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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
21HF2-SS
2. PURITY ADJUSTMENT
No. 1 Adjustment point PURITY ADJ. Adjustment condition/procedure 1. Receive the GREEN-ONLY signal. Adjust the beam current to ~700 μA. 2. Degauss the CRT enough with the degausing coil. NOTE: Follow the Job Instruction Sheet to adjust the magnetic field. (Reference: page 3-12) 3. Maintain the purity magnet at the zero magnetic field and keep the static convergence roughly adjusted.. 4. Observe the points a, b as shown in Fig. 1-1 through the micro scope. Adjust the landings to the A rank requirement. 5. Orient the raster rotation to 0 eastward.. 6. Tighten up the deflection coil screws . �Tightening torque: 108 20 N (11 ± 2 kgf) 7. Make sure the CRT corners landing meet the A rank require ments. If not, stick the magnet sheet to correct it. NOTE: Note: This adjustment must be done after warming up the unit for 30 minutes or longer with a beam current over 700 μA. NOTE: Note: Set the service mode by JA304 & JA307 (short) then press factory process R/C RGB key to change to RGB mono colour mode. * For the following colours press R/C RGB(Hex 7E) key to change. Waveform or others
a
b
30mm
F ig. 1-1
30mm
A
B A=B
F ig. 1-2 R ank "A" (on the right of the C R T )
GR E E N ONLY
B LUE ONLY S ignal-colour s creen cleared
RED ONLY
A
B A=B
F ig. 1-3
R ank "A" (on the left of the C R T )
*Press R/C RGB key for 1 second in NORMAL MODE, the colour will change to RGB mono colour mode.
3 � 14
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