Owner`s manual
1
1
2
3
4
4
1 2 3 5 6 7
8
TP G
TP G
TP 5
TP 5
TP 6
TP 6
TP 7
TP 7
TP 8
TP 8
BIAS TRIMS
BIAS TRIMS
ADJUST FOR 250 mV DC
ADJUST FOR 250 mV DC
WITH
WITH
NO SIGNAL
NO SIGNAL
SPEAKERS
SPEAKERS
SPEAKERS
SPEAKERS
5
6
7
8
TP 1
TP 1
TP 2
TP 2
TP 3
TP 3
TP 4
TP 4
CD
CD
VIDEO
VIDEO
TUNER
TUNER
AUX
AUX
CD
CD
VIDEO
VIDEO
TUNER
TUNER
AUX
AUX
AUX
AUX
TUNER
TUNER
VIDEO
VIDEO
CD
CD
AUX
AUX
TUNER
TUNER
VIDEO
VIDEO
CD
CD
VOLUME
VOLUME
BALANCE
BALANCE
PHONE (909) 627-4256
PHONE (909) 627-4256
FAX
FAX
(909) 628-2482
(909) 628-2482
service@manleylabs.com
service@manleylabs.com
OFF /
OFF /
ON
ON
POWER
POWER
IEC MAINS
IEC MAINS
FUSE 3 AMP
FUSE 3 AMP
SLO-BLO
SLO-BLO
REPLACE FUSE ONLY
REPLACE FUSE ONLY
WITH THE SAME TYPE
WITH THE SAME TYPE
AND VALUE
AND VALUE
CAUTION: DO NOT OPEN,
CAUTION: DO NOT OPEN,
HIGH
HIGH
VOLTAGE.
VOLTAGE.
REFER ALL SERVICING TO
REFER ALL SERVICING TO
QUALIFIED PERSONNEL
QUALIFIED PERSONNEL
WARNING: TO REDUCE THE
WARNING: TO REDUCE THE
RISK OF FIRE OR ELECTRIC
RISK OF FIRE OR ELECTRIC
SHOCK DO NOT EXPOSE TO
SHOCK DO NOT EXPOSE TO
RAIN OR MOISTURE
RAIN OR MOISTURE
MANLEY LABS
MANLEY LABS
13880 MAGNOLIA AVE
13880 MAGNOLIA AVE
CHINO, CA 91710 USA
CHINO, CA 91710 USA
BIAS TEST POINTS
BIAS TEST POINTS
BIAS TEST POINTS
BIAS TEST POINTS
GROUND for
GROUND for
BIAS
BIAS
MEASUREMENTS
MEASUREMENTS
(BLACK LEAD GOES HERE)
(BLACK LEAD GOES HERE)
FUSE
FUSE
MAINS
MAINS
ON/OFF
ON/OFF
BIAS TRIMS
BIAS TRIMS
TRIODE/UL
TRIODE/UL
LOOP ACTIVE/BYPASS
LOOP ACTIVE/BYPASS
SUB OUT
SUB OUT
LOOP RETURN
LOOP RETURN
REC OUT / LOOP
SEND
REC OUT / LOOP SEND
TRIODE/UL
TRIODE/UL
LOOP ACTIVE/BYPASS
LOOP ACTIVE/BYPASS
SUB OUT
SUB OUT
LOOP RETURN
LOOP RETURN
REC OUT / LOOP SEND
REC OUT / LOOP SEND
-
+
-
+
6414
6414
6414
6414
12AT7
12AT7
12AT7
12AT7
EL84
EL84
EL84
EL84
EL84
EL84
EL84
EL84
EL84
EL84
EL84
EL84
EL84
EL84
EL84
EL84
TOP VIEW
TUBE LOCATIONS - See the diagram above for the proper tube locations. Power
should be unplugged and the tubes cool before handling them. We label the tube
sockets, test points and trimmers to help. It is possible to put tubes in wrong if you
bend the pins - not good. On this diagram we added dashed lines to further clarify
which test points are associated with which tube and which trimmer but they are
numbered right on the chassis.
Refer to pages page 16 to 18 if you are unsure about replacing tubes and setting the
bias. A full description is given.
Once that you've learned a bit about setting bias, we provide a bias trim pot and test
point for each tube that should be referred to ground or TPG (The butt of the
Stingray logo). Aim for .25V DC volts or 250 mV DC. All of the important info is
silk-screened on the chassis.
Notice that there are two fuses for the B+. These are 250 mA SLO-BLO ( MDL 1/4)
types. They are supposed to blow with some types of tube shorts and prevent
damage to the amps. ALWAYS let the amps sit unpowered for at least 20 minutes
before attempting to check them out - SHOCK HAZARD - there can be very high
volts here until the power supply capacitors discharge. See page 8 for details.
10
B+ FUSE
MDL 1/4
(underneath)