Download Print this page

Sanyo VCR 4500 Service Manual

Hide thumbs

Table Of Contents

Table of Contents

Specification
Features
Safety Precautions
Leakage Current Check
Table of Contents
Cabinet Disassembly
Circuit Board Disassembly
Circuit Board Locations
Removal of the Main Circuit Board
Video Circuit (VD-1)
System Control Circuit (SY-1)
Tuner Circuit (TN-2, TN-3)
Tuner and if Circuit (TN-1)
Power Supply Circuit (PW-1, PW-2)
Antenna Terminal Board (TB-1)
System Control Circuit and Terminal Board (SY-2, TB-2)
Timer Circuit (TM-1)
Circuit Adjustment
Preparations for Adjustment
Equipment
Set-Up
Specified In/Output Level and Impedance
Color Bar Signal
Adjustment Steps
Power Supply Circuit Checks
System Control Circuit Checks and Adjustments
Power Supply Voltage Check
Counter Memory Check
Tape Looseness Check
Servo Circuit Adjustments
Still-Frame Brake
Still-Frame Brake Timing
Video Circuit Adjustments
Setting before Adjustment
Pre-Amplifier Frequency Response
D.O.C. Sensitivity
3.58Mhz Oscillation Frequency
A.g.C.
Comb Filter
Video Output Level
A.C.C. Level
4.27Mhz B.P.F.
Chrominance Signal Carrier Leak
Noise Canceller
Luminance Signal Playback Level
Color Signal Recording Current
Monochrome (Luminance) Signal Recording Current
Sync Tip Carrier Frequency and FM Frequency Deviation
Special Playback Dummy V (Vertical) Sync Insert Position
Circuit Board VD-1, AD-1
Audio Circuit Adjustments
Bias Level and Oscillation Frequency Check
A.L.C. Output Check
Recording Current Level Check
Overall Frequency
Recording/Playback Output
Playback Audio Level Check
S/N Ratio Check
Timer Circuit Checks
Clock 2 Check
Reset Input (L Level) Input Check
Tuner Circuit Adjustments
Mechanism Adjustment
Jigs and Tools for Adjustment
Removal Fron Loading Mechanism Assembly
Direction of Movement of the Cassette Holder for Manual Operation
Operation of the VCR Once the Front Loading Mechanism Assembly Has Been Removed
Maintenance Timetable
Mechanism Repair and Parts Replacement
Video Head
Cleaning the Audio/Control Head and Full-Erase Head
Pinch Roller
Tape Path
Supply Reel Base
Take-Up Reel Base
Reel Base Drive Gear Assembly
Back Tension Brake Band
Audio/Control Head Assembly
FWD Sensor
REW Sensor
Capstan Motor
Loading Motor
Loading Ring
Reel Motor
Video Head Disc
Slip Roller Assembly and Belt
Adjustments
Front Loading Motor
Reel Base Height
Back Tension Lever Position
Winding Torque
Tape Path Adjustments
Back Tension Guide Vertical Position
Full-Erase Head Tape Guides
Audio/Control Head Tape Guides
Audio/Control Head
Tracking
Using Method of Mechanism Jig
Confirmation and Adjustment of the Level Difference between Video Heads a and B

Quick Links

1 Specification
2 Table of Contents
3 Set-Up
4 Slip Roller Assembly and Belt
Download this manual

Table of Contents

Sanyo VCR 4500 Service Manual

Quick Links

Related Manuals for Sanyo VCR 4500

Related Products for Sanyo VCR 4500

Table of Contents