JBL GTO 75.2 User manual

GTO Series
75.2
75.2II
2 CHANNEL POWER AMPLIFIER
SERVICE MANUAL
JBL Consumer Products
250 Crossways Park Dr.
Woodbury, New York 11797 Rev1 3/2005

- CONTENTS -
SPECIFICATIONS ………………………………….……..1
FEATURES/TEST CONDITIONS……..…………………2
INSTALLATION………………….……...……..…...…...…3
CONNECTIONS………………….……...……..…...…..…4
SET-UP/CONTROLS ……..………………..…….….…...5
INSTALLING NEON TUBES..…….…….………………..5
BASIC TROUBLESHOOTING..…….…….………………6
TYPICAL SYSTEM WIRING..…….…….……………..…7
EXPLODED VIEW/PARTS LIST…….….….…………....8
MECHANICAL PARTS LIST..…….…….……………......9
AMPLIFIER BLOCK DIAGRAM…………………….……10
P.C.B. DRAWINGS….……………………………….…….11
ELECTRICAL PARTS LIST ..……….……….…….….…13
VERSION II ELECTRICAL PARTS LIST ADDENDUM….……….16
IC/TRANSISTOR PINOUTS..……..….…….….….….…..17
GTO75.2 SCHEMATICS………..……………...………...19
GTO75.2II SCHEMATICS……………….….…………...21
PACKING……..…………………………………………....23
GTO 75.2/75.2II Specifications
Output Power: 97W RMS x 2 channels @ 4 ohms; ≤1% THD + N
(14.4V supply) 145W RMS x 2 channels @ 2 ohms; ≤1% THD + N
290W RMS x 1 channels @ 4 ohms; ≤1% THD + N
Signal-to-noise ratio: 82dBA (reference 1W into 4 ohms)
Dynamic power: 190W @ 2 ohms
Effective damping factor: 6.39 @ 4 ohms
Frequency response: 10Hz – 90kHz (–3dB)
Maximum input signal: 5.5V
Maximum sensitivity: GTO 75.2 - 230mV
GTO 75.2II - 75mV
DC Offset <50mV (-50%)
Output regulation: .098dB @ 4 ohms
Idle Current 1.0A
Input Impedance 22kΩ
Max Current Draw 23A @ 4 ohms
37A @ 2 ohms
Dimensions: 11 5/8 x 12 5/16 x 2 3/8” (L x W x D)
(295mm x 313mm x 60mm)
Fuse: 30A
JBL continually strives to update and improve existing products, as well as create new ones. The specifications and details in
this and related JBL publications are therefore subject to change without notice.
1
Power Amplifier GTO 75.2/75.2II

2
GTO 75.2/75.2II

INSTALLATION
2
WARNING: Playing loud music in an
automobile can hinder your ability to hear
traffic and permanently damage your
hearing. We recommend listening at low or
moderate levels while driving your car. JBL
accepts no liability for hearing loss, bodily
injury or property damage resulting from
the use or misuse of this product.
IMPORTANT: To get the best
performance from your JBL Grand Touring®
Series amplifiers, we strongly recommend
that installation be entrusted to a qualified
professional. Although these instructions
explain how to install GTO amplifiers in a
general sense, they do not show specific
installation methods that may be required
for your particular vehicle. If you do not
have the necessary tools or experience,
do not attempt the installation yourself.
Instead, please ask your authorized JBL
car audio dealer about professional
installation.
INSTALLATION
WARNINGS AND TIPS
•Always wear protective eyewear when
using tools.
•Turn off the audio system and other
electrical devices before you start.
Disconnect the (–) negative lead from
your vehicle’s battery.
•Check clearances on both sides of
a planned mounting surface before
drilling any holes or installing any
screws. Remember that the screws
can extend behind the surface.
•At the installation sites, locate and
make a note of all fuel lines, hydraulic
brake lines, vacuum lines and electrical
wiring. Use extreme caution when cut-
ting or drilling in and around these areas.
•Before drilling or cutting holes, use a
utility knife to remove unwanted fabric
or vinyl to keep material from snagging
in a drill bit.
•When routing cables, keep input-signal
cables away from power cables and
speaker wires.
•When making connections, make
certain they are secure and properly
insulated.
•If the amplifier’s fuse must be replaced,
use only the same type and rating as
that of the original. Do not substitute
another kind.
CHOOSING A LOCATION
AND MOUNTING THE
AMPLIFIER
Choose a mounting location in the trunk
or cargo area where the amplifier will not
be damaged by shifting cargo. Amplifier
cooling is essential for proper amplifier
operation. If the amplifier is to be installed
in an enclosed space, make sure there is
sufficient air circulation for the amplifier
to cool itself.
When mounting the amplifier under a
seat, ensure that it is clear of all moving
seat parts and does not affect the seat
adjustments. Mount the amplifier so it
is not damaged by the feet of backseat
passengers. Make sure that the amplifier
is mounted securely using nuts and bolts
or the supplied mounting screws.
Mount the amplifier so that it remains
dry – never mount an amplifier outside
the vehicle or in the engine compartment.
POWER CONNECTIONS
The GTO amplifiers are capable of
delivering extremely high power levels,
and require a heavy-duty and reliable
connection to the vehicle’s electrical system
in order to perform optimally. See Figure 1
for connection location. Please adhere to
the following instructions carefully:
Ground Connection
Connect the amplifier’s Ground (GND)
terminal to a solid point on the vehicle’s
metal chassis, as close to the amplifier
as possible. Refer to the chart below to
determine minimum wire-gauge size. Scrape
away any paint from this location; use a star-
type lock washer to secure the connection.
Power Connection
Connect a wire (see chart at right for
appropriate gauge) directly to the vehicle’s
positive battery terminal, and install an
appropriate fuse holder within 18" of the
battery terminal. Do not install the fuse at
this time. Route the wire to the amplifier’s
location, and connect it to the amplifier’s
Positive (+12V) terminal. Be sure to use
appropriate grommets whenever routing
wires through the firewall or other sheet
metal. Failure to adequately protect the
positive wire from potential damage may
result in a vehicle fire. When you are done
routing and connecting this wire, you may
install the fuse at the battery.
Remote Connection
Connect the amplifier’s Remote (REM)
terminal to the source unit’s Remote Turn-
On lead using a minimum of 18-gauge wire.
NOTE: When using the speaker level
inputs, connect the remote (REM) terminal
to the source unit. If your source unit does
not have a remote turn-on connection,
connect the amplifier’s (REM) terminal to
the vehicle’s accessory circuit.
Speaker Connections
Refer to the application guides on the
pages that follow. Speaker connections
should be made using a minimum of
16-gauge wire.
High-Level Input Connections
The GTO75.2/75.2II
amplifiers are equipped with speaker-level
inputs that allow you to add an amplifier
to head units that do not have RCA line
outputs. The speaker outputs for the
source unit should be connected to the
amplifier using the supplied connector
(square four-wire plug). Remember to
check for proper polarity.
.
NOTE: When using the high-level inputs,
the AUX outputs can be used to pass a
line-level signal to another amplifier.
Wire Gauge Chart
Amplifier Maximum Minimum
Model Current Draw Wire Gauge
GTO75.2/75.2II 34A #8 AWG
G75.4
GTO755.6 87A #8
GTO301.1 40A #8
GTO601.1 69A #6
GTO1201.1 115A #4 AWG
These recommendations assume 7' – 10'
wire runs. If your installation differs mark-
edly, you will need to adjust the wire
gauge accordingly.
IMPORTANT NOTE: If you are planning
to use optional neon tubes, install them
before making any electrical connections
to the amplifier (refer to“Installing Neon
Tubes” on page 5).
Figure 1. Terminal connection end plate.
GTO Amp OM 2/3/04 3:54 PM Page 2
3
GTO 75.2/75.2II

