Sony UP-897MD Service Manual page 68

SAFETY CHECK-OUT
After correcting the original service problem,
perform the following safety checks before
releasing the set to the customer :
LEAKAGE TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to
any exposed metal part having a return to
chassis, must not exceed 0.5 mA. Leakage
current can be measured by any one of three
methods.
1. Acommercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the
manufacturers' instructions to use these
instruments.
2. Abattery-operated AC milliammeter. The
Data Precision 245 digital multimeter is
suitable for this job.
To | Beeman Metal
| Beeman
Parts on Set
|
10 kQ
AC
= Earth Ground
Fig A. Using an AC voltmeter to check AC leakage.
UP-897MD