Sign In
Upload
Download
Table of Contents
Contents
Add to my manuals
Delete from my manuals
Share
URL of this page:
HTML Link:
Bookmark this page
Add
Manual will be automatically added to "My Manuals"
Print this page
×
Bookmark added
×
Added to my manuals
Manuals
Brands
Motorola Manuals
Two-Way Radio
Professional GP340
Service manual
Troubleshooting Flow Chart For Synthesizer - Motorola Professional GP340 Service Manual
Hide thumbs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
page
of
290
Go
/
290
Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Advertisement
3-6
4.0
Troubleshooting Flow Chart for Synthesizer
Check D3701,
D3702, U3701,
Problem
C3701 - C3707
YES
5V
NO
Is U3701
at pin 6 of
Pin47 AT = 13
D3701
NO
Check
L3701,
R3701
Is
U3701
Pin 19<0.7 VDC
in RX & >4.3 VDC
in TX?
YES
Is
U3701 Pin
18 AT 4.54
VDC?
YES
Is RF level at
U3701 Pin 32
>-30 dBm?
YES
Are
C3721,
C3722,C3723,
R3721, R3722,
R3723
OK?
YES
Replace
U3701
NO
Correct
VDC
YES
Check Q260,
Q261 & R260
NO
U3701
YES
pin 2 at >3V
in Tx and
<0.7V in
Rx
NO
NO
Replace
If R3727, C3726 & C3727
NO
are OK, then see VCO
troubleshooting chart
Replace or
NO
resolder
necessary
components
Start
Visual
check of the
Board
OK?
YES
YES
+5V
NO
at U3701
Pin's
13 & 30?
Check 5V
Regulator
Are
NO
signals at
Pin's 14 &15
of U3701
?
YES
Is
there a short
NO
between Pin 47 and
Pins 14 & 15 of
U3701?
YES
Remove
Shorts
TROUBLESHOOTING CHARTS
3.3V
NO
at U3701
Check
pins 5, 20,
U3201,
34 & 36
L3731
YES
Is
16.8MHz
16.8MHz
NO
signal at
Signal at
U3701 pin
U3701 Pin
19?
YES
Check Y3761,
C3761, C3762,
C3763, D3761 &
R3761
Are
Waveforms
NO
at Pins 14 & 15
triangular?
YES
Pins 7,8 & 9
NO
of U3701 toggle
when channel
is changed
Check prgramming
lines between U409
and U3701
Pins 7,8 & 9
NO
information
from mP U409
Check uP U409
Troubleshooting
Chart
Replace
U3701
Is
YES
Replace
U3701
23?
NO
Do
?
YES
Is
correct
?
YES
Table of
Contents
Previous
Page
Next
Page
1
...
175
176
177
178
Show Quick Links
Quick Links:
Gp340 Model Chart
Technical Specifications
Pcb 8485726Z01 - Schematics
Hide quick links:
Permanently
Temporary
Cancel
Advertisement
Chapters
Table of Contents
15
Pcb/Schematics/Parts Lists
37
Table of Contents
63
Table of Contents
81
Table of Contents
97
Table of Contents
149
Table of Contents
257
Table of Contents
Troubleshooting
Chapter 3 TROUBLESHOOTING CHARTS
31
Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)
32
Troubleshooting Flow Chart for Transmitter
33
Troubleshooting Flow Chart for Synthesizer
34
Troubleshooting Flow Chart for VCO
35
Troubleshooting Chart
84
Chapter 3 TROUBLESHOOTING CHARTS
171
Troubleshooting Flow Chart for Receiver for all models except those with PCB 8486473Z04
172
Troubleshooting Flow Chart for Receiver for models with PCB 8486473Z04
174
Troubleshooting Flow Chart for Transmitter
175
Troubleshooting Flow Chart for Synthesizer
176
Troubleshooting Flow Chart for VCO
177
Troubleshooting Flow Chart for Receive Message/Personal Memo Recording
178
Troubleshooting Flow Chart for Message Playback
179
Chapter 3 TROUBLESHOOTING CHARTS
271
Related Manuals for Motorola Professional GP340
Radio Motorola GP Series Detailed Service Manual
Professional portable radio uhf 800mhz dsm (494 pages)
Radio Motorola GP Series Service Manual
Professional radio uhf2 (450 - 527mhz) (300 pages)
Two-Way Radio Motorola GP640 Basic User's Manual
(154 pages)
Radio Motorola GP Series Service Information
Professional radio, vhf 136-174mhz (108 pages)
Two-Way Radio Motorola GP680 User Manual
Professional radio (62 pages)
Radio Motorola GP360 Service Information
Professional radio gp series; power distribution and controller information (52 pages)
Radio Motorola GP Series Service Information
Professional radio (43 pages)
Radio Motorola GP320 Service Information
Gp series (32 pages)
Radio Motorola GP Series Service Information
Professional radio, lowband (29.7-42mhz and 35-50mhz) (31 pages)
Two-Way Radio Motorola GP Series Service Information
Professional radio, power distribution and controller (30 pages)
Radio Motorola GP Series Manual
Professional radio (30 pages)
Radio Motorola GP640 Service Information
Gp600 series (28 pages)
Radio Motorola GP340 Service Information
Gp series 300r1 (300 - 350mhz) (26 pages)
Radio Motorola GP series Service Manual
Professional radio (26 pages)
Radio Motorola GP Series Service Information
Professional radio, lowband 29.7-42mhz and 35-50mhz (24 pages)
Radio Motorola GP Series User Manual
Professional radio (16 pages)
Related Content for Motorola Professional GP340
CDM Series Troubleshooting Flow Chart For Synthesizer
Motorola CDM Series
HT Series Troubleshooting Flow Chart For Synthesizer
Motorola HT Series
GP328 Plus Troubleshooting Flow Chart For Synthesizer
Motorola GP328 Plus
HT Series Troubleshooting Flow Chart For Synthesizer
Motorola HT Series
CDM Series Troubleshooting Flow Chart For Synthesizer
Motorola CDM Series
CDM1550 LS+ Synthesizer Troubleshooting Chart (200 Mhz)
Motorola CDM1550 LS+
HT1250-LS+ 4.12 Passport Trunking Troubleshooting Chart
Motorola HT1250-LS+
ASTRO Spectra Consolette Does Not Work Troubleshooting Chart
Motorola ASTRO Spectra
XTS 2500 Vhf Radio Main Troubleshooting Chart
Motorola XTS 2500
APX 3000 Table 9-3. Receiver Troubleshooting Chart
Motorola APX 3000
APX 1000 Table 9-3. Receiver Troubleshooting Chart
Motorola APX 1000
APX 5000 Table 9-3. Receiver Troubleshooting Chart
Motorola APX 5000
APX 7000 Table 9-3. Receiver Troubleshooting Chart
Motorola APX 7000
CP150 Troubleshooting Table For Synthesizer
Motorola CP150
RMV2080 Default Frequencies Chart
Motorola RMV2080
Spectra Synthesizer Troubleshooting
Motorola Spectra
This manual is also suitable for:
Professional gp680
Professional gp640
Gp series
Table of Contents
Print
Rename the bookmark
Delete bookmark?
Delete from my manuals?
Login
Sign In
OR
Sign in with Facebook
Sign in with Google
Upload manual
Upload from disk
Upload from URL