Pioneer AVX-P7300DVD Service Manual page 92

AVX-P7300DVD
Check 4: Is the audio circuit operating normally?
Reproduce DVD-REF-A1 Title 2 Chapter (48V/16-bit/1 kHz/0dB). Verify the circuit described in Figure 2.
This check is the same for all DVD-V compatible modules.
Checks are to be conducted using GNDAU1 (sensing pins) as a reference.
If the locations, listed under "verification location 2", can be verified, there is no need to conduct verifications for the
locations listed under "verification location 1."
If the result is not satisfactory, check to see if there are any problems with the resin flux cored solder, parts and
components, in the vicinity of the main components (the section marked 4 in the circuit diagram circuit diagram).
NO. Verification Verification
location 1 location 2
1 AOUT0 IC1601 pin-3 For
CXK6113, include also
CN1701 pin-37
2 SRCKAV IC1601 pin-2 For
CXK6113, include also
CN1701 pin-38
4 LRCKAV IC1701 pin-4
CXK6113, include also
CN1701 pin-36
Rated value1
GND
Figure 7: Three serial output rated values
Checks are conducted with the measurement circuit below.
NO. Verification Verification
location 1 location 2
4 LO CN1701 15pin
5 RO CN1702 12pin
Figure 8: Analog audio outputs (LO and RO) rated values
Q1602.3 LO
Peripheral
muting
RO
circuit
22k
AAGND
Figure 9: LO and RO output measurement circuit
NO. Verification Verification
location 1 location 2
6 IEC958 CN1702 2pin
92
Rated
value 1
2.2V
and over
2.2V
and over
2.2V
and over
Rated value 2
Rated value
1120±150mV
1120±150mV
Rated value
HOST I/F
These resistors are inserted.
Rated value 1
2.2V and over
Rated Reference
value 2 waveform
0.8V Waveform 3
and lower
0.8V Waveform 3
and lower
0.8V Waveform 3
and lower
Reference
waveform
Waveform 4
Waveform 4
Rated value 2 Reference
waveform
0.8V and lower Waveform 5