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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!!!!
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I got your link from a friend and I must say that I am really satisfied with your service. Specially this B&O manual I didn't find anywhere on the web... but you could deliver it :-) . You deliver very fast and the copy is of good quality. So your webpage is bookmarked. Thanks
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This was the Sony CCU-500A Service manual I was looking for.
The price was reasonable.
The permission to download was quck.
I will use Owner-Manual.com for all my manual needs.
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Step 6: DIR A
A
Check that the S/PDIF signal is output. Check that changes by pulling out and inserting the digital input lines. IC601 (pin 1) IN1 (OPT: TV/SAT)
IC952 (pin 14) 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 5) IN2 (OPT: CD-R/TAPE/MD)
B
No
Replace IC952.
Can observe the No Check the DIGITAL INPUT Assy, digital signal and parts and patterns in the path. ? (0 V <-> 4 V) Yes IC601 (pin 44) Can observe the digital signal ? Yes IN3 (COAX: DVD/LD)
Step 5: X'tal
IC802 (pin 2)
C
No
Check the parts and patterns in the path.
(1.65 V center, amplitude more than 0.2 Vp-p) IN4 (COAX: CD)
Is there a 24.576 MHz output? Yes IC802 (pin 7)
No Replace IC802 or X801.
IC601 (pin 42)
Can observe the No Check the parts and patterns digital signal in the path. ? (1.65 V center, amplitude more than 0.2 Vp-p) Yes No Check the path to pin 45 of IC801. Replace IC802. IC601 (pin 27) Is there a master clock output? No Check the path to pin 30 of IC601. Replace IC802. MCKO2 (Master clock) Check that the data and clock signals are output.
Is there a 24.576 MHz output? Yes
D
IC802 (pin 5)
Is there a 24.576 MHz output? Yes To Step 6
Is the No voltage of PDN IC601-pin 31 5 V? (0 V <-> 3.3 V) Check the other assy. (surrounding of the Yes microcomputer) No No Replace IC601.
IC601 (pin 24)
LRCK (LR clock)
E
Is there a LR clock output? Yes
No Replace IC601. (0 V <-> 3.3 V)
B
F
20
1 2
VSX-518-K
3 4
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