Usb/Rs232; Keyboard - Grundig Berlin 32-8970 T Service Manual

GRUNDIG Service
Hauptplatte / Main Board – USB / RS232
R624 R624 0_DNS 0_DNS
1_RS 232_RD
RX D_ H
R626 R626 0_DNS 0_DNS
1_RS 232_TD
TX D_ H
USB_ PPO N
R238 R238 10K 10K
USB_ OC
C208 C208
0.1u F 0.1u F
USB_ DN
USB_ DP
Va ristor Va ristor
for the external module
RX _A DD_ON
1_RS 232_RD
TX _A DD_ON
1_RS 232_TD
Hauptplatte / Main Board – Keyboard
1_RS 232_RD
1_RS 232_TD 1_RS 232_TD
MCU_RX D2
R625 R625 0_DNS 0_DNS
MCU_ TX D2
R627 R627 0_DNS 0_DNS
U2 4 U2 4
5V
4 5
EN OC #
3 6
IN -2 OU T_ 3
R237 R237 10K 10K
2 7
IN _1 OU T_ 2
1 8
GN D OU T_ 1
TC 2 TC 2 + +
TPS 2051B DR-GP TPS 2051B DR-GP
100uF 100uF
R239 R239
0_DNS 0_DNS
R240 R240 0 0
L8 L8
RV 1 RV 1
4
3
Va ristor Va ristor AC M2012-121-2 P AC M2012-121-2 P
R242 R242 0 0
RV 2 RV 2
U9 0 U9 0
74HC4052 74HC4052
12 13
1Y0 1Z
14 3
1Y1 2Z
15
1Y2
11 10
1Y3 S0
6
E
9
S1
1
2Y0
5 16
2Y1 VC C
2 8
2Y2 GN D
4 7
2Y3 VEE
L10 L10
150_Ohm _600 mA 150_Ohm _600 mA
KEYPAD
CONNECTOR
C226 C226
0.1uF 0.1uF
CON1 0 CON1 0
0 0
IR
R375 R375
8
GND
7
3.3V
6
LED_RED
R385 R385 470R 470R
5
LED_GREEN
R380 R380 470R 470R
4
KEY_DRL
R377 R377 10 0 10 0
3
STAND_BY
2
GND
1
C227 C227
HEAD ER _2 MM_ 8 HEAD ER _2 MM_ 8
0.01uF 0.01uF
ST AND_ BY
JP 2 JP 2
3
2
1
2317-03S 2317-03S
RS 232_R X
RS 232_T X
2_RS 232_RD R569 R569
R570 R570
2_RS 232_TD R571 R571
R572 R572
VCCH1
TP 105 TP 105 TP 106 TP 106
+ +
TC 3 TC 3
100uF 100uF
CON8 CON8
1
VBu s
USBD MN S2
2
D-
3
D+
4
GN D
R241 R241
0_DNS _60 3 0_DNS _60 3 USB_ so k_ ve r USB_ so k_ ve r
1
USB_VERTICAL
2
USBD PL S2
R243 R243
0_DNS _603 0_DNS _603
3.3V
R632 R632
R629 R629
0_DNS 0_DNS
0_DNS 0_DNS
RX D_ H
TX D_ H
5V
R116 R116
4.7K 4.7K
5V
C642 C642
100nF /25V 100nF /25V
Q3 5 Q3 5
1
NP N_ BC 847B NP N_ BC 847B
3V _S B
TP 77 TP 77
3V _S B
IN FR AR ED
IN FR AR ED
LE D_RO
LE D_GO
BT N_A DC1
BT N_A DC1
C228 C228
100pF 100pF
37
to SCART 2
0 0 2R XD 2J P
0 0 2R XD 2V GA
2R XD 2V GA
to VGA
0 0 2T XD 2J P
2T XD 2V GA
0 0
2T XD 2V GA
Power Switch
TPS2051
Current Sense
CS
IN
Charge
Pump
Current
EN
Driver
Limit
UVLO
Thermal
GND Sense
R143 R143
UA RT _S W1
4.7K 4.7K
R139 R139
4.7K 4.7K
LED RED
LED GREEN
Chassis SR
OUT
OC