Hitachi V 1150 Service Manual

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CONTENTS

Page
SPECIFICATIONS .........-........ ..... ............. 1
ACCESSORIES . ..... .. ... .. .. ...... .. ..... . 12
PREVENTIVE MAINTENANCE ...... ............. ..... .... 12
CALIBRATION ....... . ..... ........ ..... . ..... ....... 13
4.1 Calibration interval ....... ............ . ..... 13
4.2 Test equipment required ... ........ ...... ..... 13
4.3 Preliminary procedure ..... ...... . ...... . ..... 14
4.4 Preliminary control settings .. ............... 16
4.5 Initial starting procedure ...... . ...... ...... 16
TEST AND EXERCISER ..... . ...... . ............ .. ..... 36
DETAILED CIRCUIT DESCRIPTION ...... ..... .. ....... .. 40
6.1 <:> CH1, 2 PREAMP ....... ..... ............. 41
6.2 <:> CH3, CH4 PREAMP ... ....... .. ...... ..... 47
6.3 <:> VERTICAL SWITCHING .. ..... . ...... ....-. 51
6.4 <:> VERTICAL OUTPUT AMP
& GND REFERENCE ...... .. ..... ... ..... .. 55
6.5 <:> A&B TRIG SELECTOR ..... .. ....... . ...... 61
6.6 <:> A/B TRIG GENERATOR .... ...... .. ..... ... 71
6.7 <:> A/B SWEEP GENERATOR ..... ... ........ ..- 80
6.8 HORIZONTAL OUTPUT AMP . . . . ...... . . ..... 87
6.9 <:> Z-AXIS AMP & CRT CONTROL ..... ...... ... 91
6.10 <:> POWER SUPPLY ....... . ..... .. ...... ..... 97

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CH2 TRIG LEVEL CENT
Move the signal to CH2.

Change the VERT MODE switch to CH2 and A TRIGGER SOURCE to
CH2.

Adjust RV304 so that the trigger is effected on the point A
of the waveform.

CH3 TRlG LEVEL CENT

Move the signal to CH3.

Set the VERT MODE switch to CH3.
Change the A TRIGGER SOURCE to CH3.

Set the 0.1 V/DlV, 0.5 V/DIV switch to the 0.1 V/DIV position
for CH3.

Set the generator to 2 divisions display.

Adjust RV417 so that the trigger is effected 0n the point A
of the waveform.

CH4 TRIG LEVEL CENT
Move the signal to CH4.

Change the A TRIG SOURCE switch to CH4, and push both the
QUAD and ALT buttons of VERT MODE.

Set the 0.1 V/DlV, 0.5 V/DlV switch to the 0.1 V/DIV position
for CH4.

Adjust RV517 so that the trigger is effected on the point A
of the waveform.

B TRIG LEVEL CENT

Set:

VERT MODE .................... CH1

VOLTS/DIV .............. . ..... 10 mV/DIV

A TIME/DIV ................... 20 Us/DIV

B TIME/DIV ................... 5 us/DIV

A and B triggering ........... SOURCE : CH1
COUPLING: AC
B MODE : NORM
SLOPE : +

Horizontal display mode . ..... INTEN

A and B TRIG LEVEL ........... Midposition

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