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Aiwa VX-S135 User Manual

Aiwa VX-S135
103 pages
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BASIC TAPE MECHANISM : OVD-6
INTEGRATED COLOR TV/VIDEO
CASSETTE RECORDER
VX-S135
S/M Code No. 09-995-325-1O1
U
SERVICE MANUAL
DATA
GENERAL
120V AC, 60Hz
80W
13.5 kg (29.7 lbs.)
435 mm (W) x 365 mm (D) x
384.5 mm (H)
(17 1/4 x 14 3/8 x 15 1/4 in.)
208 mm (W) x 211 mm (H)
(8 1/4 x 8 3/8 in.)
335 mm (diagonal) (13 1/4 in.)
Frequency synthesized tuner
VHF: 2 to 13
UHF: 14 to 69
CATV: 5A, A-1 to A-5, A to W,
W+1 to W+84
M
230 lines
75 ohms, unbalanced
5°C to 40°C
Rotary 2 head helical
scanning system
SPECIFICATIONS
NTSC color system, 525 lines,
60 fields
Azimuth 2 head
VHS video cassette
SP: 33.35 mm/sec
LP: 16.67 mm/sec
SLP: 11.12 mm/sec
SP: 3 hours with T-180 tape
LP: 6 hours with T-180 tape
SLP: 9 hours with T-180 tape
1.0Vp-p, 75 ohm, unbalanced
1.0Vp-p, 75 ohm, unbalanced
53dB (nominal)
–3.8dBs, 50K ohm
–3.8dBs, less than 50K ohm
3 tracks (Hi-Fi sound 2 tracks,
Normal sound 1 track)
Approx. 2 minutes 15 seconds
with T-120 tape
Approx. 1 minutes 48 seconds
with T-120 tape
VIDEO SIGNAL SYSTEM ................
VIDEO HEAD ...................................
USABLE CASSETTES .....................
TAPE SPEED ...................................
RECORDING/PLAYBACK TIME .....
VIDEO INPUT...................................
VIDEO OUTPUT ..............................
VIDEO S/N .......................................
AUDIO INPUT ..................................
AUDIO OUTPUT ..............................
AUDIO TRACK .................................
FAST-FORWARD TIME...................
REWIND TIME .................................
POWER REQUIREMENTS.................
POWER CONSUMPTION...................
WEIGHT ..............................................
DIMENSIONS ......................................
TV SECTION
PICTURE TUBE ..................................
TUNER SYSTEM ................................
CHANNEL COVERAGE ......................
TV SYSTEM ........................................
HORIZONTAL RESOLUTION ............
ANTENNA INPUT ...............................
VCR SECTION
OPERATING TEMPERATURE ...........
VIDEO RECORDING SYSTEM ..........
Design and specifications are subject to change without
notice.

Table of Contents

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Aiwa VX-S135 Specifications

General IconGeneral
BrandAiwa
ModelVX-S135
CategoryTV VCR Combo
LanguageEnglish

Summary

SPECIFICATIONS

SERVICING NOTICES ON CHECKING

DISASSEMBLY INSTRUCTIONS

REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS

Steps to remove main mechanical parts and printed circuit boards from the unit.

REMOVAL OF DECK PARTS

Detailed instructions for disassembling individual components within the VCR deck mechanism.

REMOVAL OF ANODE CAP

Procedure for safely removing the CRT anode cap, including discharge instructions.

KEY TO ABBREVIATIONS

SERVICE MODE LIST

PREVENTIVE CHECKS AND SERVICE INTERVALS

CONFIRMATION OF USING HOURS

Method to check the total operational time of the unit for maintenance scheduling.

CLEANING PROCEDURES

Instructions for cleaning critical components like tape heads and the tape path.

NOTE FOR THE REPLACING OF MEMORY IC

SERVICING FIXTURES AND TOOLS

PREPARATION FOR SERVICING

MECHANICAL ADJUSTMENTS

CONFIRMATION AND ADJUSTMENT

General procedures for confirming and adjusting mechanical operations of the unit.

TENSION POST POSITION ADJUSTMENT

Steps to adjust the tension post position for optimal tape handling.

PLAYBACK TORQUE AND BACK TENSION ADJUSTMENT

Procedures for measuring and adjusting playback torque and back tension.

MECHANISM ADJUSTMENT PARTS LOCATION GUIDE

Diagram showing the location of parts relevant to mechanical adjustments.

ELECTRICAL ADJUSTMENTS

ADJUSTMENT PROCEDURE

General guidelines and cautions for performing electrical adjustments on the unit.

BASIC ADJUSTMENTS (VCR SECTION)

Core VCR electrical adjustments including PG Shifter and RF AGC Delay.

PURITY AND CONVERGENCE ADJUSTMENTS

Procedures for fine-tuning CRT purity and convergence for optimal picture display.

TROUBLESHOOTING GUIDE

TV SECTION TROUBLESHOOTING

Diagnostic flowcharts for common TV section problems like power, picture, and sound issues.

VCR SECTION TROUBLESHOOTING

Diagnostic flowcharts for common VCR section problems like playback, recording, and tape loading issues.

IC DESCRIPTION

SERVO TIMING CHART

SYSTEM SWITCH MODE

SEMICONDUCTOR BASE CONNECTIONS

BLOCK DIAGRAMS

TV BLOCK DIAGRAM

Overview of the TV section's signal path and component interactions.

Y/C/AUDIO/HEAD AMP/IN/OUT BLOCK DIAGRAM

Block diagram for the video and audio signal processing paths.

MICON/POWER/OPERATION BLOCK DIAGRAM

Block diagram of the control system, power management, and user interface.

HIFI BLOCK DIAGRAM

Functional block diagram for the Hi-Fi audio system.

PRINTED CIRCUIT BOARDS

OPERATION PCB LAYOUT

Top-down view of component placement on the Operation PCB.

LED PCB LAYOUT

Top-down view of component placement on the LED PCB.

AV PCB LAYOUT

Top-down view of component placement on the AV PCB.

DECK PCB LAYOUT

Top-down view of component placement on the Deck PCB.

SYSCON PCB LAYOUT

MAIN/CRT PCB LAYOUT

DEFLECTION SCHEMATIC DIAGRAM

TV POWER SCHEMATIC DIAGRAM

CRT SCHEMATIC DIAGRAM

INTERCONNECTION DIAGRAM

WAVEFORMS

MECHANICAL EXPLODED VIEW

CHASSIS EXPLODED VIEW (TOP VIEW)

Exploded view showing the arrangement of parts within the chassis from the top.

CHASSIS EXPLODED VIEW (BOTTOM VIEW)

Exploded view showing the arrangement of parts within the chassis from the bottom.

MECHANICAL REPLACEMENT PARTS LIST

ACCESSORY REPLACEMENT PARTS LIST

List of replacement parts for unit accessories.

CHASSIS REPLACEMENT PARTS LIST

ELECTRICAL REPLACEMENT PARTS LIST

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