Main Chassis Adjustment - Hitachi 36UX52B\CZ77 Service Manual

M7LXU
2-7-3 Clock Mode (clock operation check) ............................................ 20
2-7-4 Picture Mode ............................................................. 20
2-7-5 Sound Mode ............................................................. 21
2-7-6 Auto LinkMode ........................................................... 22
V. DEFLECTION CIRCUIT PICTURE ADJUSTMENT
OPERATION CHECK .............................
22
1. M7LXU Chassis High Voltage Limiter Circuit Operation Check
and Overvoltage Protection Circuit Operation Check ........................................ 22
2. FBT Protection Circuit Operation
Check ..................................................
23
3. Check +18v Short Protection Circuit ..................................................... 23
4. Check +14v Short Circuit Protection Circuit ............................................... 23
5. Load Short Protection Circuit Operation Check ............................................ .24
6. WeakElectricFielcl Check ............................................................. 24
VI. REMO-CON OPERATION CHECK .......................................................... 24
1. DirectChannelSelection .............................................................. 24
2. LST-CH Last Channel Recall
...........................................................
24
3. Mute .............................................................................. 24
4.
Recall ............................................................................. 24
5. PinP
..............................................................................
24
6.
Move .............................................................................. 24
7.
Swap ..............................................................................
25
8.
Freeze ............................................................................. 25
9. PinP CH (Except 36CX35B) ............................................................ 25
VII. MEMORY INITIALIZE (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , 25
VIILFINAL ASSEMBLY ADJUSTMENT/COMMON SERVICE ADJUSTMENT
.............................
25
1. Purity Convergence Adjustment ........................................................ 25
1-i Preparation for Adjustment
........................................................
25
l-2 Purity Adjustment by using Microscope ............................................... 25
l-3 Purity Adjustment by Hand Operation ................................................. 28
I-4 Static Convergence Adjustment ...................................................... 30
1-5 Dynamic Convergence Adjustment ................................................... 31
2. FocusAdjustment ................................................................... 31
IX. MATCHING CHECK WITH OTHER INSTRUMENTS ............................................. 32
1. Video 1 InputTerminal Matching Check .................................................. 32
2. Video2lnputTerminalMatchingCheck .................................................. 32
3. Video 3 Input Terminal Matching Check .................................................. 32
4. S-IN Input Terminal Matching Check ..................................................... 32
5. Audio Output Level Check ............................................................. 32
X. SAFETYCHECK ....................................................................... 32
l.PolarityCheck ....................................................................... 32
Xl. MTS OPERATION CHECK ................................................................ 33
l.STEREO/SABroadcastReceivingCheck ................................................. 33
2.
MTSModeCheck
....................................................................
33
3. STEREO Separation Check ............................................................ 33
XII. SETTING FOR DELIVERY . . . . . . . . . . . . . . . . . . . . . . . . . . . = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
XIII. ADJUSTMENT POSITION LIST . . . m . . . . . . . . . . . . . . . . . . . . . I. .
n
. m . . . , m . . . . . . . . . . . . . . . . . . m . . . . .35
Note:
1. MAIN CHASSIS ADJUSTMENT is done with precision equipment. Readjustment is only recommended if the service
technician replaced a defective component related to the circuit.
2. COMMON SERVICE ADJUSTMENT is recommended for the service technician after final troubleshooting and repair
is done. Quick check and fine tuning is advisable to verify that the problem is eliminated.
7