MS6M182.21X

  • 格式:pdf
  • 大小:406.67 KB
  • 文档页数:10

T.MS6M182.21X Maintenance Manual
Author:BaoXiang_Huang Checked By :日期:2011.11.08 19:47:55
+08'00'
Check pin1 of CN1 for 5V
1、Check peripheral power
supply
2、check the power supply
NG
Check pin 7、8 of CN1 for
5V
Check pin10 of CN1 for
12V
OK
NG
1、Check Q1、Q4
2、repair the circuit of
Q1&Q4
OK
Check U1 for 3.3V
NG
OK
Check the circuit between U1
and U9
1、change U1
2、change U9.
1. Power supply Trouble
Check pin2 of L1 for 1.26V
NG
1、Check U2
2、Repair the circuit of
U2
1、check U5 for 1.8V
2、check U4 for 2.5V
3、check U3 for 3.3V
OK
1、repair the circuit of U5 or U9
2、repair the circuit of U4 or change U9
3、repair the circuit of U3 or change U9
NG
Check if the LVDS cable is right and if
well connected with the board
Check if the LCD panel is OK
1、reconnect the cable;
2、Change the LVDS cable
Change panel
Check if between the LVDS jack and
U9 are well soldered
Repair the damage
circuit
Change U9
2. Display Trouble(Abnormal Screen)
OK
NG
OK
NG
NG
OK
Check the power supply for panel
Check the switch signal on the G-pole of Q6/ WPM3407
(voltage changes from 5V to 0V, or
from 12V to 0V)
Check the LVDS signal from U9
change Q6
Repair control circuit for Q7
Change the panel or the LVDS cable
Change U9
NG
OK
NG
OK
NG
OK
Check CN2 for the BLON
Signal(3.3V~5V)
Check the power supply
for inverter
Repair the circuit between the pin3 of CN2 and the pin 129 of U9
Repair inverter power
supply
Repair the inverter
NG
OK
NG
OK
5. Audio Trouble(No Sound)
Check if audio signal Input is normal
Repair external audio equipment
NG
Check if the volume is rightly set or if
mute function is off
OK
Set it rightly
NG
OK
Check if the output signal on the pin 11、12 & pin39、40 of UA1 is normal
Repair the speaker
Check pin13、14、37、38 of UA1/R2A15122FP for the power
supply(24V)
O K
NG
Repair the circuit of
DA1 or LA3
NG
OK
Check the voltage (>0.7V) on pin 34
of UA1
Does QA1、QA2 has damage And repair DA2
Check the signal output from pin
64& pin 65 of U9
NG OK
Check if the audio signal input to U9 is OK
NG
OK
Repair the circuit between U9 and UA1
No channel be find
Check the RF cable for RF signal
repair external RF
equipment Check the pin 7 of T1 or T2 for 5V
(Check the pin 8 of T3 or T4 for 5V)
Repair the power net connecting to this pin
Check the pin 4 & pin 5 of T2 or
pin6&pin7 of T1、T3 and T4for I2C
data
Check the pin 9&pin10 of T1 and T3、
pin10&pin11 of T2 or pin11&pin12 of T4
f or IF signal
Check pin 1 of T1 for
AGC signal(0.7V~2.5V)
1、Repair the AGC
net
2、Repair the circuit of R1、R327、R329Change T1、T2、T3 or T4
Repair I2C net(connect to the pin 82 & pin 83 of U9)
NG
OK NG
OK NG
OK NG
OK
NG
OK
Repair the circuit between Tuner
and U9OK
Check the circuit between Tuner
and pin74&pin75 of U9
Change the U9
NG
No sound but image Is it the same on AV?
Refer to “5. Audio Trouble(no sound)”
Check if the sound system
is rightly set
1、Repair the circuit
between Tuner and U9
2、Change Tuner or
Change U9
Set it rightly
OK
OK
NG
NG
OK
Picture is not in
center
Color fade
Image is not
stable
No signal
Do “Auto adjust“ process Check U9 for R.G.B signal Reset the DDC
Repair R.G.B circuit
Check if VS signal & HS
signal are regular
Repair the circuit
of VS, HS
1. Reset the OSD configuration
2. It’s an unsupported mode
Repair the circuit
of VS, HS 8. Function Trouble(PC)
OK
NG
OK
NG
1. YPBPR no signal
2. YPBPR missing colors
HDMI no signal
CVBS no signal
1. SCART no signal
2. SCART missing colors
1、check the voltage of pin207 of U9(>0.7V )
2、Repair the Circuit of the SCART-CVBS or R.G.B
1. HDMI terminal is badly soldered
2. DDC setting is wrong and reset it
3. Change U9
1. Repair R124、R126、R293
2. Repair the circuits connecting U8 or change U8
9. Function Trouble(HDMI, YPbPr, SCART, CVBS)
1. Repair C57、C58、R224、R291
2. Change U9。