JVC HRS9850MS - Service Manual Immediate Download

SERVICE MANUAL

No.82888

July 2001

HR-S9850MS

MAGNETOSCOPE

CARACTÉRISTIQUES TECHNIQUES

GÉNÉRALES

Alimentation

: CA 220 V 240 Vd, 50 Hz/60 Hz

Consommation

Alimentation en marche

: 25 W

Alimentation en veille

: 4,8 W

Températures

Fonctionnement

: 5

°C à 40°C

Stockage

: -20

°C à 60°C

Position de fonctionnement

: Seulement horizontale

Dimensions (LxHxP)

: 435 mm x 105 mm x 343 mm

Poids

: 4,7 kg

Format

: Standard S-VHS/VHS PAL/SECAM

Largeur de bande : 12,65 mm

Vitesse de bande

(VN)

: 23,39 mm/s

(LD)

: 11,70 mm/s

(EP)*

: 7,80 mm/s

Durée maximale d'enregistrement

(VN)

: 240 mn avec une cassette vidéo

E-240

(LD)

: 480 mn avec une cassette vidéo

E-240

(EP)*

: 720 mn avec une cassette vidéo

E-240

* Signaux PAL seulement

VIDÉO/AUDIO

Système de signal : Signaux couleur PAL/SECAM et

signal monochrome CCIR,

625 lignes/50 trames

Système d'enregistrement

: Balayage hélicoïdal DA4

(Double Azimuth)

Entrée

: 0,5 Vcc à 2,0 Vcc, 75 ohms,

asymétrique

Sortie

: 1,0 Vcc, 75 ohms, asymétrique

Rapport signal/bruit: 45 dB

Résolution horizontale:400 lignes (S-VHS-PAL, VN/LD)

250 lignes (VHS-PAL, VN/LD)

350 lignes (S-VHS-PAL, EP)

220 lignes (VHS-PAL, EP)

240 lignes (VHS-SECAM, VN/LD)

Gamme de fréquence : 70 Hz à 10.000 Hz (Audio normal)

20 Hz à 20.000 Hz (Audio Hi-Fi)

Entrée/sortie

: Connecteurs péritélévision à 21

broches:

ENTREE/SORTIE x 1,

ENTREE/DECODEUR x 1

Connecteurs RCA:

ENTREE VIDEO x 1,

ENTREE AUDIO x 1,

SORTIE AUDIO x 1

Connecteurs S-Vidéo:

ENTREE x 1, SORTIE x 1

SYNTONISEUR

Système de syntonisation

: Syntoniseur à synthèse de

fréquence

Capacité de canaux TV

: 99 positions (+ position AUX)

Canaux couverts

MINUTERIE

Référence de l'horloge

: Par quartz

Capacité de programmation

: Minuterie sur 1 an/8 programmes

Durée de soutien mémoire

:10 mn

ACCESSOIRES

Accessoires fournis : Câble RF,

Câble S-Vidéo,

Câble péritélévision à 21 broches,

Contrôleur satellite,

Boîtier de télécommande à

infrarouge,

Pile "R6" x 2

Gamme

SECAM L

PAL B/G

Fréquence

Canaux

Fréquence

Canaux

VHF

(LOW)

49 MHz

65 MHz

2 4

47 MHz

89 MHz

E2 E4

X, Y, Z

VHF

(HIGH)

104 MHz

300 MHz

5 10

CATV

104 MHz

300 MHz

E5 E12

S1 S20

M1 M10

U1 U10

Hyper

300 MHz

470 MHz

CATV

302 MHz

470 MHz

S21 S41

UHF

470 MHz

862 MHz

21 69

470 MHz

862 MHz

E21 E69

Les caractéristiques techniques sont pour le mode VN à

moins d'indication contraire.

Présentation et caractéristiques modifiables sans préavis.

ATTENTION

Ce magnétoscope contient des microprocesseurs. Des bruits

électroniques externes ou des interférences peuvent causer

un mauvais fonctionnement. Dans de tels cas, couper

l'alimentation et débrancher le cordon d'alimentation. Puis

le rebrancher et remettre l'alimentation. Sortir la cassette.

