Sony ICD-SX25 / ICD-SX25VTP Service Manual ▷ View online
9
ICD-SX25/SX25VTP
3. Sleep test
• Pressing the x
•B key causes the set to enter the sleep state.
• When the HOLD
. switch is ON, the LCD is turned off.
When OFF, the LCD is turned on.
• 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 function test of the RTC and EEPROM.
(1) RTC EEPROM test
(1) RTC EEPROM test
Confirmation of writing, reading (verifying) and erasing of
arbitrary data with the specified registers.
arbitrary data with the specified registers.
(2) RTC clock function test
Confirmation that RTC updates the time to the microcomputer
at one second interval.
at one second interval.
• OK, NG judgement is performed to the test result.
When NG, it is displayed which device RTC or EEPROM
becomes NG.
becomes NG.
(All OK : “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 con-
verted value (hexadecimal) of the two channel keys are dis-
played.
played.
• When the x key is pressed, the A/D value of the key is dis-
played while the key is depressed. When the key is released, the
screen returns to the test menu.
screen returns to the test menu.
7. Battery remaining power and DC IN test
• The detected A/D value (hexadecimal) of the battery remaining
power is displayed. When DC jack is inserted, the battery mark
on the LCD is turned off.
on the LCD is turned off.
any keys
any keys
(LCD OFF)
(with HOLD
.
OFF status)
x
•
B
(with HOLD
.
ON status)
x
•
B
SLEEP SOON
SLEEP IN
SLEEP
x
•
B
BEEP 2.0K
BEEP 1.3K
:
:
BEEP1.3K
on BEEP1.3K
on BEEP 2.0K
BEEP
x
x
x
.
>
(select),
(set)
x
•
B
x
•
B
RTC
RTC OK
x
bATT FF
bATT C2
x
•
B
DC jack
is inserted
DC jack
is extracted
B A T T
bATT FF
x
x
•
B
KEY oFFiFF
KEY
x
8. LED test
• LEDs (OPR: red and green) are all turned on.
9. USB test
• When the menu starts the USB self-check, either presence or
absence of the Vbus is judged.
(Vbus is present: “ON VBUS”, Vbus is absent: “OFF VBUS”)
(Vbus is present: “ON VBUS”, Vbus is absent: “OFF VBUS”)
• The USB driver always works regardless of presence or ab-
sence of the USB signal only when Vbus is available during the
USB test. At this time, turning on HOLD
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.
set to return to the test menu.
• In the menumode if the Vbus is supplied, any key will not work.
Therefore the Vbus will be supplied after surely pressing the
x
x
•B key.
10. Key durable test
• Pressing the x
•B key makes the count to “------” and sets test
standby status.
Once more pressing the x
Once more pressing the x
•B key makes the count to “000000”
and sets the key durable test.
In this mode any key input and slide switch operation are counted
and the number is displayed.
Turn off the power to exit this mode.
In this mode any key input and slide switch operation are counted
and the number is displayed.
Turn off the power to exit this mode.
11. Menu reset
• Pressing the x
•B key causes the set to enter the menu initial-
ization standby state.
• When the following keys are all entered, the EEPROM initial-
ization (returning setting in the menu and user name to default
value) and formatting process (deleting all message files in the
flash memory) are executed. At the same time, the WakeUp
signal is checked, too.
value) and formatting process (deleting all message files in the
flash memory) are executed. At the same time, the WakeUp
signal is checked, too.
Check keys: VOL– , VOL+ , A-B
, ERASE ,
DIVIDE , DPC ON , DPC OFF , . ,
x•B , > , FOLDER , MENU , x ,
z REC , HOLD
x•B , > , FOLDER , MENU , x ,
z REC , HOLD
. ON , HOLD .
OFF , DIRECTNL ON,
and DIRECTNL
OFF , VOICE UP ON,
and VOICE UP
OFF
x
•
B
LED ON
LED
x
LED ON (orange)
LED OFF
x
•
B
ON
cut Vbus
Vbus
on
cut Vbus
Suspend
mode
mode
HOLD
.
