Service manual

ViewSonic Corporation Confidential - Do Not Copy VA903b-1_ VA903m-1
19
104 AR3N TCON [6] NC ARED [6]/T29 ARED [6]
105 AR2P TCON [5] NC ARED [5]/TH ARED [5]
106 AR2N TCON [1] NC ARED [4]/TV ARED [4]
107 AR1P TCON [0] NC ARED [3]/TE ARED [3]
108 AR1N NC NC ARED [2]/TK ARED [2]
113 PWM2 /
COUT /
TCON[12]
PWM2 /
COUT /
TCON[12]
PWM2 /
COUT /
TCON[12]
ARED [1] PWM2 /
COUT /
TCON[12]
(9)
114 TCON [11]
/V[0]
V [0] V [0] ARED [0] TCON [11] (1), (7), (8)
115 TCON [10]
/V[1]
V [1] V [1] BRED [1] TCON [10] (1), (7), (8)
116 TCON [9] /
V[2]
V [2] V [2] BRED [0] TCON [9] (1), (7), (8)
117 TCON [8] /
V[3]
V [3] V [3] AGRN [1] TCON [8] (1), (7), (8)
118 TCON [7] /
V[4]
V [4] V [4] AGRN [0] TCON [7] (1), (7), (8)
119 TCON [6] /
V[5]
V [5] V [5] DHS DHS (1), (7), (8)
122 TCON [5] /
V[6]
V [6] V [6] DVS DVS (1), (7), (8)
123 TCON [1] /
V[7]
V [7] V [7] DENA DENA (1), (7), (8)
124 TCON [0] /
VCLK
VCLK VCLK DCLK / TCLK DCLK / TCLK (1), (7), (8)
 TMDS: 18 pins
Name I/O Pin No
Description
Note
TMDS_TST/ PWM1 AIO 9 TMDS_TEST Pin / PWM1 /
Power-on-latch for serial / parallel port
TMDS_GND G 10
TMDS_VDD P 11 (3.3V)
EXT_RES A 12 Impedance Match Reference.
TMDS_VDD P 13 (3.3V)
RX2P I 14 Differential Data Input
RX2N I 15 Differential Data Input
TMDS_GND G 16
RX1P I 17 Differential Data Input
RX1N I 18 Differential Data Input