Read Sony ICD-47 Service Manual online
6
ICD-47
SECTION 4
TEST MODE
[Setting Method of Test mode]
Short TP701 (TEST) on the MAIN board with a solder bridge (con-
nect pin yf of IC701 to the ground). Then, turn on the power.
nect pin yf of IC701 to the ground). Then, turn on the power.
– MAIN BOARD (Side A) –
TP701
Short
: Test mode
Open
: Normal mode
)
(
[Releasing Method of Test Mode]
Turn off the power. Then, open the solder bridge on TP701 (TEST)
on the MAIN board.
on the MAIN board.
[Operation of Setting on Test Mode]
When the test mode is set, the LCD displays “TEST” and
[OPR]
LED lights in green.
Note:
The
[OPR]
LED turn off, if a key operated.
1. Audio test
• A howling occurs with “5P DSP LOOP” displayed on the LCD,
• A howling occurs with “5P DSP LOOP” displayed on the LCD,
if the
[REC START/STOP]
key is pressed.
• The mute turns on, if
[ +]
key is pressed.
• The mute turns off, if
[-- ]
key is pressed.
• The microphone sensitivity becomes high, if the
[HOLD]
switch
turned off.
• The microphone sensitivity becomes low, if the
[HOLD]
switch
turned on.
2. Sleep/Wake up test
• Pressing the
• Pressing the
[ ]
key causes the set to enter sleep state.
• Pressing another key causes the set to release sleep state.
3. LCD check
• LCD light up all, if the
• LCD light up all, if the
[STOP]
key is pressed.
• Even segment of LCD light up as shown below, if the
[FILE]
key is pressed.
LCD display
• Odd segment of LCD light up as shown below, if the
[ERASE]
key is pressed.
LCD display
4. Beep sound check
• A beep (2.4 kHz) is kept sounding, if the
• A beep (2.4 kHz) is kept sounding, if the
[MENU]
key is pressed.
• A beep stop sounding, if another key is pressed.
5. Power supply check
• The battery is on the O.K. level when the
• The battery is on the O.K. level when the
[OPR]
LED lights in
green only, or it is off.
• The battery is on the mark lighting level when the
[OPR]
LED
lights in green and blinks in red repeatedly.
• The battery is on the inactive level when the
[OPR]
LED blinks
in red only.
>
.
Nx
D
Y
S
D
M
M
M
REC DATE
SP
LP
REMAIN
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