F,VDE/KE
CN3A1S 3809-001206 CABLE-FLAT;30V,-20to+80C,140mm,6P,1.25mm
LD601A AC61-21009A HOLDER-LED;X-9,POM(M90-44),-,-,-,BLK,-
S602A AC61-00229A HOLDER-SENSOR;SCORPIO2,POM,-,-,-,BLACK,-
TM401B AC61-00151A CHASSIS-ASSY;SV-445G,HIPS94HB,T2,-,-,-,-
UT01 Refer to table below REMOCON-ASSY;
MODELS 1 21 101 UT01
VCR-S207(G) AC97-01492R AC64-00805R AC64-01054E AC59-00072A
VCR-S207(S) AC97-01492Q AC64-00805Q AC64-01054D AC59-00071A

G001
G555
B475
B561
G510
G480 K546
G680
G681
B410
B440
B448
B452
G546
G560
G060
G520
G527
K188
K182
K110
K240
K248
K350
K330
K140
K340
G070
K470
B474
B473
K250
K530
K490
G530
G420 G450
K502
(OPTIONAL)
(OPTIONAL)
Model No.: VCR-S207
Version: 1.0
3.2 Mechanical Parts (Top Side)
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Model No.: VCR-S207
Version: 1.0
Loc. No Parts No. Description / Specification Remark
B410 AC31-00018A MOTOR-LOADING ASSY;-,SCORPIO2(TS-10A),-,
B440 AC60-10515A SCREW-MACHINE;-,-,M3,L3,PH,+,-,-,ZPC,-
B448 AC66-00008A GEAR-WORM WHEEL;TS-10,POM,0.8,40,-,NAT,3
B452 AC66-00011A GEAR-FL CAM;TS-10,POM,0.8,59,-,BLK,48.48
B473 AC61-00105A SPRING ETC-PINCH DRIVE;TS-10,SUS304-WPB,
B474 AC61-30180A PLATE-JOINT;X-9,SECC20/20,T0.8,-,-,-,-
B475 AC47-00003A DAMPER-CAPSTAN;SCORPIO2,POM, NATUAL,-,-,
B561 3809-001270 CABLE-FLAT;30V,80C,140MM,10P,1.25MM,UL28
G001 AC97-02033A ASSY-CYLINDER;PAL,2H’D(LP),CTS9-SEM (2PL
G060 6006-001092 SCREW-ASS’Y MACH;WS,PH,+,M3.0,L6.0,ZPC(Y
G070 AC61-00161A PLATE-GROUND DECK;TS-10,SPTE,T0.3,-,-,-,
G420 AC66-80142A SLIDER-SUPPLY ASSY;X-9,X-9(TS),-,-,-,-,-
G450 AC66-80141A SLIDER-TAKE UP ASSY;X-9,X-9(TS),-,-,-,-,
G480 AC97-01660A ASSY-HEAD ACE;-,SCORPIO2(TS-10A),VTR-1*2
G510 6006-001075 SCREW-ASS’Y TAPT;WSP,PH,+,M2.6,L5.0,ZPC(
G520 AC66-00033A LEVER-#9 GUIDE ASS’Y;TS-10,-,-,-,-,-,-,-
G527 AC61-60553A SPRING ETC-GUIDE 9;X-9,SUS304-WPB,0.25,-
G530 AC33-00007A HEAD-FE;-,-,HVFHPOO43A,-,-
G546 AC66-00005A LEVER-FL DOOR;TS-10,POM,-,-,-,-,NAT,-
G555 AC66-00032A LEVER-UNIT PINCH ASS’Y;TS-10,-,-,-,-,-,-
G560 AC61-00122A POST-#8 GUIDE ASS’Y;TS-10,POM+SUS 303,-,
G680 AC66-00046A LEVER-HEAD CLEANER
ASS’Y;TS-10,POM+URETH
(OPTIONAL)
G681 AC61-50686A SLEEVE-HEAD CLEANER;-,POM,-,-,-,-,-,-,TS (OPTIONAL)
K110 AC66-10267A REEL-DISK S;X-9,POM,-,-,-,-,-,-
K140 AC66-10268A REEL-DISK T;X-9,POM,-,-,-,-,-,-
K182 AC66-30524A LEVER-IDLER;-,POM,-,-,-,-,-,-
K188 AC66-00039A GEAR-IDLE;TS-10,PET K3372,0.5,-,-,NTR,28
K240 AC66-00035A LEVER-TENSION ASS’Y;TS-10,SECC E20/20+SU
K248 AC61-00107A SPRING ETC-TENSION LEVER;TS-10,SUS304-WP
K250 AC69-00104A BAND-BRAKE ASS’Y;TS-10,-,-,-,-,-,-
K330 AC66-30550A LEVER-S.BRAKE ASSY;-,POM+SUS,-,-,-,X-9
K340 AC66-30549A LEVER-T.BRAKE ASSY;-,POM+SUS,-,-,-,X-9
K350 AC61-00106A SPRING ETC-BRAKE;TS-10,SUS304-WPB,-,-,-,
K470 AC66-00020A SLIDER-FL DRIVE;TS-10,SECC E20/20,1.0,-,
K490 AC61-00120A HOLDER-FL CASS. ASS’Y;TS-10,-,-,-,-,-,-
K502 AC61-60561A SPRING ETC-FL.LEVER-LR;X-9,SUS304 WPB,OD
K530 AC66-00034A LEVER-FL ARM ASS’Y;TS-10,-,-,-,-,-,-,-
K546 AC61-50658A GUIDE-CASS. DOOR;X-9,POM,-,-,-,NTR

G542
B462
B560
B501
B484
B488
B500
B456
B458
B464
B468
K222
K200
K225
K221
B478
B570
B460
B489
Model No.: VCR-S207
Version: 1.0
3.3 Mechanical Parts (Bottom Side)
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Model No.: VCR-S207
Version: 1.0
Loc. No Parts No. Description / Specification Remark
B456 AC66-00009A GEAR-JOINT 1;TS-10,POM,1.5,17.5(22),-,NA
B458 AC66-00012A GEAR-JOINT 2;TS-10,POM,1.0,23,-,BLK,24.6
B460 AC61-00090A BRACKET-GEAR;TS-10,SECC E20/20,0.8,-,-,-
B462 AC60-10517A SCREW-TAP TITE;-,-,M2.6,L5,PH,+,-,-,ZPC,
B464 AC66-00019A SLIDER-CAM;TS-10,SECC E20/20,1.2,-,-,-,-
B468 AC66-00017A LEVER-PINCH DRIVE;TS-10,SECC E20/20,1.0
B478 AC66-00016A LEVER-TENSION DRIVE;TS-10,SECC E20/20,1
B484 AC66-00030A GEAR-LOADING DR. ASS’Y;TS-10,POM+SWPB,-,
B488 AC66-00023A LEVER-S LOADING;TS-10,POM,-,-,-,-,NAT,-
B489 AC66-00021A LINK-LOADING S;TS-10,SECC E20/20,0.8,-,-
B500 AC66-00024A LEVER-T LOADING;TS-10,POM,-,-,-,-,NAT,-
B501 AC66-00022A LINK-LOADING T;TS-10,SECC E20/20,0.8,-,-
B560 AC31-00016A MOTOR-CAPSTAN;F2QVB05,SCORPIO2(TS-10A),-
B570 AC60-10514A SCREW-CAPSTAN;-,-,M2.6,L6,PH,+,-,-,-,-
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 FASTENER-WASHER SLIT;-,-,ID2.1,OD5.0,T0.
K225 AC66-00006A LEVER-UP DOWN;TS-10,POM,-,-,-,-,NAT,-