Après contrôle de la cassette, faire fonctionner l'appareil

comme d'ordinaire.

TABLE OF CONTENTS

Section

Title

Page

Section

Title

Page

Important Safety Precautions

INSTRUCTIONS

1. DISASSEMBLY

1.1 Disassembly flow chart ..................................................... 1-1

1.2 How to read the disassembly and assembly ..................... 1-1

1.3 Disassembly/assembly method ........................................ 1-1

1.4 Service position ................................................................. 1-4

1.4.1 How to set the "Service position" ................................. 1-4

1.4.2 Precautions for cassete loding in the "Service position"

1.4.3 Cassete loding and ejection methods in the "Service position"

1.5 Mechanism service mode ................................................. 1-4

1.5.1 How to set the "Mechanism service mode" .................. 1-4

1.6 Jig RCU mode ................................................................... 1-4

1.6.1 Setting the Jig RCU mode ........................................... 1-4

1.6.2 Setting the User RCU mode ........................................ 1-4

1.7 Emergency display function .............................................. 1-5

1.7.1 Displaying the EMG information .................................. 1-5

1.7.2 Clearing the EMG history ............................................. 1-5

1.7.3 EMG content description .............................................. 1-6

1.7.4 EMG detail information <1> ......................................... 1-7

1.7.5 EMG detail information <2> ......................................... 1-8

1.8 Servicing the video navigation function .............................. 1-9

1.8.1 Copying the video navigation data ................................ 1-9

1.8.2 Erasing the video navigation data ............................... 1-10

1.8.3 Factory setting level during shipment ......................... 1-10

2. MECHANISM ADJUSTMENT

2.1 Before starting repair and adjustment ............................... 2-1

2.1.1 Precautions .................................................................. 2-1

2.1.2 Checking for proper mechanical operations ................ 2-1

2.1.3 Manually removing the cassette tape .......................... 2-1

2.1.4 Jigs and tools required for adjustment ......................... 2-2

2.1.5 Maintenance and inspection ........................................ 2-3

2.2 Replacement of major parts .............................................. 2-6

2.2.1 Before starting disassembling

(Phase matching between mechanical parts) ................ 2-6

2.2.2 How to set the "Mechanism assembling mode" ........... 2-6

2.2.3 Cassette holder assembly ............................................ 2-6

2.2.4 Pinch roller arm assembly ............................................ 2-8

2.2.5 Guide arm assembly and press lever assembly .......... 2-8

2.2.6 A/C head ...................................................................... 2-8

2.2.7 Loading motor .............................................................. 2-8

2.2.8 Capstan motor ............................................................. 2-9

2.2.9 Pole base assembly (supply or take-up side) .............. 2-9

2.2.10 Rotary encoder ........................................................ 2-10

2.2.11 Clutch unit ................................................................ 2-10

2.2.12 Change lever assembly, direct gear, clutch gear

and coupling gear ................................................... 2-10

2.2.13 Link lever .................................................................. 2-11

2.2.14 Cassette gear, control cam and worm gear ............. 2-11

2.2.15 Control plate ............................................................. 2-11

2.2.16 Loading arm gear (supply or take-up side)

and loading arm gear shaft .................................... 2-12

2.2.17 Take-up lever, take-up head and control plate guide 2-13

2.2.18 Capstan brake assembly ......................................... 2-13

2.2.19 Sub brake assembly (take-up side) ......................... 2-13

2.2.20 Main brake assembly (take-up side), reel disk

(take-up side) and main brake assembly (supply side) ... 2-13

2.2.21 Tension brake assembly, reel disk (supply side)

and tension arm assembly ...................................... 2-14

2.2.22 Idler lever, idler arm assembly ................................. 2-14

2.2.23 Stator assembly ....................................................... 2-14

2.2.24 Rotor assembly ........................................................ 2-14

2.2.25 Upper drum assembly .............................................. 2-15

2.3 Compatibility adjustment ................................................. 2-16

2.3.1 FM waveform linearity ................................................ 2-16

2.3.2 Height and tilt of the A/C head ................................... 2-17

2.3.3 A/C head phase (X-value) .......................................... 2-17

2.3.4 Standard tracking preset ............................................ 2-18

2.3.5 Tension pole position .................................................. 2-18

3. ELECTRICAL ADJUSTMENT

3.1 Precaution ......................................................................... 3-1

3.1.1 Required test equipments ............................................ 3-1

3.1.2 Required adjustment tools ........................................... 3-1

3.1.3 Color (colour) bar signal,Color (colour) bar pattern ..... 3-1

3.1.4 Switch settings and standard precautions ................... 3-1

3.1.5 EVR Adjustment ........................................................... 3-1

3.2 Servo circuit ...................................................................... 3-2

3.2.1 Switching point ............................................................. 3-2

3.2.2 Slow tracking preset ..................................................... 3-2

3.3 Video circuit ....................................................................... 3-2

3.3.1 D/A level ....................................................................... 3-2

3.3.2 EE Y/PB Y (S-VHS/VHS) level ..................................... 3-3

3.3.3 REC color (colour) level ............................................... 3-3

3.3.4 Video EQ (Frequency response) .................................. 3-4

3.3.5 Auto picture initial setting ............................................. 3-4

3.4 Audio circuit ....................................................................... 3-4

3.4.1 Audio REC FM ............................................................. 3-4

3.5 PAL/SECAM converter circuit ............................................ 3-5

3.5.1 fH VCO ......................................................................... 3-5

