7 - 2
Parts to be tested
Trouble sensors
Cylinder
Capstan motor
Table 1-1 summarizes the details of display/detection of
the self-diagnostic functions and their applications.
1.2
Details of Display/Detection and Applications
Table 1-1 Details of Display/Detection of Self-Diagnostic Functions and their Applications
Occasional defect self-diagnostic
Mechanical block self-diagnostic
function (A mode)
function (B mode)
Details of display/
The system control µP memorizes and
Displays the data for the defect that has
detection
displays the defect data.
occurred when the B mode is set.
(If several defects have occurred,
only the last defect detected is memorized.)
Application
Used when the defective symptom is not
Used to detect the cause of the defect (in the
reproduced during servicing.
mechanical block or electrical circuits) and to
determine the defective position of the
mechanical block.
Detected parts
Trouble sensors
Trouble sensors
Take-up end sensor (EST)
Take-up end sensor (EST)
Supply end sensor (ESS)
Supply end sensor (ESS)
Take-up reel sensor (RST)
Take-up reel sensor (RST)
Supply reel sensor (RSS)
Supply reel sensor (RSS)
Cylinder (S30)
Cylinder (S30)
Capstan motor (CFG)
Capstan motor (CFG)
Loading motor (LOD, UNL)
Mechanism mode switch
(EJT, UST, REW, LST, FWD, HEC)
Tape detection switches, etc.
Erase prevention tab
detection switch (TAB)
ME/MP detection switch (ME)
Hi-8 MP detection switch (MP)
Cassette holder switch (STG)
Cautions
When the rewind mode is entered, the defect
Engage the B mode after completing the A
data is erased.
mode.
If the B mode is engaged first, the defect data
may be erased.
Fig. 1-2 Oeration Processes of Self-Diagnostic Functions
Defect data
<Detection/Storage>
System control µP
(Data of last defect
detected)
<Display>
EVF (LCD)/ Display
(Defective parts
flash)
Set to the A mode
[B Mode]
Set to the
B mode
Parts to be tested
Trouble sensors
Cylinder
Capstan motor
Loading motor
Mechanism mode switch
Tape detection switches, etc.
<Detection>
System
control
µP
Defect
data
<Display>
EVF(LCD)/display
(defective parts
flash)
[A Mode]
Fig. 1-2 shows the operational processes of the self-
diagnostic functions.