3
FREQ
MODE
HP LP FLAT
+
–
Figure 4. GTO75.2/75.2II amplifier set up for stereo operation. Figure 5. GTO75.2/75.2II amplifier set up for bridged-
mono operation.
CONNECTIONS – GTO75.2/75.2II
The JBL GTO75.2/75.2II amplifier can be
set up for stereo or bridged-mono
operation, as shown in Figures 4 and 5.
NOTE: For simplicity, Figures 4 and 5
do not show power, remote and input
connections.
NOTE: Minimum speaker impedance
for stereo operation is 2 ohms.
Minimum speaker impedance for
bridged operation is 4 ohms.
FREQ
MODE
HP LP FLAT
+
–
–
+
GTO Amp OM 2/3/04 3:54 PM Page 3
4
GTO 75.2/75.2II

6
INSTALLATION AND SETUP
SETTING THE
CROSSOVER(S)
Determine your system plans and set the
crossover mode switch accordingly. If you
plan to use the GTO75.2/75.2II to drive
full-range speakers, set the crossover
mode to FLAT and skip to “Setting Input
Sensitivity.”
Initially set the crossover frequency
control midway. While listening to music,
adjust the crossover for the least
perceived distortion from the speakers,
allowing them to reproduce as much
bass as possible.
Systems using a separate subwoofer set
the crossover mode to HP (high pass) for
your full-range speakers. Adjust the
crossover frequency to limit bass and
provide increased system volume with
less distortion.
For subwoofers, choose the highest
frequency that removes vocal information
from the sound of the subwoofer.
If using the GTO75.2/75.2II to drive a
subwoofer(s), set the crossover mode to
LP (low pass).
SETTING INPUT
SENSITIVITY
1. Initially turn the INPUT LEVEL control(s)
to minimum (counter clockwise).
2. Reconnect the (–) negative lead to the
vehicle’s battery. Apply power to the
audio system and play a dynamic music
track.
3. On the source unit, increase the volume
control to 3/4 volume. Slowly increase
the INPUT LEVEL control(s) toward three
o’clock until you hear slight distortion
in the music. Then reduce the INPUT
LEVEL slightly until distortion is no
longer heard.
NOTE: After the source unit is on, red LEDs
(on the top panel) will light, indicating the
amplifier is on. If not, check the wiring,
especially the remote connection from the
source unit. Also refer to “Troubleshooting”
on the next page.
AUX OUTPUT
The GTO75.2/75.2II amplifiers are
equipped with full-range outputs that can
be used to connect additional amplifiers.
NOTE: When using the high-level inputs,
the AUX outputs can be used to pass a
line-level signal to another amplifier.
INSTALLING NEON TUBES
(OPTIONAL)
1. Using a Phillips screwdriver, remove all
screws on the amplifier’s output/power
end panel and set them aside.
2. Using a 3⁄32-inch Allen wrench, remove
only the screws on the amplifier’s (top)
clear cover and set them aside.
3. Remove the end panel and slide the
cover off. Set both parts aside.
4. Locate the enclosed hardware bag and
remove the four clips. Each clip has a
square end and a larger round end.
Using a round end, press two clips onto
each neon tube (e.g., Street Glow AN9
or equivalent), as shown in Figure 13.
5. For each tube, align both clips so the
square ends slide onto an exposed
extrusion edge, as shown in Figure 9.
Do not cover any screw holes. When
installed correctly, each neon tube will
sit under an extrusion and not be visible
when viewed from directly above.
6. Route each neon tube’s power cable
through its respective NEON hole on the
end panel (see Figure 13).
7. Slide the cover back into place and re-
install its screws. Then, replace the end
panel and reinstall its screws.
8. Finish the installation of the neon tubes
as instructed in their owner’s manual.
Figure 12.
GTO Amp OM 2/3/04 3:54 PM Page 6
5
GTO 75.2/75.2II

