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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!!!!
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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
DVR-7000
4.2 MAIN ASSY ADJUSTMENT
Note : Use disc : [ PAL DVD test disc ] No.
1
It is recommended to adjust using PAL Disc. Adjustment Value
27.000000MHZ ± 130Hz
Adjustment Name
Master clock free-running adjustment (Clock system adjustment)
Adj. Point Measurement Point
VC3001 MAIN ASSY IC4007 Pin54 (CLKO) (M65774AFP) Y output of S terminal (75� termination)
Adjustment State
No input signal or during test disc playback Playback the PAL DVD test disc(100% color-bar). Terminate the Y output of S terminal with 75� and adjust so that the level of between sync tip and white peak becomes 1.0Vp-p. Playback the PAL DVD test disc(100%colorbar). Terminate the C output of S terminal with 75� and adjust so that the amplitude of color burst becomes 300mVp-p. Playback the PAL DVD test disc(100% color-bar). At the pin 11 of CN7001 in the MAIN ASSY, adjust so that the level of between sync tip and white peak becomes 760mVp-p. Playback the PAL DVD test disc(100%colorbar). At the pin 13 of CN7001 in the MAIN ASSY, adjust so that the level of between bottom and top becomes 520mVp-p in the 100% color-bar screen. Playback the PAL DVD test disc(100%colorbar). At the pin 15 of CN7001 in the MAIN ASSY, adjust so that the level of between bottom and top becomes 520mVp-p in the 100% color-bar screen.
2
Y level adjustment of CVBS system (Output system adjustment)
VR7002
1.0Vp-p ± 40mV
3
C level adjustment of CVBS system (Output system adjustment)
VR7001
C output of S terminal (75� termination)
300mVp-p ± 12mV
4
Y level adjustment of component system (Output system adjustment)
VR7003
MAIN ASSY CN7001 Pin11 (Y(G) Out)
760mVp-p ± 22mV
5
PB level adjustment of component system (Output system adjustment)
VR7004
MAIN ASSY CN7001 Pin13 (PB(B) Out)
520mVp-p ± 15mV
6
PR level adjustment of component system (Output system adjustment)
VR7005
MAIN ASSY CN7001 Pin15 (PR(R) Out)
520mVp-p ± 15mV
When NTSC test disc GGV1025 is used, the adjustment No.2 to No.6 value is changed to the following value. No.
2
Adjustment Name
Y level adjustment of CVBS system (Output system adjustment)
Adj. Point Measurement Point
VR7002 Y output of S terminal (75� termination)
Adjustment Value
980mVp-p ± 39mV
Adjustment State
Playback the NTSC DVD test disc (75% color-bar). Terminate the Y output of S terminal with 75� and adjust so that the level of between sync tip and white peak becomes 980mVp-p.
3
C level adjustment of CVBS system (Output system adjustment)
VR7001
C output of S terminal (75� termination)
280mVp-p ± 11mV
Playback the NTSC DVD test disc(75%colorbar).Terminate the C output of S terminal with 75� and adjust so that the amplitude of color burst becomes 280mVp-p. Playback the NTSC DVD test disc (75% color-bar). At the pin 11 of CN7001 in the MAIN ASSY, adjust so that the level of between sync tip and white peak becomes 745mVp-p. Playback the NTSC DVD test disc(75%colorbar). At the pin 13 of CN7001 in the MAIN ASSY, adjust so that the level of between bottom and top becomes 390mVp-p in the 75% color-bar screen. Playback the NTSC DVD test disc (75% color- bar). At the pin 15 of CN7001 in the MAIN ASSY, adjust so that the level of between bottom and top becomes 390mVp-p in the 75% color-bar screen.
4
Y level adjustment of component system (Output system adjustment)
VR7003
MAIN ASSY CN7001 Pin11 (Y(G) Out)
745mVp-p ± 22mV
5
PB level adjustment of component system (Output system adjustment)
VR7004
MAIN ASSY CN7001 Pin13 (PB(B) Out)
390mVp-p ± 12mV
6
PR level adjustment of component system (Output system adjustment)
VR7005
MAIN ASSY CN7001 Pin15 (PR(R) Out)
390mVp-p ± 12mV
Note : Do the MAIN ASSY adjustment first, before TUMJ ASSY adjustment. When using 75% color bar, adjust making PB/PR output to 75%.
45
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