H / P P S E MANALPHA ONE/7R/8R/8P AMPLIFIER SERVICE MANUAL
3
Test Point DC Voltage Alpha One DC Voltage Alpha 7R DC Voltage Alpha 8R/8P
20 0.0V 0.0V 0.0V
21 (protection off) 1.6V 1.6V 1.6V
21 (protection on) 5.0V 5.0V 5.0V
22 0.58V 0.17V 0.17V
23 3.4V 3.1V 3.1V
24 -3V -2.7V -2.7V
25 -26V -29V -29V
Between 26 & 27 3.4mV 3.4mV 2.5mV
28 (muted) 35V 35V 35V
28 (protection off) 1V 1V 1V
29 N/A 5V 5V
30 N/A 10.5 10.5V
31
(volume going up)
N/A 0V 0V
31
(volume going down)
N/A 5V 5V
32
(volume going up)
N/A 0V 0V
32
(volume going down)
N/A 5V 5V
PARTS LISTS
The parts for all the units are as the Alpha 7 except where shown.
REF Description Part No Product
C1 ELST 100U 100V 2N710B 7R
C2 PEST 47N 63V 10% 2K347 7R
C3 PCRB 100N 100V 5% RA
5mm
2H410 7R
C4 PEST 47N 63V 10% 2K347 7R
C5 PSTY 33P 160V ENCAP
1PF%
2F033 7R
C7 PPRO 4N7 63V 5% RA 2D247N 7R
C8 PPRO 100P 63V 5% RA 2D110N 7R
C9 ELST 100U 25V 2N710 A1
C10 ELST 22U 20V OSCON 2P622 7R
C10 ELST 22U 63V ELECT 2N622 A1
C11 ELST 100U 100V 2N710B 7R
C12 ELST 100U 100V 2N710B 7R
C13 PEST 15N 63V 10% 2K315 7R
C14 PEST 15N 63V 10% 2K315 7R
C15 SUPPR CAP 4N7 250V 2K247 7R
C16 ELST 100U 25V 2N710 7R
C17 CERD 470P 63V 20% RA 2A147 7R
C18 CERD 1N0 63V 20% RA 2A210 7R
C19 ELST 100U 25V 2N710 7R
C20 CERD 470P 63V 20% RA 2A147 7R
C21 CERD 10N 63V 20% RA 2A310 7R
C22 CERD 10N 63V 20% RA 2A310 7R
C23 SUPPR CAP 4N7 250V 2K247 7R
C24 PPRO 4N7 63V 5% RA 2D247N 7R
C25 PCRB 100N 100V 5% RA
5mm
2H410 7R
C26 PCRB 100N 100V 5% RA
5mm
2H410 7R
C27 ELST 220U 16V 2N722 7R
C28 PCRB 100N 100V 5% RA
5mm
2H410 7R
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