7
INSTALLATION AND SETUP
To Neon
Power
Supply
To Neon
Power
Supply
Figure 13. Installing neon tubes in a JBL GTO amplifier.
TROUBLESHOOTING
SYMPTOM LIKELY CAUSE SOLUTION
No audio No voltage at BATT+ Check voltages at
(POWER LED or REM terminals, amplifier terminals
is off) or bad or no ground with VOM
connection
No audio DC voltage on Amplifier may need
(PROTECT LED amplifier output service; see enclosed
flashes every warranty card for
4 seconds) service information
No audio Amplifier is Make sure amplifier
(PROTECT overheated cooling is not blocked
LED is on) at mounting location;
verify speaker system
impedance is within
specified limits (see
“Specifications” on
the next page)
No audio Voltage less than 9V on Check vehicle
(PROTECT BATT+ connection charging system for
and POWER defective voltage
LEDs flash) regulator
SYMPTOM LIKELY CAUSE SOLUTION
No audio Voltage more than 16V Check vehicle
(PROTECT or less than 8.5V on charging system for
LED is on) BATT+ connection defective voltage
regulator
Distorted audio Input sensitivity is Check INPUT
not set properly, or LEVEL setting; or
amplifier or source check speaker wires
unit is defective for shorts or grounds
Distorted audio Short circuit in Remove speaker leads
and PROTECT speaker or wire one at a time to locate
LED flashes shorted speaker or
wire, then repair
Music lacks Speakers are not Check speaker
“punch” connected properly connections for
proper polarity
GTO Amp OM 2/3/04 3:54 PM Page 7
6
GTO 75.2/75.2II

Grand TouringGrand Touring
7
GTO 75.2/75.2II

7
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GTO 75.2/75.2II
GTO 75.2/75.2II EXPLODED VIEW

