SLV-D271P, SLV-D370P (serv.man3) - Sony VCR Service Manual (repair manual)

Chilean Model

Peruvian Model

SLV-D370P CS

Mexican Model

SLV-D370P MX

DX-13A MECHANISM

Photo: SLV-D370P

Láser

Láser de semiconductor

Formato

Estándar VHS (sistema de video para el hogar) 
NTSC

Sistema de grabación de video

Sistema FM de exploración helicoidal con cabeza 
giratoria

Cabezas de video

Cuatro cabezas de doble acimut

Señal de video

Color NTSC, estándar EIA

Velocidad de cinta

SP (reproducción estándar): 33,35 mm/s
EP (reproducción extendida): 11,12 mm/s 
LP (larga duración): 16,67 mm/s,

reproducción solamente

Tiempo máximo de grabación/reproducción

8 h en modo EP (reproducción extendida)
(con cintas T-160)

Tiempo de rebobinado

Aprox. 1 min (con cintas T-120)

Cobertura de canales

VHF (frecuencia muy alta) 2 a 13

UHF (hiperfrecuencia) 14 a 69
CATV (televisión por cable) A-8 a A-1, A a W, 
W+1 a W+84

Antena

Terminal de antena de 75 ohm para VHF/UHF 
(frecuencia muy alta/hiperfrecuencia)

LINE IN 1 (entrada de línea 1) y LINE-2 IN (entrada de 
línea 2)

VIDEO IN (entrada de video), toma fono (1 por 
cada)

Entrada de señal: 1 Vp-p, 75 ohm, desbalanceada, 
sincronización negativa

AUDIO IN (entrada de audio), tomas fono (2 por 
cada)

Nivel de entrada: 327 mVrm
Impedancia de entrada: más de 47 kilohm

LINE OUT (salida de línea)

VIDEO OUT (salida de video), toma fono (1)

Señal de salida: 1 Vp-p, 75 ohm, desbalanceada, 
sincronización negativa

AUDIO OUT (salida de audio), tomas fono (2)
Salida estándar: 327 mVrm

Impedancia de carga: 47 kilohm
Impedancia de salida: menos de 10 kilohm

DIGITAL OUT (salida digital)

COAXIAL, toma fono
Señal de salida: 0,5 Vp-p, 75 ohm

COMPONENT VIDEO OUT (salida de video 
componente) (Y, Pb, Pr)

Toma fono
Y: 1,0 Vp-p/Pb, Pr: 0,7 Vp-p/75 ohm

S-VIDEO OUT (salida S-VIDEO)

4 pines, toma mini DIN

Y: 1,0 Vp-p, desbalanceada, sincronización negativa
C: 0,286 Vp-p, impedancia de carga 75 ohm

Reloj

Bloqueo por cuarzo

Indicación del temporizador

Ciclo de 12 h

Ajuste del temporizador

8 programas (máx.)

Requisitos de alimentación

SLV-D370P MX

ca120 V, 60 Hz
SLV-D370P CS

ca110-240 V, 50/60 Hz

Consumo de energía

25 W

Reserva de alimentación

Duración de reserva: 30 min en una vez

Temperatura de funcionamiento

0

°C a 45°C

Temperatura de almacenamiento

–20

°C a 60°C

Humedad de funcionamiento

25% a 80%

Dimensiones incluidas partes y controles salientes
(an/al/prf)

Aprox. 430 

× 85 × 287 mm

Peso

Aprox. 3,6 kg

mando a distancia (1)
Pilas de tamaño AA (R6) (2)

Adaptador de enchufe (1) (solo SLV-D370P CS)

Cable coaxial de 75 ohm con conectores tipo F (1)

Diseño y especificaciones están sujetos a cambios sin 
previo aviso.

— 2 —

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.

0

0

The use of optical instrument with this product will increase eye
hazard.

Ω

µ

The AC leakage from any exposed metal part to earth ground

and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA

WT-540A.  Follow the manufacturers' instructions to use these
instruments.

2. A battery-operated AC milliammeter.  The Data Precision 245

digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM

or battery-operated AC voltmeter.  The “limit” indication is
0.75V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a
passive VOM that is suitable.  Nearly all battery operated digital
multimeters that have a 2V AC range are suitable.  (See Fig. A)

1. Check the area of your repair for unsoldered or poorly-soldered

connections.  Check the entire board surface for solder splashes
and bridges.

2. Check the interboard wiring to ensure that no wires are “pinched”

or contact high-wattage resistors.

3. Look for unauthorized replacement parts, particularly transistors,

that were installed during a previous repair.  Point them out to
the customer and recommend their replacement.

4. Look for parts which, though functioning, show obvious signs

of deterioration.  Point them out to the customer and recommend
their replacement.

5. Check the line cord for cracks and abrasion. Recommend the

replacement of any such line cord to the customer.

