XAV-A1 - Sony Car Audio Service Manual (repair manual). Page 6

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There are two types of IC1 on the XA-123 board. Because IC1 has the combination with R197, the type of IC1 is confirmed by following
FLASH/MASK Type Discrimination, and R197 is replaced at the same time if necessary. (Be sure to confirm the type of new IC1, because
the supplied type cannot be specified by situations of the service parts)
Also when replacing R197, it is replaced after the type of IC1 is confirmed.

FLASH/MASK Type Discrimination
FLASH/MASK type can be discriminated by printing of IC1 on the XA-123 board.

Type

IC1

R197

FLASH

9-885-085-15  IC  

µ

PD78D0078GK-9E/7704AA

1-216-833-11  METAL CHIIP  10K  5%  1/10W

MASK

9-885-098-12  IC  

µ

PD780076GK-668-9ET-A

1-216-864-11  SHORT CHIIP  0

 When IC before replacing is FLASH type, and new IC is MASK type.

R197 is replaced with 1-216-864-11 SHORT CHIIP 0 at the same time as replacing IC1.

 When IC before replacing is MASK type, and new IC is FLASH type.

R197 is replaced with 1-216-833-11  METAL CHIIP  10K  5%  1/10W at the same time as replacing IC1.

 When IC before replacing is FLASH type, and new IC is FLASH type.

IC1 is only replaced.

 When IC before replacing is MASK type, and new IC is MASK type.

IC1 is only replaced.

About the Replacement of R197
When replacing only R197, be sure to confirm the type of IC1 by above-mentioned FLASH/MASK Type Discrimination.

 When IC1 is FLASH type.

Replace with 1-216-833-11  METAL CHIIP  10K  5%  1/10W.

 When IC1 is MASK type.

Replace with 1-216-864-11 SHORT CHIIP 0.

NEC JAPAN

FLASH Type : D78F0078GK
MASK Type  : 780076GK 

R197

IC1