ICD-B500 - Sony Audio Service Manual (repair manual). Page 6

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6
ICD-B500
SECTION 3
TEST MODE
1. Outline of the TEST MODE
The TEST MODE is designed to help verify the set when servicing
it.
The TEST MODE is only menu driven to select modes for servicing.
2. Entering and Canceling the TEST MODE
With the power on, turn on the [HOLD] switch while pressing the
 
x STOP
  button and the [DISPLAY/MENU] button at the same time.
3. Canceling the TEST MODE
The TEST MODE can be cancelled by turning off the power
(unplugging the dry battery).
4. Menu Key Designation
The menu has the five modes described below. The following keys
are assigned on the initial screen (version display).
5. Key Assignment
From within TEST MODE, the intended menu can be entered by
using the appropriate one key of the following key.
LCD Test (All On
yAll Off)
DISPLAY/MENU
LCD Test (All Off)
Bx PLAY/STOP (ENTER)
BEEP Test (1.3 kHz)
ERASE
HQ-DSP LOOP
zX REC/PAUSE
SP-DSP LOOP
– .
LP-DSP LOOP
>  +
REST MENU Test
DIVIDE
Initial Display from each mode
x STOP
5-1. Initial Display in TEST MODE
LCD indications (destination information, memory capacity, CPU
FW information and MIC sens) when TEST MODE is entered:
5-2. LCD Test
To enter the LCD Test, press the [DISPLAY/MENU] button. The LCD
Test has two modes: All On and All Off First all the indicators are
on. All the indicators are off when the button is pressed again.
Press the  
x STOP
  button to return to the initial display (destination
information, memory capacity, CPU FW information and MIC sens).
5-3. BEEP Test
To enter the BEEP Test, press the [ERASE] button.
Press the  
x STOP
  button to return to the initial screen (memory and
CPU version).
5-4. DSP LOOP
The DSP LOOP modes can be entered selectively by pressing the
appropriate one of the following three keys.
Within the LOOP test menu, “LOOP” is displayed. The sensitivity
character H or L is displayed depending on the position into which
the [HOLD] switch is placed.
The sensitivity H is displayed when [HOLD] switch is in the ON
position. The sensitivity L is displayed when [HOLD] switch is in
the OFF position.
To change the DSP LOOP test mode, press the  
x STOP
  button, then
select the  
zX REC/PAUSE
  button,  
 .
  button, or  
+
  button.
In a DSP Test mode, to select another DSP Test mode and to select
the other sensitivity, the  
x STOP
  button also has to be pressed.
Memory capacity
(256-256 MB)
MIC sens
Destination
information
CPU FW information
ALL ON
DISPLAY/MENU
Switch between
the modes.
ALL OFF
Beep: Frequency 1.3 kHz only
zX 
REC/PAUSE
.
>
HQ
H
LP
H
SP
H
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