Panasonic sa ht 928 service manual

Page 2

ISA-HTQZEEE / SA-HTQZSGN / SA-HTQZEGD / SA-HW23GS l SA-HTSZEGC / SA-HTS2BGCS

1 Notes

This document describes necessary service information for the mentioned models on the change of ICZOOZ & the modification
of circuit. This IC is a DC-DC converter for power supply voltage. Following sections include information on the IC type &
method to identity for sen/ice repair.

1.1. Change of IC type (IC2002)

This section describes the necessary information change of lC2002 on the Main P.C.B. Figure 1 below shows the location of
lC2002 (DC-DC Converter).

Purpose : l02002 changed from discrete type (through hole) to surface mount type (Ref to Figure 1 & 2 for diagram).

Result: this leads to modification of Main circuit (power section) & removal of parts. (section 1.3 shows the main circuit modification.
Hence it is very important that the correct type of IC is used for the correct version of Main P.C.B.

Orignal component layer New component layer
(IC2OD2 used m earner productton sets) ("22002 used In later production sets]

(Figure 1)
|C2002 iczooc
Original pattern layer New pattern layer
("32002 used in earlier production sets] 02002 used In later production sen)

(Figure 2)
I62002 l62002