Section 4 Adjustment; Operation - JVC KD-R491 Schematic Diagrams

4.1 Outline
4.1.1 Panel
EJECT
DISP / MENU
A symbol "" in the key column indicates that the key should be pressed and held for 1 second or longer.
4.1.2 Test Modes
These test modes are available in normal production ROM.
Transition to Test Mode shall be available during DC Error detection.
Test Mode
Production Test Mode
Service Test Mode
Service Information Clear Mode
DC Error Information Mode
DOP Setup Mode
HC Mecha Running Mode
Tunisia Area /
Tuner Span Change Mode
4.1.3 Release from Test Mode
These actions will release the Test Mode and transit back to Normal Mode
Method
Reset
Momentarily voltage drop
ACC OFF
POWER OFF
Panel Detach
SECTION 4
ADJUSTMENT
ACCENT
SEARCH / RETURN
Mode Source
-
Normal Mode /
Production Mode
-
-
Normal Mode
-
Normal Mode
Remarks
All Modes
All Modes
All Modes
All Modes
All Modes
(No.MA665<Rev.001>)16/33
All In during power off, pressing and holding [1] key and [3] key, then
power on the +B power supply.
All Pressing and holding [DISP] key, then press [] key for 7 seconds.
(Starting to press [DISP] key and [] key at the same time can not
be entered into the mode)
All In during power off, pressing and holding [RETURN] key and
[ SRC] key, then power on the +B power supply.
All In during power off, pressing and holding [DISP] key and [] key,
then power on the +B power supply.
All Pressing and holding [VOLUME] key, then press [DISP] key for 7
seconds.
(Starting to press [VOLUME] key and [DISP] key at the same time
can not be entered into the mode)
All In during power off, pressing and holding [
key, then power on the +B power supply.
All Pressing and holding [VOLUME] key, then press [RETURN] key for
3 seconds.

Operation

SRC] key and [EJECT]