Test Instruction Front Display And Audio/Video Board; Audio Dac And Amplifier; General Start-Up Measurement; Video Output And Buffer Amplifier - Yamaha DVD-S530 Service Manual

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DVD-S530/DV-S5550

TEST INSTRUCTION FRONT DISPLAY AND AUDIO/VIDEO BOARD

1. General
• All the waveforms measurement carried out in these
test instruction will be based on the testpoint indicated
in the A/V Board and Front Display 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.

2. General Start-Up Measurement

Supply Check:
Before starting the measurement,ensure that all power
supplies are connected to the A/V and Front Display board
via conn.1101 and 1114/1133.
Pin nr.
A/V Board
Voltage Conn. 1101
1
+3V3STBY
2
+3V3STBY
3
GND
4
+12VSTBY
5
GND
6
+5VSTBY
7
GND
8
-8V
Clock Check
Confirm the presence of the clock to the DAC and the
slave µP.
Clock Name Testpoint Frequency
PCM_CLK
I173
XOUT
S1
Audio Mute Check
Measure the Audio mute voltage input at pin 22 of
connector 1100.
Status
AudioMuteOn HIGH (>3V)
AudioMuteOff LOW (<3V)
To toggle between ON and OFF,use the following
commands:
Ref.#
19a
19b
20
Front Display
Conn. 1114/1133
+5VSTBY
+12VSTBY
GND
-32V
-
-
-
-
11.2896MHz ± 0.02% tolerance
8MHz ± 0.2% tolerance
Value
Command
Name
Remarks
AudioMuteOn Audio Mute On
AudioMuteOff Audio Mute Off

3. Audio DAC And Amplifier

Ensure that the Audio mute signal is OFF
To check the DAC and buffer amplifier,send the following
commands:
Ref.#
Command Name
Remarks
21a
AudioSineOn
Audio Sine
signal ON
----
Press stop button
Audio Sine
signal OFF
20a
AudioPinkNoiseOn Audio
Pinknoise ON
20b
AudioPinkNoiseOff Audio
Pinknoise OFF
The audio signal ( sine or pink noise ) will also be present
on the digital output ( SPDIF ).This can be checked by
connecting the digital signal to an amplifier with a digital
input.
Check the I2S and audio signal at the following testpoints:
Name
PCM_LRCLK
PCM_SCLK
PCM_CLK
PCM_DATA0
PCM_DATA1
PCM_DATA2
DIG_OUT
AUDIO L/R OUT
FRONT L/R OUT
SURROUND L/R OUT
CENTER OUT
SUB WOOFER L/R OUT
All waveforms can be refered to the A/V board schematic
diagram.

4. Video Output And Buffer Amplifier

Check DC output-level at all video cinch output : 1.0V DC
±10%
Generate a color bar using the following software
commands:
Ref.#
Command Name Remarks
23a
VideoColDencOn
23b
VideoColDencOff
Check the video outputs at the following testpoints:
Name
Testpoint
BLUE
I123
GREEN
I124
RED
I125
CVBS out
I180 / I195 / I145
S-Video-C out I122
S-Video-Y out I121
Audio output
Sine,1Khz on
stereo
No waveform
Pink Noise on
6 channels
No waveform
Testpoint
I172
I175
I173
I174
NA
NA
I235
I226 / I236
NA
NA
NA
I165
Color DENC ON
Colorbar DENC OFF

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