Teac MT-20D-IO Maintenance Manual page 91

3-7-3 Functions of straps
The PCBA drive control and PCBA interface control are provided with straps
to change over the MTU functions. or make adjustment and check.
(1) Sl (changeover of read amplifier gain) PCBA Drive Control
Strap for changing over the gain of the read amplifier.
The read amplifier is set to AGC OFF status during check and
adjustment for head alignment. This strap is used to prevent the
gain of the read amplifier from becoming excessively high in such a
case.
The gain of the read amplifier is reduced by shorting Sl. Normally.
Sl is used in open status.
(2) S2 (AGC ON/OFF) PCBA Drive Control
"D/CAS"
Strap for turning ON/OFF the AGC of the read amplifier. When S2 is
shorted. AGC is turned ON; when opened. it is turned OFF.
Normally. S2 is used in shorted status.
(3) TP7. 8. GND (parity strap) PCBA Interface Control
For the .contents, refer to Item 1-13-2 in the specifications.
"SCSI"
(4)
SO. 1.
2
(device address) PCBA Interface Control
For the contents. refer to Item 1-13-3 in the specifications.
(5)
S3 (parity strap) PCBA Interface Control
For the contents, refer to Item 1-13-2 in the specifications.
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