McIntosh C8 - SCHEMATICS Manuel d'utilisateur télécharger pdf (Page 5)

GUARANTEE

We guarantee the performance of this equipment and the mechanical and electrical workmanship to be

free of serious defects for a period of 90 days. This guarantee does not extend to components damaged by im-

proper use nor does it extend to transportation to and from the factory.

SERVICE INFORMATION

All McIntosh equipment

designed for long trouble free operation. All components are of highest

quality and are conservatively operated. If trouble develops the amplifier may be serviced by your franchised

dealer, a competent serviceman, or returned to the factory. Equipment will not be .accepted at the factory

unless factory return authorization is first received. The following chart of operating voltages and resistances

is offered as a guide for servicing the unit. All voltages and resistences are measured to chassis except

those with asterik (*). These are measured to chassis with pin #2 of either 5U4GA grounded. Voltages are

measured with high impedence VTVM. NOTE-UNIT MUST BE TURNED OFF WHEN MEASURING

RESISTENCES.

Tube

12AX7

(input)

12AU7

·12BH7

VOLTAGE AND RESISTANCE CHART

DC Volts

Pin No. No Signal

120

-e-

1.1

Filament

6,7

Filament

240

120

129

Filament

6 240

Filament

352

Filament

352

Filament

DC Volts

30Wout

AC Volts

30Wout

102

1.5

.42

(6.3V AC to pin 9)

210

102

108

(6.3V AC to pin 9)

210

1.5

Resistance

Unit Off

380K*

27K (gain

C.C.W.)

3.3K

-&-(hum

C.C.W.)

40K*

380K*

18K

40K*

2.5K*

295

132

12.2Kx-

-&-

220K

15.5

1.2K

(6.3V AC to pin 9)

295

132 12.2K*

220K

--4-

1 2 3 4 5 6 7 8

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McIntosh C8 - SCHEMATICS Manuel d'utilisateur Page 5

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