Tektronix RTD 710A Service Manual page 8

Section 1 THEORY OF OPERATION (Cont.)
vi
Memory Accass Control .. 2... 1-115
Scroil Register Chip Select . . . . 1-116
DISPLAY DATA OUTPUT (Dia. 55). 1-117
YDatalLatch ........... 1-117
Multiplexer... 2. 0. ee 1-417
Blank Controi Register ...... 4-117
CURSOR AND TRIGGER POINT
CONTROL (Dia. 56) ......... 1-117
Cursor and Trigger Point Generator 1-117
Address Decoder ....5..... 1-417
TR Control (GPIB)... 2.2.00. 1-118
GPIB Address Buffer ....... 1-118
GPIB (Dia. 57) 2.2... 12 ee eee 1-119
Adder 2.0... ee ee eee 1-119
Read/Write Pulse Generator. . . 1-120
Buffer 2... . 2... eee ee 4-120
GPIB Adaptor ....0...0.. 4-120
TRControl ee ee 1-121
ANALOG OUT (Dia.58) 1.2.0... 1-121
Latch ... 0. eee 1-122
Y¥ Analog Output... 2.2. 2. 1-122
X Analog Output. 2... ee. 1-122
ZControl 2. ee 1-122
ROTARY ENCODER (Dia. 59)... . 1-122
Up-Down Counter... 0.0.2. 1-122
Buffer 2... ee 1-122
PANEL MPU INTERFACE (Dia. 60) .. 1-123
Buffer 2... 1-123
Address Decoder ......... 1-123
Option Bit 2... 1-124
LED DECODER (Dia. 61) ...... 1-124
Address Decoder ......... 1-125
7-Sagment LED Made Set... . 1-125
LED Driver. 22 ee 1-125
Secondary Power Switch ..... 1-125
RotaryEncader .. 2.2... 1-125
7-SEGMENT LED (Dia. 62) 2... 1-125
7-Seg LED and Driver... 2... 1-125
LED-1/LED-2 (Dia. 63 & 64) 2.0.2. 1-126
SWITCH MATRIX (Dia. 65) 2... 1-126
VO (Dia. 66) 2... ee 1-126
FRONT AND REAR PANEL (Dia. 67) 1-126
POWER SUPPLY (Dia. 68-72 & 90) 1-126
Line Input 2... ee 1-126
Inverter 2... ee 1-126
Control we 1-128
Regulator-Analog ........ 1-129
Regulator-Digital ......... 1-129
TV TRIGGER OPTION ........ 1-130
ANALOG AND PHASE LOCKED LOOP
CIRCUITRY (Dia. 73&74) ...... 1-130
TV Trigger Sourca Selector . . . . 1-130
Variable Gain Amplifier 2... .. 4-130
Fixed Gain Amplifier and Back-Porch
Clamp .. 2... ...,0000- 1-130
Syne Pickoff Comparator 2... . 1-133
Syne-Tip Clamp and Automatic Gain
Control. 4-133
Section 1 THEORY OF OPERATION (Cont.)
Back-Porch Clamp . 0... 000- 1-433
Vartical Back-Porch Clamp .. . . 1-133
Back-Porch Clamp Switching . . . 1-134
Puise Strecher, Equalizing Pulse
Remover, and Auto Baseline
Generator 2.2... 2.0.02... 1-134
Phase LockedlLoop ........ 1-184
Delayed Horizontal Clock 2... 1-436
Vertical Sync 2... ee 1-136
Flald Sync Generator .. 1... 1-136
DIGITAL CIRCUITRY (Dia. 75)... . 1-186
Line Detect Counter Control . . . . 1-136
Line Detect Counter... ..-.. 1-436
Delay Counter Control .. 1... 1-136
Delay Counter 2.2... 2... 1-438
INDICATOR (Diagram 76) ...... 1-138
LED Driver... ee ee 4-138
Option Bit Buffer 2... 2... 1-138
Power Indicator 2... ...0.. 1-138
Secondary Power Switch ..... 1-138
MAIN INTERCONNECT (Dia. 77 - 88) 1-138
Section 2 DIAGNOSTICS
INTRODUCTION TO DIAGNOSTICS . .2-1
LEVEL 1 DIAGNOSTICS ....... 2-1
LEVEL 2 DIAGNOSTICS ....... 2-2
LEVEL 3 DIAGNOSTICS ....... 2-2
NORMAL OPERATION ERRORS
REPORTED AS EVENT CODES . . .2-3
HOW TO USE DIAGNOSTICS ..... 23
LOCAL CONTROLS AND
INDICATORS/REMOTE GPIB
COMMANDS ............. 2-4
RUNNING A LEVEL 2 DIAGNOSTIC 2-6
OPTION 19 BLANK FRONT PANEL
DIAGNOSTIC OPERATION ..... 2-6
GENERAL DIAGNOSTIC
DESCRIPTIONS ............. 2-7
LEVEL 1 DIAGNOSTICS ....... 2-7
Kernal Definition ©... 2-7
Diagnostic LEDs .. 2... . 2-7
Karnal Verification ......0.. 2-7
Module Functional Verification
Tasting... 0... ee 2-8
LEVEL 2 DIAGNOSTICS ....... 2-8
Diagnostics Structure 2... .... 2-8
Diagnostics Execution Rules. . . 2-8
DIAGNOSTIC CODES AND
DESCRIPTIONS ............. 2-9
ROOT NODE DIAGNOSTICS ... .2-9
10000 MPU MODULE DIAGNOSTICS
Sc) 2-10
10100 System ROM Tasts .. . . 2-10
10200 System RAM Tests... . . a11
20000 DMA MODULE DIAGNOSTICS
(A12Q/A1G/A5O/AS2) . 2.2... 2-12
20100 DMAC Tests ........ 2-13
20200 Buzzer Tester 2.1... 2-15