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Model
ICD-P28
Pages
26
Size
1.29 MB
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PDF
Document
Service Manual
Brand
Device
Audio
File
icd-p28.pdf
Date

Sony ICD-P28 Service Manual ▷ View online

9
ICD-P28
3. Sleep test
• Pressing the  x•B  key causes the set to enter the sleep state.
• Press any keys to exit the sleep state.
4. Beep test
• Beep sound of 1.3 kHz or 2 kHz is output.
5. RTC test
• Perform the connection test of the RTC, EEPROM.
(1) RTC EEPROM test
This test checks that any data is written and read to and from
specific registers (verify check) and that data is cleared.
(2) RTC clock function test
This test checks that the time is updated at intervals of 1 second
in the micro processor by the RTC.
• It determines whether a test result is OK or NG.
If NG, it indicates that either device of RTC or EEPROM was
found to be NG.
(All OKs: RTC OK/RTC NG: RTC BAD/EEPROM NG: EEP
BAD)
6. Key entry test
• When the any key is pressed, the entry key and the A/D
converted value (hexadecimal) of the two channel keys are
displayed.
KEY IN0 is displayed on the upper side and KEY IN1 on the
lower side.
• When the  STOP  key is pressed, the A/D value of the key is
displayed while the key is depressed. When the key is released,
the screen returns to the test menu.
7. Battery remaining power test
• The detected A/D value (hexadecimal) of the battery remaining
power is displayed.
8. LED test
• LED ( OPR : orange) are all turned on.
SLEEP
SOON
• B
HOLD
SLEEP
with
off
any keys
BEEP
1.3k
(SET)
.  
/  >
• B
• B
(SELECT)
STOP
2.0k
1.3k
1.3k
2.0k
STOP
STOP
ON
ON
RTC
RTC
ON
• B
STOP
KEY
KEY,OFF
OFF
• B
STOP
BATT
BATT
AA
• B
STOP
u
LED
LED
ON
• B
STOP
10
ICD-P28
9. USB test
• When the menu starts the USB self-check, either presence or
absence of the Vbus is judged.
(Vbus is present: “VBUS: ON”, Vbus is absent: “VBUS: OFF”)
• The USB driver always works regardless of presence or absence
of the USB signal only when Vbus is available during the USB
test. At this time, turning on  HOLD  causes the set to move to
the suspend state. Turning off the Vbus causes the set to return
to the test menu.
When Vbus is supplied with the menu displayed, the key will be
inoperative. Be sure to press  x•B  key before supplying.
10. Key durability test
• Input of  x•B  key causes the counter to be “- - - - - -”, entering
the test waiting mode. Input of  x•B  key causes the counter to
be “000000”, entering the key durability test mode.
In this mode, all key inputs and ON and OFF operations of the
slide switch are counted with a count display. Turn the power
off in order to exit this mode.
11. Menu reset
• Pressing the  x•B    key causes the set to enter the menu
initialization standby state.
• Once all the keys below are input in this condition, the EEPROM
will be initialized (The settings in the menu and the user name
will be defaulted.).
At the same time, the WakeUp signal is checked, too.
• Check keys (in any order of their inputs)
FOLDER  ,  DIVIDE  ,  DISPLAY  ,  MENU  ,  MIC SENS  ,
ERASE  ,  STOP  ,  REC/STOP  ,  PAUSE  ,
PLAY/STOP (ENTER)  ,  >  ,  .  ,  HOLD  on,
HOLD  off
(All is normally ended: –ALLOK–/NG in initialization write
to EEPROM: INIT. NG)
• Turn the power off in order to exit this mode.
• B
STOP
HOLD  ON
USB
VBUS
VBUS on
Suspend mode
Cut VBUS
Cut VBUS
OFF
VBUS
ON
LINK
PC
• B
STOP
COUNT
KEY
- - - - - -  
KEY
• B
00  00  00
KEY
KEY
Key endurance
test mode
any keys or
slid switchs on/off
00  00  01
• B
STOP
PUSH
After input all keys
Case of initial setting
and reset operated
normal end.
