SONY ICD47
Service Manual

ICD-47 SECTION 4 TEST MODE
[Setting Method of Test mode]
Short TP701 (TEST) on the MAIN board with a solder bridge (connect pin yf of IC701 to the ground). Then, turn on the power. 1. Audio test � 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 [Nx] 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 [STOP] key is pressed. � Even segment of LCD light up as shown below, if the [FILE] key is pressed. LCD display

� MAIN BOARD (Side A) �

REC DATE
M D Y M M S D

� Odd segment of LCD light up as shown below, if the [ERASE] key is pressed. LCD display

SP LP
REMAIN

4. Beep sound check � 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 [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.

(

Short Open

TP701 : Test mode : Normal mode

)

[Releasing Method of Test Mode] Turn off the power. Then, open the solder bridge on TP701 (TEST) 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.

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