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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.
KDC-2022/V/202MR/4023
MICROCOMPUTER'S TERMINAL DESCRIPTION
q MECHANISM MICROCOMPUTER MN6627771KP (X32 : IC2)
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 Name TVD SPL PC PWM TBAL FBAL NRFDET OFT BDO LDON DSLB DVDD1 DVSS1 AVSS2 DSLF ARF RFSW PLLF PLLF2 IREF RFENV TRCRS TE FE AVDD2 AVSS1 OUTR AVDD1 OUTL DVSS3 CSEL NC ASEL MSEL0 MSEL1 ICRST BCLK LRCK SRDATA VREFP HOT 8EJE_SW 12EJE/SDET_SW LOE/LIM_SW PCK EFM SENSE CLVS DEMPH DVDD2 X1 I/O O O O O O O I I I O O I/O I I I/O I/O I I I I I O O I O I I I O O O O I I I I I O O O O O I Description Traverse driver output (PWM output) Spindle motor drive output (PWM output) Spindle motor ON output multi-purpose PWM output Tracking balance adjust output (PWM output) Focus balance adjust output (PWM output) RF detection signal input Off-track signal input Drop out signal input Laser on signal output H:ON DSL balance output Power supply for digital circuit Ground lines for digital circuit Ground lines for analog circuit Loop filter terminal for DSL RF signal input When DSL circuit,constant switch terminal Loop filter terminal for PLL Loop filter characteristic switching terminal for PLL Standard voltage input terminal RF envelope signal input Track cross signal input Tracking error signal input Focusing error signal input Power supply for analog circuit Ground lines for analog circuit Rch audio output Power supply for analog circuit Lch audio output Ground lines for digital circuit Oscillation frequency specification terminal Not used Audio output polarity switching terminal Destination type selection port (set 2bit) Destination type selection port (set 2bit) Reset control terminal for external DAC Bit clock output for serial data L/R identification signal output Sirial data output A/D converter standard power supply input Temperature protection detection terminal (AD input) 8cm disc eject stop detection terminal Judge the 8cm or 12cm disc Pick-up inside detected PLL extracted clock output,etc EFM signal output,etc Optics servo status signal output,etc Spindle servo phase synchronous signal output,etc Dephase detection signal output,etc Power supply for digital circuit Main clock input terminal Processing Operation
L:ON H:OFF (default ) It's possible to setup the TOSF2
L:detected H:detected H:detected When command FO on,LDON is H
For DSL,PLL and AD The bias of ARF output terminal in one
Analog input Analog input Analog input Analog input For DSL,PLL and AD For audio output (Lch and Rch in one) For audio output (Lch and Rch in one)
H:33.8488MHz L:16.9344MHz L:Reverse H:Non reverse Order "MSEL 0" and "MSEL 1" Set up Order "MSEL 0" and "MSEL 1" Set up
Over C5(h):on H:Stop 12cm disc stop detection terminal Loading end detection terminal
L:Normal operation H:Luff servo H:on
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