6. Check the B+ voltage to see it is at the values specified.

7. Check the antenna terminals, metal trim, “metallized” knobs,

screws, and all other exposed metal parts for AC leakage.  Check
leakage as described below.

After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:

— 3 —

1

Safety Precautions ······························································ 4

2

Servicing Precautions ························································  6

3

ESD Precautions ································································· 7

4

Handling the Optical Pick-up ············································· 8

5

Pick-up Disassembly and Reassembly ······························  9

Procedimientos iniciales ·················································· 1-2
Conexiones avanzadas ····················································· 1-6
Operaciones básicas ························································ 1-7
Configuración y ajustes de DVD ··································· 1-13
Operaciones adicionales de DVD ·································· 1-16
Operaciones adicionales de la Videograbadora ············· 1-23
Información complementaria ········································ 1-25

2-1

Cabinet and PCB

2-1-1 Cabinet Top Removal ····················································· 2-1
2-1-2 Bottom Cover Removal ·················································· 2-1
2-1-3 Ass’y Front Panel Removal ············································ 2-1
2-1-4 Function Timer PCB Removal ······································· 2-1
2-1-5 Chassis Removal ···························································· 2-2
2-1-6 VCR Main PCB Removal ·············································· 2-2
2-2

Circuit Board Locations ················································· 2-3

2-3

VCR Deck Parts Locations

2-3-1 Top View ········································································ 2-4
2-3-2 Bottom View ··································································· 2-6
2-4

VCR DECK

2-4-1 Ass’y Holder Cassette Removal ····································· 2-7
2-4-2 Ass’y Lever Arm Removal ············································· 2-7
2-4-3 Lever Door Removal ······················································ 2-8
2-4-4 Slider FL Drive, Gear FL Cam Removal ······················· 2-8
2-4-5 Gear Worm Wheel Removal ··········································· 2-9
2-4-6 Cable Flat Removal ························································ 2-9
2-4-7 Ass’y Motor Loading Removal ···································· 2-10
2-4-8 Bracket Gear, Gear Joint 2, 1 Removal ························ 2-10
2-4-9 Gear Loading Drive, Slider Cam,

Ass’y Lever Load S, T Removal ·································· 2-11

2-4-10 Gear Loading Drive, Slider Cam,

Ass’y Lever Load S, T Assembly ································· 2-11

2-4-11 Lever Pinch Drive, Lever Tension Drive Removal ······· 2-12
2-4-12 Ass’y, Lever Tension Ass’y Band Brake Removal ······· 2-12
2-4-13 Ass’y Lever Brake S, T Removal ································· 2-13
2-4-14 Ass’y Gear Idle Removal ············································· 2-13
2-4-15 Disk S, T Reel Removal ··············································· 2-14
2-4-16 Ass’y Holder Clutch Removal ····································· 2-14
2-4-17 Ass’y Lever Up Down, Ass’y Gear Center Removal ··· 2-15
2-4-18 Guide Cassette Door Removal ····································· 2-15
2-4-19 Ass’y Lever Unit Pinch, Plate Joint,

Spring Pinch Drive Removal ········································ 2-16

2-4-20 Ass’y Lever #9 Guide Removal ··································· 2-16
2-4-21 FE Head Removal ························································ 2-17
2-4-22 Ass’y ACE Head Removal ··········································· 2-17
2-4-23 Ass’y Slider S, T Removal ··········································· 2-18
2-4-24 Plate Ground Deck, Ass’y Cylinder Removal ·············· 2-18
2-4-25 Hook Capstan, Belt Pulley Removal ···························· 2-19
2-4-26 Ass’y Motor Capstan Removal ···································· 2-19
2-4-27 Ass’y Post #8 Guide Removal ····································· 2-20
2-4-28 Ass’y Level Head Cleaner Removal ···························· 2-20
2-4-29 How to Eject the Cassette Tape ···································· 2-20
2-5

The Table of Cleaning, Lubrication and
Replacement Time About Principal Parts ···················· 2-21

2-6

DVD Deck

2-6-1 Holder Chuck Removal ················································ 2-22
2-6-2 Tray Disc Removal ······················································· 2-23
2-6-3 Ass’y P/U Deck Removal ············································ 2-24
2-6-4 Ass’y Housing Removal ··············································· 2-25
2-6-5 Ass’y Bracket Deck Removal ······································ 2-26

·························································· 3-1

4-1

VCR Main ······································································· 4-3

4-2

DVD Main ······································································· 4-7

4-3

Function Timer ······························································ 4-11

◆ Block Identification of Main PCB ········································· 5-3
5-1

S.M.P.S. ··········································································· 5-5

5-2

Power Drive ····································································· 5-7

5-3

Logic/Function Timer ······················································ 5-9

5-4

A/V ················································································ 5-11

5-5

Hi-Fi/MTS ····································································· 5-13