9
GTO 75.2/75.2II
GTO 75.2/75.2II Mechanical Parts List

10
GTO 75.2/75.2II
GTO 75.2/75.2II BLOCK DIAGRAM

R110
10K
J154
10m/m
TER02
DST0014-00
C61
1000/35V"SHL"
HI01
LAD1140-04PBK
U106
NJM2068LD
U107
NJM2068LD
R195
1K
R196
1K
R199
6.8K
L01
CL-500
R198
150K
J72 6m/m
R197
39K
C199
104(M)
R15
10
C198
104(M)
C197
47P
R295
1K
R296
1K
R299
6.8K
R298
150K
R297
39K
J60 22m/m
C299
104(M)
C298
104(M)
C297
47P
J135
6m/m
J119
6m/m
R102
47KF
J141
6m/m
FH01
WF-9402P
J70
7.5m/m
J111
11m/m
J112
22m/m
J87
22m/m
J88
22m/m
J8922m/m
SW101
JSS2319
J136
6m/m
R225
10KF
R226
10KF
R228
1K
R227
1K
C226
22P
R229
100K
C126
22P
R128
1K
R127
1K
R126
10KF
R125
10KF
U111
NJM2068LD
R213
5.6K
R222
10K
R224
270K
R223
270K
R124
270K
R123
270K
C123
22/16V
C124
22/16V
C223
22/16V
C224
22/16V
J9022m/m
J86
12.5m/m
BJ01 55m/m
J83 17.5m/m
J9315m/m
J10922m/m
J104
22m/m
J331 6m/m
R44
47
R270
0.1/3W
R54
47
J54
12.5m/m
R25
68K
R92
1K
Q90
C3198GR
LED01
HNRD-3401L
R101
22KF
J2812.5m/m
R103
47KF
U101
NJM2068LD
C228
4.7/50V
C103
22/16V
C128
4.7/50V
R129 100K
D11
1SS133
J156m/m
J94
7.5m/m
RCA101
DJB-554A
C102
22/16V
J336
10m/m
R106
47KF
R262
680/2W
D02
IN4004
C400
473P
R53
47
R105
47KF
R261
4.7/0.5W
C105
22P
J18 6m/m
J8017.5m/m
J166m/m
J10115m/m
C106
22P
C01
105(M)
VR101
20KB
R162
680/2W
J13
7.5m/m
C104
10P
C31
105(M)TL
R201
22KF
J49
12.5m/m
C202
22/16V
C203
22/16V
R205
47KF
J44
12.5m/m
R203
47KF
J22
12.5m/m
J2612.5m/m
R206
47KF
R202
47KF
C206
22P
C205
22P
C204
10P
R107
1K
R52
1K
C04
2200/25V"WL"
C03
104P
C171
100/16V
VR102
50KC
C201
102P
C101 102P
C255
10/16V
J124
6m/m
C155
10/16V
R208
750F
R236 47
TER01
DST0013-00
R108
750F
U102
NJM2068LD
J27
12.5m/m
R60
10.5KF
R155
15.2KF
R255
15.2KF
J115
7.5m/m
R156
91KF
R256
47KF
R257
9.4KF
J313
7.5m/m
C156
18P
C256
33P
U103
NJM2068LD
U104
NJM2068LD
J181 6m/m
R111
10K
C11147P
R113
5.6K
C113
823(M)
J114
7.5m/m
U105
NJM2068LD
C115
823(M)
C67
47/50V
J108
22m/m
R114
10K
R210
10K
C211
47P
R211
10K
J137
10m/m
C213
823(M)
R215
5.6K
LED02
TOL-30aSBaCAa-B2
C215
823(M)
R212
10K
R214
10K
J10
7.5m/m
J37
10m/m
R151
1.5K
Q135
TIP35C
Q145
TIP36C
Q244
A1023Y
D01 1N5404
C131
2.2/50V
R121
22KF
R141
1K
R120
1KF
R220
1KF
R131
1K
J62 22m/m
J106
22m/m
J69
15m/m
C08
222(M)
R30
100/2W
Q251
C3200GR
C232
100P
C242
100P
D251
1SS133
J9111m/m
C141
2.2/50V
R250
120
J19
15m/m
J9710m/m
C22168P
R62
4.7KF
R115
5.6K
Q181
C3198GR
J45
12.5m/m
Q281
C3198GR
R191
330/2W
Q232
C3198GR
J73
6m/m
C16
47/25V
J85 12.5m/m
J67
17.5m/m
Q233
A1266GR
Q23
A1266GR
R181 56K
R252 15K
D04
1SS133
J65
10m/m
Q33
A1266GR
J110
11m/m
R2373.9K
Q01
A1023Y
C240
473(M)
Q21
C3198BL
R247
2.7K
Q12
A1266GR
D03
1SS133
R51
220/0.5W
Q11
A1266GR
Q02
C3198GR
Q22
A1268GR
D54
FR154
J8217.5m/m
R43
47
J8117.5m/m
R42
1K
R22 24K
R13 10K
TH01
FTD5-350
J79
17.5m/m
J125
6m/m
R260
0.1/3W
R21 24K
R170
0.1/3W
J40
7.5m/m
Q43
FQP50N06
U01
TL494CN
C32
105(M)TL
C53
473P
Q54
FQP50N06
J7620m/m
J71 6m/m
J25
12.5m/m
C63
473P
J121
6m/m
J29
12.5m/m
C51
1000/35V"SHL"
R32
22K Q53
FQP50N06
R11 4.7K
R01
4.7K
C22104P
C220
2.2/50V
R35 15K
R14 10K
C21
102(M)
R33
33K
Q140
C3200GR
R234 22
J129
6m/m
Q240
C3200GR
J05
17.5m/m
R34 15K
R12
3.9K
R281
56K
C13
100/16V
C12
100/16V
R16 750
J84 22m/m
R05
8.2K
R6110K
C33473P
J30
12.5m/m
C181
100/16V
J23
12.5m/m
R04
56K
D41
YG225D2
J330 6m/m
C15
10/25V
R02 4.7K
R41
220/0.5W
C14
47/16V
R31 1K
J9211m/m
J46
12.5m/m
D42
YG225D2
R244
22
Q241
A1266GR
J107
22m/m
R232
5.6K
R271
15KF
J150
12.5m/m
C11
47/16V
C60
104P
R291
330/2W
J6615m/m
J7520m/m
J32
12.5m/m
J3112.5m/m
J130
6m/m
J64
10m/m
J78
20m/m
C120
2.2/50V
Q234
C1027Y
R9047K
J3310m/m
J14
15m/m
J996m/m
J103
20m/m
J102
15m/m
D51
FR154
D53
FR154
L03
CL-300
C161104(M) R161
4.7/0.5W
R272
1.1KF
J3412.5m/m
WIRE
W1
60m/m
D52
FR154
R245 1K
J96
6m/m
Q235
TIP35C
R221
22KF
C57
47/50V
J2412.5m/m
Q245
TIP36C
J4212.5m/m
C231
2.2/50V
J48
12.5m/m
J47
12.5m/m
C241
2.2/50V
J59 22m/m
J38
10m/m
C801
473P
L02
CL-500
J57 10m/m
C271
100/16V
J36
10m/m
C261
104(M)
J310
6m/m
R241 1K
R235 1K
R231 1K
J117
10m/m
J06
17.5m/m
R246
47
J11610m/m
J956m/m
J98 6m/m
J100
6m/m
J5212.5m/m
C251
100P
R251 1.5K
Q151
C3200GR
J39
7.5m/m
J07
12.5m/m
Q144
A1023Y
R2425.6K
J4112.5m/m
Q134
C1027Y
C291
220/16V
J61 22m/m
J176m/m
J74
6m/m
Q143
C3198GR
J5512.5m/m
D191
1N4744
J5312.5m/m
R03
10/0.5W
D291
1N4744
J118 15m/m
7
6
3
2
1
48
5
T01
37PHI
C191
220/16V
R243 22
R172
1.1KF
Q142
A1266GR
C140
473(M)
R171
15KF
R147
2.7K
J10519m/m
Q141
A1266GR
C121
68P
R137
3.9K
D151
1SS133
R152
15K
C142
100P
C132
100P
Q131
C3198GR
Q132
C3198GR
R91 22K
Q133
A1266GR
Q242
A1266GR
Q231
C3198GR
Q44
FQP50N06
Q243
C3198GR
R150
120
R134 22
R144
22
R132
5.6K
R145 1K
R1351K
R146
47
J113
7.5m/m
R142
5.6K
R143 22
R133
22
J68
15m/m
C151
100P
VR103
20KB
R136 47
R233
22
J56 10m/m
J63 22m/m
C62
3300/35V"SHL"
C800
10/16V
R122
10K
R112
10K
C192
330/16V
J131
7.5m/m
J132
6m/m
J133
7.5m/m
J127
12.5m/m
J139
7.5m/m
J140
7.5m/m
J138
6m/m
C200
473P
R192
1K
J35
10m/m
J126 15m/m
J120
10m/m
J11
7.5m/m
J12820 m/m
J01
7.5m/m
J02
7.5m/m
J03
7.5m/m
J04
7.5m/m
J122
7.5m/m
R207
1K
J123
7.5m/m
J09
12.5m/m
J127.5m/m
J43
15m/m
J134
7.5m/m
R160
0.1/3W
J58 25m/m
C292 330/16V
C05
2200/25V"WL"
SCREW
SCREW
SW102
JSS2219
R292 1K
C52
3300/35V"SHL"
J180 6m/m
R63 430K
J08
12.5m/m
J311
6m/m
J312
6m/m
J314
6m/m
J315
7.5m/m
J316
7.5m/m
J317
7.5m/m
J318
7.5m/m
J319
7.5m/m
J320
7.5m/m
J321
7.5m/m
J322
7.5m/m
J323
7.5m/m
J324
7.5m/m
J335
10m/m
J77
20m/m
2 2
2
2
2
2
1
MOST
PAM630-01
LPF OFFHPF
REV.0
GTO75.2
BASSBOOST
LL RR
L
L
L
R
R
R
(0.7x9):(0.7x4)
5T:12T
11
GTO 75.2/75.2II

