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JVC HR-S3911U User Manual

JVC HR-S3911U
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SERVICE MANUAL
No.82912
March 2002
HR-S2901U, HR-S2911U(C),
HR-S3901U,
HR-S3911U, HR-S3911U(C)
Regarding service information other than these sections, refer to the HR-S5901U service manual (No.82911).
Also, be sure to note important safety precautions provided in the service manual.
VIDEO CASSETTE RECORDER
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
SPECIFICATIONS
(The specifications shown pertain specifically to the model HR-S3901U.)
V15S0/S1
REW
FF
REC LINK
24HR QUICK
PROGRAM
POWER
DISPLAY
SP/EP
Specifications shown are for SP mode unless specified otherwise.
E. & O.E. Design and specifications subject to change without
notice.
GENERAL
Power requirement : AC 120 V
d
, 60 Hz
Power consumption
Power on : 17 W
Power off : 1.5 W
Temperature
Operating : 5°C to 40°C (41°F to 104°F)
Storage : –20°C to 60°C (–4°F to140°F)
Operating position : Horizontal only
Dimensions (W x H x D) : 435 mm x 94 mm x 247 mm
(17-3/16" x 3-3/4" x 9-3/4")
Weight : 2.8 kg (6.2 lbs)
Format : S-VHS/VHS NTSC standard
Maximum recording time
SP : 210 min. with ST-210 video cassette
EP : 630 min. with ST-210 video cassette
VIDEO/AUDIO
Signal system : NTSC-type color signal and EIA
monochrome signal, 525 lines/
60 fields
Recording/Playback
system
: DA-4 (Double Azimuth) head helical
scan system
Signal-to-noise ratio : 45 dB
Horizontal resolution
VHS : 230 lines
S-VHS : 400 lines
Frequency range
Normal audio : 70 Hz to 10,000 Hz
Hi-Fi audio : 20 Hz to 20,000 Hz
Input/Output : RCA connectors (IN x 2, OUT x 1)
S-video connectors (IN x 1, OUT x 1)
TUNER
Tuning system : Frequency-synthesized tuner
Channel coverage
VHF : Channels 2–13
UHF : Channels 14–69
CATV : 113 Channels
RF output : Channel 3 or 4 (switchable; preset to
Channel 3 when shipped) 75 ohms,
unbalanced
TIMER
Clock reference : Quartz
Program capacity : 1-year programable timer/8 programs
Memory backup for timer is not supported.
ACCESSORIES
Provided accessories : Infrared remote control unit,
AA” battery x 2,
S-video cable (4-pin),
RF cable (F-type)

Table of Contents

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JVC HR-S3911U Specifications

General IconGeneral
BrandJVC
ModelHR-S3911U
CategoryVCR
LanguageEnglish

Summary

SPECIFICATIONS

GENERAL

General physical and power specifications for the VCR.

Important Safety Precautions

Precautions during Servicing

Critical safety guidelines for servicing the VCR.

SECTION 1 DISASSEMBLY

1.2 Removing the major parts

Steps for disassembling major external parts and assemblies.

SECTION 2 MECHANISM

2.1 Before disassembling

Notes and checks required before disassembling the mechanism.

2.2 Replacement of the main mechanism parts

Procedures for replacing major mechanism components.

2.2.2 A/C head

Procedures for removing and installing the A/C head assembly.

SECTION 3 ADJUSTMENT

3.1 Before adjustment

Precautions, test equipment, and initial setup for adjustments.

3.2 Mechanism compatibility adjustment

Procedures for adjusting mechanism parts for compatibility.

3.3 Electrical adjustment

Procedures for electrical adjustments and circuit servicing.

SECTION 4 CHARTS AND DIAGRAMS

4.1 BOARD INTERCONNECTIONS

Diagram showing how different boards are connected.

4.2 MAIN (VIDEO/N.AUDIO) SCHEMATIC DIAGRAM

Schematic for the main video and audio processing circuits.

4.3 MAIN (S-SUB) SCHEMATIC DIAGRAM

Schematic for the main S-SUB circuit.

4.4 MAIN (SYSCON) SCHEMATIC DIAGRAM

Schematic for the system control (microcomputer) circuit.

4.5 MAIN (SW.REG) SCHEMATIC DIAGRAM

Schematic for the main switching regulator circuit.

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