5-6

Input-Output ·································································· 5-15

5-7

DVD A/V Decoder ························································ 5-17

5-8

DVD I/O ········································································ 5-19

5-9

Functin Timer ································································ 5-21

6-1

VCR Adjustment ····························································· 6-1

6-1-1 Reference ········································································· 6-1
6-1-2 Head Switching Point Adjustment ·································· 6-3
6-2

VCR Mechanical Adjustment ·········································· 6-4

6-2-1 Tape Transport System and Adjustment Locations ········· 6-4
6-2-2 Tape Transport System Adjustment ································· 6-5
6-2-3 Reel Torque ··································································· 6-10

·················································

7-1

8-1

Exploded Views ······························································· 8-2

8-1-1 Cabinet Assembly ···························································· 8-2
8-1-2 VCR Mechanical Parts (Top Side) ·································· 8-3
8-1-3 VCR Mechanical Parts (Bottom Side) ···························· 8-4
8-1-4 DVD Mechanical Parts ···················································· 8-5
8-2

Electrical Parts List ························································· 8-6

— 4 —

1) Before returning an instrument to the customer, always make a

safety check of the entire instrument, including, but not limited
to, the following items:

(1) Be sure that no built-in protective devices are defective or have

been defeated during servicing.
(1)Protective shields are provided to protect both the technician
and the customer. Correctly replace all missing protective
shields, including any removed for servicing convenience.
(2)When reinstalling the chassis and/or other assembly in the
cabinet, be sure to put back in place all protective devices,
including, but not limited to, nonmetallic control knobs,
insulating fish papers, adjustment and compartment covers/
shields, and isolation resistor/capacitor networks. Do not operate
this instrument or permit it to be operated without all protective
devices correctly installed and functioning.

(2) Be sure that there are no cabinet openings through which adults

or children might be able to insert their fingers and contact a
hazardous voltage. Such openings include, but are not limited
to, excessively wide cabinet ventilation slots, and an improperly
fitted and/or incorrectly secured cabinet back cover.

(3) Leakage Current Hot Check-With the instrument completely

reassembled, plug the AC line cord directly into a 120V AC
outlet. (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) 1270 (40.7). With the instrument’s AC switch first in the
ON position and then in the OFF position, measure from a known
earth ground (metal water pipe, conduit, etc.) to all exposed
metal parts of the instrument (antennas, handle brackets, metal
cabinets, screwheads, metallic overlays, control shafts, etc.),
especially any exposed metal parts that offer an electrical return
path to the chassis.
Any current measured must not exceed 0.5mA. Reverse the
instrument power cord plug in the outlet and repeat the test. See
Fig. 1.
Any measurements not within the limits specified herein indicate
a potential shock hazard that must be eliminated before returning
the instrument to the customer.

(4) Insulation Resistance Test Cold Check-(1) Unplug the power

supply cord and connect a jumper wire between the two prongs
of the plug. (2) Turn on the power switch of the instrument. (3)
Measure the resistance with an ohmmeter between the jumpered
AC plug and all exposed metallic cabinet parts on the instrument,
such as screwheads, antenna, control shafts, handle brackets,
etc. When an exposed metallic part has a return path to the
chassis, the reading should be between 1 and 5.2 megohm. When
there is no return path to the chassis, the reading must be infinite.
If the reading is not within the limits specified, there is the
possibility of a shock hazard, and the instrument must be repared
and rechecked before it is returned to the customer. See Fig. 2.

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

Fig. 1 AC Leakage Test

Fig. 2 Insulation Resistance Test

2) Read and comply with all caution and safety related notes on or

inside the cabinet, or on the chassis.

3) Design Alteration Warning-Do not alter or add to the mechanical

or electrical design of this instrument. Design alterations and
additions, including but not limited to, circuit modifications and
the addition of items such as auxiliary audio output connections,
might alter the safety characteristics of this instrument and create
a hazard to the user. Any design alterations or additions will
make you, the servicer, responsible for personal injury or
property damage resulting therefrom.

4) Observe original lead dress. Take extra care to assure correct

lead dress in the following areas:
(1) near sharp edges, (2) near thermally hot parts (be sure that
leads and components do not touch thermally hot parts), (3) the
AC supply, (4) high voltage, and (5) antenna wiring. Always
inspect in all areas for pinched, out-of-place, or frayed wiring,
Do not change spacing between a component and the printed-
circuit board. Check the AC power cord for damage.

5) Components, parts, and/or wiring that appear to have overheated

or that are otherwise damaged should be replaced with
components, parts and/ or wiring that meet original
specifications.
Additionally, determine the cause of overheating and/or damage
and, if necessary, take corrective action to remove any potential
safety hazard.

Antenna
Terminal

Exposed
Metal Part

ohm

ohmmeter