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NOTE!3 UNLESS SPECIFIED OTHERWISE
1. ALL RESISTORS IN OHMS
2. ALL CAPACITORS IN MICROFARADS
3. COUPONENT DESIGNATORS:
l-99: LEFT CHANNEL
101-199: RIGHT CHANNEL
201-299: COMMON PARTS
301-399: CHASSIS/POWER SUPPLY
4. Ql7/Q117
&
Q20/Q120
NOT PRESENT ON
SERIES 9180
5.
LEFT
CHANNEL ONLY SHOWN
6. STEREO/MONO SWITCH SHOWN IN STEREO
7. VOLTAGE SELECTOR SHOWN IN 1OOV POSITION
6.
Ql/QlOl
&
Q2/Q102
USE TWO 2SK163 SINGLE
JFET'S
OR ONE 2SK389 DUAL
JFET
9. Q3/Q103
&
Q4/Q104
USE TWO 2SJ74 SINGLE JFET'S
OR ONE 251109 DUAL JFET
10. R44/R144. R45/R145. R46/R146. R47/R147. C21/C121.
C22/C122 ARE PRESENT ONLY WHEN USING DUAL JFET’S
2SK389
&
2SJ109
(FOR SUBSTRATE BIASING)
11.
C17/C117.
C18/C118
C19/C119 NOT USED
FUSE CHART
J101
RIGHT INPUT
R34
33.2K
!%I”’
LEF;IiNPUT
R35
47.5K
R33
47.5K 7;
9180/9270
CiRCUIT
SCHEMATIC
HOTI o
, NEUTRAL
REMSED 1
l/13/91
I
DIAGRAM
---
+HV
-HV
I I
I
JJ