Kenwood CS 1554 HU Service Manual
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Extracted text from Kenwood CS 1554 HU Service Manual (Ocr-read)
Page 2
CONTENTS
SPECIFICATIONS ................................................. 3
CONTROLS AND CONNECTORS ON FRONT PANEL ............... » ......... 4
CONTROLS AND CONNECTORS ON REAR PANEL ......................... 5
CIRCUIT DESCRIPTION ........................................... 6 ~ 9
TROUBLE SHOOTING ....................................... . 10 ~ 13
VOLTAGE WAVEFORMS AT INDIVIDUAL POINTS OF CIRCUIT ............. 19 ~ 20
ADJUSTMENT POINTS ON PC BOARD .................................. 2_I
ADJUSTMENT ................................................. 22 ~ 27
PARTS LAYOUT (FRONT VIEW) ...................................... 23
PARTS LAYOUT (REAR VIEW) ..................................... . 29
PARTS LAYOUT (TOP VIEW). . 30
PARTS LAYOUT (SIDE VIEW) ........................................ 31
PARTS LAYOUT (BOTTOM VIEW) ...................................... 32
PC BOARD VERTICAL AMPLIFIER UNIT (X73-0011»00) ...................... 33
PC BOARD HORIZONTAL AMPLIFIER UNIT (X650008~01) ................... 34
PARTS LIST OF 091554 ......................................... 35 ~ 39
PARTS LIST OF xes-oooam ..... . ..
PARTS LIST OF X73-OOI1»00 ...................................... 43 ~ 45
BLOCK DIAGRAM ................................................. 45
SCHEMATIC DIAGRAM ............................................. 46
COLOR CODE ........................................... . ......... 47
Page 17
r"
TROUBLE SHOOTING
© Trigger confirmation.
®*--(EB
Check EXT triggering.
-> Check INT triggering.
M ii
a.
be
S107, 108 have defective ccntacts,
Check waveform at terminal #29 on printed
Defective 06, 7 on printed circuit board X65~000870L circuit board X73-0011-00.
GD
Defective 043, 44 (28A562Y, 250458) located on X73-0011-00.
Defective $107.
l
Check CH1 triggering
Check waveform at terminal #30 on printed
circuit board X73-001 1-00.
(E9
CH1 trigger signal amplifier located on printed circuit board X73-
0011-00.
Defective 033 thru 40, 47 (033 thru 37, 40 and 47 28C458; 033 and
39 28A562Y).
Defective S107.
l7
Page 20
VOLTAGE WAVEFORMS AT INDIVIDUAL POINTS OF CIRCUIT
(3) MILLER INTEGRATOR CIRCUIT .d
* 017 thru 20 (017, 28K30 (0); Que thru 20, 280371R) located on
printed circuit board X65-0008-01.
Collector waveform of 018
l7V---- --~- ---- -
Gate waveform of 017
4.0V ------
3.5V -----' --------
0V- 0V
Emitter waveform of 020
£2
(4) WAVEFORMS OF HOLD-OFF CIRCUIT
" O14 (280371R) located on printed circuit board X65-0008-01.
Base waveform of 014 Emitter waveform of 014
UV ----------- ----~- -
2v ------ --- ---
0V
20