uher VARIOCORD 263 Stereo Service Manual

Schutzgebühr DM 5.-

uher VARIOCORD 263 Stereo Specifications

General

Signal-to-Noise Ratio	50dB
Inputs	Microphone, Line
Outputs	Line, Headphones
Weight	12 kg
Model	VARIOCORD 263 Stereo
Category	Recording Equipment
Type	Reel-to-Reel
Track System	4-track stereo
Frequency Response	30Hz to 18kHz
Wow and Flutter	0.15%
Power Supply	220V

Summary

1.0 Hinging the Recorder Out Of Its Case

1.1 Transport Mechanism

Details on the tape transport system, including speed selection and clutch operation.

1.3 Checking and Adjusting the Sensing Levers

1.4 Checking and Adjusting the Tape Tension Comparator

1.41 Checking

Measurement procedures for unwinding and winding tape tension.

1.42 Adjusting

Method for adjusting tape tension comparator springs for correct values.

1.5 Checking and Adjusting the Fast Forward and Rewind Functions

1.51 Checking the Fast Forward and Rewind Functions

Procedure to verify correct operation of fast forward and rewind.

1.52 Adjusting the Fast Forward/Rewind Control Lever

Adjusting the control lever for proper rest position.

1.6 Checking and Adiusting the Wind-On Clutch

1.61 Checking

Procedure to check the wind-on clutch's torque during operation.

1.62 Adjusting the Actuating Lug On the Actuating Lever

Adjusting the actuating lug on the lever for proper function.

1.7 Checking and Adjusting the Brakes

1.71 Checking

Verifying brake operation in different playback modes.

1.72 Adjusting

Adjusting the brakes for correct lifting distance.

1.9 Checking and Adjusting the Tape Speed Selector

1.91 Checking

1.92 Adjusting

2.1 Checking and Adjusting the Pressure Between the Pressure Roller and the Capstan

2.11 Checking

2.12 Adjusting

2.2 Checking and Adjusting the Pause Control

2.21 Checking

2.22 Adjusting

2.3 Checking and Adiusting the Tape Guides

2.31 Checking

2.32 Adjusting

2.5 Checking and Adiusting the Contact Spring Assemblies and Switches

2.7 Checking the Automatic Recording Level Control A 501

2.8 Checking the Automatic Recording level control A 502

2.9 Regulator Adjustment (Variocord 23/63/63 S/63 DIA)

2.92 RF Premagnetization

Adjusting RF premagnetization for optimal frequency response.

2.93 R 54 Balancing and R 55 Closed-circuit Current of the Final Stage

Balancing amplifier stages and setting quiescent current.

3.0 Technical Data