ëî
4. Smaller boards
Keypad
function
1.chk U1 voltage source(5V)
2.chk U1 output signal (always 5Vdc in regular time,no pulse voltage)
Yes
Yes
No
No
No
Rear Front IR
function
FAN/BD
Fan control:
1.chk the voltage of QF1 (5,6,7,8)
2.chk the fan voltage U502(2,15),U503(8)
3.check Y501(32.768kHz)
No 5V
1.Check Q701 & thermal Breaker
LED dark
1.chk LED voltage from J1
2.chk the mounting direction of LEDs
No work
1.chk buttons contact to PCB
Summary of Contents for RD-JT51
Page 13: ...13 2 JT50 52 ...
Page 14: ...14 7 Packaging Description 1 JT51 ...
Page 15: ...15 2 JT50 52 ...
Page 16: ...16 8 Appearance Description ...
Page 53: ...ëí 5 PFC BOARD 6 DC DC BOARD ...
Page 54: ...ëì JT50 52 1 Final Assembly Trouble Shooting Guide ...
Page 55: ...ëë ...
Page 56: ...ëê 2 Engine Assembly Trouble Shooting Guide ...
Page 58: ...ëè 4 Power Supply Trouble Shooting Guide PFC BOARD DX850 DC DC BOARD ...
Page 59: ...5ç 5 DMD Block Trouble Shooting Guide ...
Page 60: ...êð ...
Page 74: ...éì Step 7 Download finished Step 8 Turn off the power switch ...
Page 81: ......