SUSPEND
VBUS ON
VBUS OFF
USB
x
x
•
B
x
•
B
any keys or slide
switches operation
KEY 000001
KEY 000000
KEY-----
KEY COUNT
x
Key durable
test
10
ICD-SX25/SX25VTP
x
•
B
In the case that
the initialization
the initialization
and reset operation
end correctly.
(0.5 sec. blinking)
All keys
are entered
ALL OK
INIT
KEY PUSH
RESET MENU
x
• If all tests end in success, “ALL OK” is displayed. If initializa-
tion in the EEPROM is NG, “INIT. NG” appears.
• Turn off the power to exit the test mode.
11
11
ICD-SX25/SX25VTP
ICD-SX25/SX25VTP
SECTION 4
DIAGRAMS
• Waveform
Note on Schematic Diagrams:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. (p: pF) 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise specified.
•
f
: internal tolerance.
•
C
: panel designation.
•
A
: B+ Line.
• Power voltage is dc 3V and fed with regulated dc power supply
from DC IN jack (J5001).
• Voltages and waveforms are dc with respect to ground under no-
signal (detuned) conditions.
no mark : PB
[ ]
no mark : PB
[ ]
: REC
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
ances.
• Circled numbers refer to waveforms.
• Signal path.
F
: PB
L
: REC
✩
Replacement of IC6001 and IC7003 used in this set requires a
special tool.
special tool.
• The voltage and waveform of CSP (chip size package) cannot be
measured, because its lead layout is different from that of conven-
tional IC.
tional IC.
Note on Printed Wiring Boards:
•
•
Y
: parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
✩
Replacement of IC6001 and IC7003 used in this set requires a
special tool.
special tool.
• Lead layouts
Lead layout of
conventional IC
CSP (chip size package)
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
surface
1
IC7003
<z/,
(XTAL)
1 V/DIV, 100 ns/DIV
2.9 Vp-p
244 ns
MEMO
12
12
ICD-SX25/SX25VTP
ICD-SX25/SX25VTP
4-1. BLOCK DIAGRAMS – MAIN SECTION-1 –
+2.5V
REG
Signal path
: REC
: PB
101
12
116
46
25
26
14
15
9
8
7
5
4
3
2
6
7
15
11
2
3
9
13
8
6
12
5
IC7001
SI/PO DRIVER
DATA
CLK
HPMUTE
STMIC
XADAPDN
DIROFF
SPAMP
10 EXTMIC
XREDLED
XDSPRST
XBATTEN
XGRLED
XBATTEN
D7001
RED(REC)
GREEN(PB)
1
4
IC6003
CLOCK GEN
IC7003 (1/3)
CPU
XCONT
FOUT
Q3003
MUTE
J3002
Q3001
IC3002
MIC AMP
(SPEAKER)
3
9
7
8
10
IC7004
REAL TIME CLOCK
CLK
DI
DO
CE
XIRQ
5
FOUT
14
XLIGHT2
IC3004
ADC, DAC, HEADPHONE AMP
AINR2
AINL2
HPR
HPL
17 MOUT
1 PDN
28
27
AINL1
AINR1
STDO
STDO
MAIN-2
BICK
LRCK
SDTI
CDTI
CCLK
CSN
18
MIN
MCLK
BCLK
LRCK
SO
XRST
MCLK
HPJACK
SPICLK
115
SPIDA
TA
45
MICJACK
DSPSYSCLK
RT
CCS
111
XR
TCINTR
98
AUSIN
13
X0A32K
99
AUSOT
100
AUSCK
102
XADACS
18
BEEP
SP3001
B
A
MIC301
IN+
REG
OUT
STBY
MIC2
MIC3
R
4
2
6
3
IC1001
MIC AMP
IN+
REG
OUT
STBY
4
2
6
3
IC2001
MIC AMP
IN+
REG
OUT
STBY
4
2
6
3
IC3003
POWER AMP
VO1
AVDD
VO2
-IN
XSHUT-
DOWN
5
8
4
1
J3001
CL3001
5
3
XT
XXT
X6001
11.2896MHz
L
STEREO
1
4
6
3
IC3005
SELECTOR
A
1
3
5
IC3001
PANEU
UNIT
MIC
PLUG IN
POWER
OPR
(DIRECTNL)
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