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Complete manual with clear schematic diagrams and printed circuit board layouts of two variants of the headset and the transmitter an old and a new version.
Also shows how the headset and the transmitter is opened and how transmitter and receivers can be adjusted and where to measure.
I had no problems to repair the headset using this service manual.
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Excellent printing quality. A complete and very useful manual with all details.
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This is a great site. I placed my order and by the next am it was available for download. Had some problems with some missing copy on some pages. Once I brought the error to the OMC's attention, the issue was resolved. I'll come back again.
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Mi spiace per non poter scrivere in inglese... ma sono veramente soddisfatto del servizio offerto. Grazie..!!
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The quality of this manual is good. It has all schematics and setup information for both the MDS-B3 and the MDS-B4. The scan quality is quite good, all pages are readable, This service manual also contains scans of the operating instructions from the User manual.
Alignment and Adjustments
1-2 Cassette Deck
1-2-1 To Adjust Tape Speed
Notes 1) Measuring tape: i)(Tapes recorded with 3kHz) MTT-111 (or equivalent) ii) MTT-5512 (or equivalent) 2) Connect the cassette deck to the frequency counter as in figure 1-4.
SPK OUT output Figure 1-4 Cassette Deck Frequency Counter
1-2-2 To Adjust PlayBack Level
Notes 1) Before the actual adjustment, clean the play/recording head. 2) Measuring tape : i) MTT-114(or equivalent 10kHz AZIMUTH control) ii) MTT-112(or equivalent) : 3) The cassette deck is connections as shown in figure 1-6.
Recording /Play head
AZIMUTH control screw Figure 1-5
SET
SPK OUT
VTVM
Oscilloscope
Step
Item
Pre-Setup Condition OUT
Pre-Setup 1) Deck 1:MTT-111 2) Press PLAY SW button 3) Deck 2:MTT-5512
To Adjust
Standard
Remark
(GND)
! Adjust Deck 1 Play Level
Turn URV1 to left and right FRONT PCB 3KHz Step Item Pre-Setup Condition SPK OUT (VTVM is 1 AZIMUTH connected to the scope) Pre-Setup After putting MTT114 into Deck 1 1)Press PLAY button. To Adjust
Figure 1-6
In Out
1
NOR SPEED Control
(connected to the frequency counter)
Standard Max output and same phase (both channels)
Remark After adjustment secure it with REGION LOCK.
1) Turn the control screw to as shown in Figure 1-5.
Adjust REC Bias Voltage
Step Item REC Bias Voltage Pre-Setup Condition Connect to DCW2 as in Fig.1-7 and read the VTVM. Pre-Setup Input MTT-5512 into Deck2,then press REC button. To Adjust L-CH;DSR2 and R-CH;DSR1 to the right and left. Standard Remark See diagram for adjustment location
@ Adjust Deck 2 Play Level
Step 1 Item AZIMUTH Pre-Setup Condition SPK OUT (VTVM is connected to the scope) Pre-Setup After putting MTT114 into Deck 2 1)Press PLAY button. To Adjust 1) Turn the control screw to as shown in Figure 1-5. Standard Max output and same phase (both channels) Remark After adjustment secure it with REGION LOCK.
1
6V
VTVM SET
Oscilloscope
IN
UCW2
Figure 1-7 Samsung Electronics 1-3
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