Teac MT-20D-IO Maintenance Manual page 77

(15) TPi7, 18 (GND) PCBA Drive Control
These points are connected to 0
v.
(16) TP19 (output of encoder preamplifer) PCBA Drive Control
Test point for measuring the output of the encoder preamplifier.
TP19 is used to check the operation of the encoder. Since TP19 is
the test point used during manufacturing of MTU, it is not used for
maintenance usually.
(17) TP20 (servo output) PCBA Drive Control
Test point for measuring the servo output.
TP20 is used to check the operation of the servo circuit. Since TP20
is the test point used during manufacturing of MTU, it is not used
for maintenance usually.
(18) TP21 (output of solenoid drive) PCBA Drive Control
Test point for measuring the output of the solenoid drive.
TP21 is used to check the operation of the solenoid driver. Since
TP21 is the test point used during manufacturing of MTU. it is not
used for maintenance usually.
(19) TP22 (RD output) PCBA Drive Control
Test point for measuring the RD (Read Data) output.
TP22 is used to check the operation of the read circuit. Since TP22
is the test point used during manufacturing of MTU. it is not used
for maintenance usually.
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