16
DVD-2910/955
TROUBLE SHOOTING
1. GU-3612 MAIN UNIT
1.1. FL TUBE doesn’t light
(1) Check the Set-up process of Syatem
µ
-COM
Check Power Supply Voltages.
GU-3612 (MAIN UNIT)
• [IC318] : 80, 14
+3.3V_D1, +3.3V_NSW
N.G.
Check Soldering.
• CX141 on MAIN UNIT.
O.K.
Check Oscillation waveform.
GU-3612 (MAIN UNIT)
• [IC318] :
16MHz at 13pin.
N.G.
Check Soldering.
• X302 on MAIN UNIT.
O.K.
Check Power Supply Voltages.
GU-3612 (MAIN UNIT)
• [IC318] :
"H" level at 39pin? "L" level at 7pin and
44pin?
N.G.
Check Soldering.
• IC318 on MAIN UNIT.
O.K.
Check Reset Signal
GU-3612(MAIN UNIT)
• [IC318] :
"H" level at 10pin?
N.G.
Check Soldering.
• IC319 (Reset IC) on MAIN UNIT.
O.K.
Check Data Bus between.
GU-3616-3 (DISPLAY UNIT)
FLD Driver (GU-3614-3 , IC101)
• [VFD_RST] : "H" level?
N.G.
(1) Check soldering of CY171 on MAIN UNIT.
(2) GU-3616-3 is N.G. (No Good).
O.K.
Continue to next step.
Check the Set-up process of B/E
µ
-COM.
トラブルシューティング
1. GU-3612 MAIN UNIT
1.1. FL 管点灯せず
(1) システム μ-COM 立ち上がりチェック工程
電源電圧確認
GU-3612 (MAIN UNIT)
・ [IC318] : 80, 14
+3.3V̲D1, +3.3V̲NSW
N.G.
半田付けを確認
・ MAIN UNIT の CX141
O.K.
発振波形確認
GU-3612 (MAIN UNIT)
・ [IC318] :
16MHz at 13pin.
N.G.
半田付けを確認
・ MAIN UNIT の X302
O.K.
電源電圧確認
GU-3612(MAIN UNIT)
・ [IC318] :
"H" level at 39pin? "L" level at 7pin and 44pin?
N.G.
半田付けを確認
・ MAIN UNIT の IC318
O.K.
RESET 信号の確認
GU-3612(MAIN UNIT)
・ [IC318] :
"H" level at 10pin?
N.G.
半田付けを確認
・ MAIN UNIT の IC319 (Reset IC)
O.K.
データバスの確認
GU-3616-3 (DISPLAY UNIT)
FLD Driver (GU-3616-3, IC101)]
・ [VFD̲RST] : "H" level?
N.G.
(1) MAIN UNIT の CY171 の半田付けを確認
(2) GU-3616-3 の不良
O.K.
次のステップへ
(2) B/E μ-COM 立ち上げチェック工程へ
Summary of Contents for DVD-2910
Page 29: ...29 DVD 2910 955 BLOCK DIAGRAM ...
Page 48: ...48 DVD 2910 955 CXD2753R IC602 Pin Assignment Block Diagram ...
Page 79: ...79 DVD 2910 955 TA76432FC IC902 PC123 IC909 COLLECTOR EMITTER ANODE CATHODE TOP VIEW ...
Page 81: ...81 DVD 2910 955 PRINTED WIRING BORDS GU 3612 MAIN PWB P W B UNIT ASS Y COMPONENT SIDE ...
Page 82: ...82 DVD 2910 955 GU 3612 MAIN PWB P W B UNIT ASS Y FOIL SIDE ...
Page 83: ...83 DVD 2910 955 GU 3615 VODEO P W B UNIT ASS Y COMPONENT SIDE ...
Page 84: ...84 DVD 2910 955 GU 3615 VODEO P W B UNIT ASS Y FOIL SIDE ...
Page 85: ...85 DVD 2910 955 GU 3616 AUDIO POWER P W B UNIT ASS Y COMPONENT SIDE ...
Page 86: ...86 DVD 2910 955 GU 3616 AUDIO POWER P W B UNIT ASS Y FOIL SIDE ...
Page 117: ...DVD 2910 955 117 GU 3615 1 VIDEO P W B V6 V7 V8 V1 V2 V3 V4 V5 ...