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The TEAC A-1500's Service Manual was instrumental in reviving this classic reel-to-reel. Not only does it have the schematics, exploded parts diagram and parts list, it also provided mechanical adjustment information that approximate factory default settings.
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This service manual was determinant to enable to fix my Alpine Amplifier. I am pleased with my purchase. For a 5 star rating I would like to see a higher resolution scan of the printed circuit board lay-out because the gray scale grafics was dificult to see. Also some schematic diagrams were scanned at a slight angle. Never the less, it had all information I needed to troubleshoot and service my equipment.
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Complete manual, the good quality of reproduction allows enlarged print-out of the schematic diagram in the size it probably had in the original print edition and which is necessary for practical use.
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The service manual was complete and the components on the drawings very good visible.
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downloaded next day , manual is very helpful , fast and easy
IC DESCRIPTION IC, LC78622E
Pin No. 1 2 3 4 5 6 7 8 9 10 11
12, 13
Pin Name DEFI TAI PDO Vvss ISET VVDD FR Vss EFMO EFMIN TEST2 CLV+, CLK� VIP HFL TES TOFF TGL JP+, JP� PCK FSEQ VDD
I/o I I o � For PLL. I � I � o I I 0 o I I o o 0 o o
Description Defect sense signal (DEF) input pin. (Connect to OVwhen notused). Testsignalinput pinwithbuilt%pull-dow nresistor. esureto connecttoOV. B
Phase comparator output pin to control external VCO. GNDpinfor built-in VCO. Besureto connect toOV. Pin to which external resistor adjusting the PDO output current. Power supply pin for built-in VCO. Pin for VCO frequency range adjustment. Digital system GND. Besureto connect toOV. For slice leyel control. EFM signal output pin. EFM signal input pin. Test signal input pin with built-in pull-down resistor. Be
sure to connect to OV.
Disc motor control output. Three level output is possible using command. Rough servo or phase control automatic selection monitoring output pin. Rough servo at H. Phase servo at L.
14 15 16 17 18 19,20 21 22 23
Track detect signal input pin. Schmidt input. Tracking error signal input pin. Schmidt input. Tracking OFF output pin. Tracking gain selection output pin. Gain boost at L. Track jump control signal output pin. Three level output is possible using command. EFM data playback clock monitoring pin 4.3218 MHz when phase is locked in. Sync signal detection output pin. H when the sync signal which is detected from EFM signal and thesync signal which is internally generated agree. Digital system power supply pin. The pin is controlled by the serial data command from microprocessor. When
24-28
CONT1-CONT5
I/o
General purpose input/output pin 1 to 5.
the pin is not used, set the pinto the input terminal and connect to OV,or alternately set the pin to output terminal and leave the pin open.
29
30
EMPH
C2F
o
o
De-emphasis monitor output pin. De-emphasis disc is being played back at H.
C2 flag output pin.
31 32,33 34 35 36 37 38
39
DOUT TEST3, TEST4 N.C. MUTEL LVDD LCHO LVSS RVSS RCHO RVDD MUTER
o I
DIGITAL OUT output pin. (EIAJ format). Test signal input pin with built-in pull-down resistor. Be sure to connect to OV. Not used. Set the pin to open.
o � L-channel 1-bit DAC. o �
L-channel mute output pin. L-channel power supply pin. L-channel output pin. L-channel GND. Be sure to connect to OV. R-channel GND. Be
sure to connect to OV.
I
40
o � o
41 42
R-channel l-bit DAC.
R-channel output pin. R-channel power supply pin. R-channel mute output pin.
 $4.99 CSDEL50 AIWA
Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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