Hallicrafters SR-150, Руководство по эксплуатации и обслуживанию

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By Walter Cates WD0GOF (UPDATE 10/30/2013) 10
SR-150 REFURBISHING AND REPAIRING CONTINUED:
1-8-2-1 RECEIVER TROUBLESHOOTING TABLE.
Injection
point
Injection
signal
Injection
level**
***
Audio
out
If OK go to next step. If not
check suggestions below
1 Pin 1 V13 1KHz 15vpp
1
watt
V13 and associated circuitry,
check K1 switching
2 Pin 8 V11 1KHz 0.3vpp 1 wt V11 and associated circuitry
3
Bottom
C64
1KHz 0.5vpp 1 wt
Shielded wire, R91 and grid ckt
of v11
4 Pin 1 V6 1650KHz 0.015v 1 wt
Check pin 7 V6 for 25vpp of
injection from carrier osc, V6 or
its associated circuitry.
5 Pin 2 V5 1650KHz 0.01v 1 wt V5 and its associated circuitry
6 Pin 2 V17 1650KHz 200uv 1 wt
V17, FL1 and their associated
cktry
7 Pin 2 V4 6.2MHz* 300uv 1 wt V4 and associated cktry
8 Pin 2 V3 6.2MHz* 200uv 1 wt V3 and associated cktry
9 Pin 7 V2 7.3MHz* 10uv 1 wt
Check relay side of C27 for at
least 10vpp of carrier injection,
otherwise V2 and associated
cktry is suspect.
NOTE
If step 9 is successful perform a pre-alignment at this point.
First
reduce the drive from the signal generator until you have ½ watt audio output.
Insure the main tuning is peaked, then adjust T1, T2, and T3 (top and bottom slug) for max audio
output. Throughout this process insure the main tuning is peaked. Keep the audio output at or below ½
watt by adjusting the injection level. This is not intended to be the final I.F. alignment but will enhance
later alignment and final adjustments.
10
Tie point
C17 & L10
7.3MHz^ 40uv 1 wt 6MHz trap, band switch or K2
11 Pin 6 V1 7.3MHz^ 1uv 1 wt V1 and associated cktry
12 J1 7.3MHz 1uv 1 wt Circuitry between J1 and V1
^ Some adjustment of the main tuning and PRESELECTOR will be required.
*Some adjustment of the main tuning will be required to get max peak
**Use X1 probe unless otherwise noted.
***Voltages are RMS unless otherwise noted.