3.5.2 DEMOD Fo ................................................................... 3-5

3.5.3 Colour difference level .................................................. 3-5

3.5.4 PAL burst position ......................................................... 3-6

3.5.5 SECAM BELL ................................................................ 3-6

4. CHARTS AND DIAGRAMS

NOTES OF SCHEMATIC DIAGRAM ...................................... 4-1

CIRCUIT BOARD NOTES ...................................................... 4-2

4.1 BOARD INTERCONNECTIONS ....................................... 4-3

4.2 MAIN (VIDEO/AUDIO) SCHEMATIC DIAGRAM .............. 4-5

4.3 MAIN (SYSCON) SCHEMATIC DIAGRAM ....................... 4-7

4.4 MAIN (SW.REG) SCHEMATIC DIAGRAM ........................ 4-9

4.5 MAIN (TUNER) SCHEMATIC DIAGRAM ........................ 4-11

4.6 CONNECTION SCHEMATIC DIAGRAM ........................ 4-13

4.7 3D/TBC(2M) SCHEMATIC DIAGRAM ............................ 4-15

4.8 TERMINAL SCHEMATIC DIAGRAM .............................. 4-17

4.9 DEMODULATOR SCHEMATIC DIAGRAM ..................... 4-19

4.10 S-SUB SCHEMATIC DIAGRAM ................................... 4-21

4.11 NAVIGATION SCHEMATIC DIAGRAM ......................... 4-23

4.12 SW/DISPLAY, REC SAFETY, JACK, ADV.JOG

SCHEMATIC DIAGRAMS ............................................ 4-25

4.13 SECAM SCHEMATIC DIAGRAM[HR-S9850MS] .......... 4-27

4.14 SECAM CIRCUIT BOARD[HR-S9850MS] ..................... 4-28

4.15 P/S CONVERTER SCHEMATIC DIAGRAM

[HR-S9850MS] .............................................................. 4-29

4.16 P/S CONVERTER CIRCUIT BOARD[HR-S9850MS] .... 4-31

4.17 MAIN AND AUDIO ERASE CIRCUIT BOARD .............. 4-33

4.18 SW/DISPLAY, REC SAFETY, JACK, ADV.JOG,

DEMODULATOR AND S-SUB CIRCUIT BOARDS ..... 4-35

4.19 3D DIGITAL/2M CIRCUIT BOARD ................................ 4-37

4.20 TERMINAL CIRCUIT BOARD ........................................ 4-38

4.21 NAVIGATION CIRCUIT BOARD .................................... 4-39

4.22 FDP GRID ASSIGNMENT AND ANODE CONNECTION .. 4-40

4.23 REMOTE CONTROLLER SCHEMATIC DIAGRAM ..... 4-41

4.24 CPU PIN FUNCTION .................................................... 4-42

4.25 WAVEFORMS ............................................................... 4-43

4.26 VOLTAGE CHARTS ...................................................... 4-45

4.27 SYSTEM CONTROL BLOCK DIAGRAM ...................... 4-47

4.28 VIDEO BLOCK DIAGRAM ............................................ 4-49

4.29 AUDIO BLOCK DIAGRAM ............................................ 4-53

5. PARTS LIST

5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ............ 5-1

5.2 FINAL ASSEMBLY <M2> .................................................. 5-2

5.3 MECHANISM ASSEMBLY <M4> ...................................... 5-4

5.4 ELECTRICAL PARTS LIST ............................................... 5-6

MAIN BOARD ASSEMBLY <03> ............................................ 5-6

3D DIGITAL/2M BOARD ASSEMBLY <05> .......................... 5-13

TERMINAL BOARD ASSEMBLY <06> ................................. 5-14

A/C HEAD BOARD ASSEMBLY <12> .................................. 5-16

