Western Electric Co. WRL-493 Schematic

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Product Information:
Model:WRL-493
Manufacturer:Western Electric Co.

Schematics Content:

Please note: this content is a computer-generated interpretation of the above schematic and is provided only to help assist you in locating this schematic. For the actual text, please consult the schematic above. Thank you.

Page 1:

'WESTINGHOUSE ELEC. INTERNATIONAL CO.

Wiring Diagram

Guam r. Rider

Page 2:

wEs'r. INT. PAGE 18-3.;

WESTINGHOUSE ELEC. INTERNATIONAL CO. m493, IRL-498D

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(C)Jolm I. Rider

Page 3:

INTERNATIONAL Co,

MODELS NRL-295, WRL-ZSSB,

PAGE 14-34 WEST. INT.

WESTINGHOUSE ELEC

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\\ (C)John F. Rider

Page 4:

MODELS WRL-295, WHL-295B,

wEsT. INT. PAGE 14-35
WESTINGHOUSE ELEC. INTERNATIONAL CO. WHL-493. WHL-4955

_Suhr Sn ea and

Rider

Page 5:

PAGE 14-36 WEST. INT.

Adjusting Landing Position of Needle on
Record .
If needle comes down too far from the edge of
the record so that record does not start at the
beginning, turn adjustln' g screw "A" very slight-
If needle comes down too close to the edge of
the record so that it slips off, turn adjusting
screw clockwise.
B. Adjustm' g Tripping Mechanism

If tri mechanism fails to trip or operates dur-
ing p aying of record, adjust screw "B" to posi-
tion where proper tripping is obtained.

PICKUP

Take all readings With receiver operating and
tuned to approximatel 1000 Kc.-no signal.
Use a line voltage of 1y20 volts, or make allow-
ance for any slight variation.

Use a good high resistance voltmeter having a
resistance of at least 1000 ohms per volt.

NORMAL VOLTAGE READINGS

WESTINGHOUSE ELEC. INTERNATIONAL C0.

INSTRUCTIONS FOR ADIUS'I'ING PHONOGRAPH MECHANISM
USED IN WHL-493 RECEIVER

c. Adjusting Height to Which Pick-up Arm
Rises

The arm should rise during the change cycle so

that it clears the record above it by onl VS". To
make this adjustment, loosen the loc nut "C"

on pick-11 sleeve and turn sleeve to lengthen or

shorten tge plunger. Be sure to tighten locknut

again after adjustment.

No adjustment of the record separating knives

is required as they are arranged to compensate

for slight ditferences in record thickness auto-,

Handle the mechanism with care.

Do not lift .it by the record holding knives.

W ADJUSTING
SCREW B

SCREW A

Take all D. C. readings on the 500 volt scale ex-
cept when an asterisk appears.

Read from indicated terminals to chassis base.
See location chart on Page 3 for position of ter-

A. C. voltages are indicated by italics. v

TERMINALS 0F 800K ETS

Tube Gift/'Kit 1 ' 2 3 4 5

GSA7 Mod. and Osc. 0 6.0 +270 +100 _4' 0 0 0

SSC 7 Audio Ampl. 0 0 0 0 0 +60 0 6.0

BSC 7 Inverter 0 0 0 0 0 +70 6.0 0

6VGGT (both) Output 0 0 +315 +270 0 0 8.0 +15*

801' Rectifier +390 380 380 +390 __ _ __ _

6U5 Tuning Ind. 6.0 +25 0 +270 0 0 _ _-
- Speaker Socket +330 0 0 +380 +390 0 +380 --

* Read on lowest possible scale of voltmeter.

(C)Jonn 1'. Rider

'l' Between terminals 1 and 4 of rectifier socket: 5 volts A. C.

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