Sony HDW-750 Maintenance Manual page 510

11-3. Contents of Menus
3 3 3 C002 : TAPE T/E SENSOR 3 3
Checks functions of the tape-top sensor, tape-end sensor and full-top
sensor.
1. Select "C002 : TAPE T/E SENSOR" and press the rotary encoder.
2. Bring a piece of metal (such as screwdriver tip) closer to the full-
top sensor. Check that status of the full-top sensor on the monitor
changes from "OFF" to "DET". Check also that status returns
from "DET" to "OFF" when a piece of metal is removed from the
sensor.
3. Insert a cassette tape and rewind it to the tape top. Check to see
that status of the top-sensor changes to "DET" at the tape top and
then returns to "OFF".
At the same time, the tape is advanced in fast-forward (or play).
Check to see that status of the end-sensor change to "DET" at the
tape end and then returns to "OFF".
m
If "DET" is not displayed at the specified position or status does
not return to "OFF", check the followings.
. Tape position detector circuit (IC304 and others/MDC-13 board
and IC1 and others/SS-92 board)
. Signal path between the respective sensors and the MDC-13
board (CN508, CN509, CN512)
. Signal path between the MDC-13 board and the SS-92 board
m
This unit monitors the following sensors.
. When a cassette tape is running in the FWD direction :
. When a cassette tape is running in the REW direction :
. When a cassette tape is not inserted :
11-8
Tape-end sensor
Tape-top sensor
Full-top sensor
SERVO CHECK MENU
C002:TAPE T/E SENSOR
FULL TOP SENSOR:OFF
TOP SENSOR:OFF
END SENSOR:OFF
HDW-750/750CE V1