JVC 330 Service Manual page 139

Chapter 4—Maintenance
Figure 4-13 System Controller Board SRAM Chips Location.
3. The four (4) socket batteries are located in the chip inserts beneath the
SRAM chips, U25, U26, U64, and U65 (refer to Figure 4-6 for location).
Remove the four (4) SRAM chips and batteries from the SCB (note the
position of pin 1 by the key in the chip-pin 1 is at the upper left looking
down at the chip with the cutout key at the top).
4. Carefully separate the socket batteries from the socket extensions (see
Figure 4-14). DO NOT remove the SRAM chip from the extension.
5. Reinsert the SRAM chip and extension into the new socket batteries.
Figure 4-14 SRAM Chip, Extension and Battery Side View
6. Carefully reinsert the socket batteries and SRAM chips back into the SCB.
7. Reinstall the SCB.
4-26
CAUTION!
a metal surface! The positive and negative terminals of the
battery will short out and destroy the battery!
Never place the socket battery on
Model 330. 340SC, 370SC Service Manual