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Model
ICD-B200RS
Pages
24
Size
1.01 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icd-b200rs.pdf
Date

Sony ICD-B200RS Service Manual ▷ View online

7
ICD-B200RS
3-3-4. LCD test
The initial screen for LCD test displays the blinking characters
“LCD”. The LCD test mode includes seven different LCD tests.
The LCD test mode is executed by pressing the  Bx  key while the
“LCD”characters are blinking.
Pressing of the  x STOP  key during any LCD test (display) will
return to this initial screen for LCD test. The LCD tests present the
following displays:
1. All LCD segments on
2. All LCD segments off
3. All LCD segments blinking
4. Even segments displayed
5. Odd segments displayed
6. LCD1 segments displayed
7. LCD set characters displayed
1) Segment test
The segment test is intended to check whether Com-Seg Map is
correct or not. When this test mode is selected, the initial screen
displays the blinking characters “SEG”.
The number of segments are 120. The segment test is executed by
pressing the  Bx  key while the “LCD” characters are blinking.
Pressing of the  x STOP  key during any display of the segment
test will return to the initial screen for LCD test. The segment test
includes the following displays:
Initial screen for LCD TEST
All ON
STOP
Character display
Segment
ODD
EVEN
All OFF
All blinking
STOP
This cycle is repeated until 
the 
   
 key is pressed (toggle).
Segment
Initial screen 
for LCD TEST
8
ICD-B200RS
2) MOJI test
The MOJI test is intended to show the character display (characters/
digits). When this test mode is selected, the initial screen displays
the blinking characters “MOJI”. The MOJI test is executed by
pressing the  Bx  key while the “MOJI”characters are blinking.
Pressing of the  x STOP  key during any display of the MOJI test
will return to the initial screen for LCD test. The MOJI test includes
the following displays:
3-3-5. BEEP test
The beep test is intended to sound 2.4 kHz beeps. When this test
mode is selected, the initial screen displays the blinking characters
“BEEP”. The beep test is executed by pressing the  Bx  key while
the “BEEP” characters are blinking. By pressing the  x STOP  key,
the beep sound will stop returning you to the initial screen for beep
test. The beep test includes the following displays:
Initial screen 
for LCD TEST
STOP
This cycle is repeated until 
the 
   
 key is pressed (toggle).
Character display
3-3-6. Battery value
The voltage value of the battery inserted into the set is displayed in
hexadecimal format. The value is invalid when the adapter is inserted.
STOP
Initial screen 
for BEEP TEST
beep 
3-3-7. DSP LOOP test
The DSP loop test has the following flow:
DSP
MIC
MIC AMP
POWER
 AMP
SPEAKER
Note : Incoming voice data from the MIC is outputted to the 
          speaker as it is.
Voice
Voice
VOICE
Voice
Voice
Battery voltage value 
(HEX value)
BATTERY display screen
The initial screen for DSP loop test displays the blinking characters
“DSP”. The DSP loop test is executed by pressing the  Bx  key
while the “DSP” characters are blinking. Pressing of the  x STOP
key during any display of DSP loop test will return you to the initial
screen for DSP loop test.
The volume can be changed by using the VOLUME+  or  VOLUME–
key. The volume value can be set to 0 to 30 levels, but is not displayed
on the screen when changed. The DSP loop test includes the
following displays:
STOP
STOP
STOP
SP MODE
LP MODE
HQ MODE
Initial screen for 
DSP LOOP TEST
Note: The volume value can be set to 0 to 30 levels, 
               but is not displayed on the screen when changed.
9
ICD-B200RS
3-3-8. Reset menu
The reset menu is used to initialize menu contents. When this mode
is selected, the initial screen for reset menu displays the characters
“RST MENU”. Pressing of  Bx    key during “RST MENU”
character display will cause the menu information to be initialized.
The reset menu includes the following items:
Initialization 
of MENU contents 
Initial screen 
for RESET MENU
Note: The display remains unchanged 
         when the MENU is being reset.
3-3-9. KEY test
The key test is intended to check whether any key pressed is
recognized or not (AD misdetection check). When this test mode is
selected, the initial screen for key test displays the blinking characters
“KEY TEST”. By pressing the  Bx  key while the “KEY TEST”
characters are blinking, the characters “PLAY” will be displayed
entering the key test screen.
Once the key test is started, the test will not be completed until all
of keys are pressed. To exit from the key test mode, turn the power
off (remove the power cord). The key test includes the following
key tests:
DIVIDE
FOLDER
ERASE
All of keys or switches completed 
to be pressed.
FlashMemory being accessed
(Initialization of MENU information)
Completed
KEY TEST screen
Initial screen for KEY TEST
STOP
DISPLAY
VOLUME–
VOLUME+
MENU
MENU item
REC MODE
VOR
CONTINUE
ALARM
BEEP
SET DATE
Initial setting
SP
OFF
OFF
OFF
ON
No setting
KEY name
x
STOP
Bx
>
+
.
zX
MENU
DISPLAY
VOLUME–
VOLUME+
FOLDER
ERASE
DIVIDE
LCD display
STOP
PLAY
FF
REW
REC
MENU
DISP
VOL M
VOL P
FOL
ERASE
DIVIDE
10
ICD-B200RS
SECTION 4
DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
Common Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
f
: internal component.
C
: panel designation.
A
: B+ Line.
• Power voltage is dc 3V and fed with regulated dc power
supply from battery terminal.
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : REC
(
) : PB
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E
: PB
a
: REC
Common Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
f
: internal component.
: Pattern from the side which enables seeing.
Caution:
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.
• Waverforms
– AUDIO board –
0.8 Vp-p
4.096 MHz
1
  IC101 
ta
 (XOUT)
0.5 V/DIV, 0.1 
µ
sec/DIV
– MAIN board –
1
  IC704 
1
 (32KOUT)
2.2 Vp-p
1.2 Vp-p
3.2 Vp-p
5 MHz
32.768 kHz
32.768 kHz
2
  IC704 
8
 (OSCOUT)
1.0 V/DIV, 10 
µ
sec/DIV
3
  IC703 
ul
 (X2)
0.5 V/DIV, 10 
µ
sec/DIV
1.0 V/DIV, 0.2 
µ
sec/DIV
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