1-28 (No.YA337)
3.2 MEMORY IC REPLACEMENT
• This model uses the memory IC.
• This memory IC stores data for proper operation of the video and drive circuits.
• When replacing, be sure to use an IC containing this (initial value) data.
3.2.1 MEMORY IC TABLE
3.2.2 MEMORY IC REPLACEMENT PROCEDURE
1. Power off
Switch off the power and disconnect the power plug from the AC outlet.
2. Replace the memory IC
Be sure to use the memory IC written with the initial setting values.
3. Power on
Connect the power plug to the AC outlet and switch on the power.
4. Receiving channel setting
Refer to the OPERATING INSTRUCTIONS and set the receive channels (Channels Preset) as described.
5. User setting
Check the user setting items according to the given in page later. Where these do not agree, refer to the OPERATING
INSTRUCTIONS and set the items as described.
6. SERVICE MODE setting
Verify what to set in the SERVICE MODE, and set whatever is necessary (Fig.1). Refer to the SERVICE ADJUSTMENT for setting.
3.2.3 SERVICE MODE SETTING
SERVICE MODE SCREEN
Fig.1
SETTING ITEM
Simbol Number of pins Mounting PWB Main content of data
IC3753
8-pin DRIVE PWB Adjustment and setting data (GAMMA, SHADING, etc.) of
IC3701
(DRIVE CPU) are memorized.
IC7201
48-pin DIGITAL PWB Progaram(Video process) of IC6001(System CPU) is memorized.
IC7602
8-pin DIGITAL PWB Setting value of IC7601(MAIN CPU) is memorized.
ADJUSTMENT MODE SCREEN
SERVICE MENU SCREEN
SERVICE MENU
1. ADJUST
2. SELF CHECK
3. I2C STOP
S001 R DRIVE137
NTSC3 FULL STD LOW
Setting items Settings Item No.
Video system setting Adjust S001 - S009
Audio system setting Adjust T001 - T003
Main CPU system setting Fixed M001 - M224
Drive system setting Fixed F001 - F002
(NOT USED) Fixed D001
(NOT USED) Fixed Z001
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