GRUNDIG Service
21
GDV 110
Test Instructions
2. Audio Path
For the next test, the A/V-MUX Board must be connected to the
Monoboard.
Ref. #
Command
Remark
21a
AudioSineOn
Audio MMA/AC3 Sinus On
21b
AudioSineOff
Audio MMA/AC3 Sinus Off
The level of the 1kHz-tone, which is generated by Service Test Level
21a, must be 1.8V
rms
±
0.25V at the audio chinch sockets.
With the following commands, the Audio de-emphasis and Audio mute
can be checked.
Ref. #
Command
Remark
Testpoint
Level
18a
AudioDeemp0On Audio-De-emphasis 0 On
1208-(3)
>3.0V
18b
AudioDeemp0Off Audio-De-emphasis 0 Off
1208-(3)
<0.2V
18a
AudioDeemp1On Audio-De-emphasis 1 On
1208-(4)
>3.0V
18b
AudioDeemp1Off Audio-De-emphasis 1 Off
1208-(4)
<0.2V
19a
AudioMuteOn
Audio-Mute On
1208-(11)
>3.0V
19b
AudioMuteOff
Audio-Mute Off
1208-(11)
<0.2V
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 Monoboard
will operate in CDDA transparent mode.
Ref. #
Command
Remark
20
PapS2bEcho
S2B Echo
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
Remark
23a
VideoColDencOn
Colourbar DENC On
23b
VideoColDencOff
Colourbar DENC Off
With Colourbar On(23a), the following can be measured on the EURO-
AV socket:
Signal
EURO-AV contact
Level
CVBS burst
19
300mV
PP
±
15%
CVBS sync
19
300mV
PP
±
15%
CVBS white level
19
700mV
PP
±
15%
CVBS chroma
19
450mV
PP
±
15%
EURO-AV – blue
7
900mV
pp
±
15%
EURO-AV – green
11
900mV
PP
±
15%
EURO-AV – red
15
900mV
PP
±
15%
The Euro-AV-switching voltage can be 0V, 6V, 12V.
Check at connector 1400-(15) the output-voltage while using next
commands:
Ref. #
Command
Remark
25a
VideoScartLo
Output Level 0V
±
10%
25b
VideoScartMi
Output Level 6V
±
10%
25c
VideoScartHi
Output Level 12V
±
10%
GB
Test Instructions Monoboard
General
• Impedance of measuring-equipment should be > 1M
Ω
.
• To check the Monoboard 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. 16) single
components of the Monoboard can be checked.
Remark: Connect Service-PC to Service Serial Interface and call
operating variant (C)ommand (p. 16 / 17).
The most important functions can be checked by the numbers
(Ref. #) or commands. The messages on the PC-Monitor are
described at p. 18 (4. Service Test Level).
1. DVD Decoder/Host Processor IC7200
1.1 Check initialisation
While switching on the supply check next reset timing:
DC, 2V/div, 100ms/div
T1~200ms
T2~500ms
Power ON
+3V3
Connector 1200-(1)
Reset IN
IC7200-(29)
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
Testpoint
Frequency
27M_CLK
IC7200-(118)
27MHz
PCM_CLK
IC7200-(45)
13.5MHz
1.3 Softwaretests
The following commands are testing the most important components
of IC7200.
Ref. #
Command
Remark
6
PapChksFl
Checksum FLASH
7a
PapUclkAclkCdda
µ
Clock A CLK in CD-DA mode
7b
PapUclkAclkDvd
µ
Clock A CLK in DVD mode
9
PapDramWrR
DRAM Write Read
10
PapFlashWrAcc
FLASH Write Access
11
PapI2cNvram
I2C NVRAM access
12
PapI2cDisp
I2C Display PWB
13
PapS2bEcho
S2B Echo
14
PapS2bPass
S2B Pass-through
15
PapNvramWrR
NVRAM Write Read
Check audioclockfrequencys (tolerance
±
0.01%):
Clock
Testpoint
Frequency
ACLK
1208-(5)
12.288MHz
WST
1208-(8)
48.0kHz
SCKT
1208-(7)
3.072MHz
