Receiver Fault Isolation Chart - Hallicrafters SR-2000 Repair Manual

2-4. RECEIVER FAULT ISOLATION CHART

INJECTION POINT FREQUENCY
1
V15 pin 7 1000 Hz
2
V9B pin 2 1000 Hz
3 V9A Pin 7 1650 KHz
4
V7A Pin 2 1650 KHz
*
5
Tie point 1650 KHz
C59/C60
6
V6 pin 1 1650 KHz
7
V4A Pin 2 6.250
MHz
8
V3A Pin 2 6.250
@
MHz
9
V2A Pin 9 7.250
#
MHz
10
Junction 7.250
~
C15&C20 MHz
11 V1 pin 1 7.250
$
MHz
12
J1 direct from 7.250
**
sig. generator MHz
* May require peaking of T3
# may require peaking of T1
$ May require peaking of L3 and PRESELECTOR
** If the RX is working at this point perform the 6meg
trap alignment. See manual section 8-12-L&M.
WDØGOF 3/7/20014
REPAIR AND RESTORATION OF THE SR-2000
SIGNAL AUDIO
INJECTION OUTPUT
LEVEL
16 vpp ½ wt
1:1 probe
0.4 vpp ½ wt
1:1 probe
5000 uv ½ wt
800 uv ½ wt
650 uv ½ wt
1:1 probe
35 uv ½ wt
40 uv ½ wt
20 uv ½ wt
40 uv ½ wt
25 uv ½ wt
0.5 uv ½ wt
0.5 uv ½ wt
IF GOOD GO TO NEXT TEST. IF NOT CHECK SUGGESTIONS BELOW.
Problem most likely V15 or associated circuitry.
See section 4-2 for details.
Problem is most likely V9B or associated circuitry.
See section 4-3 for details.
Problem is most likely V9A, audio gain pot or
associated circuitry. See section 4-4 for details.
Problem is most likely V7A or associated circuitry.
See section 4-5 for details.
Problem is most likely xtal filter.
Problem is most likely V6 or associated circuitry.
See section 4-7 for details.
Problem is most likely V4A or associated circuitry.
See section 4-8 for details.
Problem is most likely V3 A or B or associated
circuitry. See section 4-9 for details.
Problem is most likely V2A or associated circuitry.
See section 4-10 for details.
Problem is most likely 6.5 MHz traps, S1F, V18 grid or
associated circuitry.
Problem is most likely V1 or associated circuitry.
See section 4-11 for details.
Problem is most likely K1, 6.25 MHz trap, L17 or
associated circuitry.
this point leave all equipment set as they are for
AGC test in next section.
@ May require peaking of T2
~ May require peaking of L10 and PRESELECTOR
Upon successful completion to
11