R195
TER02
C61
HI01
U107
U111
R199
R196
R198
L01
R197
J135
R295
C198
R213
C299
C297
R296
R299
R298
R297
R225
J112
C298
C01
C226
J119
J141
R51
J136
FH01
J94
J111
J87
J88
J89
J90
SW101
J331
R226
R228
R227
R229
C126
R128
C400
R127
R126
R125
R222
U101
R261
R224 R223 R124
R123
R25
C124
C223 C224
C228
J109
J55
BJ01
J80
J101
J104
J108
J15
R181
R270
R54
J28
R92
R101
Q244
R103
J49
R129
U102
C103
C128
C102
R106
D251
J18
RCA101
C202
J137
R105
R262
D02
C105
R281
R201
R107
C106
J16
J67
J124
J69
C104
C31
VR101
R162
J115
C206
C113
R205
J44
C203
C255
R203
J22
R206
J26
J27
R202
R208
C205
C204
R52
R113
R42
C04
C201
C13
VR102
C220
C156
C155
C67
R236
R108
TER01
R60
U103
J45
R155
R255
R156
R256
R257
R111
J114
C256
C111 U104
U105
J73
R114
C211
R115
C215
Q43
C101
C131
J62
R210
R211
C232
R215
J37
C213
R212
C08
R214
R121
J40
J97
R151
Q235
Q245
Q251
D01
C141
R141
R120 R220
R131
R250
J106
J84
J19
C240
R30
Q181
C242
C221
D04
J91
C16
R62
J66
J86
C53
R252
R02
Q281
J85
Q232
R191
Q233
J125
C32
J25
J82
Q23
Q33
R43
R237
D03
J65
Q01
J110
R247
Q21
Q12
R22
Q11
D151
R41
Q02
Q22
Q140
D54
J81
J52
J79
R192
R13
R21
TH01
C03
J71
R260
R32
R170
J39
Q54
U01
C21
C63
Q53
J75
J121
J29
C22
J129
J30
C51
R11
Q44
R01
R35
C33
C15
R14
R33
C161
R234
Q240
R34
J330
Q241
R12
R16
R110
R292
C12
C181
R05
J107
R61
R04
C60
J23
C11
J46
R31
D41
J130
C14
R161
R03
C120
R244
J92
J150
D42
R232 Q234
J59
R271
R90
J32
C271
C251
R291
J14
J78
J31
J34
J99
J33
J64
C57
Q151
R272
J38
J102
J96
J128
J118
D51
D53
L03
C261
R122
R245
J24
W1
D52
R221
Q135
R241
C231
J42
Q145
J48
C241
J47
J53
C800
J61
J57
L02
J36
C291
J117
C191
J95
R235
R231
R246
J116
J76
R251
J56
J98
J100
J17
C121
R242
Q144
J113
J41
Q134
R243
J103
Q143
C115
J63
J74
J132
Q142
J54
D191
J127
C199
D291
J68
T01
Q90
R172
R171
Q141
R15
R147
R137
J105
Q131
C142
R152
R102
R91
C132
C151
Q132
Q133
R150
Q242
Q231
Q243
C123
R134
R144
R132
R145
R135
R146
R142
J131
R143
R133
R136
J126
C200
VR103
R233
R63
J35
J58
C62
J70
J93
R112
C192
J133
J138
J139
J140
D11
J154
J43
J77
J122
J123
R207
J134
C140
R160
U106
C292
C05
SW102
R53
C52
C171
J83
C197
J72
J60
R44
C801
GTO75.2
12
GTO 75.2/75.2II

