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JVC SR-S365U User Manual

JVC SR-S365U
56 pages
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fs
gain
“fe
pares
US
ts
This
service
manual
describes
only
the
matters
that
are
different
from
the
SR-S365U.
On
servicing,
refer
to
the
service
manual
(No.
9330)
for
the
SR-S365U
together
with
this.
COPYRIGHT
©
1998
VICTOR
COMPANY
OF
JAPAN,
LTD.
No.
9356
June
1998
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JVC SR-S365U Specifications

General IconGeneral
Video SystemNTSC
Weight8.8 lbs
TypeVCR
Heads4
AudioHi-Fi Stereo
Remote ControlYes
Video FormatS-VHS, VHS
Recording SpeedSP, LP

Summary

Important Safety Precautions

Precautions during Servicing

Guidelines for safe servicing procedures, including handling of parts and wiring.

Crimp type wire connector

Detailed steps for using crimp-type wire connectors safely and correctly.

Safety Check after Servicing

Insulation resistance test

Verifies insulation resistance between exposed parts and power cord prongs.

Dielectric strength test

Checks dielectric strength between exposed parts and power cord prongs.

Clearance distance

Confirms specified clearance between soldered terminals and metallic parts.

Leakage current test

Measures leakage current between ground/plug prongs and accessible parts.

Grounding (Class I model only)

Confirms grounding impedance between AC inlet earth pin and exposed parts.

SECTION 1 SERVICE CAUTION

1.1 DIFFERENCE BETWEEN SR-S365U AND SR-S365U(A)

Details specific differences in parts and labels between SR-S365U and SR-S365U(A) models.

SECTION 2 MECHANISM REPAIR/ADJUSTMENT PROCEDURES

2.1 BEFORE MAKING REPAIR/ADJUSTMENT

Precautions, tape unloading, required tools, and alignment tape specifications.

2.2 MAINTENANCE AND CHECK

Identification of main mechanical parts, and procedures for cleaning and lubrication.

2.3 REPLACEMENT OF MAIN PARTS

Step-by-step instructions for removing and replacing major mechanical components.

2.4 HOW TO MOUNT THE MAIN PARTS

Procedures for mounting main mechanism parts with phase adjustment.

2.5 INTERCHANGEABILITY ADJUSTMENT

Procedures for interchangeability adjustment after part replacement for optimal performance.

SECTION 3 ELECTRICAL ADJUSTMENT

3.1 PRECAUTION

Precautions for performing electrical adjustments, requiring proper equipment.

3.1.1 Required test equipment

Lists essential test equipment for electrical adjustments.

3.1.2 Required adjustment tools

Lists specific tools needed for electrical adjustments.

3.1.4 Signals required for video system adjustment

Specifies signals like color bars and video sweep for video adjustments.

3.2 SWITCHING REGULATOR CIRCUIT

Adjustment for the 5V DC output voltage of the switching regulator.

3.3 SERVO CIRCUIT

Adjustments related to the servo circuit, including PB switching point.

3.3.1 PB switching point

Procedure for automatic and manual adjustment of the PB switching point.

3.3.2 Slow tracking preset

Steps for setting slow tracking for SP, EP, and REV modes to minimize noise.

3.4 VIDEO CIRCUIT

Overview of video circuit adjustments using the EVR system.

3.4.1 AGC Y level

Adjusting the AGC Y level to a specified voltage.

3.4.2 White/dark clip (S-VHS/VHS)

Adjusting white and dark clip levels for S-VHS and VHS modes.

3.4.3 Sub emphasis input level

Adjusting the sub emphasis input level.

3.4.4 Carrier/deviation (S-VHS/VHS)

Adjusting carrier and deviation for S-VHS and VHS signals.

3.4.5 PB Y level (S-VHS/VHS)

Adjusting the PB Y level for S-VHS and VHS playback.

3.4.6 SP/EP REC color level

Adjusting the REC color level for SP and EP modes.

3.4.7 S-VHS VIDEO EQ

Adjusting S-VHS video equalization for optimal signal.

3.4.8 AFC CLOCK

Adjusting AFC clock for proper video signal timing.

3.5 PRE/REC CIRCUIT

Notes on REC FM level adjustment for the pre/rec circuit.

3.6 AUDIO CIRCUIT

Procedures for adjusting audio REC FM level and audio EE level.

3.6.1 Audio REC FM level

Adjusting audio record FM level using a sound level meter.

3.6.2 Audio EE level

Adjusting audio EE level for optimal sound output.

3.7 Y/C SEP CIRCUIT

Adjusting digital I/O level for the Y/C separation circuit.

3.7.1 Digital I/O level

Procedure for adjusting digital I/O levels for Y/C separation.

SECTION 4 CHARTS AND DIAGRAM

4.1 OVERALL WRITING DIAGRAM

A schematic showing the overall wiring connections of the unit.

4.2 MAIN(SYSCON) CIRCUIT BOARD SCHEMATIC DIAGRAM

Schematic diagram for the main SYSCON circuit board.

4.3 MAIN(SERVO) CIRCUIT BOARD SCHEMATIC DIAGRAM

Schematic diagram for the main servo circuit board.

4.4 MAIN(VIDEO) CIRCUIT BOARD SCHEMATIC DIAGRAM

Schematic diagram for the main video circuit board.

4.5 MAIN(AUDIO) CIRCUIT BOARD SCHEMATIC DIAGRAM

Schematic diagram for the main audio circuit board.

4.6 MAIN CIRCUIT BOARD

Layout diagram for the main circuit board, showing component placement.

4.7 FG AMP CIRCUIT BOARD SCHEMATIC DIAGRAM

Schematic diagram for the FG AMP circuit board.

4.8 FG AMP CIRCUIT BOARD

Layout diagram for the FG AMP circuit board.

4.9 IC BLOCK DIAGRAMS

Block diagrams illustrating the function of various ICs used in the unit.

SECTION 5 EXPLODED VIEWS AND PARTS LIST

5.1 CABINET AND CHASSIS ASSEMBLY M2

Exploded view of the cabinet and chassis assembly, showing part locations.

5.2 CABINET AND CHASSIS ASSEMBLY PARTS LIST M2

Detailed parts list for the cabinet and chassis assembly.

5.3 MECHANISM ASSEMBLY M4

Exploded view of the mechanism assembly, showing part identification and lubrication points.

5.4 MECHANISM ASSEMBLY PARTS LIST M4

Detailed parts list for the mechanism assembly.

SECTION 6 ELECTRICAL PARTS LIST

RESISTORS

Explanation of resistor notation and list of common resistor types.

CAPACITORS

Explanation of capacitor notation and list of common capacitor types.

6.1 MAIN BOARD ASSEMBLY PARTS LIST 03

List of components for the main board assembly, including ICs, diodes, and resistors.

6.2 FG AMP BOARD ASSEMBLY PARTS LIST 5 6

Parts list for FG AMP board assembly, including ICs, diodes, resistors, and capacitors.

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