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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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This was the Sony CCU-500A Service manual I was looking for.
The price was reasonable.
The permission to download was quck.
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Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
A+++++++++++++++++++++++++
5 Troubleshooting
5-2 No Video (PC Signal)
Power indicator is green.
Does the signal appear at R110, R111, C106, C107 and C108? Yes
No Check CN100, R106, R107 and R108.
Does the clock pulse appear at X200, X201?
No
Check related circuit of X200, X201.
Yes
Does the clock pulse appear at output of R234, R236, R240?
No
Check related circuit of IC201.
Yes
Does the clock pulse appear at of R257~R266, R272~R281? Yes
No Check IC202 and related circuit of IC202.
Replace LCD panel.
5-2
MH15NS/MH17NS
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