Test Instructions; Servicing Dvd Module And Mono Board; Reset Of Virgin Mode; Av Board - Yamaha DVD-S520 Service Manual

5. Servicing DVD module and MONO board

5.1 Reset of Virgin Mode

After the player has been powered up for test by the
dealer, it would have gone through the Virgin Mode. It is
possible to reset the settings made during that mode
before the delivery of player to the customer. This can be
done as shown in the following diagram:
DISCONNECT FROM MAINS
PRESS 2 KEYS
SIMULTANEOUSLY
<NEXT> + <OPEN/CLOSE> (ver 4.14a)
or
<PLAY> + <OPEN/CLOSE> (other version)
CONNECT TO MAINS
VIRGIN MODE IS RESET
TV SCREEN SHOWS
VIRGIN MODE MENU
Figure 32
5.2 Trade Mode
When the player is in Trade Mode, the player cannot be
controlled by means of the front key buttons, but only by
means of the remote control.
IF TRADE MODE OFF
DISCONNECT FROM MAINS
PRESS 2 KEYS
SIMULTANEOUSLY
<PREVIOUS> + <OPEN/CLOSE>
CONNECT TO MAINS
PLAYER IS IN TRADE MODE
WHEN PRESSING FRONT
KEYS, THE PLAYER
DOESN'T RESPOND
Figure 33
IF TRADE MODE ON
DISCONNECT FROM MAINS
PRESS 2 KEYS
SIMULTANEOUSLY
<PREVIOUS> + <OPEN/CLOSE>
CONNECT TO MAINS
PLAYER IS IN NORMAL MODE
WHEN PRESSING FRONT
KEYS, THE PLAYER WILL
RESPOND

TEST INSTRUCTIONS

1 AV Board

These test instructions can be used for all versions of the
AV board which has the following outputs:
• Audio L/R
• 5.1 Audio output
• Subwoofer output
• Optical / Coaxial digital output
• CVBS
• Y/G_vid,U/B_vid,V/R_vid output
• S-video
• Scart output
1.1 General
• All the waveforms measurement carried out in these
test instruction will be base on the testpoint indicated in
the AV board schematic diagram in the Service manual.
• Impedance of the measuring-equipment should be >
1MΩ
• Most of the tests can be done using either the
Diagnostic software " Player script" which can be found
in the chapter "Diagnostic Software description and
troubleshooting" or the Menu interface using the
Service PC with a terminal emulation program ( e.g.
Window Hyperterminal ) where it is possible to control
the execution of the Diagnostic Nuclei
• Setup for the measurement will be done in set level
with all modules connected as shown in the Wiring
Block diagram.
1.2 General Start-Up Measurement
Supply Check:
Before starting the measurement,ensure that all power
supply are connected to the AV board.
Pin nbr Supply
1010-9 -5V ( -Vcc )
1010-10 +5V
1010-11 +5V
The supply currents can be measured using a Tektronics
AM503B current probe or equivalent.
Supply Power consumption ( AVG )
+5V ± 3% I = 200mA
+5VA
+5V ± 3% I = 200mA
+5Vvid
-5V ± 3% I = 200mA
-5V
Clock Check
Ensure the present of the clock to the DAC
Clock Name Testpoint Frequency
11.2896MHz ± 0.02% tolerance
PCM_CLK TP10
Audio Mute Check
Measure the Audio mute voltage input at pin 12 of
connector 1010
Status Value
4.7V ± 10%
AudioMuteOn
-8V ± 10%
AudioMuteOff
DVD-S520/DV-S5450
18