PART NO NOMENCATURE DESCRIPTION MFR PARTS REF NO Q'TY
TRS-00-00087 TRANSISTOR SMALL SIGNAL PNP KTA1023Y Q01,144,244 3
TRS-00-00088 TRANSISTOR SMALL SIGNAL NPN KTC1027Y Q134,234 2
TRS-00-00091 TRANSISTOR SMALL SIGNAL PNP KTA1268GR Q22 1
TRS-00-00111 TRANSISTOR SMALL SIGNAL NPN KTC3200GR Q151,251 2
TRS-00-00090 TRANSISTOR SMALL SIGNAL PNP KTA1266GR Q11,12,23,33,133,141,142,233,241,242 10
TRS-00-00110 TRANSISTOR SMALL SIGNAL NPN KTC3198GR Q02,90,131,132,143,181,231,232,243,28 10
TRS-00-00109 TRANSISTOR SMALL SIGNAL NPN KTC3198BL Q21 1
DIO-00-00108 DIODE FAST RECOVERY FR154 D51,52,53,54 4
DIO-00-00003 DIODE RECTIFIER IN4004 D02 1
DIO-00-00006 DIODE SWITCHING SIGNAL 1SS133 /1N4148 D03,04,11,151,251 5
RES-00-00577 RESISTOR METAL FILM 1/5WF 750 OHM R108,208 2
RES-00-00437 RESISTOR METAL FILM 1/5WF 1K OHM R120,220 2
RES-00-00386 RESISTOR METAL FILM 1/5WF 1.1K OHM R172,272 2
RES-00-00523 RESISTOR METAL FILM 1/5WF 4.7K OHM R62 1
RES-00-00589 RESISTOR METAL FILM 1/5WF 9.4K OHM R257 1
RES-00-00402 RESISTOR METAL FILM 1/5WF 10K OHM R125,126,225,226 4
RES-00-00399 RESISTOR METAL FILM 1/5WF 10.5K OHM R60 1
RES-00-00425 RESISTOR METAL FILM 1/5WF 15K OHM R171,271 2
RES-00-00421 RESISTOR METAL FILM 1/5WF 15.2K OHM R155,255 2
RES-00-00467 RESISTOR METAL FILM 1/5WF 22K OHM R101,121,201,221 4
RES-00-00537 RESISTOR METAL FILM 1/5WF 47K OHM R102,103,105,106,202,203,205,206,256 9
RES-00-00591 RESISTOR METAL FILM 1/5WF 91K OHM R156 1
RES-00-00610 RESISTOR CARBON FILM 1/5WJ 10 OHM R15 1
RES-00-00660 RESISTOR CARBON FILM 1/5WJ 22 OHM R133,134,143,144,233,234,243,244 8
RES-00-00716 RESISTOR CARBON FILM 1/5WJ 47 OHM R43,44,53,54,136,146,236,246 8
RES-00-00615 RESISTOR CARBON FILM 1/5WJ 120 OHM R150,250 2
RES-00-00747 RESISTOR CARBON FILM 1/5WJ 750 OHM R16 1
RES-00-00633 RESISTOR CARBON FILM 1/5WJ 1K OHM R31,42,52,92,107,127,128,131,135,141 24
R145,192,195,196,207,227,228,231,235,241
R245,292,295,296
RES-00-00598 RESISTOR CARBON FILM 1/5WJ 1.5K OHM R151,251 2
RES-00-00644 RESISTOR CARBON FILM 1/5WJ 2.7K OHM R147,247 2
RES-00-00676 RESISTOR CARBON FILM 1/5WJ 3.9K OHM R12,137,237 3
RES-00-00702 RESISTOR CARBON FILM 1/5WJ 4.7K OHM R01,02,11 3
RES-00-00720 RESISTOR CARBON FILM 1/5WJ 5.6K OHM R113,115,132,142,213,215,232,242 8
RES-00-00734 RESISTOR CARBON FILM 1/5WJ 6.8K OHM R199,299 2
RES-00-00751 RESISTOR CARBON FILM 1/5WJ 8.2K OHM R05 1
RES-00-00608 RESISTOR CARBON FILM 1/5WJ 10K OHM R13,14,61,110,111,112,114,122,210,211 13
R212,214,222
RES-00-00623 RESISTOR CARBON FILM 1/5WJ 15K OHM R34,35,152,252 4
RES-00-00658 RESISTOR CARBON FILM 1/5WJ 22K OHM R32,91 2
RES-00-00663 RESISTOR CARBON FILM 1/5WJ 24K OHM R21,22 2
RES-00-00687 RESISTOR CARBON FILM 1/5WJ 33K OHM R33 1
RES-00-00697 RESISTOR CARBON FILM 1/5WJ 39K OHM R197,297 2
RES-00-00714 RESISTOR CARBON FILM 1/5WJ 47K OHM R90 1
RES-00-00730 RESISTOR CARBON FILM 1/5WJ 56K OHM R04,181,281 3
RES-00-00742 RESISTOR CARBON FILM 1/5WJ 68K OHM R25 1
RES-00-00604 RESISTOR CARBON FILM 1/5WJ 100K OHM R129,229 2
RES-00-00620 RESISTOR CARBON FILM 1/5WJ 150K OHM R198,298 2
RES-00-00706 RESISTOR CARBON FILM 1/5WJ 430K OHM R63 1
13

