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TDS 684A, TDS 744A, & TDS 784A Service Manual
6–63
Table 6–5: Normal Supply Voltages (Measured on J26 and J27 on the A11 DRAM
Processor/Display Module)
Supply Lower Limit Upper Limit
Ground (J26 or J27 pin 15)
+5.1 VA (J27 pin 5) +5.0 V +5.2 V
+5.1 VB (J27 pin 17) +5.0 V +5.2 V
+25 V (J27 pin 1) +23.5 V +27.5 V
+5 V (J26 pin 39) +4.9 V +5.1 V
–5.1 V (J26 pin 17) –4.9 V –5.2 V
+15 V (J26 pin 11) +14.7 V +15.3 V
–15 V (J26 pin 7) –14.7 V –15.3 V
Table 6–6: No-Load Supply Voltages (Measured on J5 and J6 on the A17 Main LV
Power Supply Module)
Supply Lower Limit Upper Limit
Ground (J5 or J6 pin 15)
+5.1 VA (J6 pin 5) +4.95 V +5.25 V
+5.1 VB (J6 pin 17) +4.95 V +5.25 V
+25 V (J6 pin 1) +23.5 V +27.5 V
+5 V (J5 pin 39) +0.59 V +0.81 V
–5.1 V (J5 pin 17) –0.39 V –0.61 V
+15 V (J5 pin 11) +1.05 V +1.75 V
–15 V (J5 pin 7) –1.05 V –1.75 V
J5
A17 Main LV Power Supply
Module
1
39
1
39
J6
Figure 6–29: Power Supply Voltage Measurement Locations