Teac MT-20D-IO Maintenance Manual page 85

(31) TP4 (frequency control) PCBA Interface Control
Test point for measuring the frequency control signal within the read
data separator.
TP4 is used to adjust the VFO operating point.
TP4 -
-----------
----- ---- 2.5 V
Fig. 353 Example of waveform at TP4
(32) TP5 (read data pulse R) PCBA Interface Control
Test point for measuring the read data pulse R signal.
TP5 is used to check the operation of the write/read system.
J4-17
RD
signal
~
TP5
J4-17
RD
signal
.-J
TP5
t
t
560 ns (Write operation)
440 ns (Read operation)
(a) "90 ips"
llions
.
,
(b) "30
ips"
Fig. 354 Example of waveform at TP5
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