Heathkit AJ 1600 Schematic

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SCHEMATIC or THE 7 m. 9393
HEATHKIT® InIrlsu pARTs MOUNTED ON THE AM CIRCUIT BOARD. THIS SVMRoLINUIcATESACIRCUIT BOARD I @

PLUG CONNECTIONIPIN NUMBER INDICATEDI. |

AM/FM STEREO DIGITAL TUNER ITS-l9? ESELSD-MOUNTED ON THE F'Vl DIVIDER CIRCUIT
MODEL AJ-1600 203-340 PARTS MOUNTED ON THE EM IE CIRCUIT BOARD

THIS SYMBOL INDICATES A CONNECTION TO A
CIRCUIT VOLTAGE SUPPLYI

THTS SYMBOL INDICATES A POWER SUPPLY

3507399 PARTS MOUNTED
401-499 PARTS MOUNTED

500-599 PARTS MOUNTED

ON THE OUTPUT CIRCUIT BOARD,
ON THE DISPLAY CIRCUIT BOARD.

ON THE SWTTCH CTRCUIT BOARD.

VOLTAGE SOURCE,

THIS SYMBOL lNDlCATES A DC VOLTAGE TAKEN
FROM THE POINT TNDICATED WITH A HIGH INPUT
IMPEDANCE VOLTMETER T0 CHASSIS GROUND.

NOTES~ ALSO INDICATES uc VOLTAcEs AT MUTE CIRCUITS
. Tam-m mus MOUNTED oN THE POWER SUPPLY CIRCUIT IN MUTED CONDITION.
BOARD,
1. ALL RESISTORS ARI 1/4 WATT .57- TOLERANCE UNLESS THIS SYMBOL INDICATES Dc VOLTAGES AROUND
OTHERWISE NOTED, lk-IDOD, M-1I000,000). HI PARTS MOUNTED 0N LED CIRCUIT RUARU. E] MUTE CIRCUITRY IN UNMUTEn coNnITION.
2 CAPACITORS LESS THAN I ARE IN IT (MICROFARADSI "o: m AND an AM MOUNTED 0" THE
I ~ [AMP CIRCUIT some.
ALL OTHER CAPACITORS ARE IN pF I PICOFARADSI UNLESS THI'IiISIjIMmII'INImELjION OPERAHNG DC
OTHERWISE NOTED. 4. THE FOLLOWING SYMBOLS ARE HSED ON THE SCHEMATIC. I
** ORDER ONLY DIRECT-REPLACEMENTS, av HEATHKIT
z COMPONENT NUMBERS ARE IN THE FOLLOWING GROUPS: - THIS swam INDICATES A CHASSIS GROUND. PART NUMBER. WMM©IM
Homeow-
I. mm IN IIIE TUNER SEMI 0R MOUNTED THIS swam INDICATES A cIRcUIT BOARD 5. wk THE PHYSICAL LOCATION To COMPONENTS REFER To mum; Mm
M III; CHIS; V GROUND. THE "CIRCUIT BOARD XVRAY VIEWS," STARTING ON PAGE 116. pm of 595.21.17.03 pnmmInmeuI-wsmwmmu

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Page 126

-- _ -HEATHKIT-
SEMICONDUCTOR
IDENTIFICATION
CHARTS
DIODES
COMPONENT HEATH MAY BE IDENTIFICATION
PART NUMBER REPLACED WITH
9202, 0203 56-26 1N191
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0403;33:02, 56-56 1N4I49 / fl /4%?
/
0608 56-64 Macao-24 / / / / / /
(SO-volt)
BAN DEII EN D
1N4744A.
D607 564520 17 mA zener
(15 0207, D601 57-65 IN4002
through D606
D1, 02, I33 412-632 LED