DOWNLOAD Sony ICD-B25 Service Manual ↓ Size: 1.31 MB | Pages: 26 in PDF or view online for FREE

Model
ICD-B25
Pages
26
Size
1.31 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icd-b25.pdf
Date

Sony ICD-B25 Service Manual ▷ View online

4
ICD-B25
2-2. F-SW BOARD
Note : This set can be disassemble according to the following sequence.
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. UPPER LID SUB BLOCK ASSY
1
screw (B1.7x10)
6
upper lid sub block assy
case assy
4
claw
3
claws
5
2
screw (B1.7x7)
7
screws (B1.7x2.5)
8
speaker
1
CN703
case assy
3
F-SW board
2
Set
Upper Lid Sub Block Assy
F-SW Board
Main Board
5
ICD-B25
2-3. MAIN BOARD
3
screw (B1.7x10)
2
speaker
1
Removal the solders.
6
MAIN board
4
claw
5
claw
case assy
6
ICD-B25
3-1. IC PIN DESCRIPTION
• IC712  MB90523APFF-G-122-BND (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
RTCCE
O
Real-time clock chip enable signal output
2
BEEP
O
Beep signal output
3
XFLMRE
O
Flash memory read enable signal output
4
XFLMWE
O
Flash memory write enable signal output
5
FLMRB
I
Flash memory R/B signal input
6
DSPPWR
O
DSP power supply signal output
7
ADASYSCK
O
ADA codec system clock signal output
8
VCC
Power supply pin
9
DSPSYSCK
O
DSP system clock signal output
10
XZRST
O
Zephy reset signal output (Not used in this set.)
11
DSPACK
O
DSP I/F acknowledge signal output
12
XDIFEN
O
DSP I/F enable signal output
13
DCOMDT
O
DSP I/F command/data signal output
14
SIN1
I
DSP I/F serial data signal input
15
SOT1
O
DSP I/F serial data signal output
16
SCK1
O
DSP I/F serial clock signal output
17 to 32
SEG00 to 15
O
LCD segment signal output
33
VSS
Ground pin
34
C
C (Connect to power supply pin.)
35
SIN2
I
Zephyr/RTC I/F serial data signal input
36
SOT2
O
Zephyr/RTC I/F serial data signal output
37
SCK2
O
Zephyr/RTC I/F serial clock signal output
38
DVCC
Digital power supply pin
39
DVSS
Digital ground pin
40
ZIFACK
O
Zephyr I/F acknowledge signal output (Not used in this set.)
41
SIPCS
O
Serial parallel converter IC I/F chip enable signal output
42
AVCC
Analog power supply pin
43
AVRH
A/D reference voltage H (Connect to VCC.)
44
AVRL
A/D reference voltage L (Connect to ground.)
45
AVSS
Analog ground pin
46
BATT
I
Battery level detection A/D signal input
47
KEYIN0
I
Key A/D signal input 0
48
KEYIN1
I
Key A/D signal input 1
49
SPEED
I
Speed switch A/D signal input
50
XVORSW
I
VOR switch signal input (Low: VOR switch ON)
51
HPJACK
I
Headphone jack ON/OFF signal input (Fixed at “L” in this set.)
52
FLMSEL
I
Flash memory select A/D signal input
53
KEYPUP
O
Key pull-up signal output
54
VCC
Power supply pin
55
FLMALE
O
Flash memory address latch enable signal output (AND: OE)
56
FLMCLE
O
Flash memory command enable signal output (AND: CDE)
57
XVORIN
I
VOR signal input
58
XDSPRST
O
DSP reset signal output
59 to 62
COM0 to 3
O
LCD common signal output
63
VSS
Ground pin
64 to 72
SEG16 to 24
O
LCD segment signal output
73
SUBXTAL
O
Sub clock oscillation pin (Not used in this set.)
74
SUBCLK
I
Sub clock oscillation signal input (32.768 kHz)
SECTION 3
DIAGRAMS
ICD-B25
7
7
Pin No.
Pin Name
I/O
Pin Description
75 to 81
SEG25 to 31
O
LCD segment signal output
82 to 85
V0 to 3
LCD driver reference power supply pin
86
XHSTBY
I
Hardware standby signal input
87
MD2
I
Operation mode signal input 2
88
MD1
I
Operation mode signal input 1 (Connect to VCC.)
89
MD0
I
Operation mode signal input 0
90
XRESET
I
Reset signal input
91
VSS
Ground pin
92
XTALIN
I
Main oscillation signal input (4.096 MHz)
93
XTAL
O
Main oscillation signal output (4.096 MHz)
94
VCC
Power supply pin
95
WAKEUP
I
Wake up signal input
96
DSPIFREQ
I
DSP voice I/F request signal input
97
ZIFREQ
I
USB microcomputer (zephyr) I/F request signal input
98
RTCINTR
I
Real-time clock interruption request signal input
99
VBUSOFF
I
USB Vbus ON/OFF detection signal input (H=OFF)
100
HOLDSW
I
Hold switch signal input (High: HOLD)
101
XFLMCEO
O
Flash memory chip enable 0 signal output
102
XFLMRST/CE1
O
Flash memory reset signal/chip enable 1 signal output (Not used in this set.)
103 to 110
FLMIO00 to 07
I/O
Flash memory data bus
111 to 118
FLMIO08 to 15
I/O
Flash memory data bus (Not used in this set.)
119
VSS
Ground pin
120
XFLMWP
O
Flash memory write protect signal output
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Sony ICD-B25 Service Manual ▷ Download

  • DOWNLOAD Sony ICD-B25 Service Manual ↓ Size: 1.31 MB | Pages: 26 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony ICD-B25 in PDF for free, which will help you to disassemble, recover, fix and repair Sony ICD-B25 Audio. Information contained in Sony ICD-B25 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.