Sony D-NE830, Service Manual

Page: 10 / 44

10
D-NE730/NE730LS/NE830/NE830LS
SECTION 4
TEST MODE
1. How to Enter the Test Mode
Caution: If any key other than the VOL + key is pressed after the
AC adaptor (3V) is connected, the machine cannot enter
the Test mode.
1. Confirm that battery is not installed in the product.
2. Confirm that the HOLD
. switch is set to the OFF position
of the product.
3. Connect a remote control to the product.
4. Connect the AC adapter (3 V) to the product.
5. While keeping pressing the VOL + key of the product, operate
the HOLD
. switch of the product in the order as shown
below.
HOLD
.
switch ON
→
OFF
→
ON
→
OFF in this order.
The machine cannot enter the test mode when the HOLD
.
switch is in the ON state.
2. Display on the Remote Control
The dot matrix display of the remote control indicates the following
data in the Test mode.
1
Microprocessor OEM code number.
The numeric data only of the OEM code number that is updated
whenever it is changed.
Example: “201” is displayed for OEM824 (mass production)
2
Checksum value of the fixed data
Checksum value of the fixed data such as destination information,
default value of VOLUME/LANGUAGE, offset, default value table,
bug patch.
3
Checksum value of the non-fixed data
Checksum value of the non-fixed data such as menu setup value,
AUTO RANKING/RANKING SHUFFLE playback.
1 Microprocessor OEM code number
2 Fixed value (checksum value)
3 Non-fixed value (checksum value)
8888888
1 2 3
3. Power Supply Voltage Check
Verify that the supplied voltages at the respective check points satisfy
the specifications.
The measurement modes of TP304 can be switched by the Test mode.
Key of the OPR lamp Measurement
machine illuminating color modes
u Red Normal
>
Green Power Save Mode 2
.
Red + Green LINE OUT
IC851
TP621(AVDVCO)
TP422(VCC1)
TP304(VREGO)
TP423(VG)
TP415(VCC3)
TP409(VCC2)
MAIN BOARD (SIDE B)
TEST POINT Spec Mode
TP422 (VCC1) 1.25
±
0.1V —
TP409 (VCC2) 2.1
±
0.1V —
TP415 (VCC3) 2.7
±
0.1V —
TP621 (AVDVCO) 2.1
±
0.05V —
TP423 (VG) 5.5
±
0.15V —
1.72V to 2.00V Normal
TP304 (VREGO) 1.8
±
0.1V Power Save Mode 2
2.82V to 3.21V LINE OUT
Ver. 1.1
[TP304 Output Voltage Switching Method]
1. Enter the Test mode.
2. TP304 voltage measurement modes can be switched by
pressing the u or > or . key of the machine as
shown below.
3. The measurement modes can be identified by viewing the
illuminating color of the OPR lamp of the machine.