Akai GX 270 D Service Manual

Page 2

STEREO TAPE DECK

MODEL GX- 270D

SECTION I SERVICE MANUAL ............................. 3
SECTION 2 PARTS LIST ................................... 27
SECTION 3 SCHEMATIC DIAGRAM .......................... 48

Page 18

AUD l 0
FREQUENCY ATTENUATOR
OSCl LLATOR 9
ourwr
., Li, a

VRI lOKB
(LEFT ch. )

O

HlGH
SENSlTlUlTV AC.
XOLT METER

m LINE FROM LlNE
mpur ourput imp,
-c

VRZ IOKE
(RIGHT ch. )

O

4. PEAK LEVEL INDICATOR LIGHTING

LEVEL ADJUSTMENT (Refer to Fig. 14)

1) Connect measuring instruments as shown in Fig. 14
above.

2) Set Output Volume to maximum (turn fully clock-
wise)

3) Set Monitor Switch to SOURCE.

4) Set Line Controls to 12 oclock position.

5) Supply a 1,000 Hz sine wave signal from the Audio
Frequency Oscillator and adjust Peak Level P.C.
Board semi-fixed resistor so that the Level Indica-
tor larnp lights when the High Sensitivity A.C,
Voltmeter indication reaches 8 dBm.

VRl 10 kB: Left channel
VRZ 10 kB: Right channel
* Peak level indicator lighting level specification
is 8 t 1 dBm.
NOTE: Because left-right channel adjustment semi-
fixed resistors are separate, adjust respective
channels accordingly.

Fig. 14

I7