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Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
GB
Test Instructions – Digital Board
General
• Impedance of measuring-equipment should be > 1MΩ.
• To check the Digital Board a Drive Mechanism with DVD-Disc or a
B.E.-Emulator must be connected to the I2S input.
• The analogsignals Audio and Video must be measurable at the
A/V-MUX-Board.
• With the PC Systemtest of the Service Test Software (p. 3-13) single
components of the Digital Board can be checked.
Remark: Connect Service-PC to Service Serial Interface and call
operating variant (C)ommand (p. 3-13 / 3-14).
The most important functions can be checked by the numbers
(Ref. #) or commands. The messages on the PC-Monitor are
described at p. 3-15 (4. Service Test Level).
1. DVD Decoder/Host Processor IC7200
1.1 Check initialisation
While switching on the supply check next reset timing:
Power ON
T1~200ms
T2~500ms
DC, 2V/div, 100ms/div
Check operating voltages VDD1...17 of IC7200: >3.10V
Check ground connections GND1...17 of IC7200: <0.2V
1.2 Clock check
The tolerance of all clocks is maximum 0,01%.
Clock
27M_CLK
PCM_CLK
1.3 Softwaretests
The following commands are testing the most important components
of IC7200.
Ref. #
Command
6
PapChksFl
7a
PapUclkAclkCdda
7b
PapUclkAclkDvd
9
PapDramWrR
10
PapFlashWrAcc
11
PapI2cNvram
12
PapI2cDisp
13
PapS2bEcho
14
PapS2bPass
15
PapNvramWrR
Check audioclockfrequencys (tolerance ±0.01%):
Clock
Testpoint
ACLK
1208-(5)
WST
1208-(8)
SCKT
1208-(7)
4 - 46
+3V3
Connector 1200-(1)
Reset IN
IC7200-(29)
Testpoint
Frequency
IC7200-(118)
27MHz
IC7200-(45)
13.5MHz
Remark
Checksum FLASH
µClock A CLK in CD-DA mode
µClock A CLK in DVD mode
DRAM Write Read
FLASH Write Access
I2C NVRAM access
I2C Display PWB
S2B Echo
S2B Pass-through
NVRAM Write Read
Frequency
12.288MHz
48.0kHz
3.072MHz
2. Audio Path
For the next test, the A/V-MUX Board must be connected to the Digital
Board.
Ref. #
Command
21a
AudioPinkNoiseOn
21b
AudioPinkNoiseOff
21a
AudioSineOn
21b
AudioSineOff
The level of the 1kHz-tone, which is generated by Service Test Level
±0.25V at the audio chinch sockets.
21a, must be 1.8V
rms
With the following commands, the Audio de-emphasis and Audio mute
can be checked.
Ref. #
Command
Remark
18a
AudioDeemp0On Audio-De-emphasis 0 On 1208-(3)
18b
AudioDeemp0Off Audio-De-emphasis 0 Off 1208-(3)
18a
AudioDeemp1On Audio-De-emphasis 1 On 1208-(4)
18b
AudioDeemp1Off Audio-De-emphasis 1 Off 1208-(4)
19a
AudioMuteOn
Audio-Mute On
19b
AudioMuteOff
Audio-Mute Off
With the following commands we test if the S2B communication with
the B.E .-Emulator is O.K. and then via the second test the Digital Board
will operate in CDDA transparent mode.
Ref. #
Command
20
PapS2bEcho
3. Video Path
To check a large part of the video-path (DSM-LSI-DVP-Denc) a
colorbar can be generated via next commands:
Ref. #
Command
23a
VideoColDencOn
23b
VideoColDencOff
With Colourbar On(23a), the following can be measured on the EURO-
AV socket:
Signal
EURO-AV contact
CVBS burst
CVBS sync
CVBS white level
CVBS chroma
EURO-AV – blue
EURO-AV – green
EURO-AV – red
The Euro-AV-switching voltage can be 0V, 6V, 12V.
Check at connector 1400-(15) the output-voltage while using next
commands:
Ref. #
Command
25a
VideoScartLo
25b
VideoScartMi
25c
VideoScartHi
GDV 100 D/002
Remark
Audio Pink Noise On (optional)
Audio Pink Noise Off
Audio MMA/AC3 Sinus On
Audio MMA/AC3 Sinus Off
Testpoint
Level
>3.0V
<0.2V
>3.0V
<0.2V
1208-(11)
>3.0V
1208-(11)
<0.2V
Remark
S2B Echo
Remark
Colourbar DENC On
Colourbar DENC Off
Level
±15%
19
300mV
PP
±15%
19
300mV
PP
±15%
19
700mV
PP
±15%
19
450mV
PP
±15%
7
900mV
pp
±15%
11
900mV
PP
±15%
15
900mV
PP
Remark
Output Level 0V ±10%
Output Level 6V ±10%
Output Level 12V ±10%
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