KEY
MENU
RST
INIT (Blink)
ALL
Ok
11
ICD-P28
5-1. IC PIN DESCRIPTION
• IC702  MB91F233-148 (SYSTEM CONTROL) (MAIN BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
DSPSCK
O
Serial clock signal output to the DSP IC (IC101)
2
FLMCLE
O
Command latch enable signal output to the flash memory IC (IC701)
3 to 10
DATA0 to DATA7
I/O
Data input/output with the flash memory IC (IC701) and USB controller IC (IC8101)
11
XFLMCS0
O
Chip enable signal output to the flash memory IC (IC701)
12
DSPSYSCK
O
System clock control signal output for DSP (IC101)
13
X0A32K
I
32 kHz oscillator pin (32 kHz signal input) (IC703)
14
X1A32K
32 kHz oscillator pin
15
VCC3BCK
Power supply pin for internal logic back up
16
VSS
Ground pin
17
VCC3LGC
Internal logic power supply pin
18
BEEP
O
Beep signal output
19
XFLMWE
O
Write enable signal output to the flash memory IC (IC701)
20
XFLMRE
O
Read enable signal output to the flash memory IC (IC701)
21
FLMALE
O
Address latch enable signal output to the flash memory IC (IC701)
22
FLMRB
I
Ready/busy signal input from the flash memory IC (IC701)
23
XFLMWP
O
Write protect signal output to the flash memory IC (IC701)
24 to 30
USBADR0 to 6
O
Address signal output to the USB controller IC (IC8101)
31
XUSBCS
O
Chip select signal output to the USB controller IC (IC8101)
32
XUSBRD
O
Read strob signal output to the USB controller IC (IC8101)
33
XUSBRST
O
Reset signal output to the USB controller IC (IC8101)
34
XUSBLWR
O
Low write strob signal output to the USB controller IC (IC8101)
35
XFLMPWR
O
Power control signal output for flash memory
36
AVSS
Power supply pin for analog
37
AVREF
Reference power supply pin
38
AVSS
Ground pin for analog
39
BATT
I
Battery voltage detection signal input
40
KEYIN0
I
Key 0 A/D input
41
KEYIN1
I
Key 1 A/D input
42
XBATTEN
O
Battery detection control signal output
43 to 45
PC4 to PC6
I
Not used in this set. (Open)
46
LMUTE
O
Mute signal output
47
VSS
Ground pin
48
AVCC3IO
Power supply pin
49 to 74
SEG0 to SEG25
O
LCD segment signal output to the LCD901
75
DVCC
Power supply pin
76
DVSS
Ground pin
77 to 82
SEG26 to SEG31
O
LCD segment signal output to the LCD901
83 to 86
COM0 to COM3
O
LCD common signal output to the LCD901
87
MOD2
I
Operation mode signal input
88, 89
MOD1, MOD0
I
Operation mode signal input (Fixed at “L” in this set.)
90
XCPURST
I
CPU external reset signal input to the reset IC (IC704)
91 to 94
LCDV0 to LCDV3
LCD reference power supply input pin
95
RX
I
Input/output port (Flash write RX)
96
TX
O
Input/output port (Flash write TX)
97
PO2
O
Not used in this set. (Open)
98
RTCSIN
I
Serial data signal input from the real time clock IC (IC703)
99
RTCSOT
O
Serial data signal output to the real time clock IC (IC703)
100
RTCSCK
O
Serial clock signal output to the real time clock IC (IC703)
101
RTCCS
O
Chip select signal output to the real time clock IC (IC703)
102
XDSPRST
O
Reset signal output to the DSP IC (IC101)
103
WAKEUP
I
Wake up interruption signal input
SECTION 5
DIAGRAMS
12
ICD-P28
Pin No.
Pin Name
I/O
Pin Description
104
DSPIFACK
I
DSP I/F acknowledge signal input
105
DVCC
Power supply pin
106
DVSS
Ground pin
107
XTALIN
I
Main oscillator input pin
108
XTAL
O
Main oscillator output pin
109
XINTUSB
I
Interruption request signal input from the USB driver IC (IC8101)
110
XUSBVBUS
I
VBUS detection interruption request signal input from the USB driver IC (IC8101)
111
XRTCINTR
I
Constant cycle interruption signal input from the real time clock IC (IC703)
112
HOLDSW
I
Hold switch signal input (interruption)
113
AMPPWR
O
Power control signal output to the power amp IC (IC110)
114
XMICPWR
O
Power control signal output for microphone
115
GRNLED
O
LED drive signal output to the green LED (D701)
116
REDLED
O
LED drive signal output to the red LED (D701)
117
DSPPWR
O
Power supply circuit control signal output for DSP IC (IC101)
118
DSPIFRW
O
I/F RW signal output to the DSP IC (IC101)
119
DSPSIN
I
Serial data signal input from the DSP IC (IC101)
120
DSPSOT
O
Serial data signal output to the DSP IC (IC101)
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