SD-PX15H (serv.man20) - Sharp Audio Service Manual (repair manual). Page 9

SD-PX15H

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Audio

SD-PX15H

Service Manual

SD-PX15H

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Adjustment VRA101, VRA102, VRA201, VRA202, VRA301 and
VRA302 so that the DC voltage between speaker terminals (SO603) +
and - is set to 0 

± 5 mV at AC 230 V.

NOTE: Remove the front cabinet of the set to adjust these voltages.

Since this DVD/CD system incorporates the following automatic adjust-
ment functions, readjustment is not needed when replacing the pickup.

Therefore, different PWBs and pickups can be combined freely.

Each time a disc is changed, these adjustments are preformed auto-
matically. Therefore, playback of each disc can be preformed under
optimum conditions.

While holding down both the POWER button and the EJECT button of
the main unit from the power-off state, press the FUNCTION button to
enter the Test Menu Mode.

Turn on the power to set the FL display to the stand-by mode.

• In the test mode, the model name and ROM version appear on the

FL display.

Model name (upper 5 x 7 dots): “PX*_

”

(* appears as “s” when input AUDITION is low and “a” when high,
both in lower case.)

The destination symbol appears in   according to the AREA termi-
nal.

Version (lower 5 x 7 dots): “Ver.****” (**** is the version number.)

(The numeric keypad on the remote control allows you to enter
each test mode directly for saving time.)

• While the version is displayed, press the SKIP and the UP/DOWN

buttons (including the buttons of the remote control) to display the
menu.

Press the SKIP button to select the TEST Mode and then press the
PLAY button to enter the mode.

The SKIP UP/DOWN buttons display menu No. 1 - No. 5.

* In each TEST Mode, the followings are displayed:

Upper 5 x 7 dot section: TEST_

Lower 5 x 7 dot section: Letters for each TEST Mode which are
shown in "Display" of the above table

1. When the POWER button is pressed in a test mode. “COMPLETE”

appears on the lower area of 5 x 7 dots for 1 second. Start reset
(clear the RAM).

2. In each TEST Mode, cancel the TEST Mode by power failure detec-

tion and execute shutdown. (To reset when recovering from power
failure next time, write improper data on the data for RAM check.)

• ID command for initialization is sent to the DVD unit and EEPROM

in the unit is initialized.

When entering the Shipping TEST Mode:

1. Indicators “TEST” (upper 5 x 7 dots) and “INITIAL” (lower 5 x 7

dots) flash on the FL display.

2. DVD+B is set to on and communication with the DVD unit starts.

3. The DVD unit requests a model ID. The model ID is sent in the

same way as when the power is turned on, but with the following
flag set.

b7 of Byte No. 2 and Sub Command 1: Reset Bit = “1”

Electronic

Voltage

SO603

AC 230 V

Set

Output :

Speaker Terminal

+

-

VR : 0
Input : AUX

VRA301

L-CH OUTPUT

OFFSET

ADJUSTMENT

VRA302

R-CH OUTPUT

OFFSET

ADJUSTMENT

VRA101

L-CH OUTPUT

OFFSET

ADJUSTMENT

VRA102

R-CH OUTPUT

OFFSET

ADJUSTMENT

VRA201

L-CH OUTPUT

OFFSET

ADJUSTMENT

VRA202

R-CH OUTPUT

OFFSET

ADJUSTMENT

1

SHIPPING 
TEST

“1” key on the 
numeric keypad

INITIAL

For production

2

KEY TEST

“2” key on the 
numeric keypad

KEY

For production

3

AMP TEST

“3” key on the 
numeric keypad

AMP

For production

4

TUNER 
TEST

“4” key on the 
numeric keypad

TUNER

For production

6

DVD TEST

“6” key on the 
numeric keypad

DVD