Akai LCT2715 Service Manual page 26

A
UP1_2
UP1_2
UP3_1
UP3_1
4
OBO0
OBO0
OBO1
OBO1
OBO2
OBO2
OBO3
OBO3
URST# URST# 3,6 OBO4
OBO4
OBO5
OBO5
IR
IR 3
OBO6
OBO6
OBO7
OBO7
UP3_0
UP3_0 6
PWM0
PWM0
KEYPAD - MAX 8-KEYS
3
5VSB
R14 R13
10K 10K
R0603/SMD
R0603/SMD
R9 4.7K
OBO6 Q1
1
2N3906
R10
OBO7 4.7K
1
DV33A
2
1
A
B
6
6,8
3
3
3
3
3
3
3
VCC
3
R336
3
PWM0
OBO0 L81 FB TV/AV
OBO1 L82 FB MENU
OBO2 L83 FB VOL-
POWER ON/OFF
OBO3 L84 FB VOL+
OBO4 L85 FB CH-
OBO5 L86 FB CH+
R2 510 IR
LED_RED
R4 510 LED_GRN
UP1_2
R81 0
DV33A
Q2 R57 IR & POWER ON LED 0
5VSB
2N3906
B
C
PANEL INVERTER POWER
Inverter_PWR
+ CE1 + CE2 + CE3 CB1
470uF/50v 470uF/50v 470uF/50v 0.1uF
Inverter_PWR
0
R285
10k
R286
Dimming
R288 100k
Back Light circuit Q12 CB190
1
2N3904 0.1uF VCC
SOT23/SMD
4.7k
R291
10k
BL_ON/OFF
R293
UP3_0 1 Q13
2N3904
4.7k SOT23/SMD
J12
1
2
3
4
5
6
7
8
9
10
11
12
12x1 W/HOUSING
DIP12/W/H/P2.0
C
D
Inverter_PWR
FOR CHI-MEI INVERTER
CB2
CONNECTOR
0.1uF
PWR_GND
J10
1
2
3
4
5
6
TP1
7
8
9
VCC SELECT Hi For External
10
11
SELECT Low For Internal
12
R289
12x1 W/HOUSING R.A R
R50 DIP12/WH/P2.0/R
0
SELECT
R290
0
J11
Inverter_PWR 1
2
3
4
5
6
7
8
9
10
PWR_GND
10x1 W/HOUSING R.A.
DIP10/WH/P2.0/R
L89 L90
FB FB
BEAD/SMD/1206 BEAD/SMD/1206
Title
LCD TV - MediaTek MT8205 Solution
Size Doc Number
C
Date: Tuesday, May 10, 2005
D
E
4
3
2
1
Rev
BACK_LIGHT/KEYPAD
V0.1
Sheet 15 of 16
E