ICD-P28 - Sony Audio Service Manual (repair manual). Page 3

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[Precaution when the flash memory (IC701) is replaced]
When the flash memory (IC701) is replaced, be sure to perform the
BAD BLOCK check* and writing of the model code. If they are not
completed, the unit will not operate normally.

   * BAD BLOCK check is to check the flash ROM memory

area (the BAD BLOCK area) where data cannot be
guaranteed. The resultant information of this check is stored
in the TOC-AREA so that the BAD BLOCK area should
not be used.

[BAD BLOCK Check Procedure]
1. When the power is turned on after the flash memory (IC701) is

replaced, the BAD BLOCK check starts automatically and the
 OPR  (D701) lights in orange.

2. In about 30 seconds after start of the check, the  OPR  (D701)

changes the color to green indicating that the check is
completed.

R101

R110

51

50

30

31

TP719

TP101

TP102

TP718

TP714 TP715

R717

D701

RED

(REC)

D701

OPR

GRN

(PLAY)

Q701

R716

FB103

FB102

R133

X101

C106
C105

C114
R104

C116

C111

R135

C107

R105

C101

FB101

FB104

R102

R103

R128

C112

C110

C102

C104

C125

B  E  B 

C     C 

MAIN BOARD   (SIDE B)