DEMOD BOARD ASSEMBLY <14> ...................................... 5-16

S-SUB BOARD ASSEMBLY <15> ......................................... 5-16

NAVIGATION BOARD ASSEMBLY <19> ............................... 5-17

SW/DISPLAY BOARD ASSEMBLY <28> ............................... 5-18

REC SAFETY BOARD ASSEMBLY <32> .............................. 5-18

JACK BOARD ASSEMBLY <36> .......................................... 5-19

ADV.JOG BOARD ASSEMBLY <38> .................................... 5-19

AUDIO ERASE BOARD ASSEMBLY <46> ........................... 5-19

LOADING MOTOR BOARD ASSEMBLY <55> ..................... 5-19

P/S CONVERTER BOARD ASSEMBLY <87> ....................... 5-19

SECAM BOARD ASSEMBLY <88> ....................................... 5-22

Important Safety Precautions

Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes

of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the

following precautions when a set is being serviced.

Fig.1

1. Locations requiring special caution are denoted by labels and

inscriptions on the cabinet, chassis and certain parts of the

product. When performing service, be sure to read and com-

ply with these and other cautionary notices appearing in the

operation and service manuals.

2. Parts identified by the

symbol and shaded (

) parts are

critical for safety.

Replace only with specified part numbers.

Note: Parts in this category also include those specified to com-

ply with X-ray emission standards for products using

cathode ray tubes and those specified for compliance

with various regulations regarding spurious radiation

emission.

3. Fuse replacement caution notice.

Caution for continued protection against fire hazard.

Replace only with same type and rated fuse(s) as specified.

4. Use specified internal wiring. Note especially:

1) Wires covered with PVC tubing

2) Double insulated wires

3) High voltage leads

5. Use specified insulating materials for hazardous live parts.

Note especially:

1) Insulation Tape

3) Spacers

5) Barrier

2) PVC tubing

4) Insulation sheets for transistors

6. When replacing AC primary side components (transformers,

power cords, noise blocking capacitors, etc.) wrap ends of

wires securely about the terminals before soldering.

Power cord

Fig.2

10. Also check areas surrounding repaired locations.

11. Products using cathode ray tubes (CRTs)

In regard to such products, the cathode ray tubes themselves,

the high voltage circuits, and related circuits are specified for

compliance with recognized codes pertaining to X-ray emission.

Consequently, when servicing these products, replace the cath-

ode ray tubes and other parts with only the specified parts.

Under no circumstances attempt to modify these circuits.

Unauthorized modification can increase the high voltage value

and cause X-ray emission from the cathode ray tube.

12. Crimp type wire connector

In such cases as when replacing the power transformer in sets

where the connections between the power cord and power

transformer primary lead wires are performed using crimp type

connectors, if replacing the connectors is unavoidable, in or-

der to prevent safety hazards, perform carefully and precisely

according to the following steps.

