Jvc BR S422 E Service Manual Part 1

Page 1

JVB
SERVICE MANUAL

BR-S422E/SA-R200E

[TIME CODE GENERATOR(Option)]

SVHS $213

625

HiDFi

SPECIFICATIONS

GENERAL AUDIO

Format VHS/S-VHS Europe standard Number of tracks : 4 (Hi»Fi: 2/Normal: 2)

Signal system PAL Input (Switchable)

Power requirement DC 12 V Line/MIC : -60 L185, 3 k-ohms, balanced

Power consumption 13 W (Max. 38 W with camera) (Hi-Fi/Normal)

Dimensions 2875 (W) x 244 (H) x 131.5 (D) mm +4 st, 10 k-ohms, balanced

Weight 3.3 kg, 4.3 kg with battery and cassette (Hi-Fi/Normai)

Temperature Output
Operating 0°C to 40°C Line : -6 st. low impedance, unbalanced
Storage -20"C to 60°C (Hi-Fi/Normal)

Operating humidity 30% to 80 % Earphone : -60 to -12 st. 8 ohms

Tape width 12.65 mm Speaker : 0.5 W, 8 ohms

Tape speed 23.39 mrn/sec Dynamic range : More than 80 dB (Hi-Fi)

Recording and Frequency response : 20 to 20,000 Hz (Hi-Fi)

Playback time 180 min. with SE-180 so to 10,000 Hz (Normal)

so Signal-to-noise ratio : 42 dB (NR-oft, Normal at 3 % distorsion)
VID

Y/C Input (50~pin camera connector)
Y :

0
Output
Composite
Y/C
Signal-to-noise ratio :

Horizontal resolution :

1.0 Vp-p, 75 ohms. unbalanced
0.3 Vp-p (burst), 75 ohms,
unbalanced

1.0 Vp-p, 75 ohms, unbalanced (BNC)
Y: 1.0 Vp-p, 75 ohms. unbalanced
C: 0.3 Vp-p (burst), 75 ohms.
unbalanced

45 dB

(Hohde and Schwarz noise meter)
More than 400 lines (S-VHS)

More than 250 lines (VHS)

Wow & flutter : Less than 0.007 % WRMS (Hi-Fi)
Less than 0.15 % WRMS (Normal)

ACCESSORIES
Provided accessory : Carrying handle x 1

Design and specifications subject to change without notice.

COPYRIGHT © 1993 VICTOR COMPANY OF JAPAN, LTD.

No. 9288
November 1993

Page 2

TABLE OF CONTENTS

Section Title Page

Important Safety Precautions
INSTRUCTIONS
1. GENERAL DESCRIPTION AND DISASSEMBLV

1.1 REMOVAL OF ENCLOSURE PARTS.
.1.1 Cassette paneI assV .......

I
1 1 2 Left 51de cover
1 1 3 Battery holoer assy
1 1.4 Top cover assv . .
1 1.5 RIght sIde cover assy . H
1 1.6 Front cover assv ......
11.7 Rear panel . 1-2
I 1.8 Connector box assy 1-2
1.1.9 Bottom cover assy
1.2 REMOVAL OF MAIN BOARDS
12.1 Group A ........................
1.2.2 GroupB .......
1.2.3 GroupC .. .....
12.4 Group D .
1.2.5 GroupE .....
1.3 REMOVAL OF CASSETTE HOUSING .. ...
1,4 INTERNAL SWITCHES
141 E] VIDEO board ,
1.42 [E] AUTO E0 board ,.,
1.4 3 @ AUDIO board ........
1.44 @I DISPLAY board... ........................
1.4 5 131E TIME CODE board ISA-RZOOE. OpIIohal) .
1.5 HOUR METER DISPLAY ......

1.5.1 How to reset the hour meter .....
1 6 BATTERY CONNECTOR ............
17 EMERGENCY EJECT ........
TABLE OF SCREWS USED IN THIS SET

18
1'9

2, MECHANISM ADJUSTMENT

21 PREPARATION. .2-1
2.1.1 PrecautIonsu . . .2-1
2.1.2 Jigs and speCIaI tools for mechanism adjustment . 2-1
2.1.3 SpecIfIcatIDns of aIIgnmehttapes ..... . 2-1

2.2 PERIODIC REPLACEMENT OF MAIN PARTS .. . 2-2
2.2.1 Location of mam parts ................ .. 2-3

2.2.2 Maintenance step of man pans

2.2.3 AdIustmems requIred aIter replacement of drum

assembly ........ . .......

