A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
STRAIGHT/2.5
STRAIGHT/2.5
MainBoard
connector
VR
3
3' 2' 2
1
AudioBoard
connector
1'
404A79
1A
SCHEMATIC, KEY/B VT-901 LAM999
A3
2
2
Thursday, July 18, 2002
Title
Size
Document Number
Rev
Date:
Sheet
of
KEY_R
KEY_PWR
LED_Y
LED_G
KEY_L
KEY_DOWN
KEY_UP
MUTE
ROUT
L_EAR
R_EAR
MUTE
LIN_1
RIN_1
LIN_2
RIN_2
LOUT
GND
GND
VR1
50K
1,1'
2'
3
2
3'
S3
PT-002-B2
J4
ACES_87502_0200
1
2
S1
PT-002-B2
S5
PT-002-B2
S4
PT-002-B2
S2
PT-002-B2
J3
ACES_87502_0200
1
2
D1
LYG2093 YEL/GRN
3
2
1
J2
SCJ-0348-C
4
5
6
8
1
2
7
3
LI1
LO
NC
RO
GND
LI2
RI1
RI2
J5
E&T_96113_1013
1
2
3
4
5
6
7
8
9
10
J1
E&T_96113_1113
1
2
3
4
5
6
7
8
9
10
11
Summary of Contents for AL922
Page 21: ...21 3 3 BLOCK DIAGRAM ...
Page 31: ...31 7 TROUBLESHOOTING 7 1 Main Procedure ...
Page 32: ...32 7 1 1 Power Circuit Troubleshooting ...
Page 33: ...33 7 1 2 Backlights Troubleshooting ...
Page 34: ...34 7 1 3 Performance Troubleshooting ...
Page 35: ...35 7 1 4 Function Troubleshooting ...
Page 38: ...38 Back Cover Cable Cover Gap 0 8 mm B 1 2 mm Base Cover Neck Cover Gap 0 8 mm C 1 2 mm ...
Page 42: ...42 WAVESHAPE ...
Page 48: ...48 APPENDIX A PARTS LISTS ...
Page 50: ...50 A 4 461A7830011 Firmware Ctrl Board VL 901 ...
Page 53: ...53 APPENDIX B DISPLAY UNIT ASSEMBLY ...