Pioneer AVX-P7300DVD, Service Manual

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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 Rated Rated Reference
location 1 location 2 value 1 value 2 waveform
1 AOUT0 IC1601 pin-3 For 2.2V 0.8V Waveform 3
CXK6113, include also and over and lower
CN1701 pin-37
2 SRCKAV IC1601 pin-2 For 2.2V 0.8V Waveform 3
CXK6113, include also and over and lower
CN1701 pin-38
4 LRCKAV IC1701 pin-4 2.2V 0.8V Waveform 3
CXK6113, include also and over and lower
CN1701 pin-36
Rated value1
Rated value 2 GND
Figure 7: Three serial output rated values
Checks are conducted with the measurement circuit below.
NO. Verification Verification Rated value Reference
location 1 location 2 waveform
4 LO CN1701 15pin 1120
±
150mV Waveform 4
5 RO CN1702 12pin 1120
±
150mV Waveform 4
Figure 8: Analog audio outputs (LO and RO) rated values
Figure 9: LO and RO output measurement circuit
NO. Verification Verification Rated value 1 Rated value 2 Reference
location 1 location 2 waveform
6 IEC958 CN1702 2pin 2.2V and over 0.8V and lower Waveform 5
Rated value
22k
AAGND
HOST I/F
RO
LO
Q1602.3
Peripheral
muting
circuit
These resistors are inserted.