2.2.4 AdIustmem required after repIacement ofA/C head .. 2-5

2 2 5 CleahIng . . .

2. 2. 6 OIIIng and greasing ........ .
2,3 REPLACEMENT OF MAIN PARTS..

2.4 REASSEMBLING OF MECHANISM ..

..2-14

2.5 TAPE TENSION ADJUSTMENT.
2 6 INTERCHANGEABILITY ADJUSTMENT . .. 2-15
2.7 ADJUSTMENT OF TAPE TRANSPORT SYSTEM ........ . 2-20
2 8 TABLE OF SCREWS AND SLIT WASHERS USED

IN THIS SET ................ . ......... .....2-21

Section Title Page

3. ELECTRICAL ADJUSTMENT

31 PRECAUTIONS .. ....... 3.1
31 1 RequIred tools and test Instruments .3-1
31.2 Specrflcauon of alIgnmerIt tapes . 3-2

31 3 SIgnaI requIred for vxdeo system adlustment 3-3

3.1.4 InitiaI signaI of swmches
3.2 REGULATOR CIRCUIT ..........
3.3 SERVO CIRCUIT
3.4 AUDIO CIRCUIT
3.5 VIDEO CIRCUIT
LOCATION OF TR & VR

4. DIAGRAMS AND CIRCUIT BOARDS
4.1 FOREWOED ...................................................... .41
4.1.1 Expressmn ofw1ring . ........
4.1.2 SighaI IIow on the dragram .
4.1 3 Measurement of voItage and waveform
4.14 UhIt oIvaIue .. .
41 5 CIrcuIt board IocatIorIs ,
41 6 Shapes of tranSIstor & dIodes ..
4 2 MOTHER CIRCUIT BOARD .. .
4,3 OVERALL WIRING DIAHGRAM ..................
4.4 VIDEO BLOCK DIAGRAM
4,5 AUDIO BLOCK DIAGRAM
4.6 SYSCON/SERVO BLOCK DIAGRAM 11/2).
4.7 VIDEO SCHEMATIC DIAGRAM (1/3) .....
48 VIDEO CIRCUIT BOARD .. . ..
4.9 C. RF SCHEMATIC DIAGRAM
4.10 C RFCIRCUIT BOARD
4.11 AUTO EO SCHEMATIC DIAGRAM
4.12 AUTO EO CIRCUIT BOARD .......
4.13 PRE/REC SCHEMATIC DIAGRAM
4.14 PRE/REC CIRCUIT BOARD ..
4.15 PRE/REC JUNC SCHEMATIC DIAGRAM AND
CIRCUIT BOARD .................
416 POWER CTL SCHEMATIC DIAGRAM AND CIRCUIT

BOARD .................................... .. 423
417 AUDIO SCHEMATIC DIAGRAM I1/2I .4-24
4.18 AUDIO CIRCUIT BOARD .............. .. 4-26
4.19 SYSCON/SERVO SCHEMATIC DIAGRAM .. 4-28

4.20 SYSCON/SERVO CIRCUIT BOARD ........ . 4 28
4.21 50 PIN SCHEMATIC DIAGRAM AND CIRCUIT BOARD. 4 30
4 22 OPERATION SCHEMATIC DIAGRAM AND CIRCUIT

BOARD ..... .....................
4.23 REGULATOR SCHEMATIC DIAGRAM
4.24 REGULATOR CIRCUIT BOARD
4.25 MDA SCHEMATIC DIAGRAM .....
4.26 MODE SENSOR MDA MECHA IF MECHAJUNC

END SENSOR, START SENSOR. MDA JUNC, POWER SW.

A/C HEAD, REEL SENSOR CIRCUIT BOARDS ............. 435
4 27 CONNECTOR CIRCUIT BOARD ................ 4-35
4.28 MECHA IF, MECHA JUNC SCHEMATIC DIAGRAM 4-36
429 LCD SCHEMATIC DIAGRAM . ................ 4-37
4 30 TIME CODE SCHEMATIC DIAGRAM [SA RZOOE OPTION) 4 38
4 31 TIME CODE CIRCUIT BOARD ISA-R200E OPTION) 4- 39
4.32 IC BLOCK DIAGRAM . ... . ....... 4-40

4.31
4-32
4.33
4-34