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GRUNDIG Service
CS4338
DEM/SCLK
2
LRCK
3
Serial Input
De-emphasis
Interface
1
SDATA
∆ ∑
Interpolator
Modulator
∆ ∑
Interpolator
Modulator
4
MCLK
Pin Pin Name Type
1
SDATA
Digital input
2
DEM/SCLK Digital input
3
LRCK
Digital input
4
MCLK
Digital input
5
AOUTR
Analogue output
6
AGND
Ground
7
VA
Supply
8
AOUTL
Analogue output
Fehlersuchdigramme / Trouble Shouting Diagrams
1. Power Supply Trouble Service Flow Chart
Power Supply
Block Trouble
Check F301 Condition
OK
Check U301 Pin6- Pin8 Condition
OK
Check On D352/D355/ D354/D357/
D358 Output Voltage Condition
NG
Check on U341 Pin1
Voltage Condition 2~5V
NG
Replace U302
Check J1/J3/J4 Output Voltage
2. Read Disc Trouble Service Flow Chart
Read disc problem in a DVD player is a very complicated issue that
may involve complex issues. This problem is not only relation to the
electronic circuit, but also very much relation to the operation environ-
ment.
DVD loading unit is a very complicate part that contains big number of
ESD components, which require specific equipment, tools and tech-
nique to repair; in general, service technician is not suggested to
disassemble the DVD loading unit. It is suggest proving the trouble and
replacing the complete DVD loading unit, instead of repairing the DVD
loading unit in local workshop.
It is suggested to prove the faulty of a DVD loading unit by replacement
by a good DVD loading unit.
Before checking the "NO Disc" Trouble, ensure excluding the following
possibilities:
– The test disc is damage.
– AC power supply voltage dropped below the minimum required level.
– DVD disc region code and color system is not matching to the DVD
player or system setting.
– Moisture condensed inside the unit. (Power on the unit, without disc
loaded, for 1/2 to 2 hours).
AGND
VA
6
7
Voltage
Reference
Analog
DAC
8
AOUTL
LPF
Analog
5
AOUTR
DAC
LPF
Function CS4338
Serial Audio Data Input - two's complement MSB-first serial data is input on this pin. The data is clocked into the CS4334 via internal or
external SCLK, and the channel is determined by LRCK.
De-Emphasis/External Serial Clock Input - used for de-emphasis filter control or external serial clock input.
Left/Right Clock - determines which channel is currently being input on the Audio Serial Data Input pin, SDATA.
Master Clock - frequency must be 256x, 384x, or 512x the input sample rate in BRM and either 128x or 192x the input sample rate in HRM.
Analog Right Channel Output - typically 3.5 Vpp for a full-scale input signal.
Analog Ground - analog ground reference is 0V.
Analog Power - analog power supply is nominally +5V.
Analog Left Channel Output - typically 3.5 Vpp for a full-scale input signal.
NG
Replace F301
NG
Replace U301
OK
NG
Replace U341
NG
Replace T301
OK
SDATA
AOUTL
1
8
DEM/SCLKK
2
7
VA
LRCK
3
6
AGND
MCLK
4
5
AOUTR
Service Flow Chart
Read DISC Trouble
Check DU5F_ATAPI I/F
Connector Condition
OK
Replace DVD Loading Unit
NG
Check the DU5F_ATAPI
I/F Interface Circuit
3. Video Trouble Service Flow Chart
3.1 Composite Video Trouble Service Flow Chart
Composite Video Trouble
Check "SETUP" Item
OK
Check Y1 Output Signal
OK
Check C50 Signal
OK
Check C52 Signal
OK
Check CN505 Pin Signal
NG
Check L506 Signal
OK
Replace between
CN501 and CN1 Cable
2 - 20
GDP 2200
NG
Replace Connector
Check the other Parts by
Replacement Method
NG
See "User Manual"
NG
Replace Y1 Parts
NG
Replace C50 or U1
NG
Replace C52/L11/R43
OK
Check External Set
NG
Replace L506
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