Grundig Scenos UMS 4400 DVD, Service Manual

Page: 26 / 44

GRUNDIG Service
SCENOS UMS 4400 DVD
3 - 11
Display
Segment
Driver/
Grid
Driver/
Key Scan
Output
Serial
Data
Interface
Control
Display Memory
(20 bits x 16 Words)
OSC
General
Input
Register
LED
Driver
Timing Generator
Key Matrix Memory
Dimming Circuit
Grid
Driver
VEE GND VDD K4 K3 K2 K1
GR1
GR2
GR3
GR4
GR5
GR6
GR7
GR8
SG20/GR9
SG19/GR10
SG18/GR11
SG17/GR12
SG16/GR13
SG15/GR14
SG14/GR15
SG13/GR16
SG12/KS12
SG11/KS11
SG10/KS10
SG9/KS9
SG8/KS8
SG7/KS7
SG6/KS6
SG5/KS5
SG4/KS4
SG3/KS3
SG2/KS2
SG1/KS1
DIN
DOUT
CLK
STB
VDD
OSC
R
SW1
SW2
SW3
LED1
LED2
LED3
LED4
LED5
PT6311
SW4
to CN801
P. 3 - 3
to CN203
P. 3 - 6