Adjustment - JVC TH-D7B Service Manual

4.1 ATTENTION IN SERVICE OF DVD SECTION
(1) When pickup, Flash ROM ,DVD module board were changed, initialize EEPROM by all means.
(2) When full initialization was executed, execute learning with a DVD test disc by all means.
Test disc : VT-501, VT-502
Learning method : It is adjusted automatically by normal playback of a DVD disc.
4.2 DVD TEST MODE
4.2.1 Content of correspondence TEST MODE
(1) Version, Region, Learning status check mode
(2) NORMAL initialize, FULL initialize
(3) Device key write(CPPM, CPRM)
(4) Device key checksum indication mode
(5) Micon version indication mode
(6) FL all on mode
(7) FRONT END check mode
4.2.2 Mode transition
TEST MODE into the press [SOURC key] and [POWER key] together of main body, connect the AC power.
After into the TEST MODE, mode select by [MENU key].
SOURCE+POWER+AC
Version, Region, Learning
status indication mode
F.SKIP key 4sec
SOURCE key long press
NORMAL FULL
initialize initialize
4.2.3 Processing details
The communication of operated FL(LCD) display and DVD back end microcomputer is shown as follows.
*It is assumed to be OK to differ from the content of the specification because the number of digits is different according to the set for
the FL(LCD) display.
*It is assumed to be OK to differ from the content of the specification because it also has the relation between arrangement and pres-
ence by the set also for the key.
STEP Operation
1 AC is pulled out, and
double press [SOURCE]
and [POWER] key of the
main body
2 Keep step 1, connect AC Version, Region, Learning
SECTION 4

ADJUSTMENT

MENU key
Device key
checksum
mode
B.SKIP
Device key
write
MENU key
Movement
1 2
T
status indication mode
Power on by test mode,
version indication to FL
MENU key MENU key
Micon version
indication mode
MENU key
FL(LCD)indication
3 4 5 6 7 8 9 10 11 12 13
J C # Version indication
The display to the version code is as
follows.
0x01:JC 0x02:1U 0x03:D 0x04:E
0x05:2U 0x06:3U 0x07:UB 0x08:UT
0x09:4U 0x0a:UY 0x0b:EE 0x0c:UF
Region indication (# part)
Learning from the back end is displayed
in the 11th digit and the 12th digit
of the FL display.
Blank indication at 0xFF
Study status (11th column)
0x07: BCA CHECK OK incomplete
0x06: BCA CHECK OK incomplete
0x05: BCA CHECK OK incomplete
MENU key
FL all on FRONT END
mode check mode
Remarks
DVD learning incomplete
CD learning incomplete (indication 7)
DVD learning complete
CD learning incomplete (indication 6)
DVD learning incomplete
CD learning complete (indication 5)
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