8
Model No: 21HAP1BE
Version 1.0
Adjustment procedure
1. Turn VR501 potentiometer to adjust B+ to specified voltage.
2. Check voltages for video out, vertical out, circuit work and audio power out as follow
Voltage (volt)
14 inch
21 inch
Tolerance
+B 110
110
±2V
Video Out
188
188
±5V
Vertical Out
26
26
±1V
Circuit Work
13
13
±1V
Audio Power Out
12
12
±1V
3. TV signal receiving
a. Press MENU key, to select POS.MEMORY item.
Press V+ or V- key, to select SEARCH or AUTOMEMORY item, press P+ key to start
searching.
b. Press P+ or P- key to inspect the set if there is channel skipped, if so, searching
again by SEARCH as above described.
TV system adapting & AV in/output inspection
Item
AKPH01 chassis
Measuring
Equipment
SG (with NTSC3.58). User remote controller
Dual trace oscilloscope
Preparation
Before Adj.
Input TV and AV signal
Inspection procedure
1. Input the TV signal which system is designated in technical specification
2. Switch TV system to the set by pressing SYS key on user remote controller according to
the TV system in SG. The picture and sound must be normal.
3. Press TV/AV key, to select AV input. The picture and sound must be normal
4. AV output inspection. Load a 75
Ω
resistor to VIDEO output terminal, 1Vp-p video output
signal that is from TV signal should be observed on the oscilloscope. Load a 10K resistor
to AUDIO output terminal, 0.7Vp-p audio output signal that is from TV should be observed
on the oscilloscope.
