Adjustment - JVC TH-C90A 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 excuted, excute 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 TEST MODE
4.2.1 OUTLINE
To the set which is using the DVD module, in order to perform common correspondence in production, TEST mode is prepared.
Table 1 is corresponded in TEST mode.
MODE
The destination, a region, study
state check mode
NORMAL initialize, FULL initialize
Device key write (CPPM, CPRM)
Device key check sum indication
mode
Micon version indication mode
FL all on mode
FRONT END check mode
Table 1. Contents corresponding to TEST mode.
4.2.2 SET OPERATE
TEST mode performs correspondence by operation specially so that a user cannot enter.
* TEST MODE start should be press PLAY key & POWER key of main unit together and keep condition, connect AC.
* After set up TEST MODE, mode select by MENU key.
The changes to the key in TEST mode are shown in Fig. 1.
PLAY+POWER+AC
The destination, a region,
study state indication mode
STOP key
key 4sec. press
NORMAL FULL
initialize initialize
MENU key
(*1) : Shift from destination, region and study state indication mode to NORMAL initialize, FULL initialize and device
writing mode should only can main unit key.
SECTION 4

ADJUSTMENT

CONTENTS
Indication the distination code, region number and study state fo DVD micon.
Mode of DVD micon initialize. Initialize has NORMAL initialize and FULL initialize.
NORMAL initialize : Initialize the value of user setting item, like a indication contents of
FULL initialize : Plus the contents of study which are carrying out the memory by
For device key writing mode. Device key have CPPM(DVD Audio) and CPRM(VR).
Indication the wrote device key check sum. Indication this value, it can check the device key was
wrote or not.
Indication System micon, DVD micon, other ROM version. With a set, correspondence and the
contents of correspondence shall be individual, and shall be decided.
Mode of FL (LCD) all on. With a set, correspondence and the contents of correspondence shall be
individual, and shall be decided.
Mode of relation of FRONT END.
MENU key
Device key check sum
indication mode
key
Device key
writing
SETUP OSD.
FRONT END for lead shortening are initialized for NORMAL initialize
contents.
Fig.1 Change to TEST MODE and key
MENU key MENU key
Micon version
indication mode
MENU key
MENU key
FL all on FRONT END
mode check mode
(No.MB570)1-39