1) Connector part number : E03830-001

2) Required tool : Connector crimping tool of the proper type

which will not damage insulated parts.

3) Replacement procedure

(1) Remove the old connector by cutting the wires at a point

close to the connector.

Important : Do not reuse a connector (discard it).

Fig.7

cut close to connector

Fig.3

(2) Strip about 15 mm of the insulation from the ends of

the wires. If the wires are stranded, twist the strands to

avoid frayed conductors.

15 mm

Fig.4

(3) Align the lengths of the wires to be connected. Insert

the wires fully into the connector.

Connector

Metal sleeve

Fig.5

(4) As shown in Fig.6, use the crimping tool to crimp the

metal sleeve at the center position. Be sure to crimp fully

to the complete closure of the tool.

Precautions during Servicing

7. Observe that wires do not contact heat producing parts

(heatsinks, oxide metal film resistors, fusible resistors, etc.)

8. Check that replaced wires do not contact sharp edged or

pointed parts.

9. When a power cord has been replaced, check that 10-15 kg of

force in any direction will not loosen it.

1.25

2.0

5.5

Crimping tool

Fig.6

(5) Check the four points noted in Fig.7.

Not easily pulled free

Crimped at approx. center

of metal sleeve

Conductors extended

Wire insulation recessed

more than 4 mm

S40888-01

Safety Check after Servicing

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been

returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compli-

ance with safety standards.

1. Insulation resistance test

Confirm the specified insulation resistance or greater between power cord plug prongs and

externally exposed parts of the set (RF terminals, antenna terminals, video and audio input

and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.

2. Dielectric strength test

Confirm specified dielectric strength or greater between power cord plug prongs and exposed

accessible parts of the set (RF terminals, antenna terminals, video and audio input and output

terminals, microphone jacks, earphone jacks, etc.). See table 1 below.

3. Clearance distance

When replacing primary circuit components, confirm specified clearance distance (d), (d') be-

tween soldered terminals, and between terminals and surrounding metallic parts. See table 1

below.

4. Leakage current test

Confirm specified or lower leakage current between earth ground/power cord plug prongs

and externally exposed accessible parts (RF terminals, antenna terminals, video and audio

input and output terminals, microphone jacks, earphone jacks, etc.).

Measuring Method : (Power ON)

Insert load Z between earth ground/power cord plug prongs and externally exposed accessi-

ble parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and

following table 2.

5. Grounding (Class 1 model only)

Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in,

Video out, Audio in, Audio out or Fixing screw etc.).

Measuring Method:

Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.

Chassis

Power cord,

primary wire

Region

USA & Canada

Europe & Australia

Grounding Impedance (Z)

0.1 ohm

0.5 ohm

AC inlet

Earth pin

Exposed accessible part

Milli ohm meter

Grounding Specifications

Fig. 10

Externally

exposed

accessible part

Fig. 9

Fig. 8

Clearance Distance (d), (d')

d, d'

3 mm

d, d'

4 mm

d, d'

3.2 mm

1 M

R 12 M/500 V DC

Dielectric Strength

AC 1 kV 1 minute

AC 1.5 kV 1 miute

AC 1 kV 1 minute

AC Line Voltage

100 V

100 to 240 V

110 to 130 V

200 to 240 V

Japan

USA & Canada

Europe & Australia

10 M

/500 V DC

Region

Insulation Resistance (R)

1 M

/500 V DC

AC 3 kV 1 minute

(Class 2)

AC 1.5 kV 1 minute

(Class 1)

4 mm

8 mm (Power cord)

6 mm (Primary wire)

Table 1 Specifications for each region

a, b, c

Leakage Current (i)

AC Line Voltage

100 V

110 to 130 V

220 to 240 V

Japan

USA & Canada

1 mA rms

Exposed accessible parts

Antenna earth terminals

Other terminals

0.5 mA rms

0.7 mA peak

2 mA dc

0.7 mA peak

2 mA dc

Europe & Australia

Region

Load Z

1 k

2 k

1.5 k

0.15

µF

50 k

Table 2 Leakage current specifications for each region

Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.

S40888-01