Battery Charger Board; Test-Point Identification - Motorola R-20010 Maintenance Manual

WARNING: STATIC-SENSITIVE PARTS- HANDLE APPROPRIATELY.
Table 4-3. Test-Point Identification
(All test points are located near the top edge of the
board. Count them from left to right, as you face the
component-side of the board.)
Test-Point
Number Signal Name
Scope Amplifier Board (A2)
1 VERTICAL DRIVE
2 VERTICAL DEFLECTION DRIVE
3 VERTICAL DEFLECTION DRIVE
4 HORIZONTAL DEFLECTION DRIVE
5
HORIZONTAL DEFLECTION DRIVE
6
HORIZONTAL DRIVE
7
CRTZ-AXIS
8
TIME BASE OUTPUT
9 FOCUS TV
10 INTENSITY TV
Low-Voltage Power Supply-
Battery Charger Board (AS)
1 FREQUENCY STANDARD SUPPLY
2
BATTERY CHARGER SUPPLY
Low-Voltage Power Supply - Control Board (A4)
1 DC CURRENT SENSE
2 ACCURRENT SENSE
3
FREQUENCY STANDARD SUPPLY
4 ERROR VOLTAGE REFERENCE
5
v •.
6 Vs
Low-Voltage Power Supply- Output Board (A5)
1
+UOV
2 +33V
3
+ 12V
4
-sv
5 +5V
6
- 12V
7
- llOV
Low-Voltage Power Supply- Switcher Board (A6)
I
ACDRIVE
2 AC DRJVE
3 DC DRIVE
4
DC DRIVE
Scope/DVM Control Board (A7)
1 VERTICAL CHARACTER SYNC
2 EXT DVM TO
AID
3
+ 15V
4
POSITIVE PEAK DETECTOR
5 I NT DVM TO
AID
6 NEGATIVE PEAK DETECTOR
7 CARRIER + MOD LEVEL
8
CHARACTER GEN RESET
9
GND
LO GND
ll
+ SV
12
- 8V
Table 4-3. Test-Point Identification (Cont)
Test-Point
Number
Signal Name
Audio Synthesizer Board (AlO)
1
SYNTH DPL AUDIO
2 DPLCLOCK
3
UNFILTERED DPL
4
SYNTH D/A OUTPUT
5 GROUND
6
COMPOSITE MODULATION AUDIO
7 COMPOSITE EXTERNAL MOD AUDIO
8
SYNTHESIZER CLOCK
104,857.6
HZ
9 1KHZ MODULATION SOURCE
Processor Interface Board (All)
I
AID
INPUT
2 DVMffREQCOUNTERSELECT
3 FREQUENCY COUNTER INPtrr
Processor (AH)
1 CHARACTER LINE CLOCK
2 CHARACTER ROW CLOCK
3
250 KHZ
4
DOT CLOCK
5 RESET
6
WIT
7 Q
8 R/W
9
E
Front-Panel Interlace Board (Al5)
l ATTENUATORBUFFEROUTPUT
4-14