Side Board(S); Keypads; Ir&Led Board; Power - Hitachi 15LD2200 Service Manual

2.3. Side Board(s)

2.3.1.

Keypads

The keypad for 17MB18 main board is in the Table below. (The all other keypads for different cabinets have the same
connector pinning though):
Key Name

Power

Stand-by
TV/AV
Menu
Program-
Program+
Volume-
Volume+
Connector PL1 on keypads (connected to the connector PL175 on the main board):
2.3.2. IR&Led Board
IR&LED board contains LED indicator(s) to show TV's status (Red for stand-by, green for normal operation) and one IR
receiver to get remote control instructions. All the IR&LED boards have the same circuit and connector pinning but the
different mechanical structure to fit different cabinets (see the related section for schematics and connector pinning).
2.4. Power
Several linear regulators and switches are used to generate several separate analog and digital voltage supplies such as +5, +3.3,
+1.8, etc. (Please check the Figure 3, and Table 3 for power management details.)
SIGNAL
12V_INV
12VA
9V
15" TFT TV Service Manual
Type Function
Soft sw. Power shut-down and turn on
Tact sw. Switch between stand-by and turn on modes.
Tact sw. Input source select button.
Tact sw. Display main menu on the screen. If any menu is
active, display the upper menu. If main menu is
active, turn menu off.
Tact sw. Go to the lower program at any time in TV mode.
In menu mode, go to down menu item.
Tact sw. Go to the upper program at any time in TV mode.
In menu mode, go to up menu item.
Tact sw. Decrease the volume level in the volume. In menu
mode, go to left menu item.
Tact sw. Increase the volume level in the volume. In menu
mode, go to right menu item.
Pin No: Name
1 Volume+
2 Volume-
3 Ground
4 Not Connected*
5 Ground
*Reserved: It can be +5V in the future designs if needed.
SUPPLIED ICs
Panel Inverter
IC410, IC411 Audio Amplifiers
IC200 TA1366FG
Pin No: Name:
6 Program+
7 Program-
8 Menu
9 TV/AV
10 Stand-by/Shut-down
- -
X
X
7
15"
17TK26
X
-
X
X
X
X
X
X
SUPPLY
PSU
PSU
LM1117