No Sound,Noise Generated - Denon DVD-2910 Service Manual

1.4. No Sound,Noise generated

(1) CD, DVD-VIDEO/AUDIO
Check PCM Digital Audio Data (VSTEM
data) and VSTEM communication.
GU-3612 (MAIN UNIT)
• [IC601] output / [IC101] (ES6138) input :
[BD0-7], [BSDCLK], [SHAK], [BDEF], [BSHD],
[BSREQ]
O.K.
Check PCM Digital Audio Data output. [1]
GU-3612 (MAIN UNIT)
• [IC101] output :
[TSD0], [TSD1], [TSD2], [TSD3], [TBCK],
[TWS], [PMCK]
O.K.
Check PCM Digital Audio Data output. [2]
GU-3612 (MAIN UNIT)
(1) Audio selector (SN74LVC157) output
/Audio DSP input:
• [PFLR], [PSLR], [PCSW], [PMLR], [PBCK],
[64fs1], [fs1], [PMK]
(2) [IC304, IC305, IC306] : 1pin(DSD_SEL) "L"?
O.K.
Check Audio DSP [IC311] (ADSP-21266)
GU-3612 (MAIN UNIT)
(1) Power Supply Voltages.
+3.3V_DSP, DSP1.8V
(2) Clock waveform.
142pin : 18.75MHz O.K.?
(3) Reset signal.
[DSPRST] (121pin) : "H"?
(4) Control signal
[DSPSPICS] (122pin), [DSPSPICLK]
(125pin), [DSPMISO] (126pin), [DSPMOSI]
(127pin) [FLAG0] (15pin)
O.K.
Check PCM Digital Audio Data output. [3]
GU-3612 (MAIN UNIT)
(1) Audio DSP (ADSP-21266) output:
• [PFLR], [PSLR], [PCSW],
[TSD3_DSP_OUT], [DFR_OUT]
(2) Audio Selector input/output:
• input : [TSD3_DSP_OUT], [PFLR],
[DFR_OUT]
• output : [PMLR], [FRONT_O], [DFR_OUT].
(3) [IC313] : 1pin "L"?
O.K.
Check PCM Digital Audio Data output. [4]
GU-3612 (MAIN UNIT)
• [CX271] :
[FRONT_O], [PSLR], [PCSW], [PMLR],
[PBCK], [PLRCK], [PMK]
O.K.
Continue to the check process of
GU-3616-1 AUDIO UNIT.
Check Soldering.
N.G.
• [IC601] : 75-98pin
• [IC101] : 122-128, 131, 132, 142, 144, 149,
150pin
Check Soldering.
• [IC101] : 33, 36, 37, 40, 32pin
N.G.
• R124-R129
• [IC114] (SN74LV74), [IC115] (CY2302)
• R139, R140
• Check the circumference soldering of [IC304],
[IC305] and [IC306].
N.G.
• Check Soldering.
[IC311]:94, 88, 89, 87, 79, 78, 77, 71,
R389-R391, R397-R399, R388
(1) Check the circumference soldering of
[TR301], [TR302] and [IC312].
(2) Check the circumference soldering of
N.G.
[X301].
(3) Check Soldering.
[IC318] : 55pin, R411
(4) Check Soldering.
[IC318] : 1, 100, 98, 99, 58pin, R460
(1) Check Soldering.
[IC311] : 80-82, 86, 57, R394-R396, R370
N.G.
(2) Check the circumference soldering of
[IC306], and [IC313]
• Check Soldering.
[CX271] : 7-12, 14, 16, 18, 19
R493-R502
1.4. 音声出力せず、ノイズ発生
(1) CD, DVD-VIDEO/AUDIO
PCM デジタルオーディオデータ /VSTEM 通
信確認
GU-3612 (MAIN UNIT)
･ [IC601] 出力 / [IC101] (ES6138) 入力 :
[BD0-7], [BSDCLK], [SHAK], [BSDEF], [BSHD],
[BSREQ]
O.K.
PCM デジタルオーディオデータ確認 [1]
GU-3612 (MAIN UNIT)
･ [IC101] 出力 :
[TSD0], [TSD1], [TSD2], [TSD3], [TBCK], [TWS],
[PMCK]
O.K.
PCM デジタルオーディオデータ確認 [2]
GU-3612 (MAIN UNIT)
(1) オーディオセレクタ (SN74LVC157) 出力
/ オーディオ DSP 入力
･ [PFLR], [PSLR], [PCSW], [PMLR], [PBCK],
[64fs1], [fs1], [PMK]
(2) [IC304, IC305, IC306] : 1pin (DSD_SEL) "L"?
O.K.
オーディオ DSP の確認
GU-3612 (MAIN UNIT)
(1) 電源電圧
+3.3V_DSP, DSP1.8V
(2) クロック波形
142pin : 18.75MHz O.K.?
(3) RESET 信号
[DSPRST] (121pin) : "H"?
(4) 制御信号
[DSPSPICS] (122pin), [DSPSPICLK] (125pin),
[DSPMISO] (126pin), [DSPMOSI] (127pin)
[FLAG0] (15pin)
O.K.
PCM デジタルオーディオデータ確認 [3]
GU-3612 (MAIN UNIT)
(1) オーディオ DSP (ADSP-21266) 出力 :
･ [PFLR], [PSLR], [PCSW], [TSD3_DSP_OUT],
[DFR_OUT]
(2) オーディオセレクタ入出力
･ 入力 : [TSD3_DSP_OUT], [PFLR], [DFR_OUT]
･ 出力 : [PMLR], [FRONT_O], [DFR_OUT]
(3) [IC313] : 1pin "L"?
O.K.
PCM デジタルオーディオデータ確認 [4]
GU-3612 (MAIN UNIT)
･ [CX271] :
[FRONT_O], [PSLSR], [PCSW], [PMLR], [PBCK],
[PLRCK], [PPMK]
O.K.
GU-3616-1 AUDIO UNIT のチェック工程へ
21
DVD-2910/955
半田付けを確認
･ [IC601] : 75-98pin
N.G.
･ R619-R625, R628-R633
･ [IC101] : 122-128, 131, 132, 142, 144, 149,
150pin
半田付けを確認
･ [IC101] : 33, 36, 37, 40, 32pin
N.G.
･ R124-R129
･ [IC114] (SN74LV74) ,[IC115] (CY2302)
･ R139, R140
･ [IC304]-[IC306] とその周辺回路の半田付けを確認
N.G.
･ 半田付けを確認
[IC311] : 94, 88, 89, 87, 79, 78, 77, 71,
R389-R391, R397-R399, R388
(1) [TR301], [TR302], [IC312] とその周辺回路の
半田付けを確認
(2) [X301] とその周辺回路の半田付けを確認
N.G.
(3) 半田付けを確認
[IC318] : 55pin, R411
(4) 半田付けを確認
[IC318] : 1, 100, 98, 99, 58pin, R460
(1) 半田付けを確認
N.G.
[IC311] : 80-82, 86, 57, R394-R396, R370
(2) [IC306], [IC313] とその周辺回路の半田付けを
確認
･ 半田付けを確認
[CX271] : 7-12, 14, 16, 18, 19
R493-R502