GDV 110Test Instructions
GB2. Audio Path Test Instructions Monoboard
For the next test, the A/V-MUX Board must be connected to the
GeneralMonoboard.
Y Impedance of measuring-equipment should be > 1MW.
Y To check the Monoboard a Drive Mechanism with DVD-Disc or aRef. #CommandRemark
B.E.-Emulator must be connected to the I2S input.21aAudioSineOnAudio MMA/AC3 Sinus On
Y The analogsignals Audio and Video must be measurable at the21bAudioSineOffAudio MMA/AC3 Sinus Off
A/V-MUX-Board.
Y With the PC Systemtest of the Service Test Software (p.The level of the 1kHz-tone, which is generated by Service Test Level16) single
components of the Monoboard can be checked.21a, must be 1.8V ?0.25V at the audio chinch sockets.
rms
Remark: Connect Service-PC to Service Serial Interface and call
With the following commands, the Audio de-emphasis and Audio mute
operating variant (C)ommand (p. 16 / 17).
can be checked.
The most important functions can be checked by the numbers
(Ref. #) or commands. The messages on the PC-Monitor are
Ref. # CommandRemarkTestpointLevel
described at p. 18 (4. Service Test Level).
18aAudioDeemp0On Audio-De-emphasis 0 On 1208-(3)>3.0V
1. DVD Decoder/Host Processor IC720018bAudioDeemp0Off Audio-De-emphasis 0 Off 1208-(3)<0.2V
1.1 Check initialisation18aAudioDeemp1On Audio-De-emphasis 1 On 1208-(4)>3.0V
18bAudioDeemp1Off Audio-De-emphasis 1 Off 1208-(4)<0.2V
While switching on the supply check next reset timing:
19aAudioMuteOnAudio-Mute On1208-(11)>3.0V
19bAudioMuteOffAudio-Mute Off1208-(11)<0.2V
Power ON
With the following commands we test if the S2B communication with
+3V3
Connector 1200-(1) the B.E .-Emulator is O.K. and then via the second test the Monoboard
will operate in CDDA transparent mode.
T1~200ms
Ref. #CommandRemark
Reset IN20PapS2bEchoS2B Echo
IC7200-(29)
T2~500ms3. Video Path
DC, 2V/div, 100ms/div
To check a large part of the video-path (DSM-LSI-DVP-Denc) a
colorbar can be generated via next commands:
Check operating voltages VDD1�17 of IC7200: >3.10V
Check ground connections GND1�17 of IC7200: <0.2V
1.2 Clock checkRef. #CommandRemark
The tolerance of all clocks is maximum 0,01%.23aVideoColDencOnColourbar DENC On
23bVideoColDencOffColourbar DENC Off
ClockTestpointFrequency
27M_CLKIC7200-(118)27MHzWith Colourbar On(23a), the following can be measured on the EURO-
PCM_CLKIC7200-(45)13.5MHzAV socket:
SignalEURO-AV contactLevel
1.3 Softwaretests
CVBS burst19300mV ?15%
PP
The following commands are testing the most important components
CVBS sync19300mVPP ?15%
of IC7200.
CVBS white level19700mVPP ?15%
Ref. #CommandRemarkCVBS chroma19450mVPP ?15%
6PapChksFlChecksum FLASHEURO-AV � blue7900mVpp ?15%
7aPapUclkAclkCddamClock A CLK in CD-DA modeEURO-AV � green11900mVPP ?15%
7bPapUclkAclkDvdmClock A CLK in DVD modeEURO-AV � red15900mVPP ?15%
9PapDramWrRDRAM Write Read
The Euro-AV-switching voltage can be 0V, 6V, 12V.
10PapFlashWrAccFLASH Write Access
Check at connector 1400-(15) the output-voltage while using next
11PapI2cNvramI2C NVRAM access
commands:
12PapI2cDispI2C Display PWB
13PapS2bEchoS2B EchoRef. #CommandRemark
14PapS2bPassS2B Pass-through25aVideoScartLoOutput Level 0V ?10%
25bVideoScartMiOutput Level 6V ?10%
15PapNvramWrRNVRAM Write Read
25cVideoScartHiOutput Level 12V ?10%
Check audioclockfrequencys (tolerance ?0.01%):
ClockTestpointFrequency
ACLK1208-(5)12.288MHz
WST1208-(8)48.0kHz
SCKT1208-(7)3.072MHz
GRUNDIG Service21 |
ACEC
