JVC AV-27D201 Service Manual page 10

AV-27D201
AV-32D201
MEMORY IC REPLACEMENT
1. Memory IC
This model uses a memory IC.
This memory IC stores data for proper operation of the video and deflection circuits.
When replacing, be sure to use an IC written with the initial values of data.
2. Memory IC replacement procedure
(1) Power off
Switch off the power and disconnect the power plug from the wall outlet.
(2) Replace the memory IC
Be sure to use memory ICs written with the initial data values.
(3) Power on
Connect the power plug into the wall outlet and switch on the power.
(4) System constant check and setting
  It must not adjust without signal.
 
1) Press the SLEEP TIMER key and set SLEEP TIMER for 0 min .
2) Before disappear the display of SLEEP TIMER settings, simultaneously
press the DISPLAY key and VIDEO STATUS key of the remote control
unit.
3) The SERVICE MENU screen of Fig.1 will be displayed.
4) While the SERVICE MENU is displayed, again simultaneously press
the DISPLAY and VIDEO STATUS keys to display the SYSTEM
CONSTANT screen in Fig.2.
5) Refer to the SYSTEM CONSTANT table and check the setting items. If
the value is different, select the setting item with the MENU UP/DOWN
key and adjust the setting with the MENU LEFT/RIGHT keys. (The
letters of the selected item are displayed in yellow.)
6) After adjusting, release the MENU LEFT/RIGHT key to store the setting
value.
7) Press the EXIT key twice to return the normal screen.
(5) Receive channel setting
Refer to the OPERATING INSTRUCTIONS (USER'S GUIDE) and set
the receive channels (Channels Preset) as described.
(6) User settings
Check the user setting items according to Table 2.
Where these do not agree, refer to the OPERATING INSTRUCTIONS
(USER'S GUIDE) and set the items as described.
(7) SERVICE MENU setting
Verify what to set in the SERVICE MENU, and set whatever is necessary
(Fig.1).For setting, refer to the SERVICE ADJUSTMENT.
10
Procedure
SERVICE MENU (MAIN MENU)
SERVICE MENU
PICTURE
THEATER
LOW LIGHT
RF AFC
VCO(CW)
SELECT BY
OPERATE BY
SYSTEM CONSTANT
MODEL
CCD
V-CHIP
CAN V-CHIP
MN







SELECT BY
OPERATE BY
No. 51686
Screen display
SOUND
OTHERS
HIGH LIGHT
I2C BUS CTRL
EX
EXIT BY
IT
Fig.1
:





























:YES
:YES
:NO






















EX
EXIT BY
IT
Fig.2