RES-00-00664 RESISTOR CARBON FILM 1/5WJ 270K OHM R123,124,223,224 4
RES-00-00053 RESISTOR METAL FILM 1/2WJ 4.7 OHM R161,261 2
RES-00-00018 RESISTOR METAL FILM 1/2WJ 10 OHM R03 1
RES-00-00038 RESISTOR METAL FILM 1/2WJ 220 OHM R41,51 2
ELC-00-00223 CAPACITOR ELECTROLYTIC "SMS" 2.2/50V C120,131,141,220,231,241 6
ELC-00-00229 CAPACITOR ELECTROLYTIC "SMS" 4.7/50V C128,228 2
ELC-00-00195 CAPACITOR ELECTROLYTIC "SMS" 10/16V C155,255,800 3
ELC-00-00203 CAPACITOR ELECTROLYTIC "SMS" 10/25V C15 1
ELC-00-00197 CAPACITOR ELECTROLYTIC "SMS" 22/16V C102,103,123,124,202,203,223,224 8
ELC-00-00198 CAPACITOR ELECTROLYTIC "SMS" 47/16V C11,14 2
ELC-00-00205 CAPACITOR ELECTROLYTIC "SMS" 47/25V C16 1
ELC-00-00227 CAPACITOR ELECTROLYTIC "SMS" 47/50V C57,67 2
ELC-00-00199 CAPACITOR ELECTROLYTIC "SMS" 100/16V C12,13,17,171,181,271 6
ELC-00-00200 CAPACITOR ELECTROLYTIC "SMS" 220/16V C191,291 2
ELC-00-00201 CAPACITOR ELECTROLYTIC "SMS" 330/16V C192,292 2
MYC-00-00020 CAPACITOR MYLAR 5% 100V 102(M) J C21 1
MYC-00-00031 CAPACITOR MYLAR 5% 100V 222(M) J C08 1
MYC-00-00038 CAPACITOR MYLAR 5% 100V 473(M) J C140,240 2
MYC-00-00045 CAPACITOR MYLAR 5% 100V 823(M) J C113,115,213,215 4
MYC-00-00094 CAPACITOR MYLAR 5% 100V 104(M) J C161,198,199,261,298,299 6
MYC-00-00085 CAPACITOR MYLAR 5% 63V "TL" 105(M) J C01,31,32 3
CEC-00-00077 CAPACITOR CERAMIC DISK 50V "NPO" 10P F C104,204 2
CEC-00-00084 CAPACITOR CERAMIC DISK 50V "NPO" 18P F C156 1
CEC-00-00090 CAPACITOR CERAMIC DISK 50V "NPO" 22P F C105,106,126,205,206,226 6
CEC-00-00097 CAPACITOR CERAMIC DISK 50V "NPO" 33P F C256 1
CEC-00-00103 CAPACITOR CERAMIC DISK 50V "NPO" 47P F C111,197,211,297 4
CEC-00-00108 CAPACITOR CERAMIC DISK 50V "NPO" 68P F C121,221 2
CEC-00-00073 CAPACITOR CERAMIC DISK 50V "NPO" 100P F C132,142,151,232,242,251 6
CEC-00-00074 CAPACITOR CERAMIC DISK 50V 102P F C101,201 2
CEC-00-00102 CAPACITOR CERAMIC DISK 50V 473P F C33,53,63,200,400,801 6
CEC-00-00076 CAPACITOR CERAMIC DISK 50V 104P F C03,22,60 3
JUP-00-00043 JUMPER 0OHM JUMPER 6m/m J15,16,17,18,71,72,73,74,95 33
J96,98,99,100,119,121,124,125,129,130
J132,135,136,138,141,180,181,310,311,312
J314,330,331
JUP-00-00044 JUMPER 0OHM JUMPER 7.5m/m J01,02,03,04,10,11,12,13,39,40 33
J70,94,113,114,115,122,123,131,133,134
J139,140,313,315,316,317,318,319,320,321
J322,323,324
JUP-00-00045 JUMPER 0OHM JUMPER 10m/m J33,35,36,37,38,56,57,64,65,97 17
J116,117,120,137,154,335,336
JUP-00-00052 JUMPER 0OHM JUMPER 11m/m J91,92,110,111 4
JUP-00-00046 JUMPER 0OHM JUMPER 12.5m/m J07,08,09,22,23,24,25,26,27,28 31
J29,30,31,32,34,41,42,44,45,46
J47,48,49,52,53,54,55,85,86,127
J150
JUP-00-00047 JUMPER 0OHM JUMPER 15m/m J14,19,43,66,68,69,93,101,102,118 11
J126
JUP-00-00048 JUMPER 0OHM JUMPER 17.5m/m J05,06,67,79,80,81,82,83 8
JUP-00-00074 JUMPER 0OHM JUMPER 19m/m J105 1
JUP-00-00049 JUMPER 0OHM JUMPER 20m/m J75,76,77,78103,128 6
JUP-00-00075 JUMPER 0OHM JUMPER 22m/m J59,60,61,62,63,84,87,88,89,90 16
J104,106,107,108,109,112
PART NO NOMENCATURE DESCRIPTION MFR PARTS REF NO Q'TY
14

JUP-00-00042 JUMPER 0OHM JUMPER 25m/m J58 1
ICO-00-00022 I.C P.W.M TL494CN U01 1
ICO-00-00112 I.C DUAL OPAMP (SIP-08P) NJM2068LD U101,102,103,104,105,106,107,111 8
FET-00-00023 F.E.T N-CH MOSFET FQP50N06 Q43,44,53,54 4
TRS-00-00188 TRANSISTOR AUDIO POWER NPN TIP35C Q135,235 2
TRS-00-00207 TRANSISTOR AUDIO POWER PNP TIP36C Q145,245 2
TRS-00-00111 TRANSISTOR SMALL SIGNAL NPN KTC3200GR Q140,240 2
DIO-00-00152 DIODE FAST RECOVERY YG225D2 D41,42 2
DIO-00-00048 DIODE RECTIFIER 1N5404 D01 1
DIO-00-00206 DIODE ZENER 1W 15V 1N4744A D191,291 2
DIO-00-00303 LED BLUE 3PHI TOL-30aSBaCAa-B2LED02 1
DIO-00-00278 LED RED 3PHI HNRD-3401L LED01 1
RES-00-01046 RESISTOR MOR/S 2WJ 100 OHM R30 1
RES-00-01269 RESISTOR MOR/S 2WJ 330 OHM R191,291 2
RES-00-01041 RESISTOR MOR/S 2WJ 680 OHM R162,262 2
RES-00-00895 RESISTOR WIRE WOUND 3WJ 0.1 OHM R160,170,260,270 4
THS-00-00013 THERMISTOR 50K NTC RESISTOR FTD5-350 TH01 1
ELC-00-00183 CAPACITOR ELECTROLYTIC "SHL" 1000/35V C51,61 2
ELC-00-00603 CAPACITOR ELECTROLYTIC "SHL" 3300/35V C52,62 2
ELC-00-00727 CAPACITOR ELECTROLYTIC "WL" 2200/25V C04,05 2
SWI-00-00033 SWITCH SLIDE SWITCH JSS2319 SW101 1
SWI-00-00024 SWITCH SLIDE SWITCH JSS2219 SW102 1
VOL-00-00335 VOLUME V12L5(9x5)G(PH2D)N15S 3B20KB 2 VR101,103 2
VOL-00-00334 VOLUME V12L5(9x5)G(4R)(PH2D)N1515C50KC 4 VR102 1
JUP-00-00005 JUMPER METAL JUMPER 55m/m BJ01 1
COR-TF-00385 CORE 5(0.7X9):12(0.7X4) 37PHI ISU T01 1
COI-00-00023 INDUCTOR BAR COIL CL-300 L03 1
COI-00-00034 INDUCTOR DRUM COIL CL-500 L01,02 2
TER-00-00241 TERMINAL GOLD PLATED(3P) DST0013-00 TER01 1
TER-00-00242 TERMINAL GOLD PLATED(4P) DST0014-00 TER02 1
JAC-00-00043 RCA JACK GOLD PLATED DJB-554A RCA101 1
CON-00-00128 WAFER LAD1140-04PBK HI01 1
WIR-00-00208 WIRE ASS'Y 300m/m CHD1140-04PBK ACCESSORY 1
HOD-00-00009 FUSE HOLDER WF-9402 FH01 1
WIR-00-00015 WIRE AWG #22 BLACK 3.2PHI RIN60m/m W1 1
PART NO NOMENCATURE DESCRIPTION MFR PARTS REF NO Q'TY
15

