Denon PMA-1600NE Service Manual page 50

MEASURING METHOD AND WAVEFORMS
1. DIGITAL PCB test point
It is recommended to use extension wires between the probe and test points.
1. DIGITAL PCB test point
To check waveforms for the board, connect the GND (-) probe of the oscilloscope to the "Vref" point.
• For points q to Q5 , take measurements at the points shown in the diagram below.
C333 R168 R167 C173
C334 C535
Q144
C536 R184
C335 C158
3 4 1 2 5
C537 C591
B201
G
VCC Q141 Q145
R299
R301 C136
OUT
D591 C143
L592
U951 R156
Q591 Q113
L594 Q108
C217
R592 C717
C215
C214
Q702 C213
L202
C720
C722 R143
C219
C211
R726
C713 N1111
C711 R739
1
19
R743 R745
A C208
R747
Q704
R741 C209
R719 R746
D703 R164
R720
R163
C207
D702
C703
C707 R711 R718
D701
R722 C204
C714
R775
R774
C710 U104
R756
C206
W U701 R755
C718 C708
C705
C524 C156
R717
C157
C716
R723
R530 D502 L702
R524 R518 N460
L703 R278
R526 C515 R276
C376
C377 C378
L203
C203
D501 Q201
K501 C517 U201
6
VCC
R523 C510 C201
U501
R522 C507 R513 C162
7 C505 R502 C509
R517 C216
C124
C503 R514 C202 C111
R515
8
K504
R516
9 C502 N1010
C501 R532
C521 C115
R503 C526
C527
C528
C529
K503
C530
DIGITAL PCB : Aside
[R736] : LRCK/DBACK [R517] : MCK
q y
[R735] : PBCK [R514] : BCK
w u
[R737] : PDATA/DSDL [R515] : LRCK
e i
[R750] : MCK [R516] : DATA
r o
[R738] : DSDR [R294] : DATAL
t Q0
Voltage Reference
63301021920AD
C102
C103
D202
C104
8U-310219
C105
D106 D105 C358
DIGITAL UNIT C106
2
Q121 R147
D104
D203
R140 C256 C230 C257
C258
C132
Q120
U103
C135
R192 R224
X101
R254
R230
C147 R255
C146
C145 U202 C260
U102 R231 C325
C263 C326
R132
C266
R131 R205 R256
R130 R219 R240
R166 R129 R257
R271 R246
R128
R165 R272
R127
R245 C327
R126
R282
R125
R124 R284
R123
R223 R285
R122
R222 R286
R121
R221
R283
R217 C329
R287
R120 R214 R274
R119 R215
N1041 N1051
R118 R216
R117
C331
C130
R273
C308
R188 C309
C310
R267
C311 R270 U208
U207
R268 R280
R263
U206
C319 R258
R264
C322 R266 R281
C318
U205 C320
R250 C323
R252
N1061 R110
Q107 R115
C314
R107
C125
R195 C312
R906
R904
R196
C170 D103
Q135 Q136 R237 Q103
R153 Q138 R102 N1020 R101 N1210
N710
1 7
[R295] : DATAR
Q1
[R293] : WCK/DSDR
Q2
[R292] : DSDL
Q3
[R290] : PBCK
Q4
[R291] : DBCK
Q5
USB-B (PCM) playback
q R736
LRCK
w R735
PBCK
C356
C357
C359
C360
C361 B101 e R737
C362
PDATA
C363
C364
C336
C365
R241
14
r R750
U209
C328
U210 MCK
15
R290
R291
C330 13
R292
12
R293
C332
R294 10
R295
Coaxial/Optical IN playback
11
R288
R289
C324
R113
R155
R108
R114
Q106
i R515
LRCK
u R514
BCK
o R516
DATA
y R517
MCK
DAC INPUT (DSD)
q R736
Unnecessary confirmation
Q5 R291
DBCK
Q3 R262
DSDL
Q2 R293
DSDR
50
USB-B (DSD) playback
q R736
Unnecessary confirmation
q R736
DBCK
e R737
DSDL
t R738
DSDR
DAC INPUT (PCM)
Q2 R293
WCK
Q4 R290
PBCK
Q0 R294
DATAL
Q1 R295
DATAR