SECTION 5
TROUBLESHOOTING
5.1 SELF-DIAGNOSIS FUNCTION
5.1.1 OUTLINE
SERVICE MENU SCREEN
This model has a "Self-diagnosis function," which checks the
operation state of the circuits and temperature inside the set, and
< SERVICE MENU >[1/2]
informs us of a failure and memorize it when a failure occurs.WHITE BALANCE BLOCK
Diagnosis is performed when the power is turned on, andDECODER BLOCKSYNC BLOCK
SIGNAL BLOCK
information input to the main microcomputer is monitored at allFORMAT BLOCK
SIZE_1 BLOCK
time. SIZE_2 BLOCK
DISPLAY BLOCK
The diagnosis is displayed on the screen and LED flashing.CPU BLOCK
2DEVICE INITIAL VALUE
Failure detection is based on input state of IC bus and various
ENTER: SELECT: EXIT:MENU
control lines connected to the main microcomputer.
Fig.1
5.1.2 ENTERING SELF-DIAGNOSIS BLOCK
< SERVICE MENU >[2/2]
(1) Enter the SERVICE MODE. (See a page for SERVICE
UPDATE CPU PROGRAM
MODE settings).DIAGNOSIS BLOCK
HOUR METER BLOCK
(2) Select DIAGNOSIS BLOCK in the SERVICE MODE.FIRM WARE VERSION
UNIT_1 BLOCK
(3) Self-diagnosis block screen is displayed.UNIT_2 BLOCK
5.1.3 ESCAPING FROM SELF-DIAGNOSIS BLOCK
ENTER: SELECT: EXIT:MENU
(1) To return to the SERVICE MODE screen, press the [MENU
/ EXIT] key.
Fig.2
5.1.4 INITIALIZATION OF ITEMS IN DIAGNOSIS
(1) Enter the SERVICE MODE. (Fig. 1)
SELF-DIAGNOSIS SCREEN
(2) Select DIAGNOSIS BLOCK in the second page (2/2). (Fig.
2)
(3) Adjustment screen for DIAGNOSIS BLOCK is displayed.< DIAGNOSIS BLOCK >
(Fig. 3)CLEAR
I2C MAIN BUS: X3
(4) Confirm that all the items are displayed as "O". I2C ROM BUS: d
I2C SLOT1 BUS: d
(5) If an error occurs in an item, "X" and the number of error I2C SLOT2 BUS: d
POWER UNIT: d
times is displayed in the item. Up to nine times of errors are FAN LOCK: d
TEMP. OVER (90h): d
counted. If errors occur more than nine times, "9" is TEMP. OVER (92h): d
displayed. Unless deleted, the number of error timesENTER: EXIT:MENU
remains memorized in a memory.
Fig.3
(6) To delete an error, select "CLEAR" and press the [ ] key.
(Fig. 4)
(7) Then, items in DIAGNOSIS is initialized, and all items are< CLEAR >
displayed as "O". (Fig. 5)
L!Are you sure ?
"YES" then key.
5.1.5 POINTS TO NOTE WHEN USING THE SELF-DIAGNOSIS "NO" then keyMENU.
FEATURE
In addition to circuit failures (abnormal operation), the following
cases may also be diagnosed as "Abnormal," and displayed and
Fig.4
counted as "X".
(1) Temporary defective transmissions across circuits due to< DIAGNOSIS BLOCK >
pulse interruptions
CLEAR
2 I2C MAIN BUS: d
(2) Misalignment in the on/off timing of power for IC bus (Vcc)
I2C ROM BUS: d
I2C SLOT1 BUS: d
when turning on/off the power.
I2C SLOT2 BUS: d
POWER UNIT: d
Diagonasis may be impeded if I2C SIGNAL BUS, and I2C ROM
FAN LOCK: d
TEMP. OVER (90h): d
BUS are displayed as "X". TEMP. OVER (92h): d
If a failure is expected to reoccur, clear (reset) the failure history
ENTER: EXIT:MENU
to make the unit record the new diagnosis results.
Fig.5
1-140 (No.YA347) |
ACEC
JVC
