Removal Of Tuner & Dsp Pwb Board; Removal Of Transformer; Removal Of Audio Pwb Board; Removal Of Components Pwb Board - Hitachi HTA-DD3E Service Manual

3. Removal of Tuner & DSP PWB board
(a) Remove the Push Rivet from the Holder (Front) & Holder (Back) then remove the flat cable Z at the Tuner PWB.
(b) Remove 1 screw + to detech the shield plate from the bottom chassis.
(c) Gently pull the Tuner & DSP PWB board upwards to detach its connectors A, B, C, D, E & F from Main
PWB board.

Removal of Audio PWB board

(a) Gently pull the Audio PWB board upwards to detach its 4 connectors H, I, J & K from Main PWB board.
Removal of S Video/Composit PWB board
(a) Gently pull the Composit and S Video PWB board upwards to detach its 2 connectors L & M from Main PWB
board.

Removal of Components PWB board

(a) Gently pull the Components PWB board upwards to detach its connector N from Main PWB board.
Removal of Relay PWB board
(a) Gently pull the Relay PWB board upwards to
detach its 3 connectors O, P & Q from
Main PWB board.
Push Rivet
DSP PWB
Holder (Front)
Holder (Back)

4. Removal of Transformer

(a) Remove 4 screws 5 from the transformer.
(b) Pull the transformer upward together with the Power PWB section.
Removal of Power PWB board
(a) Remove 1 screw 6 from the Botton chassis at the side.
(b) Release the Power PWB board from its 3 holding claws (PWB support) and gently pull the board free.
Removal of Main PWB board
(a) Detach Flat Cable from FL PWB Board.
(b) Remove 4 screws 7 to release the Power IC from the heat-sink.
(c) Remove 3 screws , to release the bracket from the heat-sink.
(d) Remove 1 screw 8 to release the Component from the heat-sink.
Removal of Heat-Sink
(a) Invert the Botton Chassis, remove 2 screws
9 connect to the heat-sink (Fig 5).
7
x 4
8
x 1
Fig.4
A
E F
Z
D
C
B
DSP PWB
19
for E, E(BS)
SHIELD
PLATE
Main PWB
19 x 1
Flat Cable
– 5 –
O P Q
N
M
L
H
J
K
I
Tuner
S Video PWB
PWB
Audio PWB
5 x 4
6
x 1
Claws (PWB Support)
20 x 3
HTA-DD3
Fig.3
Relay PWB
Component PWB
Composit PWB
6