DAEWOO AMI910L
Service Manual

ADJUSTMENTS

TAPE ALIGNMENT CHART Step Item Reference Value Test Tape Adjust Point Test Point Note Be sure Wow & Flutter is within 0.35% Adjust Tape Speed of end position after adjustment at tape start position Be sure High speed after normal speed adjustment FIG.

Normal 1 Tape Speed Adjustment High 2 3 Azimuth Adjustment Recording Bias Oscillator Frequency Adjustment

3,000~3,010Hz

MTT-111N

RV601

Line Out L/R Channel

FIG.1

5,820~6,180Hz Maximum Level Phase:Within90° 80 KHz±0.5

MTT-111N MTT-114N MTT-5511

-----Head Screw L601

Shorted TP601, TP602 Line Out L/R Channel CM617,GND

FIG.1 FIG.2,3,4

Adjust with frequency counter connected.

FIG.1

Adjust with Frequency Counter Connected Test Tape : MTT-111N(3kHz) MTT-5511(Blank) Set Output Level Measurement Point Forward Side Reverse Side Frequency Counter

FIG. 1 : Tape Speed & Record Bias Oscillator Frequency Adjust Circuit

FIG. 2 : Tape Azimuth Adjust Location (Record/Playback Head)

L-CH Peak

Test Tape MTT-114N (10kHz)

L-CH

Oscilloscope

within 1 dB Output Level R-CH Peak within 1 dB

Set

V

H

Screw Angle

Output Level Measurement Point Screen Pattern

L-CH Peak

R-CH Peak

Screw Angle

In Phase 45 Good

90

135

180

Wrong

FIG. 3 : Tape Azimuth Adjust Head Screw & Waveform

FIG. 4 : Tape Azimuth Adjust Circuit & Waveform

6