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There are currently no product reviews.
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The manual was of good quality with high resolution schematic diagrams.
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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!!!!
Technical Manual
4428
EXPLODED VIEW
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4428 Cabinet � Not for sale
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ITEM NO. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17.
DESCRIPTION QTY. Horn, HF/UHF, Pntd-4428 1 Network, HF/UHF, W/L-Pad-4428 1 Asy, Wfr-1200FE-8 1 Asy, Tweeter, XDCR-175ND-2 1 PTB, Crdbd, 2.5x4.75, 1/16THK-4425MKII 2 Cup, Grl-Hls/Studio II Ser 4 Cup, Term-4428 1 Gskt, Drv, 12"-PMTS 1 Network, LF-4428 1 Asy, Twtr-UHF-015M 1 Horn, HF, Rear, Pntd-4348 1 Nameplate-4428 1 Gskt, Horn, Throat, HF-4348 1 Grl, Frnt, Cab-4428 1 Gskt, UHF, Chipbd-4428 1 Gskt, Horn-4428 1 Screw (woofer to enclosure) 8 10-32 X 1-1/2, FIL, PH, BLK ZINC, LCS 18. Screw (UHF/horn) 4 6-32 X 3/8, BTN, HEX, NO FIN, SS
PART NO. 351489-001 351410-001 339200-002 339811-001 47909-55 333249-001 351441-001 335481-001 351410-002 351265-001 339092-001 351491-001 339702-001 351440-001 351858-001 351359-001 804-01110-24 802-93056-06
ITEM NO. DESCRIPTION QTY. 19. Screw (T Cup/HF Ntwk/Tie Wrap) 9 #6 X 3/4, OVHDPH 20. Screw (horn/cab) 6 10-32 X 1-1/4, SOC CAP, BLK ZINC, ALLOY 21. Screw (horn-frnt to rear) 2 10-32 X 1-1/4, PAN, PH, BLK ZINC, LCS 22. Screw (l-pad/cab) 3 8-32 X 2", FLT, PH, CLR ZINC, LCS 23. Bolt (drvr/rear horn) 4 1/4-20 X 3/4, CAP, CLR ZINC, MCS 24. Washer (horn/cab) #10, Type A, ZINC PL 24 25. Screw (LF ntwk) 6 8-32 X 1, PAN, PH, PB, BLK ZINC, LCS 26. Level Control (L-Pad) Label 1 27. Outer Carton 1 28. Top-Bottom Pads 2 29. Shorting Straps (set R-L) 1
PART NO. 61867 874-33114-20 804-41110-20 803-11010-32 854-03001-12 843-00100-05 883-41110-16 351442-001 351490-001 351443-001 CS06-6
TO SERVICE THE 4428:
Remove the woofer; crossover network(s) and all drivers must be accessed through the woofer opening in the cabinet. If L-Pad removal is necessary, the three screws for removal are located beneath the Level Control label. If the label cannot be salvaged after removal, order part# 351442-001.
JBL Consumer Products, 250 Crossways Park Drive, Woodbury, New York 11797 Rev1 9/2003
4428
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