Kenwood SM 220 Service Manual

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\KENWOOD

SERVICE

STATION MONITOR

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SAFETY NOTTCE

The following explicit definitions apply in this manual

NOTE ................ If disregarded. inconvenience only-no risk of equipment
damage of personal injury.

CAUTION ............. Equipment damage may occur. but not personal injury.

WARNING .. . Personal inlury may occur-DO NOT DISREGARD!

WARNING

HIGH VOLTAGES PRESENT

Observe all standard safety procedures regarding high RF. AC. and DC potentials.

HIGH VACUUM CRT

The CRT (cathode ray tube) contained in this instrument is a high vaccu me device. breakage
of which may cause high velocity scattering of glass particles. Rough handling of the instru-

ment. and especnally the CRT. is to avoaded.

CONTENTS

SECTION 1. SPECIFICATIONS
SECTION 2. FEATURES ...........
SECTION 3. CRT SPECIFICATIONS.
SECTION 4. BLOCK DIAGRAM .....
SECTION 5. CIRCUIT DESCRIPTION ..
SECTION 6. VIEWS ..........................
SECTION 7. PRINTED CIRCUIT BOARDS.
SECTION 8. PARTS LIST ........................
SECTION 9. PACKING .......
SECTION 10. DISASSEMBLY.
SECTION 11. ADJUSTMENT ...........
SECTION 12. TROUBLE SHOOTING ..
SECTION 13. FAN DISPLAY OPTION.
SECTION 14. SCHEMATICS ......

ILLUSTRATIONS:

Fig. 3-1 CRT Basing ......................................................................................

Fig. 4-1 SM-220 Block Diagram ................
Fig. 5-1 Principle of Oscilloscope Display
Fig. 5-2 Displayed Waveform ...........................
Fig. 10-1 Front Panel Assembly Parts Blow-05)..
Fig. 10-2 Case Removal ............................
Fig. 10-3 Greticule Removal/Installation
Fig. 10-4 CRT Removal ............................
Fig. 11-1 Adjustment ...........................................................
Fig. 11-2 V. ATT. High Frequency Response Compensation.
Fig. 11 -3 Two-Tone Oscillator Balance Adjustment.
Fig. 13-1 Block DiagramlBS-B, 8) ...........................
Fig. 13-2 Ceramic Filter Frequency Characteristics...
Fig. 13-3 55-5. 8 Installation ..................................
Fig. 13-4 Pen Display Adjustments ..
Fig. 13-5 Pan Display Waveform