2-1
2-1
Check Audio BD power
supply UA1
Pin19,12=+/-12V, Pin4,27
have signal or not
Possible UA1 bad
cause
Check Front BD CPU/U5
Pin1/SCLK
Pin63/SCE
Pin64/SD1
Prologic BD U3
Pin22/D1
Pin23/CLK
Pin24/CE
Audio BD UA1
Pin13/CE
Pin14/D1
Pin15/CL
Possible UA1 bad
cause or U5
Possible U3 bad
cause
Check to Tuner BD
Control data signal
Audio BD CBL 12/Pin
9.10.11.12.13.14
No
Yes
Check to Tuner BD
power supply
Tuner no
output
Check Audio
BD/QA1,QA2
Check Front BD
CPU/U5
Pin49=4.7V
Possible CPU
bad cause
Audio output
No sound
All channel no sound
Check CBL4B
Pin4 Tuner
EN=4.7V
Yes
Check the data from Front
BD CPU U5/Pin 50/ST
Pin 51/PLL SD
Pin 52/PLL CLK
Pin 53/PLL DI
Pin 54/PLL D0
Pin 55/PLL CE
No
Possible CPU U5 bad
cause damage
No data
Check AMP BD channel
output Relay RL1,2,3 is
working or not
Yes
working
Yes
working
Yes
Yes
Check Prologic BD
U3/pin3,9,14,17,1,2
U4/pin2,19,7,14 signal
No
Possible cause
U3 bad/damage
No
No
Not work
Repair power supply
circuit
Check R20/10K (+5V up tug)
or CPU/U5 damage
Check Front BD CPU/U5
Pin5=4.8VDC
Check Prologic BD MUTE
circuit Q15 electrode
B>0.7VDC
Check Prologic BD
U3,U2,U5,U1 power supply
Yes
No Signal
No
Yes
Yes
No
No
No
A
Check protection circuit
(AMP BD)
IC/U6 Pin6=0VDC
Pin1=0VDC, Pin2<0.7VDC
Check power AMP IC
U1,2,3,4,5/Pin3=0VDC
Check the channel unnormal
operation power AMP section
No
Pin 2 No
Pin 1 No
Check power /-36V
Q2/9015, Q3/9014
No
Yes
Check Front BD CPU
U5/Pin2=4.8VDC or change
CPU/UPD780023QFP
Yes
No
Change Q2/9014
Change Q4/8550
Check PSU BD Q4
electrode B=0V
Check PSU BD
CBL03A PWR
SW/Pin6=4.8V
Not working
Re-insert and fix the
cable
No
No
Yes
Change the fuse
12A/250VAC
Repair/Replace DVD
Main BD
Possible
Prologic BD
U3 damage
DVD Audio
no output
Check Prologic BD
CBL10
5.1CH Input
Check all cable is loose
or bad INT
Check the Fuse F1 &
F2(Amp BD)
Check the power Relay
(PSU BD) is working or
not
Check PSU BD CBL02A
Pin 1=5V, Pin 3=12V,
Pin 5 = -12V
Yes
MX10xxD Repair Chart
Main Unit
A
C
B
Audio output
No sound
Video output
No picture
No sound &
picture output
MX10xxD REPAIR CHART
Содержание MX-1050D
Страница 16: ...4 1 4 1 SET BLOCK DIAGRAM MX10 Block Diagram dd wk124 4 ...
Страница 17: ...4 2 4 2 SET WIRING DIAGRAM ...
Страница 29: ...7 2 TUNER CIRCUIT ...
Страница 35: ...DVD MAIN BOARD TOP VIEW 9 2 9 2 DVD MAIN BOARD BOTTOM VIEW ...
Страница 36: ...9 3 9 3 DVD CIRCUIT 1 ...
Страница 37: ...9 4 9 4 DVD CIRCUIT 2 ...
Страница 38: ...DVD CIRCUIT 3 9 5 9 5 ...
Страница 39: ...DVD CIRCUIT 4 9 6 9 6 ...