TUB-00-00008 TEFLON TUBE 0.7PHI 10m/m Q140,240,TH01 4
TUB-00-00009 TEFLON TUBE 0.7PHI 15m/m LED02 2
TUB-00-00006 TEFLON TUBE 0.7PHI 20m/m LED01 2
FUS-AT-00006 AUTO FUSE 30A SET1+ ASS'Y 1 2
PART NO NOMENCATURE DESCRIPTION MFR PARTS REF NO Q'TY
16
GTO 75.2 Version II Electrical Parts List Addendum
The following chart below represents the only electrical parts
differences in Version I and II models:
MODEL PART NAME PART NO SPEC DESIGNATORS
GTO 75.2 RESISTOR RES-00-00577 1/5WF 750 OHM R108,208
1
GTO 75.2II RESISTOR RES-00-00474 1/5WF 240 OHM R108,208
GTO 75.2 RESISTOR RES-00-00421 1/5WF 15.2K OHM R155,2552
GTO 75.2II RESISTOR RES-00-00588 1/5WF 9.1K OHM R155,255
GTO 75.2 RESISTOR RES-00-00589 1/5WF 9.4K OHM R2573
GTO 75.2II RESISTOR RES-00-00541 1/5WF 5.1K OHM R257
GTO 75.2 RESISTOR RES-00-00437 1/5WF 1K OHM R120,2204
GTO 75.2II RESISTOR RES-00-00545 1/5WF 5.6K OHM R120,220
GTO 75.2 RESISTOR RES-00-00386 1/5WF 1.1K OHM R172,2725
GTO 75.2II RESISTOR RES-00-00590 1/5WF 910 OHM R172,272
GTO 75.2 RESISTOR RES-00-00425 1/5WF 15K OHM R171,2716
GTO 75.2II RESISTOR RES-00-00500 1/5WF 30K OHM R171,271

17
GTO 75.2/75.2II

18
GTO 75.2/75.2II

7
1234568
A
B
C
D
E
C800
10/16V
R54
47
R44
47
R01
4.7K
Q01
A1023Y
R02
4.7K
Q02
C3198GR
R05
8.2K
R04
56K
C03
104P
R35
15K
C01
105M
C61
1000/35V
C51
1000/35V
D02
N4004
R61
10K
TH01
50KTH
C67
47/50V
C57
47/50V
D54
FR154
D53
FR154
D51
FR154
C63
473P
D52
FR154
R11
4.7K
R12
3.9K
C11
47/16V
Q11
A1266GR
Q12
A1266GR
R25
68K
R13
10K
R14
10K C12
100/16V
D11
1SS133
R16
750
R31
1K
R32
22K
C15
10/25V
R33
33K
Q22
A1268GR
R34
15K
C16
47/25V
PROT
C33
473P
U01
TL494CN
R21
24K
C21
102(M)
R22
24K C13
100/16V
C14
47/16V
R03
10/0.5W
R41
220/0.5W
Q23
A1266GR
C04
2200/25"WL"
D04
1SS133
R60
10.5KF
R42
1K
R43
47
R53
47
R52
1K
D03
1SS133
Q33
A1266GR
R51
220/0.5W
D01
1N5404
L03
CL-300 FH01
30A
T01
5T:12T
Q54
FQP50N06
Q43
FQP50N06
Q21
C3198BL
D41
YG225D2
D42
YG225D2
C52
3300/35V
C62
3300/35V
C22
104P
R15
10
C08
222(M)
R30
100/2W
C32
105(M)TL
W1
C31
105(M)TL
C53
473P
Q53
FQP50N06
L01
CL-500
L02
CL-500
C60
104P
R62
4.7KF
VEE1
VCC1
VEE
VCC
Q44
FQP50N06
12.97V
0V
0V
0V
33.79V
0V
4.97V
4.97V
4.97V
6.18V
5V
13.69V
13.55V
0.67V
14.38V
13.69V
C17
100/16V
C801
473P
R63
430K
C05
2200/25"WL"
R90
47K
R91
22K
LED01
HNRD-3401L
R92
1K
Q90
C3198GR
2
2
1
-33.84V
33.84V
-33.69V
33.69V
14.4V
(0.7x9):(0.7x4)
CASE GND
16 15 14 13 12 11 10 9
87654321
B+
REM
19
GTO 75.2 Page1 Schematic