Test Mode; Rom Correction Writing Mode - Kenwood KCA-BT100 Service Manual

KCA-BT100
How to enter the test mode
Set the connected head unit to the test mode to enter the

test mode.

Test mode conditions
• In the test mode, telephone number and name are not nor-
mally displayed. (In order to use for the display in the test
mode)
• Key operations have to be the same as the operations in
the normal mode.
• The unit comes into conditions when the telephone is con-
nected even if it is not physically connected.
ROM correction version display and
Main µ-com (IC3) software version display
• In the name used to enter the telephone directory search
mode, ROM correction version and Main µ-com (IC3) ver-
sion are displayed.
" S x . x x
(Main µ-com)
Switch status display (DISPLAY SELECT: S2)
• Depending on the status of the switch, the level at pin 30 of
the main µ-com (IC3) varies.
When the switch (S2) is set to the side 1: Hi level
When the switch (S2) is set to the side 2 (GND side): Lo
level
Mode to make ROM correction E2PROM externally writable.
How to enter the write mode
Reset while keeping the Lo level at the write mode terminal
(pin 100 of the Main µ-com (IC3))
The write mode condition is retained while the write mode
terminal is at Lo level.
In this condition, externally write the data.
6
R x . x x "
(ROM correction)

ROM CORRECTION WRITING MODE

TEST MODE
Flash ROM check function
To check connection of the external flash ROM.
• How to enter the test mode
Set Lo level at pin 23 of the main µ-com (IC3) and then
reset it to enter the test mode.
• Operations
During operations, the Hi/Lo level at pin 31 of the main µ-
com (IC3) changes.
Output level will become constant after the completion of
operations.
Hi level: OK
Lo level: NG
Clear of the test mode
The unit returns to the initial condition by reset, ACC OFF,
POWER OFF and momentary power down.
How to check the data
q Enter the test mode. (Refer to "How to enter the test mode"
for how to enter the test mode)
w Enter the telephone directory search mode and check ROM
correction version.