6
ADJUSTMENTS
TAPE ALIGNMENT CHART
Step
Item
Reference Value Test Tape Adjust Point
Test Point
Note
FIG.
1
Tape Speed
Adjustment
Normal
3,015~3,025Hz
MTT-111N
RV601
Line Out L/R
Channel
Confirm Wow & Flut-
ter is within 0.35%
FIG.1
3,000~3,010Hz
MTT-111N
RV601
Line Out L/R
Channel
Confirm Tape Speed
of end position after
adjustment at tape
start position
FIG.1
High
5,820~6,180Hz
MTT-111N
- - - - - -
Shorted
TP601,
TP602
Confirm High speed
after normal speed
adjustment
FIG.1
2
Azimuth Adjustment
Maximum Level
Phase:Within90°
MTT-114N
Head Screw
Line Out L/R
Channel
FIG.2,3,4
3
Recording Bias Oscilla-
tor Frequency Adjust-
ment
80 KHz
±
0.5
MTT-5511
L603
TP603,GND
Adjust with frequency
counter connected.
FIG.1
FIG. 1 : Tape Speed & Record Bias Oscillator
Frequency Adjust Circuit
Test Tape : MTT-111N(3kHz)
MTT-5511(Blank)
Frequency Counter
Output Level
Measurement Point
Set
FIG. 2 : Tape Azimuth Adjust Location
(Record/Playback Head)
FIG. 3 : Tape Azimuth Adjust Head Screw & Waveform
FIG. 4 : Tape Azimuth Adjust Circuit & Waveform
Forward
Side
Reverse
Side
Adjust with Frequency
Counter Connected
L-CH
Peak
R-CH
Peak
Screw
Angle
Output Level
within
1 dB
within
1 dB
L-CH
Peak
R-CH
Peak
Screw Angle
V
H
Oscilloscope
L-CH
Output Level
Measurement Point
Set
Test Tape
MTT-114N
(10kHz)
Screen Pattern
In Phase 45 90 135 180
Good
Wrong
Summary of Contents for AMI-921DP
Page 1: ...Service Manual MINI COMPONENT SYSTEM Model DAEWOO ELECTRONICS CO LTD AMI 921DP 921DPR...
Page 8: ...7 EXPLODED VIEW AND PARTS LIST AMI 921DP 921DPR...
Page 10: ...9 WIRING DIAGRAM AMI 921DP 921DPR...
Page 11: ...10 BLOCK DIAGRAM AMI 921DP 921DPR...
Page 12: ...11 SCHEMATIC DIAGRAM 1 POWER AMP AMI 921DP 921DPR...
Page 13: ...12 SCHEMATIC DIAGRAM 2 CD AMI 921DP 921DPR...
Page 14: ...13 SCHEMATIC DIAGRAM 3 TUNER AMI 921DP 921DPR 2 Band...
Page 15: ...14 SCHEMATIC DIAGRAM AMI 921DP 921DPR FTZ 2 Band...
Page 16: ...15 SCHEMATIC DIAGRAM AMI 921DP 921DPR FTZ 3 Band...
Page 17: ...16 SCHEMATIC DIAGRAM 4 TAPE AMI 921DP 921DPR...
Page 18: ...17 SCHEMATIC DIAGRAM 5 CONTROL AMI 921DP 921DPR...
Page 19: ...18 PCB PATTERN LAYOUT AMP TUNER AMI 921DP...
Page 20: ...19 PCB PATTERN LAYOUT CD TAPE AMI 921DP 921DPR AMI 921DP 921DPR POWER AMI 921DP 921DPR...
Page 21: ...20 PCB PATTERN LAYOUT POWER CONTROL AMI 921DP 921DPR AMI 921DP 921DPR...