JVC HR-J777MS User Manual

SERVICE MANUAL
No. 82811
July 2000
HR-J271MS/J471MS/J677MS/J777MS
SPECIFICATIONS (The specifications shown pertain specifically to the model HR-J777MS/J677MS)
VIDEO CASSETTE RECORDER
Printed in Japan
VICTOR COMPANY OF JAPAN, LIMITED
VIDEO DIVISION
S40894
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.
HR-J271MS/J471MS/J677MS/J777MS
No. 82811
PAL NTSC
TM
TM
SP/LP/EP
DISLAY
PR
COLOUR SYSTEM
REC LINK
VIDEO
(
MONO
)
L–AUDIO–R
STANDBY/ON
REVIEW
SP
+
8
4
0
6
15dB
NORM
MENU
123
456
7
89
0
1
O
K
VCR
CABLE/
DVD/SAT
TV
2
4
EXPRESS
3
PROG
30 SEC
TV PR –
TV PR +
+
TV
TV
–
E
N
T
E
R
/
E
N
T
R
E
E
PR
DATE
STOP
FIN
START
DEBUT
0000
AUX
DAILY/QTDN.
VPS/PDC
WEEKLY/HEBDO
AUDIO
TV/VCR
GENERAL
Power requirement
Rating : AC 110 V – 240 V`, 50/60 Hz
Operating : AC 90 V – 260 V`, 50/60 Hz
Power consumption : 19 W
Temperature
Operating : 5°C to 40°C
Storage : –20°C to 60°C
Operating position : Horizontal only
Dimensions (WxHxD) : 400 mm x 94 mm x 278 mm
Weight : 3.3 kg
Format : VHS standard
Maximum recording time
(SP) : 240 min. with E-240 video cassette
(PAL/MESECAM)
: 160 min. with T-160 video cassette
(NTSC)
(LP) : 480 min. with E-240 video cassette
(PAL/MESECAM)
(EP) : 480 min. with T-160 video cassette
(NTSC)
VIDEO/AUDIO
Signal system : PAL-type colour signal and
CCIR monochrome signal,
625 lines 50 fields
: NTSC colour and EIA
monochrome signals,
525 lines/60 fields
Recording system : DA-4 (Double Azimuth)
head helical scan system
Signal-to-noise ratio : 45 dB
Horizontal resolution : 250 lines (PAL/MESECAM)
: 220 lines (NTSC)
Frequency range : 70 Hz to 10,000 Hz (Normal audio)
20 Hz to 20,000 Hz (Hi-Fi audio)
Input/Output : RCA connectors (IN x 2, OUT x 1)
TUNER/TIMER
TV channel storage
capacity : 99 positions (+AUX position)
Tuning system : Frequency synthesized tuner
Channel coverage : VHF
(Low) 42 MHz – 175 MHz
(High)175 MHz – 470 MHz
UHF
470 MHz – 870 MHz
Aerial output : UHF channels (Adjustable
E28 – E60)
Memory backup time : Approx. 6 months
Estimated figure based on
supplied fresh battery; actual
performance may differ.
ACCESSORIES
Provided accessories : RF cable,
Infrared remote control unit,
"R6/UM-3" battery x 2,
Lithium battery CR2025,
Conversion plug*
*Not provided in certain areas.
www.freeservicemanuals.info
4/5/2017
Digitized in Heiloo Netherland

JVC HR-J777MS Specifications

General

Brand	JVC
Model	HR-J777MS
Type	VCR
Video Format	VHS
Recording Speed	SP/LP
Playback Speed	SP/LP
Playback Head	4-Head
Audio System	Hi-Fi Stereo
Remote Control	Yes
Timer Recording	Yes
Tuner	Yes
Power Supply	AC 220-240V, 50Hz

Summary

Specifications

Important Safety Precautions

Precautions During Servicing

General safety measures for servicing equipment and handling parts.

Safety Check After Servicing

Insulation Resistance Test

Leakage Current Test

Section 1: Disassembly

Disassembly/Assembly Method

1.4 Service Position

How to Remove Mechanism and Main Board Assemblies

1.5 Mechanism Service Mode

How to Set Mechanism Service Mode

1.6 Emergency Display Function

Displaying Emergency Information

1.6.3 Emergency Content Description

1.6.4 Emergency Detail Information 1

1.6.5 Emergency Detail Information 2

Section 2: Mechanism Adjustment

2.1 Before Starting Repair and Adjustment

2.2 Replacement of Major Parts

2.2.1 Before Starting Disassembly (Phase Matching)

2.2.3 Cassette Holder Assembly

2. How to Install (Phase Matching)

2.3 Compatibility Adjustment

2.3.1 Checking/Adjustment of FM Waveform Linearity

Adjusting the FM waveform linearity for proper playback.

Section 3: Electrical Adjustment

3.1 Precaution

General precautions for electrical adjustments and required test equipment.

3.1.4 Switch Settings and Standard Precautions

3.2 Servo Circuit

Installing Your New Recorder

Basic Connections

Guides on connecting the recorder to a TV and power outlet.

Initial Settings

Procedures for initial setup including language and channel settings.

Safety First

Caution

Important cautions regarding power, voltage, and component handling.

Attention

Notes on SECAM signals, color compatibility, and power system.

Initial Settings (cont.)

Video Channel Set

Procedure to set the video channel for RF connection.

Auto Set Up

Guides user through setting language, clock, and tuner channels.

Clock Set

Steps to set the recorder's current time, date, and year.

Playback

Basic Playback

Explains the fundamental operation of playing back recorded tapes.

Playback (cont.)

Recording

Basic Recording

Steps for recording TV programs onto a video tape.

Recording (cont.)

B.E.S.T. Picture System

System that compensates tape condition for optimal recording/playback quality.

Instant Timer Recording (ITR)

Easy method to record for 30 mins to 6 hours, shutting off automatically.

Timer Recording (cont.)

G-CODE/SHOWVIEW System Setup

Setting up G-CODE numbers for automatic timer programming.

Express Timer Programming

Steps for programming timers for specific programs using the remote.

Check, Cancel and Replace Programmes

Procedures to check, cancel, or replace programmed timer recordings.

Auto Timer

How the auto timer engages and disengages automatically.

Guide Program Number Set

Procedure to enter guide program numbers for stations.

Automatic Satellite Program Recording

Tuner Set

Auto Channel Set

Automatically assigns receivable stations to PR +/- buttons.

Manual Channel Set

Delete A Channel

Swap Channel Positions

TV System Selection (Audio Issues)

Select TV System

Troubleshooting

Power Issues

Tape Transport Issues

Playback Issues

Solutions for playback problems like no picture, noise, or color loss.

Recording Issues

Timer Recording Issues

Remote Control