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Alignment and Adjustments
2 Cassette Deck
2-1To Adjust Tape Speed
Notes 1) Measuring tape: i) MTT-111 (or equivalent) (Tapes recorded with 3kHz) ii) MTT-5512 (or equivalent) iii) MTT-112B (or equivalent) 2) Connect the cassette deck to the frequency counter as in figure 1-5.
Cassette Deck SPK OUT output Figure 1-5 Frequency Counter
2-4 To Adjust PlayBack Level/REC
Notes 1) Before the actual adjustment, clean the play/recording head. 2) Measuring tape : i) MTT-114N(or equivalent 10kHz AZIMUTH control) ii) MTT-5512 3) The cassette deck is connections as shown in figure 1-7. Remark
Step
Item
Pre-Setup Condition OUT (connected to the frequency counter)
Pre-Setup 1) Deck 1:MTT-111 2) Press PLAY SW button 3) Deck 2:Same as above
To Adjust
Standard
1. Adjust Deck 1 Play Level
Step Item Pre-Setup Condition SPK OUT (VTVM is connected to the scope) Pre-Setup After putting MTT114N into Deck 1 - Press FWD PLAY button. AZIMUTH To Adjust - Turn the control screw to as shown in Figure 1-6. Standard Remark
1
NOR SPEED Control
Turn CSVR1 toleft and right (MAIN PCB)
3KHz±30Hz
±1% range
1
Max output and same phase (both channels)
After adjustment secure it with REGION LOCK.
2-2. Adjust REC Bias Voltage
Step Item REC Bias Voltage Pre-Setup Condition Connect to DCW3 as in Fig.1-8 and read the VTVM. Pre-Setup Input MTT-5512 into Deck2,then press REC button. 1 AZIMUTH To Adjust Turn DL4 to the right and left. Standard Remark MAIN PCB
2. Adjust Deck 2 Play Level/REC BIAS
Step Item Pre-Setup Condition SPK OUT (VTVM is connected to the scope) Pre-Setup After putting MTT114N into Deck 2 1)Press FWD PLAY button. To Adjust - Turn the control screw to as shown in Figure 1-6. Standard Remark
1
105KHz±0.5KHz
Max output and same phase (both channels)
After adjustment secure it with REGION LOCK.
2-3. Adjust L,R UNBALANCE
Step Item L,R UNBALANCE Pre-Setup Condition Connect to DCW3 as in Fig.1-8 and read the VTVM.
Pre-Setup Input MTT-112B into Deck2,then press PLAY button.
To Adjust Turn DSVR3 to the right and left.
Standard
Remark MAIN PCB 2 Recording Bias Voltage Fig 1-8
After putting MTT5512 into Deck 2 1)Press REC PLAY button. 2)MAIN PCB DCW3, connectted to VTVM SET (MAIN PCB) Audio OSC.
LINE OUT IN TP DCW3
Turn DSVR1,DSVR2 to the right and left
6V(±0.5V)
1
±0.5dB
Recording /Play head Cassette Deck
SPK OUT
VTVM
Oscilloscope
VTVM
Oscilloscope
(GND)
In Out Figure 1-7
AUX IN
AZIMUTH control screw Figure 1-6
IN OUT
Figure 1-8 Samsung Electronics
2
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