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The manual was of good quality with high resolution schematic diagrams.
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The manual was very clear and contained all the information I was looking for. My dishwasher is working again because of this servicemanual!
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Quality scan, great manual. I solved my problem with this manual.
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The AKAI 1720 model reel to reel tape recorder described in this Manual is quite an old unit - circa late 1960's. As a consequence, the description of the mechanical details - and adjustments thereof - is quite critical. The manual does this quite well. The schematics are also well presented and have detailed PCB overlays. Probably the only negative is that some half-tone detail has been lost from the original manual as it has been scanned in simple B&W.
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Perfect source for service manuals: fast and professional transaction; high quality, perfect readable and largely scaleable PDF; complete schemes, diagrams and spare part list. Tnx a lot, cu again!!!!
5
6
7
8
A
IC952 (Pin 14)
Step 6: DIR
Check that the SPDIF signal is output. Check that changes by pulling out and inserting the digital input lines. IC601 (Pin 1) No Replace IC952. Can No Check the DIGITAL INPUT Assy, observe the digital signal and parts and patterns in the path. ? (0 V � 4 V) Yes IC601 (Pin 5) IN2 (OPT: CD-R/TAPE/MD) IN1 (OPT: TV/SAT)
A
Do convert 3 V into 5 V for pin 6 input? Yes IC952 (Pin 13)
Do convert 3 V into 5 V for pin 7 input? Yes To Step 5
No
Replace IC952.
Can No Check the DIGITAL INPUT Assy, observe the digital signal and parts and patterns in the path. ? (0 V � 4 V) Yes IC601 (Pin 44) IN3 (COAX: DVD/LD) No Check the parts and patterns in the path. (1.65 V center, amplitude more than 0.2 Vp-p) IN4 (COAX: CD)
B
Step 5: X'tal
IC802 (Pin 2)
Can observe the digital signal ? Yes No Replace IC802 or X801.
Is there a 24.576 MHz output? Yes IC802 (Pin 7)
IC601 (Pin 42) Can observe the digital signal ? Yes
C
No
Check the parts and patterns in the path.
(1.65 V center, amplitude more than 0.2 Vp-p) Front IN (OPT: VIDEO2)
Is there a 24.576 MHz output? Yes IC802 (Pin 5)
No Check the path to pin 45 of IC801. Replace IC802. IC601 (Pin 7)
Can observe the No Check the FRONT IN Assy, and digital signal parts and patterns in the path. ? (0 V � 4 V) No Check the path to pin 30 of IC601. Replace IC802. Yes Check that the data and clock signals are output.
D
Is there a 24.576 MHz output? Yes
IC601 (Pin 27) To Step 6 Is there a master clock output? Yes
MCKO2 (Master clock) Is the voltage of PDN IC601-pin 31 5 V?
No
No Check the other assy. (surrounding of the microcomputer) No Replace IC601.
(0 V � 3.3 V)
E
IC601 (Pin 24)
LRCK (LR clock)
Is there a LR clock output? Yes
No Replace IC601. (0 V � 3.3 V)
B
F
VSX-1017AV-K
5 6 7 8
33
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