Hitachi VM-H675LA Service Manual page 97

1.3.2 Mechanical Block Self-Diagnostic Function (B Mode)
Caution: Complete the A mode before engaging the
B mode.
(1) Setting Procedure
1) Connect (attach) a power supply (battery).
2) Press the EJECT switch to set to the eject state.
3) Press the "Hi-8 MP" switch on the trouble sensor and
the DATE button and hold them, then set the CAM/
OFF/VIDEO switch to "VIDEO" (Hold this state for a
few seconds.) [Within 3 seconds].
4) Close the cassette lid.
××,× <××.××> 200×/××/××
LOD
RSS
ESS
CFG
TAB
ME
H: 0000000002001000
0000
×××/×××
5) The procedure ends in the eject state.
Caution: Do not close the cassette lid.
(2) Results of diagnosis
Table 1-3 summarizes the results of diagnosis and the
circuits/parts deemed to be defective in the B mode.
Part Display
Loading LOD
motor
UNL
Trouble RSS
sensors
7 - 4
UNL
EJT
RST
UST
EST
REW
S30
LST
STG
FWD
MP
HEC
0123456789ABCDEF
L: 110111180100BD00
AUDD140
Table 1-3 Results of B Mode Self-Diagnosis (1/2)
Results of diagnosis
(Detect display conditions)
The loading motor is defective when running
forward.
(Does not load within 10 seconds.)
The loading motor is defective when runnig
in reverse.
(Does not unload within 10 seconds.)
The pulse from the supply reel sensor is
defective.
(There is one pulse or less withinte two
seconds.)
Supply reel disk
Fig.1-3 Hi-8 MP Switch Position
<Results of self-diagnosis>
The defective items flash.
The shaded items are the tape detection switches
and cassette holder switch which flash when they are
not pressed.
See Table 1-3 for the results of diagnosis.
Cautions:
Do not press any buttons other than those specified
during self-diagnosis; otherwise, it may cause a
malfunction.
The indications in dotted lines are not covered by the
self-diagnostic functions.
It is normal for the diagnostic procedure to end in the
eject state. Do not close the cassette lid thereafter.
[To release]
Set the CAM/OFF/VIDEO switch to "OFF".
Parts/circuits deemed to be defective
Loading motor
Rotation of drive gears in mechanical block
faulty.
IC0671
IC0901
IC0902
Power supply (5V, B+) lines.
Supply reel disk
Trouble sensor (reel sensor)
Capstan motor
IC0901
Idler plate
Cassette holder
switch
Hi-8 MP switch
Sub chassis